کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4498607 | 1318991 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Patterns of vegetation biodiversity: The roles of dispersal directionality and river network structure
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Patterns of vegetation biodiversity: The roles of dispersal directionality and river network structure Patterns of vegetation biodiversity: The roles of dispersal directionality and river network structure](/preview/png/4498607.png)
چکیده انگلیسی
This paper investigates the importance of dispersal directionality and river network structure to biodiversity patterns. Our model results suggest that dispersal directionality plays a crucial role in determining biodiversity patterns, even more so than dispersal rates. Dispersal directionality heterogenizes the spatial distribution of abundance, which results in higher extinction rates of rare species and higher β diversity. It induces a few species with very high abundances at the expense of many species with intermediate abundances, thereby lowering α and γ diversities. The river network structure also increases β diversity, i.e., more heterogeneous ecosystems, in comparison to typical two-dimensional landscapes. We find that the interplay between the dispersal directionality and network topology has important consequences on relative species abundance patterns and the distribution of α diversity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Theoretical Biology - Volume 252, Issue 2, 21 May 2008, Pages 221-229
Journal: Journal of Theoretical Biology - Volume 252, Issue 2, 21 May 2008, Pages 221-229
نویسندگان
Rachata Muneepeerakul, Enrico Bertuzzo, Andrea Rinaldo, Ignacio Rodriguez-Iturbe,