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Trunks are the stems of woody plants and the main structural element of trees. The woody part of the trunk consists of dead but structurally significant heartwood and living sapwood, which is used for nutrient storage and transport. Separating the wood from the bark is the cambium, from which trunks grow in diameter. Bark is divided between the living inner bark (the phloem), which transports sugars, and the outer bark, which is a dead protective layer.

The precise cellular makeup of these components differs between non-flowering plants (gymnosperms) and flowering plants (angiosperms). A variety of specialised cells facilitate the storage of carbohydrates, water, minerals, and transport of water, minerals, and hormones around the plant. Growth is achieved by division of these cells. Vertical growth is generated from the apical meristems (stem tips), and horizontal (radial) growth, from the cambium. Growth is controlled by hormones, which send chemical signals for how and when to grow.

Plants have evolved to both manage and prevent damage from occurring to trunks. Trunks are structured to resist wind forces, through characteristics such as high strength and stiffness, as well as oscillation damping, which involves taking energy, and therefore damage (by extension), out of the trunk and into the branches and leaves. If damaged, trunks employ a complex and slow defence mechanism, which starts by creating a barrier to the incoming disease. Eventually, diseased cells are replaced by new, healthy cells, once the threat is contained.

Ecologically, trunks not only support the extensive ecological function of living trees, but also play a large ecological role when the trees eventually die. Dead trunk matter, termed coarse woody debris, serves many roles including: plant and animal habitat, nutrient cycling, and the transport and control of soil and sediment. Most trees grown outside the tropics can be dated (have their age estimated) by counting their annual rings. Variations in these rings can provide insights into climate, a field of study called dendroclimatology. Trunks have been in continuous use by humans for thousands of years including in construction, medicine, and a myriad of wood-related products. Culturally, trunks are the subject of symbolism, folk belief, ritual, and feature in art of many mediums.

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Occurrence

See also: Plant stem § Stem structure

All vascular plants (those that have xylem and phloem tissues) have both roots and stems. But only gymnosperms, and angiosperms that are both woody and sprout two initial leaves (dicots), have trunks. The rest of the angiosperms can be categorised as either herbaceous plants with one initial leaf (monocots), like bamboo, or herbaceous plants with two initial leaves (dicots), like flax. Neither grow trunks.1

Structure

See also: Plant stem § Stem structure

Trunks, the stems of woody plants, connect the roots to the upper branches, canopy, and leaves. In general, the trunk of woody plants, which is their most easily identifiable feature, consists of: heartwood, sapwood, cambium, inner bark, outer bark, and the pith.23 In this way, the xylem, or wood, of the tree is separated from the bark by the cambium, which functions as a lateral meristem. The cambium promotes growth radially.45 The younger part of the xylem (the sapwood) conducts water up from the roots to the leaves. It also acts as storage for food, through the parenchyma, which is made up of ray cells.6 While only 10% of the sapwood cells are alive, the heartwood, the darker part of the xylem, is completely dead. It proves structural value to the plant.789 The pith is the most minor feature of the trunk, being a remnant from when the stem was not yet woody.10 The purpose of producing a trunk is to enable a taller plant, with greater stability.11

Earlywood and latewood describe the difference in density between wood grown early (low density) and later (high density) in the growing season.12 Tree rings, seen when the trunk is viewed in cross-section, are the result of the difference in cambial growth rates during the year. The difference in thickness of the cells of earlywood and latewood is generally responsible for the presence of growth rings. They are most pronounced in conifers and are mostly not annual in equatorial regions.13 In angiosperms, annual rings are also influenced by the proportion of different cells present in the different regions. This varies between genera, however.14 The outer annual ring or rings are generally responsible for most of the water transport in trees, to differing degrees.1516

In gymnosperms

See also: Gymnosperms

Up to 90% of the xylem of gymnosperms is made up of vertically oriented tracheids, a type of conductive cell, which often overlap one another.17 To facilitate liquid transfer, the cell walls of tracheids contain pits, and are around 100 times as long as they are wide.181920 They also provide structural strength through their thick cell wall.21 In the horizontal (or radial) direction, the most significant component in gymnosperms are wood rays, formed by the cambium. They consist of groups of cells which both store carbohydrates and minerals, but also move water, minerals, and other compounds in the horizontal direction. Ray tracheids and parenchyma, in different combinations, make up the structure of wood rays.22 Parenchyma chiefly function as nutrient storage, but can also assist in liquid transport to a limited degree. They also supply mechanical strength to the tree.23

In angiosperms

See also: Angiosperms

In angiosperms, the axial direction is dominated by fibres, as well as vessel elements, parenchyma cells and tracheids (both vascular and vasicentric), as in gymnosperms. The vessel elements are responsible for the majority of water transport and as such are orientated on top of one-another.24 They range from 1 to 10 m in length and the presence of them can be used to separate hardwoods from softwoods.2526 The structure of fibres is similar to tracheids, but with smaller pits and thicker cell walls. Their main function is structural.27 Generally, the proportion of axial parenchyma found in angiosperms is greater than that found in gymnosperms.28 In the horizontal direction, wood rays can be found, as in gymnosperms, however they consist exclusively of parenchyma.29 In contrast to gymnosperms, the radial water transport is mostly achieved through adjacent axial vessels, or between any axial member through their pits.30

