Incorporation of local and neighborhood trophic cascades highly determine ecosystem function along a nitrogen subsidy gradient
文献类型： 外文期刊
作者： Gu, Shimin 1 ; Zalucki, Myron P. 3 ; Ouyang, Fang 2 ; Ge, Feng 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Plant Protect, Shandong Prov Key Lab Plant Virol, Jinan 250100, Peoples R China
2.Chinese Acad Sci, Inst Zool, State Key Lab Integrated Management Pest Insects &, Beijing 100101, Peoples R China
3.Univ Queensland, Sch Biol Sci, Brisbane 4072, Australia
关键词： Ecological subsidy; ecosystem function; land use intensification; pest control; trophic cascades
期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：6.608； 五年影响因子：4.803 ）
ISSN： 0171-8177
年卷期： 2022 年 42 卷 6 期
页码：
收录情况： SCI
摘要： The spatial distribution of an ecological subsidy can change local trophic cascades and create differences among locations; however, its contribution to shaping large-scale ecosystem functions is less well known. Here, using a multi-scale hierarchical design along a nitrogen input gradient, we assessed both local (within field level) and neighborhood (inter-field level) differences in soil nutrients and plant-arthropod communities to explain variation in landscape-scale crop productivity and biocontrol service. We found that the average importance of neighborhood factors increased, approached and even exceeded local factors in explaining the variance in the predator-to-aphid abundance ratio, wheat yield and parasitism rate. Compared to models with only local factors, both local and neighborhood factors when integrated into linear models explained an extra 67% and 18% of the variation in wheat yield and parasitism rate, respectively. Preserving the abundance and variability of biological resources on a specific spatial scale using targeted nitrogen subsidies may be a promising strategy for sustaining multiple ecosystem functions under intensified land use.
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