Arid
DOI10.1890/ES12-00411.1
Long-term insect herbivory slows soil development in an arid ecosystem
Classen, Aimee T.1; Chapman, Samantha K.2; Whitham, Thomas G.3,4; Hart, Stephen C.5,6; Koch, George W.3,4
通讯作者Classen, Aimee T.
来源期刊ECOSPHERE
ISSN2150-8925
出版年2013
卷号4期号:5
英文摘要

Although herbivores are well known to alter litter inputs and soil nutrient fluxes, their long-term influences on soil development are largely unknown because of the difficulty of detecting and attributing changes in carbon and nutrient pools against large background levels. The early phase of primary succession reduces this signal-to-noise problem, particularly in arid systems where individual plants can form islands of fertility. We used natural variation in tree-resistance to herbivory, and a 15 year herbivore-removal experiment in an Arizona pinon-juniper woodland that was established on cinder soils following a volcanic eruption, to quantify how herbivory shapes the development of soil carbon (C) and nitrogen (N) over 36-54 years (i.e., the ages of the trees used in our study). In this semi-arid ecosystem, trees are widely spaced on the landscape, which allows direct examination of herbivore impacts on the nutrient-poor cinder soils. Although chronic insect herbivory increased annual litterfall N per unit area by 50% in this woodland, it slowed annual tree-level soil C and N accumulation by 111% and 96%, respectively. Despite the reduction in soil C accumulation, short-term litterfall-C inputs and soil C-efflux rates per unit soil surface were not impacted by herbivory. Our results demonstrate that the effects of herbivores on soil C and N fluxes and soil C and N accumulation are not necessarily congruent: herbivores can increase N in litterfall, but over time their impact on plant growth and development can slow soil development. In sum, because herbivores slow tree growth, they slow soil development on the landscape.


英文关键词carbon cycling insect herbivory nitrogen cycling pine pinon-juniper woodland primary succession soil development
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000327308300001
WOS关键词MOUNT-ST-HELENS ; NITROGEN AVAILABILITY ; ENVIRONMENTAL-STRESS ; PRIMARY SUCCESSION ; PLANT-RESISTANCE ; CANOPY HERBIVORY ; SODA-LIME ; CARBON ; LITTER ; DECOMPOSITION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176784
作者单位1.Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA;
2.Villanova Univ, Dept Biol Sci, Villanova, PA 19085 USA;
3.No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86001 USA;
4.No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86001 USA;
5.Univ Calif, Sch Nat Sci, Merced, CA 95343 USA;
6.Sierra Nevada Res Inst, Merced, CA 95343 USA
推荐引用方式
GB/T 7714
Classen, Aimee T.,Chapman, Samantha K.,Whitham, Thomas G.,et al. Long-term insect herbivory slows soil development in an arid ecosystem[J],2013,4(5).
APA Classen, Aimee T.,Chapman, Samantha K.,Whitham, Thomas G.,Hart, Stephen C.,&Koch, George W..(2013).Long-term insect herbivory slows soil development in an arid ecosystem.ECOSPHERE,4(5).
MLA Classen, Aimee T.,et al."Long-term insect herbivory slows soil development in an arid ecosystem".ECOSPHERE 4.5(2013).
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