کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4372696 1303073 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Allometry, biocomplexity, and web topology of hundred agro-environments in The Netherlands
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Allometry, biocomplexity, and web topology of hundred agro-environments in The Netherlands
چکیده انگلیسی

For almost all soil organisms, the logarithm of numerical abundance (N) is inversely related to the logarithm of body mass (M). It is helpful to use allometry and food-web topology to condense environmental information. Using mathematical evidence derived from 99 real webs, a hypothesis is formulated to explain how belowground soil organisms become affected by increasing effects of animal manure and this is discussed in relation to soil productivity. As a matter of fact, the intercepts of allometric correlations change in a highly significant way according to aboveground grazing by mammals. Linear regressions of log10(N) values fitted against their log10(M) averages show allometric unity (slopes equal to −1) only in one fourth of the webs. Under different levels of taxonomic aggregation, our intercepts remain directly correlated with macroherbivory. Also after removal of bacteria from these real webs, intercepts of the linear regressions robustly fitted on the eukaryotes’ M and N reflect the local nitrogen availability from animal manure. Other basic web properties, such as trophic links and structural complexity, display a comparable pattern from nutrient-poor to nutrient-rich ecosystems, in contrast to a rather erratic connectance. Regardless of total soil biodiversity, only in 23 real webs a host of organisms ranging from earthworms and insects to bacterial cells seem to interact in ways beneficial to each other.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Complexity - Volume 3, Issue 3, September 2006, Pages 219–230
نویسندگان
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