Role of tardigrades in the suppressive service of a soil food web

被引：35

作者：

Sanchez-Moreno, Sara ^{[1
]}

Ferris, Howard ^{[1
]}

Guil, Noemi ^{[2
]}

机构：

[1] Univ Calif Davis, Dept Nematol, Davis, CA 95616 USA

[2] Harvard Univ, Dept Organism & Evolut Biol, Cambridge, MA 02138 USA

来源：

AGRICULTURE ECOSYSTEMS & ENVIRONMENT | 2008年 / 124卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

trophic interactions; soil food web; suppressiveness; nematodes; tardigrades;

D O I：

10.1016/j.agee.2007.09.011

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

fit a previous study, soil suppressiveness to populations of the plant-parasitic nematode Meloidogyne incognita was correlated with abundance of omnivore and predatory nematodes. In the current study, performance of the regulatory function switched from nematodes to tardigrades when predatory nematodes disappeared due to predation pressure and/or unfavorable environmental conditions. Two tardigrade species, Macrobiotus richtersi and M. harmsworthi effectively suppressed nematode populations. While there were significant changes in the soil food web over time, the regulatory function was maintained. Under experimental conditions, M. richtersi consumed 61 nematodes per day, indicating that tardigrades may significantly reduce nematode biomass. The impact of tardigrades on soil food web dynamics and their relationships with nematodes are discussed. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：187 / 192

页数：6

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