Bark

See also: Bark (botany)

The structure of bark consists of a primary phloem, secondary phloem, cortex, periderm and a dead outer layer of rhytidome. This is the case for radial growth caused by the cambium, called secondary growth. In primary growth located at stem tips, however, the secondary phloem and periderm are not grown. Phloem support carbohydrate transport throughout the tree, through a process called translocation. The periderm protects the trunk from mechanical damage and reduces loss of water.31 Lenticels are small holes in the periderm consisting of porous tissue that allow for gas transfer.32 This includes transfer of carbon dioxide, oxygen, and water.33

Growth

Main articles: Primary growth and Secondary growth

There are two types of growth that produce tree trunks: primary (vertical) growth of stems, and secondary (radial) growth through the cambium. Primary growth occurs on the apical meristems through apical dominance, in which buds not at the tip are prevented from growing.3435

Secondary growth occurs in the vascular part of the cambium, in the cambial zone, a layer between 1 and 10 cells thick. Both additive and multiplicative division take place in this zone. In additive division, fusiform (thin but wide in the middle) initial cells (initials) are tangentially divided to produce mother cells for the subsequent production of xylem and phloem cells. In multiplicative division, the same initial cells are divided anticlinally (in perpendicular direction to neighbouring cells). This is the division responsible for growing the diameter of the trunk.3637

When trees grow on a lean, it causes an increase in density and cambial growth in the concave section being leaned on. This wood this creates is called reaction wood and is generally undesirable. In angiosperms it is known as tension wood and in gymnosperms as compression wood, as a result of the different strategies (or reactions) employed by the trees.383940

Hormones

Auxin is the hormone responsible for preventing auxiliary buds from growing, thus fostering apical dominance.41 The exact mechanism and full picture of its contribution, as well as genetic and other factors is not clear.42

Although all of the major plant growth hormones can be found in the cambium region, auxin exerts a major influence on both divisions that occur in the cambial zone. There is some evidence that gibberellins have an effect on cambial growth in some plants.43 There is evidence to suggest that exogenous cytokinins both stimulate and do not stimulate cambial growth rates.44 Abscisic acid (ABA) has an effect on cambial growth, although it is not clear in what way. Ethylene has been found to contribute to controlling the amount of xylem or phloem cells being produced by trees.45 Ethephon (or ethrel) has been shown to effect the sizes of xylem and phloem cells and cell walls, depending on its concentration.46 Both Indole-3-acetic acid (IAA) and ABA have a variable effect on tree trunk growth, depending on the time of year.47

Wounding

If a tree trunk is damaged either mechanically or chemically a wound can be produced, which increases the risk of disease through pathogens.48 In response, the sapwood creates a barrier of discoloured wood which contains extractives. Extractives are special molecules found but not attached (extraneous) to cell walls.49 The effect of this is to inhibit the movement of pathogens or other micro-organisms. If broken through, the tree will further block motion using thicker-walled cells, tyloses, or by plugging vessels, depending on the species. In general, wounds generate a complex biochemical and physiological response which is not fully understood. To eventually heal a wound, the trees produce callus tissue that is later converted into new cambial cells.50

Mechanics

Forces imposed by wind affect both the growth and structure of trees. They result in internal forces (stress) and elongations (strain), as well as vibrations. To adapt and evolve to face these, tree trunks have an internal structure that resists oscillation and fracture.51 Static (stationary) analysis provides a basis for understanding the effects of self weight and wind, while dynamic (moving) analysis describes a more accurate depiction of wind loading.52

Statics

The structure of wood is such that it can neither be called totally elastic (spring-like) or totally viscous (fluid-like), and therefore it is described as viscoelastic (somewhere in between).53 In addition to this, wood is not isotropic (the same in all directions) like traditionally studied materials such as metals and also behaves in a non-linear way.5455 This is as a result of different cell orientations and the angles of microfibrils in the cell walls.56 This, together with other variable factors such as the moisture content and turgor pressure (force exerted by water in plants), make most conventional engineering analysis not applicable.57 Simplifying the structure of tree trunks for analysis can be done in three ways. One way is to treat them as a composite material, in which tracheids and fibres bear most of the load. Another is to consider them to be a multilamellar composite, where each unit contains one or more laminae.58 Each of these is then said to be a composite material consisting of microfibrils of cellulose embedded in either pectinhemicellulose or lignin–hemicellulose. The third way is to consider the cellular structure of the trunk, based on the mechanical properties, density, and shape of the constituent cells.59

