Arid
DOI10.2307/1552128
Distribution, community structure, and microhabitats of soil invertebrates along an elevational gradient in Taylor Valley, Antarctica
Powers, LE; Ho, MC; Freckman, DW; Virginia, RA
通讯作者Powers, LE
来源期刊ARCTIC AND ALPINE RESEARCH
ISSN0004-0851
出版年1998
卷号30期号:2页码:133-141
英文摘要

Soils in the Antarctic Dry Valleys have been significantly influenced by soil formation factors such as parent material, climate, and topography. Factors common in more temperate zones, including chemical weathering and leaching of minerals, occur to a much lesser extent in these cold arid soils, leading to an accumulation of salts and bases, which will likely affect the distribution of soil biota. Since the intensity of these factors may vary with topography, this study examined the soil properties and soil invertebrate communities along an elevational gradient in Taylor Valley, Antarctica. We sampled from two spatial scales (1 X 1 m and 10 X 10 m) at three sites (83, 121, and 188 m a.s.l) on the south side of Lake Hoare in Taylor Valley, and examined soil moisture, nitrogen, carbon, pH, and electrical conductivity (which provides an estimation of soil salinity), as well as the distribution and community structure of soil invertebrates. We found significant differences in soil properties with elevation, along with associated differences in soil communities. Biodiversity was greatest at the lowest elevation, closest to the shore of Lake Hoare, where soil moisture, carbon, and nitrogen were highest, and salinity was lowest. Scottnema lindsayae dominated the nematode communities found at all sites. Electrical conductivity was higher and carbon and nitrogen contents were lower at the upper elevations. The distribution of both Eudorylaimus and Plectus appeared to be influenced by soil moisture; electrical conductivity affected the mortality of all three nematode genera found. Soil properties did differ with sampling scale, suggesting that changes in microhabitats not detected at sampling intervals of a meter or more may be more reliably detected by sampling at a smaller scale.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000073952600005
WOS关键词DESERT ECOSYSTEM ; COLD-HARDINESS ; NEMATODES ; DIVERSITY ; WATER
WOS类目Environmental Sciences ; Geography
WOS研究方向Environmental Sciences & Ecology ; Geography
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/135362
作者单位(1)Eastern Mennonite Univ, Dept Biol, Harrisonburg, VA 22802 USA;(2)Harvard Univ, Sch Publ Hlth, Boston, MA 02115 USA;(3)Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA;(4)Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA
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Powers, LE,Ho, MC,Freckman, DW,et al. Distribution, community structure, and microhabitats of soil invertebrates along an elevational gradient in Taylor Valley, Antarctica[J]. Colorado State University,1998,30(2):133-141.
APA Powers, LE,Ho, MC,Freckman, DW,&Virginia, RA.(1998).Distribution, community structure, and microhabitats of soil invertebrates along an elevational gradient in Taylor Valley, Antarctica.ARCTIC AND ALPINE RESEARCH,30(2),133-141.
MLA Powers, LE,et al."Distribution, community structure, and microhabitats of soil invertebrates along an elevational gradient in Taylor Valley, Antarctica".ARCTIC AND ALPINE RESEARCH 30.2(1998):133-141.
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