Development of wood decay in wounded western hemlock and Sitka spruce in southeast Alaska

Hennon, Paul E.; DeMars, Donald J.

doi:10.1139/cjfr-27-12-1971

Cited by 7 publications

(10 citation statements)

References 15 publications

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“…These studies have shown that decay happens more rapidly in warmer and wetter locations and times of the year (Witkamp & van der Drift ; Boddy ; Harmon et al . ; Hennon & DeMars ; Chambers et al . ).…”

Section: Discussionmentioning

confidence: 99%

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A deteriorating state of affairs: How endogenous and exogenous factors determine plant decay rates

et al. 2015

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Summary Woody plants store large quantities of carbon (C) and nutrients. As plants senesce and decay, these stores transfer to the soil or other organisms or are released to the atmosphere. Exogenous factors such as topographic position and microclimatic and edaphic conditions tied to locations affect decay rates; however, we know less about how exogenous relative to endogenous factors such as morphological, anatomical and chemical construction tied to plant species affect these rates, especially across different tissue types. We monitored stem, fine branch and leaf decay over 1 year in ‘rot plots’ distributed across four watersheds in ridge top and valley bottom habitats in a temperate deciduous oak‐hickory forest at Tyson Research Center, MO, USA, in the Ozark Highlands for 21 species of woody plants that vary in their constructions. We found poor coordination across tissues in construction and decay, which likely reflects how functional constraints on living tissues influence recalcitrance to decay. Additionally, for all three tissues, species membership and construction were better predictors of decay than was location. Of the construction traits, chemical composition including total fibre, lignin, cellulose, hemicellulose and concentrations of multiple microelements were the best predictors of decay, although the strength of these relationships differed among tissues. Synthesis. We have long known that rates of biogeochemical cycling are influenced by exogenous factors, such as climatic and edaphic factors. Here, we show across plant tissues that endogenous factors, including species identity and tissue construction, can have stronger controls on rates of decay within our study system than do exogenous factors. However, it is likely that the relative strengths of these different controls change through time and among tissues. We predict that anatomical and morphological controls may be more important at early stages and exogenous factors may be more important at later stages of decay.

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Section: Discussionmentioning

confidence: 99%

“…). For instance, litter turnover rates decrease with latitude (Hennon & DeMars ; Cornwell et al . ).…”

Section: Discussionunclassified

A deteriorating state of affairs: How endogenous and exogenous factors determine plant decay rates

et al. 2015

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“…Growth delays after thinning were also observed in tropical species such as Eucalyptus grandis Total size of excavated area (m 2 ) 4 0 5 0 5 0 4 0 4 0 Stand age (years) 1953-19561948-19521943-19481944-19471942-1947 etration into the stand increases evapotranspiration rates (Pothier and Margolis, 1991). Furthermore, machinery used for removing trees can cause wounds on residual tree boles and their root systems, which may weaken them or create entry points for diseases (Boddy, 2001;Hennon and DeMars, 1997). As thinning shock is reduced with nitrogen fertilization (Brix, 1993;Crown et al, 1977;DeBell et al, 2002;Devine and Harrington, 2009;Winston, 1977), it has also been suggested that site quality contributes to differences in stand response to thinning (DeBell et al, 2002;Harrington and Reukema, 1983;Isomäki, 2004a, 2004b).…”

Section: Introductionmentioning

confidence: 99%

Effect of natural root grafting on growth response of jack pine (Pinus banksiana) after commercial thinning

Tarroux

DesRochers

Krause

2010

Forest Ecology and Management

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“…For wood-production objectives, clearcutting was well suited to the tree species and conditions found in southeast Alaska (Harris and Farr, 1974). The thin bark and poor decay resistance of western hemlock (Tsuga heterophylla) and Sitka spruce (Picea sitchensis) make them susceptible to logging damage and subsequent wound infection by decay fungi, greatly increasing the risk associated with partial cutting (Hennon, 1990;Hennon and DeMars, 1997). Uprooting of residual trees in partial cuts is another serious risk, owing to the shallow rooting habit of the common conifers, thin soils, low strength of water-saturated soils, and violent windstorms common in southeast Alaska (Harris, 1989).…”

Section: Historical Overview Of Forest Management In Southeast Alaskamentioning

confidence: 99%

“…The first incorporates Trummer's model (Trummer et al, 1998) of mistletoe spread from residual trees to the regenerating stand. The second would add the Hennon-DeMars model (Hennon and DeMars, 1997) of decay development following bole wounding of Sitka spruce and western hemlock.…”

Section: Research Responsementioning

confidence: 99%

Recent research on the management of hemlock–spruce forests in southeast Alaska for multiple values

McClellan

2005

Landscape and Urban Planning

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Development of wood decay in wounded western hemlock and Sitka spruce in southeast Alaska

Cited by 7 publications

References 15 publications

A deteriorating state of affairs: How endogenous and exogenous factors determine plant decay rates

A deteriorating state of affairs: How endogenous and exogenous factors determine plant decay rates

Effect of natural root grafting on growth response of jack pine (Pinus banksiana) after commercial thinning

Recent research on the management of hemlock–spruce forests in southeast Alaska for multiple values

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