Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geomorph.2011.04.041 |
Animal foraging as a mechanism for sediment movement and soil nutrient development: Evidence from the semi-arid Australian woodlands and the Chihuahuan Desert | |
Eldridge, David J.1; Koen, Terry B.2; Killgore, Aaron3; Huang, Niki1; Whitford, Walter G.4 | |
通讯作者 | Eldridge, David J. |
来源期刊 | GEOMORPHOLOGY |
ISSN | 0169-555X |
出版年 | 2012 |
卷号 | 157页码:131-141 |
英文摘要 | An emerging area of interest in geomorphology over the past two decades has been the effects of biota on ecosystem processes. We examined the roles of a range of vertebrates on soil disturbance in two markedly different environments, the semi-arid woodland of eastern Australia and a Chihuahuan Desert grassland-shrubland in the south-western United States. Foraging pits of soil-disturbing vertebrates varied markedly from small scratchings of heteromyid (mainly Dipodomys spp.) rodents (1.8 x 10(-4) m(3)) to deep (1.0 x 10(-2) m(3)) excavations of the burrowing bettong (Bettongia leuseur) and greater bilby (Macrotis lagotis). Vertebrates moved substantial volumes of soil in both environments, and activity was highly temporally and spatially variable. At large spatial scales, soil disturbance by echidnas (Tachyglossus aculeatus) and Gould’s sand goannas (Varanus gouldii) was substantially greater in communities dominated by shrubs, and where domestic livestock had been excluded. Heteromyid rodents tended to excavate more foraging pits in coarse-textured vegetation communities (both grasslands and shrublands). In both environments, foraging was concentrated close to perennial plants such as grass tussocks and tree canopies rather than in the interspaces. Foraging pits of Chihuahuan desert animals tended to be higher in labile carbon and support greater levels of infiltration, though this was plant community-dependent Overall our results indicate that animal foraging is an important geomorphic mechanism capable of mobilizing substantial volumes of soil in arid and semi-arid environments and with potential effects on soil function. (C) 2011 Elsevier B.V. All rights reserved. |
英文关键词 | Foraging Soil movement Biopedturbation Rodents Vertebrates Soil formation Patchiness Arid |
类型 | Article |
语种 | 英语 |
国家 | Australia ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000304898600012 |
WOS关键词 | NORTHERN POCKET GOPHER ; WESTERN MOJAVE DESERT ; HARVESTER ANT NESTS ; SUBTERRANEAN TERMITES ; NATIVE ANIMALS ; DISTURBANCE ; ECOSYSTEM ; RODENTS ; VEGETATION ; GRASSLAND |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172576 |
作者单位 | 1.Univ New S Wales, Evolut & Ecol Res Ctr, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia; 2.Dept Environm Climate Change & Water, Cowra, NSW 2794, Australia; 3.New Mexico State Univ, Dept Fishery & Wildlife Sci, Las Cruces, NM 88003 USA; 4.New Mexico State Univ, USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Eldridge, David J.,Koen, Terry B.,Killgore, Aaron,et al. Animal foraging as a mechanism for sediment movement and soil nutrient development: Evidence from the semi-arid Australian woodlands and the Chihuahuan Desert[J]. New Mexico State University,2012,157:131-141. |
APA | Eldridge, David J.,Koen, Terry B.,Killgore, Aaron,Huang, Niki,&Whitford, Walter G..(2012).Animal foraging as a mechanism for sediment movement and soil nutrient development: Evidence from the semi-arid Australian woodlands and the Chihuahuan Desert.GEOMORPHOLOGY,157,131-141. |
MLA | Eldridge, David J.,et al."Animal foraging as a mechanism for sediment movement and soil nutrient development: Evidence from the semi-arid Australian woodlands and the Chihuahuan Desert".GEOMORPHOLOGY 157(2012):131-141. |
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