Reduced feeding activity of soil detritivores under warmer and drier conditions.

Reduced feeding activity of soil detritivores under warmer and drier conditions.
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在温暖和较干燥的条件下,土壤下降的饲喂活性降低。

DOI:
10.1038/s41558-017-0032-6
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发表时间:
2018-01
影响因子:
30.7
通讯作者:
Eisenhauer N
Eisenhauer N
中科院分区:
地球科学1区
文献类型:
--
作者:
Thakur MP;Reich PB;Hobbie SE;Stefanski A;Rich R;Rice KE;Eddy WC;Eisenhauer N

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人为变暖预计将通过增加土壤中的碳损失来引发对气候的正反馈。虽然这种损失的部分原因是无脊椎动物对有机物的分解增加,但尚不清楚更多的摄食活动将如何随着变暖而变化,特别是在干旱条件下。在这里,通过在两个北美北部森林中进行的四年操纵实验,我们研究了温度(环境温度,+1.7℃,+3.4℃)和降雨量(环境,夏季降水的-40%)扰动如何影响有害的捕食活动。与普遍预期相反,气候变暖对周围降水中更多的觅食活动产生的净影响可以忽略不计。然而,当结合降雨量减少时,变暖使摄食活动减少了约14%。在所有的样地和日期中,更多的取食活动与土壤微生物呼吸呈正相关,我们的结果表明,在人为气候变化下,土壤有机质的分解速度较慢,从而减少了对气候的正反馈。
Anthropogenic warming is projected to trigger positive feedbacks to climate by enhancing carbon losses from the soil. While such losses are, in part, owing to increased decomposition of organic matter by invertebrate detritivores, it is unknown how detritivore feeding activity will change with warming, especially under drought conditions. Here, using four year manipulation experiments in two North American boreal forests, we investigate how temperature (ambient, +1.7 °C, +3.4 °C) and rainfall (ambient, -40% summer precipitation) perturbations influence detritivore feeding activity. In contrast to general expectations, warming had negligible net effects on detritivore feeding activity at ambient precipitation. However, when combined with precipitation reductions, warming decreased feeding activity by ~14%. As across all plots and dates, detritivore feeding activity was positively associated to bulk soil microbial respiration, our results suggest slower rates of decomposition of soil organic matter, and thus reduced positive feedbacks to climate under anthropogenic climate change.
DOI: 10.1038/srep06890
发表时间: 2014-11-03
期刊: Scientific reports
影响因子: 4.6
作者:
Eisenhauer N;Stefanski A;Fisichelli NA;Rice K;Rich R;Reich PB
通讯作者: Reich PB
DOI: 10.1038/nclimate2361
发表时间: 2014-10-01
影响因子: 30.7
作者:
Hagerty, Shannon B.;van Groenigen, Kees Jan;Dijkstra, Paul
通讯作者: Dijkstra, Paul
DOI: 10.1016/j.apsoil.2014.05.008
发表时间: 2014-10-01
影响因子: 4.8
作者:
Eisenhauer, Nico;Wirsch, Daniela;Steinauer, Katja
通讯作者: Steinauer, Katja
DOI: 10.1111/j.1365-2486.2008.01716.x
发表时间: 2008-12-01
影响因子: 11.6
作者:
Allison, Steven D.;Treseder, Kathleen K.
通讯作者: Treseder, Kathleen K.
DOI: 10.1038/nature08930
发表时间: 2010-03-25
期刊: NATURE
影响因子: 64.8
作者:
Bond-Lamberty, Ben;Thomson, Allison
通讯作者: Thomson, Allison