作者
Donald R Zak, David Tilman, Robert R Parmenter, Charles W Rice, Frederick M Fisher, James Vose, Daniel Milchunas, C Wayne Martin
发表日期
1994/12
期刊
Ecology
卷号
75
期号
8
页码范围
2333-2347
出版商
Ecological Society of America
简介
Annual C inputs from plant production in terrestrial ecosystems only meet the maintenance energy requirements of soil microorganisms, allowing for little or no net annual increase in their biomass. Because microbial growth within soil is limited by C availability, we reasoned that plant production should, in part, control the biomass of soil microorganisms. We also reasoned that soil texture should further modify the influence of plant production on soil C availability because fine—textured soils typically support more microbial biomass than coarse—textured soils. To test these ideas, we quantified the relationship between aboveground net primary production (ANPP) and soil microbial biomass in late—successional ecosystems distributed along a continent—wide gradient in North America. We also measured labile pools of C and N within the soil because they represent potential substrate for microbial activity …
引用总数
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