Properties

Increased density (mass per unit of volume) and diameter (thickness of trunk) are proportional to increased mechanical properties, including stiffness and strength.6061 In higher density trunks, failure from bending (as a result of wind forces, for example) is more likely to occur from tensile (pulling) fracture than in lower density trunks, where buckling will most likely occur. The fibre saturation point is the moisture level at which further drying has limited effect on mechanical properties. Up until this point, decreasing moisture content increases properties in wood the same way as increased density.62 In response to winds or other mechanical stimuli, plants alter their growth through thigmomorphogenesis. The principle factor that affects the properties, resulting in increased stiffness, is the increase in radius this generates.63 Another key property of trunks is how hollow they are. Less hollow trees are less likely to buckle and more likely to fail through fracture or yielding.64 Junctions where branches come out of the trunk are the weakest points because they cause a wood-structure called a knot.6566 The contribution that bark has to structural stiffness is minimal.67

Dynamics

When woody plants oscillate in the wind, there is a risk that they will do so at a resonant frequency (yielding the maximum response), which may lead to branches falling off or even uprooting. The risk is high because they naturally vibrate at a frequency similar to that of the turbulent wind's resonance (at peak energy).68 Although the canopy provides most of the damping effect (lowering the oscillation), structural damping is also of significance. In trees it involves the movement of energy, away from the critical trunk and towards the smaller branches and branchlets. The similarities in natural frequencies in each part of the tree is what enables this. The net effect of these strategies is oscillation damping, which is valuable because it does not require the tree area (and so wind forces) to increase.69

Ecology

See also: Tree § Ecology

The ecology of living tree trunks is inseparable from the ecology of the trees themselves. Where a tree supports a rich ecology, its trunk does also, by providing key structural and nutritional functions. Tree trunks support plants, like epiphytes which grow directly on the tree,70 as well as invertebrates and animals.71

Dead

Main article: Coarse woody debris § Benefits

When a tree dies, as a result of, for example, wind, fire, disease, insects, or suppression, it becomes coarse woody debris (CWD). This takes the form of dead standing trees, fallen tree trunks, large branches, or chunks of wood.72 Later it will turn into fine woody debris. CWD's ecological value is extensive, as demonstrated by its use as a habitat (place for animals to live), establishment of seedlings, nutrient cycling, nitrogen fixation, food value, and sediment transport in rivers.7374

There are several mechanisms by which CWD decomposes, thus contributing to nutrient cycling. These are: leaching, where water diffuses through CWD and removes minerals;75 fragmentation, mechanically both by animals and plants;76 transport in rivers, both mechanically and microbially; collapse, when the tree cannot support its own weight;77 respiration, performed by microbes;78 and biological transformation, where CWD is metabolised (broken down) by microbes and invertebrates.79 Decomposition is affected by factors including: temperature, moisture, oxygen and carbon dioxide levels, nutrient quality of the CWD, size, and organisms present.8081 CWD represents a significant fraction of all above ground nutrient, carbon, and organic matter storage.82

CWD is a critical substrate (living surface) for autotrophs (plants, algae, bacteria etc.) and serves many important ecological roles for them. Autotrophs known to use CWD are many and varied and include: lichens, liverworts, algae, ferns, clubmosses, and both angiosperms and gymnosperms.83 CWD may provide: just a living surface, for epiphytes; nutrient value for their roots, both from the CWD and on top of the CWD; shade; and preventing of material flowing down hills.84 CWD is used by many animals as a habitat for a variety of purposes. These include: cover, feeding, reproduction and, to a lesser extent, resting, sleeping, as bridges, and for both roosting and hibernation.85 Animals recorded using CWD in these ways are varied and include: birds, bats, as well as reptiles, amphibians, and fish.8687 The orientation, size, and shape of CWD affects if and how these animals use it.88

CWD has geomorphic (landform) impacts on both hills and waterways, as well as impacts on the transportation of soil and sediment.89 Uprooted trees mix and enrich the soil, and logs act to block the movement of soil, water, and sediment down hill.90 In waterways, CWD has an influence on their size and shape, and plays a crucial role in storing sediment.91

Dating

Main articles: Dendrochronology and Dendroclimatology

Tree rings can be used both to date the age of a tree, using dendrochronology, and to understand the climate under which the tree lived, through dendroclimatology. In dendrochronology, with the exception of trees grown in specific environments (such as near the equator) and under certain pressures (drought), each tree ring generally represents a period of one year of growth.92

In dendroclimatology, the influence of climate on the nature of each annual ring is analysed. Two key measurements are the total width of the ring and the maximum density of the latewood.93 Higher latewood densities and ring widths correspond to higher average summer temperatures.94

Uses

See also: Tree § Uses

Products derived from tree trunks such as timber have been used by humans in construction and a myriad of other ways for thousands of years. It is the only major building material that is grown, and is therefore broadly sustainable, and is strong—especially in compression.95 Beyond construction and a plethora of wooden products, including paper,96 it is used also as wood fuel to heat homes, for power generation, and to make charcoal.9798 Resins, which are exuded by plants, can be harvested and used in products such as varnishes.99100 The barks of different trees have a variety of different uses, including: the antimalarial properties of Cinchona; balloons made from Wikstroemia and others, fire extinguisher foam from Quillaja saponaria; dying products from tannins from Acacia mearnsii and others;101 and cork from Quercus suber.102103 There are many other medicinal uses of trunks and barks.104105106 Latex, which is exuded by some trees, is used to produce rubber; a flexible and waterproof material.107

