The detritus-based microbial-invertebrate food web contributes disproportionately to carbon and nitrogen cycling in the Arctic
The detritus-based microbial-invertebrate food web contributes disproportionately to carbon and nitrogen cycling in the Arctic
复制标题
以碎屑为基础的微生物-无脊椎动物食物网对北极的碳和氮循环做出了不成比例的贡献
DOI:
10.1007/s00300-017-2201-5
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发表时间:
2017
期刊:
影响因子:
1.7
通讯作者:
Moore, John C.
中科院分区:
文献类型:
--
作者:
Koltz, Amanda M.;Asmus, Ashley;Gough, Laura;Pressler, Yamina;Moore, John C.
The Arctic is the world’s largest reservoir of soil organic carbon and understanding biogeochemical cycling in this region is critical due to the potential feedbacks on climate. However, our knowledge of carbon (C) and nitrogen (N) cycling in the Arctic is incomplete, as studies have focused on plants, detritus, and microbes but largely ignored their consumers. Here we construct a comprehensive Arctic food web based on functional groups of microbes (e.g., bacteria and fungi), protozoa, and invertebrates (community hereafter referred to as the invertebrate food web) residing in the soil, on the soil surface and within the plant canopy from an area of moist acidic tundra in northern Alaska. We used an energetic food web modeling framework to estimate C flow through the food web and group-specific rates of C and N cycling. We found that 99.6% of C processed by the invertebrate food web is derived from detrital resources (aka ‘brown’ energy channel), while 0.06% comes from the consumption of live plants (aka ‘green’ energy channel). This pattern is primarily driven by fungi, fungivorous invertebrates, and their predators within the soil and surface-dwelling communities (aka the fungal energy channel). Similarly, >99% of direct invertebrate contributions to C and N cycling originate from soil- and surface-dwelling microbes and their immediate consumers. Our findings demonstrate that invertebrates from within the fungal energy channel are major drivers of C and N cycling and that changes to their structure and composition are likely to impact nutrient dynamics within tundra ecosystems.
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影响因子:
2.6
作者:
Helena Wirta;E. Vesterinen;P. Hambäck;E. Weingartner;C. Rasmussen;Jeroen Reneerkens;N. Schmidt;O. Gilg;T. Roslin
通讯作者:
T. Roslin
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Hódar
通讯作者:
J. Hódar
影响因子:
1.5
作者:
Shizuo Suzuki;K. Kitayama;Shin‐ichiro Aiba;Masaaki Takyu;K. Kikuzawa
通讯作者:
K. Kikuzawa
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
John C. Moore;Bradley B. Tripp;R. Simpson;D. C. Coleman
通讯作者:
D. C. Coleman
影响因子:
3.4
作者:
Birkhofer, Klaus;Wise, David H.;Scheu, Stefan
通讯作者:
Scheu, Stefan