کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4502959 1320613 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Individualism in plant populations: Using stochastic differential equations to model individual neighbourhood-dependent plant growth
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Individualism in plant populations: Using stochastic differential equations to model individual neighbourhood-dependent plant growth
چکیده انگلیسی

We study individual plant growth and size hierarchy formation in an experimental population of Arabidopsis thaliana, within an integrated analysis that explicitly accounts for size-dependent growth, size- and space-dependent competition, and environmental stochasticity. It is shown that a Gompertz-type stochastic differential equation (SDE) model, involving asymmetric competition kernels and a stochastic term which decreases with the logarithm of plant weight, efficiently describes individual plant growth, competition, and variability in the studied population. The model is evaluated within a Bayesian framework and compared to its deterministic counterpart, and to several simplified stochastic models, using distributional validation. We show that stochasticity is an important determinant of size hierarchy and that SDE models outperform the deterministic model if and only if structural components of competition (asymmetry; size- and space-dependence) are accounted for. Implications of these results are discussed in the context of plant ecology and in more general modelling situations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical Population Biology - Volume 74, Issue 1, August 2008, Pages 74–83
نویسندگان
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