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Science China Life Sciences

, Volume 57, Issue 7, pp 718–725

First Online: 07 June 2014Received: 27 September 2013Accepted: 15 November 2013DOI: 10.1007-s11427-014-4681-7

Cite this article as: Shi, P., Hui, C., Men, X.
et al.
Sci.
China Life Sci.
2014 57: 718.
doi:10.1007-s11427-014-4681-7

Abstract

Understanding how plant species richness influences the diversity of herbivorous and predatory-parasitic arthropods is central to community ecology.
We explore the effects of crop species richness on the diversity of pest insects and their natural enemies.
Using data from a four-year experiment with five levels of crop species richness, we found that crop species richness significantly affected the pest species richness, but there were no significant effects on richness of the pests’ natural enemies.
In contrast, the species richness of pest insects significantly affected their natural enemies.
These findings suggest a cascade effect where trophic interactions are strong between adjacent trophic levels, while the interactions between connected but nonadjacent trophic levels are weakened by the intermediate trophic level.
High crop species richness resulted in a more stable arthropod community compared with communities in monoculture crops.
Our results highlight the complicated cross-trophic interactions and the crucial role of crop diversity in the food webs of agro-ecosystems.

Keywordstrophic level stability generalized additive model monoculture polyculture This article is published with open access at link.springer.com

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Autor: PeiJian Shi - Cang Hui - XingYuan Men - ZiHua Zhao - Fang Ouyang - Feng Ge - XianShi Jin - HaiFeng Cao - B. Larry Li

Fuente: https://link.springer.com/



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