کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9443385 | 1617577 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling the interacting effects of browsing and shading on mountain forest tree regeneration (Picea abies)
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The model was applied to Picea abies saplings in mountain forests of eastern Switzerland after calibration based on data for sapling height growth, radial growth, and biomass components under varying light conditions. Independent data were used to test the ability of the model to represent sapling responses to browsing. The model slightly over-predicted sapling height, while no significant differences were found between simulated and observed basal diameter, total biomass or leaf biomass. Model experiments were conducted to explore the interactive effects of winter browsing intensity and relative light availability upon sapling net growth. Simulated shading effects were gradual until approximately 40% relative light availability (if browsing pressure was low) or 60% relative light availability (if browsing pressure was high). Below these values, the model simulates sharp declines in net growth rate. Model results suggest nonlinear responses to browsing and light availability, and the existence of light intensity thresholds for forest regeneration that should be relevant for management activities affecting deer density and crown cover.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 185, Issues 2â4, 10 July 2005, Pages 213-230
Journal: Ecological Modelling - Volume 185, Issues 2â4, 10 July 2005, Pages 213-230
نویسندگان
Peter J. Weisberg, Francesco Bonavia, Harald Bugmann,