In culture

See also: Tree § Mythology

Tree trunks are the subject of symbolism, ritual, folk belief, and are used often in both functional and artistic constructions.108 The idea that trees represent some eternal life force may have begun after humans saw new growth sprouting from old, dead trunks.109 The shape of tree trunks and branches are similar to the human form, leading to anthropomorphism and representing fertility in some cultures.110 In parts of North America, and sub-Saharan Africa, people perform ''marriages'' with trees by touching them for long periods.111 In India, ceremonial marriages are conducted between trees of different species and between people and trees for various ritual purposes.112113114 In Greek mythology, humans and nymphs, such as Daphne, are often turned into trees as a way to grant protection to them.115

The structure of trees trunks and branches serve as a metaphor for connection between things in many languages, as in family trees and branches of knowledge.116 The trunks of trees are significant to many indigenous peoples, both spiritually and for their resources. The Mbuti people of the Democratic Republic of the Congo, for example, make ritual dress, decorated with abstract patterns, from tree bark.117 The western Warlpiri people of Australia believe that human souls accumulate and are sourced at birth from the trunks of trees.118 Tree trunks are widely used to make canoes and totem poles, as created by peoples in the Pacific Northwest.119 In the Chatham Islands of New Zealand, trunks of the tree Corynocarpus laevigatus are carved with arborglyphs, made by the Moriori people.120

Bibliography

References

  1. Shah, Reynolds & Ramage 2017, p. 4499. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  2. Pallardy & Kozlowski 2008, p. 20. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  3. Wiedenhoeft & Miller 2005, p. 11. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  4. Pallardy & Kozlowski 2008, p. 19. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  5. Bernatzky 1978, p. 20. - Bernatzky, Aloys (1978). Tree ecology and preservation. Developments in agricultural and managed-forest ecology. Vol. 2. Elsevier. ISBN 0444416064.

  6. Wiedenhoeft & Miller 2005, p. 12. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  7. Pallardy & Kozlowski 2008, p. 20. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  8. Bernatzky 1978, p. 19. - Bernatzky, Aloys (1978). Tree ecology and preservation. Developments in agricultural and managed-forest ecology. Vol. 2. Elsevier. ISBN 0444416064.

  9. Wiedenhoeft & Miller 2005, p. 12. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  10. Wiedenhoeft & Miller 2005, p. 11. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  11. Plavcová et al. 2019, p. 3690. - Plavcová, Lenka; et al. (2019). "Mechanical properties and structure–function trade-offs in secondary xylem of young roots and stems". Journal of Experimental Botany. 70 (14): 3679–3691. doi:10.1093/jxb/erz286. ISSN 0022-0957. PMID 31301134. https://academic.oup.com/jxb/article/70/14/3679/5531920

  12. Pallardy & Kozlowski 2008, p. 21. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  13. Creber 1977, p. 349–350. - Creber, G. T. (1977). "Tree rings: a natural data-storage system". Biological Reviews. 52 (3): 349–381. doi:10.1111/j.1469-185X.1977.tb00838.x. ISSN 1469-185X. https://onlinelibrary.wiley.com/doi/10.1111/j.1469-185X.1977.tb00838.x

  14. Pallardy & Kozlowski 2008, p. 20. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  15. Pallardy & Kozlowski 2008, p. 314. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  16. Bernatzky 1978, p. 19. - Bernatzky, Aloys (1978). Tree ecology and preservation. Developments in agricultural and managed-forest ecology. Vol. 2. Elsevier. ISBN 0444416064.

  17. Pallardy & Kozlowski 2008, p. 24. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  18. Pallardy & Kozlowski 2008, p. 24. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  19. Dahle & Grabosky 2009, p. 312. - Dahle, Gregory; Grabosky, Jason (2009). "Review of literature on the function and allometric relationships of tree stems and branches". Arboriculture & Urban Forestry. 35 (6): 311–320. doi:10.48044/jauf.2009.047. ISSN 1935-5297. https://doi.org/10.48044/jauf.2009.047

  20. Wiedenhoeft & Miller 2005, p. 21. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  21. Dahle & Grabosky 2009, p. 312. - Dahle, Gregory; Grabosky, Jason (2009). "Review of literature on the function and allometric relationships of tree stems and branches". Arboriculture & Urban Forestry. 35 (6): 311–320. doi:10.48044/jauf.2009.047. ISSN 1935-5297. https://doi.org/10.48044/jauf.2009.047

