+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

A methodology for estimating canopy disturbance frequency and intensity in dense temperate forests

, : A methodology for estimating canopy disturbance frequency and intensity in dense temperate forests. Canadian Journal of Forest Research 19(5): 651-663

Analysis of the frequency of past moderate and high-intensity disturbances has been hindered in forests of complex age structure by methodological problems. A methodology is proposed for developing a disturbance chronology in such stands by identifying the probable date of canopy accession for each sample tree. Canopy accession dates are based on an evaluation of radial growth pattern and early growth rates of existing canopy trees. Canopy disturbance intensity is defined as the percentage of sample trees with canopy accession events in each decade. Rotation periods for disturbances of various intensities are calculated from the chronology. The method was evaluated using 893 increment cores from 70 plots in northern hardwood stands of western Upper Michigan. The estimated average disturbance rate for all plots and decades was 5.7-6.9% of land area per decade, with an implied average canopy tree residence time of 145-175 years. These estimates are similar to those obtained by on-site estimates of canopy tree residence time and studies in the literature on the rate of gap formation. Problems in radial increment analysis and possible solutions are discussed.

Accession: 001738488

DOI: 10.1139/x89-102

Submit PDF Full Text: Here

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Related references

Moser, W.K.; Wade, D.D., 2005: Fire exclusion as a disturbance in the temperate forests of the USA: examples from longleaf pine forests. Forest fires are a disturbance where the effects can range from benign to extreme devastation within a given ecosystem. The stage of stand development coupled with prior management dictates the amount and composition of potential fuels. Thus, fire...

Rentch, J.S.; Hicks, R.R.J., 2003: Canopy disturbance intervals, early growth rates, and canopy accession trends of oak-dominated old-growth forests. Using a radial growth averaging technique, changes in growth rates of overstorey oaks (Quercus) were used to quantify canopy disturbance events at five old-growth sites in Ohio, Pennsylvania and West Virginia, USA. On average, at least one canopy...

Schowalter, T.D., 1995: Canopy invertebrate community response to disturbance and consequences of herbivory in temperate and tropical forest. Arboreal invertebrates represent a diverse and functionally important component of forest ecosystems. Many invertebrates respond rapidly and dramatically to changes in environmental conditions, making these organisms potentially useful indicators...

Runkle, J.R., 1985: Disturbance regimes in temperate forests. A discussion of the components of a disturbance regime (average rates, distribution in space and time, severity, rates of recovery, and importance of multiple-gap episodes) with examples of natural regimes from cove forests of the southern Appalac...

Phillips, K.A.; Elvey, C.R.; Abercrombie, C.L., 1997: GPS performance under varying canopy densities in temperate and tropical forests. Taborsky, M [Editor], Taborsky, B [Editor] Advances in Ethology; Contributions to the XXV International Ethological Conference : 301

Binkley, Dan, 1999: Disturbance in temperate forests of the northern hemisphere. Walker, Lawrence R [Author] Ecosystems of the World; Ecosystems of disturbed ground 453-466

Webb, Sara L., 1999: Disturbance by wind in temperate-zone forests. Walker, Lawrence R [Author] Ecosystems of the World; Ecosystems of disturbed ground 187-222

Kuijper, D.P.J.; Verwijmeren, M.; Churski, M.; Zbyryt, A.; Schmidt, K.; Jędrzejewska, Bła.; Smit, C., 2014: What cues do ungulates use to assess predation risk in dense temperate forests?. Anti-predator responses by ungulates can be based on habitat features or on the near-imminent threat of predators. In dense forest, cues that ungulates use to assess predation risk likely differ from half-open landscapes, as scent relative to sigh...

Maxim Larrivée; Christopher M.B.ddle, 2009: Diversity of canopy and understorey spiders in north-temperate hardwood forests. Agricultural and Forest Entomology 11(2): 225-237

Baker, P.J.; Wilson, J.S., 2000: A quantitative technique for the identification of canopy stratification in tropical and temperate forests. Canopy stratification is one of the oldest concepts in tropical forest ecology. However, there has been considerable debate over the existence and identification of strata. Much of the confusion arises from the differing definitions of strata (i.e...