Impacts of elevated CO2 and O3 on aspen leaf litter chemistry and earthworm and springtail productivity

被引：20

作者：

Meehan, Timothy D. ^{[1
]}

Crossley, Michael S. ^{[1
]}

Lindroth, Richard L. ^{[1
]}

机构：

[1] Univ Wisconsin, Great Lakes Bioenergy Res Ctr, Dept Entomol, Madison, WI 53706 USA

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 2010年 / 42卷 / 07期

关键词：

Aspen; Carbon dioxide; Collembola; Decomposition; Earthworm; Growth; Leaf litter; Ozone; Soil; TROPOSPHERIC O-3; ATMOSPHERIC CO2; TREMBLING ASPEN; DECOMPOSITION; COLLEMBOLA; CARBON; INVASION; NITROGEN; QUALITY; CONSEQUENCES;

D O I：

10.1016/j.soilbio.2010.03.019

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Human alteration of atmospheric composition affects foliar chemistry and has possible implications for the structure and functioning of detrital communities. In this study, we explored the impacts of elevated carbon dioxide and ozone on aspen (Populus tremuloides) leaf litter chemistry, earthworm (Lumbricus terrestris) individual consumption and growth, and springtail (Sinella curviseta) population growth. We found that elevated carbon dioxide reduced nitrogen and increased condensed-tannin concentrations in leaf litter. These changes were associated with decreases in earthworm individual growth, earthworm growth efficiency, and springtail population growth. Elevated ozone increased fiber and lignin concentrations of leaf litter. These changes were not associated with earthworm consumption or growth, but were associated with increased springtail population growth. Our results suggest that changes in litter chemistry caused by increased carbon dioxide concentrations will have negative impacts on the productivity of diverse detritivore taxa, whereas those caused by increased ozone concentrations will have variable, taxon-specific effects. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1132 / 1137

页数：6

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