  22. Pallardy & Kozlowski 2008, p. 25. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  23. Plavcová et al. 2019, p. 3690. - Plavcová, Lenka; et al. (2019). "Mechanical properties and structure–function trade-offs in secondary xylem of young roots and stems". Journal of Experimental Botany. 70 (14): 3679–3691. doi:10.1093/jxb/erz286. ISSN 0022-0957. PMID 31301134. https://academic.oup.com/jxb/article/70/14/3679/5531920

  24. Dahle & Grabosky 2009, p. 312. - Dahle, Gregory; Grabosky, Jason (2009). "Review of literature on the function and allometric relationships of tree stems and branches". Arboriculture & Urban Forestry. 35 (6): 311–320. doi:10.48044/jauf.2009.047. ISSN 1935-5297. https://doi.org/10.48044/jauf.2009.047

  25. Pallardy & Kozlowski 2008, p. 26. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  26. Wiedenhoeft & Miller 2005, p. 24. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  27. Wiedenhoeft & Miller 2005, p. 25. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  28. Pallardy & Kozlowski 2008, p. 26. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  29. Pallardy & Kozlowski 2008, p. 27. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  30. Pallardy & Kozlowski 2008, p. 26. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  31. Pallardy & Kozlowski 2008, p. 27. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  32. Lendzian 2006, p. 2536. - Lendzian, Klaus J. (2006). "Survival strategies of plants during secondary growth: barrier properties of phellems and lenticels towards water, oxygen, and carbon dioxide". Journal of Experimental Botany. 57 (11): 2535–2546. doi:10.1093/jxb/erl014. ISSN 0022-0957. PMID 16820395. https://academic.oup.com/jxb/article/57/11/2535/675330

  33. Lendzian 2006, p. 2542. - Lendzian, Klaus J. (2006). "Survival strategies of plants during secondary growth: barrier properties of phellems and lenticels towards water, oxygen, and carbon dioxide". Journal of Experimental Botany. 57 (11): 2535–2546. doi:10.1093/jxb/erl014. ISSN 0022-0957. PMID 16820395. https://academic.oup.com/jxb/article/57/11/2535/675330

  34. Pallardy & Kozlowski 2008, p. 53. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  35. Tognetti, Bielach & Hrtyan 2017, p. 2586. - Tognetti, Vanesa B.; et al. (2017). "Redox regulation at the site of primary growth: auxin, cytokinin and ROS crosstalk". Plant, Cell & Environment. 40 (11): 2586–2605. Bibcode:2017PCEnv..40.2586T. doi:10.1111/pce.13021. ISSN 1365-3040. PMID 28708264. https://onlinelibrary.wiley.com/doi/10.1111/pce.13021

  36. Pallardy & Kozlowski 2008, p. 55. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  37. Shah, Reynolds & Ramage 2017, p. 4499. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  38. Pallardy & Kozlowski 2008, p. 61. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  39. Shigo 1986, p. 90. - Shigo, Alex L. (1986). A new tree biology dictionary: terms, topics, and treatments for trees and their problems and proper care (3. print ed.). Shigo & Trees. ISBN 0943563054.

  40. James et al. 2018, p. 5. - James, K. R.; et al. (2018). "Tree biomechanics". CABI Reviews: 1–11. doi:10.1079/PAVSNNR201712038. ISSN 1749-8848. https://www.cabidigitallibrary.org/doi/10.1079/PAVSNNR201712038

  41. Tognetti, Bielach & Hrtyan 2017, p. 2587. - Tognetti, Vanesa B.; et al. (2017). "Redox regulation at the site of primary growth: auxin, cytokinin and ROS crosstalk". Plant, Cell & Environment. 40 (11): 2586–2605. Bibcode:2017PCEnv..40.2586T. doi:10.1111/pce.13021. ISSN 1365-3040. PMID 28708264. https://onlinelibrary.wiley.com/doi/10.1111/pce.13021

  42. Pallardy & Kozlowski 2008, p. 53. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  43. Pallardy & Kozlowski 2008, p. 58. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  44. Pallardy & Kozlowski 2008, p. 59. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  45. Pallardy & Kozlowski 2008, p. 59. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  46. Pallardy & Kozlowski 2008, p. 60. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  47. Pallardy & Kozlowski 2008, p. 60. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  48. Bernatzky 1978, p. 21. - Bernatzky, Aloys (1978). Tree ecology and preservation. Developments in agricultural and managed-forest ecology. Vol. 2. Elsevier. ISBN 0444416064.

  49. Morel-Rouhier 2021, p. 125. - Morel-Rouhier, Mélanie (2021), Morel-Rouhier, Mélanie; Sormani, Rodnay (eds.), "Chapter Four - Wood as a hostile habitat for ligninolytic fungi", Advances in Botanical Research, Wood Degradation and Ligninolytic Fungi, vol. 99, Academic Press, doi:10.1016/bs.abr.2021.05.001, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S0065229621000513

  50. Pallardy & Kozlowski 2008, pp. 67–68. - Pallardy, Stephen G.; Kozlowski, T. T. (2008). Physiology of woody plants (3rd ed.). Elsevier. ISBN 9780120887651. OCLC 166255090. https://www.worldcat.org/title/166255090

  51. James et al. 2018, p. 6. - James, K. R.; et al. (2018). "Tree biomechanics". CABI Reviews: 1–11. doi:10.1079/PAVSNNR201712038. ISSN 1749-8848. https://www.cabidigitallibrary.org/doi/10.1079/PAVSNNR201712038

  52. James et al. 2014, p. 2. - James, Kenneth R.; et al. (2014). "Tree biomechanics literature review: dynamics". Arboriculture & Urban Forestry. 40 (1): 1–15. doi:10.48044/jauf.2014.001. ISSN 1935-5297. https://auf.isa-arbor.com/content/40/1/1

  53. James et al. 2014, p. 2. - James, Kenneth R.; et al. (2014). "Tree biomechanics literature review: dynamics". Arboriculture & Urban Forestry. 40 (1): 1–15. doi:10.48044/jauf.2014.001. ISSN 1935-5297. https://auf.isa-arbor.com/content/40/1/1

  54. James et al. 2014, p. 2. - James, Kenneth R.; et al. (2014). "Tree biomechanics literature review: dynamics". Arboriculture & Urban Forestry. 40 (1): 1–15. doi:10.48044/jauf.2014.001. ISSN 1935-5297. https://auf.isa-arbor.com/content/40/1/1

  55. Shah, Reynolds & Ramage 2017, p. 4498. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  56. Lachenbruch & McCulloh 2014, p. 751. - Lachenbruch, Barbara; McCulloh, Katherine A. (2014). "Traits, properties, and performance: how woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant". New Phytologist. 204 (4): 747–764. Bibcode:2014NewPh.204..747L. doi:10.1111/nph.13035. ISSN 1469-8137. PMID 25250668. https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.13035

  57. Shah, Reynolds & Ramage 2017, p. 4498. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  58. Shah, Reynolds & Ramage 2017, p. 4501. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  59. Shah, Reynolds & Ramage 2017, p. 4503. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  60. Shah, Reynolds & Ramage 2017, p. 4503. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  61. Lachenbruch & McCulloh 2014, p. 751. - Lachenbruch, Barbara; McCulloh, Katherine A. (2014). "Traits, properties, and performance: how woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant". New Phytologist. 204 (4): 747–764. Bibcode:2014NewPh.204..747L. doi:10.1111/nph.13035. ISSN 1469-8137. PMID 25250668. https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.13035

  62. Shah, Reynolds & Ramage 2017, p. 4504. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  63. Shah, Reynolds & Ramage 2017, p. 4505. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  64. Shah, Reynolds & Ramage 2017, p. 4505. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  65. Shah, Reynolds & Ramage 2017, p. 4505. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  66. Lachenbruch & McCulloh 2014, p. 752. - Lachenbruch, Barbara; McCulloh, Katherine A. (2014). "Traits, properties, and performance: how woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant". New Phytologist. 204 (4): 747–764. Bibcode:2014NewPh.204..747L. doi:10.1111/nph.13035. ISSN 1469-8137. PMID 25250668. https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.13035

  67. Shah, Reynolds & Ramage 2017, p. 4501. - Shah, Darshil U; et al. (2017). "The strength of plants: theory and experimental methods to measure the mechanical properties of stems". Journal of Experimental Botany. 68 (16): 4497–4516. doi:10.1093/jxb/erx245. ISSN 0022-0957. PMID 28981787. https://academic.oup.com/jxb/article/68/16/4497/4107595

  68. Gardiner, Berry & Moulia 2016, p. 102. - Gardiner, Barry; et al. (2016). "Review: wind impacts on plant growth, mechanics and damage". Plant Science. 245: 94–118. Bibcode:2016PlnSc.245...94G. doi:10.1016/j.plantsci.2016.01.006. ISSN 0168-9452. PMID 26940495. https://linkinghub.elsevier.com/retrieve/pii/S0168945216300061

  69. Gardiner, Berry & Moulia 2016, p. 102. - Gardiner, Barry; et al. (2016). "Review: wind impacts on plant growth, mechanics and damage". Plant Science. 245: 94–118. Bibcode:2016PlnSc.245...94G. doi:10.1016/j.plantsci.2016.01.006. ISSN 0168-9452. PMID 26940495. https://linkinghub.elsevier.com/retrieve/pii/S0168945216300061

  70. Zotz 2016, p. 1. - Zotz, Gerhard (2016). Plants on plants - the biology of vascular epiphytes. Fascinating Life Sciences. Springer International Publishing AG. ISBN 9783319392370.

  71. Zotz 2016, p. 219. - Zotz, Gerhard (2016). Plants on plants - the biology of vascular epiphytes. Fascinating Life Sciences. Springer International Publishing AG. ISBN 9783319392370.

  72. Harmon et al. 1986, pp. 133–134. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  73. Harmon et al. 1986, p. 134–135. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  74. Graham 1925, p. 397. - Graham, S. A. (1925). "The felled tree trunk as an ecological unit". Ecology. 6 (4): 397–411. Bibcode:1925Ecol....6..397G. doi:10.2307/1929106. ISSN 0012-9658. JSTOR 1929106. https://www.jstor.org/stable/1929106

  75. Harmon et al. 1986, p. 149. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  76. Harmon et al. 1986, p. 150. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  77. Harmon et al. 1986, p. 150. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  78. Harmon et al. 1986, pp. 151–152. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  79. Harmon et al. 1986, pp. 152–153. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  80. Harmon et al. 1986, pp. 168–188. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  81. Graham 1925, p. 408. - Graham, S. A. (1925). "The felled tree trunk as an ecological unit". Ecology. 6 (4): 397–411. Bibcode:1925Ecol....6..397G. doi:10.2307/1929106. ISSN 0012-9658. JSTOR 1929106. https://www.jstor.org/stable/1929106

  82. Harmon et al. 1986, p. 247. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  83. Harmon et al. 1986, p. 218. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  84. Harmon et al. 1986, pp. 218–219. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  85. Harmon et al. 1986, p. 226. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  86. Harmon et al. 1986, p. 225. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  87. Harmon et al. 1986, p. 233. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  88. Harmon et al. 1986, p. 225. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  89. Harmon et al. 1986, p. 261. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  90. Harmon et al. 1986, p. 262. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  91. Harmon et al. 1986, pp. 263–265. - Harmon, M.E.; et al. (1986), "Ecology of coarse woody debris in temperate ecosystems", Advances in Ecological Research, 15, Elsevier: 133, Bibcode:1986AdER...15..133H, doi:10.1016/s0065-2504(08)60121-x, ISBN 0120139154, ISSN 0065-2504, retrieved 15 April 2025 https://linkinghub.elsevier.com/retrieve/pii/S006525040860121X

  92. Wiedenhoeft & Miller 2005, p. 15. - Wiedenhoeft, Alex C.; Miller, Regis B. (2005). Rowell, Roger M. (ed.). Handbook of wood chemistry and wood composites: structure and function of wood. CRC Press. ISBN 9780849315886.

  93. Hughes, Swetnam & Diaz 2011, p. 18. - Hughes, Malcolm K.; Swetnam, Thomas W.; Diaz, Henry F., eds. (2011). "Dendroclimatology". Developments in Paleoenvironmental Research. 11. doi:10.1007/978-1-4020-5725-0. ISBN 9781402040108. ISSN 1571-5299. https://link.springer.com/book/10.1007/978-1-4020-5725-0

  94. Hughes, Swetnam & Diaz 2011, p. 29. - Hughes, Malcolm K.; Swetnam, Thomas W.; Diaz, Henry F., eds. (2011). "Dendroclimatology". Developments in Paleoenvironmental Research. 11. doi:10.1007/978-1-4020-5725-0. ISBN 9781402040108. ISSN 1571-5299. https://link.springer.com/book/10.1007/978-1-4020-5725-0

  95. Ramage et al. 2017, p. 333. - Ramage, Michael H.; et al. (2017). "The wood from the trees: The use of timber in construction". Renewable and Sustainable Energy Reviews. 68: 333–359. Bibcode:2017RSERv..68..333R. doi:10.1016/j.rser.2016.09.107. ISSN 1364-0321. https://linkinghub.elsevier.com/retrieve/pii/S1364032116306050

  96. Seth 2003, p. 351. - Seth, M. K. (2003). "Trees and their economic importance". The Botanical Review. 69 (4): 321. doi:10.1663/0006-8101(2004)069[0321:TATEI]2.0.CO;2. ISSN 1874-9372. https://link.springer.com/article/10.1663/0006-8101(2004)069%5B0321:TATEI%5D2.0.CO;2

  97. Ramage et al. 2017, p. 352. - Ramage, Michael H.; et al. (2017). "The wood from the trees: The use of timber in construction". Renewable and Sustainable Energy Reviews. 68: 333–359. Bibcode:2017RSERv..68..333R. doi:10.1016/j.rser.2016.09.107. ISSN 1364-0321. https://linkinghub.elsevier.com/retrieve/pii/S1364032116306050

  98. Seth 2003, p. 349. - Seth, M. K. (2003). "Trees and their economic importance". The Botanical Review. 69 (4): 321. doi:10.1663/0006-8101(2004)069[0321:TATEI]2.0.CO;2. ISSN 1874-9372. https://link.springer.com/article/10.1663/0006-8101(2004)069%5B0321:TATEI%5D2.0.CO;2

  99. Cunningham 2014, p. 2. - Cunningham, Anthony B. (2014). "The ethnobotany, use, and sustainable harvest of bark: a review". Advances in Economic Botany. 17: 27–55. ISSN 0741-8280. JSTOR 43932772. https://www.jstor.org/stable/43932772

  100. Seth 2003, p. 370. - Seth, M. K. (2003). "Trees and their economic importance". The Botanical Review. 69 (4): 321. doi:10.1663/0006-8101(2004)069[0321:TATEI]2.0.CO;2. ISSN 1874-9372. https://link.springer.com/article/10.1663/0006-8101(2004)069%5B0321:TATEI%5D2.0.CO;2

  101. Cunningham 2014, p. 2. - Cunningham, Anthony B. (2014). "The ethnobotany, use, and sustainable harvest of bark: a review". Advances in Economic Botany. 17: 27–55. ISSN 0741-8280. JSTOR 43932772. https://www.jstor.org/stable/43932772

  102. Cunningham 2014, p. 31. - Cunningham, Anthony B. (2014). "The ethnobotany, use, and sustainable harvest of bark: a review". Advances in Economic Botany. 17: 27–55. ISSN 0741-8280. JSTOR 43932772. https://www.jstor.org/stable/43932772

  103. Seth 2003, p. 370. - Seth, M. K. (2003). "Trees and their economic importance". The Botanical Review. 69 (4): 321. doi:10.1663/0006-8101(2004)069[0321:TATEI]2.0.CO;2. ISSN 1874-9372. https://link.springer.com/article/10.1663/0006-8101(2004)069%5B0321:TATEI%5D2.0.CO;2

  104. Cunningham 2014, p. 30. - Cunningham, Anthony B. (2014). "The ethnobotany, use, and sustainable harvest of bark: a review". Advances in Economic Botany. 17: 27–55. ISSN 0741-8280. JSTOR 43932772. https://www.jstor.org/stable/43932772

  105. Seth 2003, p. 339. - Seth, M. K. (2003). "Trees and their economic importance". The Botanical Review. 69 (4): 321. doi:10.1663/0006-8101(2004)069[0321:TATEI]2.0.CO;2. ISSN 1874-9372. https://link.springer.com/article/10.1663/0006-8101(2004)069%5B0321:TATEI%5D2.0.CO;2

  106. Turner et al. 2009, p. 249. - Turner, Nancy J.; et al. (2009). "Cultural management of living trees: an international perspective". Journal of Ethnobiology. 29 (2): 237–270. doi:10.2993/0278-0771-29.2.237. ISSN 0278-0771. https://journals.sagepub.com/doi/abs/10.2993/0278-0771-29.2.237

  107. Twiss 1935, p. 1075. - Twiss, D. F. (1935). "II.—Rubber latex as a manufacturing material". Journal of the Royal Society of Arts. 83 (4324): 1075–1091. ISSN 0035-9114. JSTOR 41360559. https://www.jstor.org/stable/41360559

  108. Crews 2003, p. 37. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  109. Crews 2003, p. 37. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  110. Crews 2003, p. 39. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  111. Crews 2003, p. 39. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  112. Edwardes & Edwards 1922, pp. 78–86. - Edwardes, S. M.; Edwards, S. M. (1922). "Tree-worship in india". Empire Forestry Journal. 1 (1): 78–86. ISSN 2054-7447. JSTOR 42594479. https://www.jstor.org/stable/42594479

  113. Venkatesan 2021, pp. 478–495. - Venkatesan, Soumhya (2021). "The wedding of two trees: connections, equivalences, and subjunctivity in a Tamil ritual". Journal of the Royal Anthropological Institute. 27 (3): 478–495. doi:10.1111/1467-9655.13550. ISSN 1359-0987. https://rai.onlinelibrary.wiley.com/doi/10.1111/1467-9655.13550

  114. Longhurst 1955, pp. 36–37. - Longhurst, A. H. (1955). "The marriage of trees in south India". Antiquity. 29 (113): 36–37. doi:10.1017/S0003598X0011909X. ISSN 0003-598X. https://www.cambridge.org/core/product/identifier/S0003598X0011909X/type/journal_article

  115. Crews 2003, p. 39. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  116. Crews 2003, p. 40. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  117. Crews 2003, p. 38. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  118. Crews 2003, p. 40. - Crews, J (2003). "Forest and tree symbolism in folklore". Unasylva. 54 (213). doi:10.1016/s0378-1127(02)00525-x. ISSN 0378-1127. https://doi.org/10.1016/s0378-1127(02)00525-x

  119. Turner et al. 2009, p. 260. - Turner, Nancy J.; et al. (2009). "Cultural management of living trees: an international perspective". Journal of Ethnobiology. 29 (2): 237–270. doi:10.2993/0278-0771-29.2.237. ISSN 0278-0771. https://journals.sagepub.com/doi/abs/10.2993/0278-0771-29.2.237

  120. Maxwell et al. 2016, p. 307. - Maxwell, Justin J.; et al. (1 October 2016). "The timing and importance of arboriculture and agroforestry in a temperate East Polynesia society, the Moriori, Rekohu (Chatham Island)". Quaternary Science Reviews. 149: 306–325. Bibcode:2016QSRv..149..306M. doi:10.1016/j.quascirev.2016.08.006. ISSN 0277-3791. https://linkinghub.elsevier.com/retrieve/pii/S0277379116302785