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以色列阿拉瓦谷内盖夫沙漠中的土壤生物区
引用本文:S. PEN-MOURATOV,T. MYBLAT,I. SHAMIR,G. BARNESS,Y. STEINBERGER. 以色列阿拉瓦谷内盖夫沙漠中的土壤生物区[J]. 土壤圈, 2010, 20(3): 273-284. DOI: 10.1016/S1002-0160(10)60015-X
作者姓名:S. PEN-MOURATOV  T. MYBLAT  I. SHAMIR  G. BARNESS  Y. STEINBERGER
作者单位:The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel)
基金项目:*1Supported by the National Natural Science Foundation of China (Nos. 40771095, 40725010, and 41030746) and the Water Conservancy Science & Technology Foundation of Qingdao City, China (No. 2006-003).
摘    要:Soil microorganism biomass and respiration and the soil nematode community were observed in the hypersaline desert valley that is found between the Dead Sea and the Red Sea. The lowest point of the valley is approximately 400 m below sea level, and is the lowest point on earth. Soil samples (n = 72) were collected from the 0-10 and 10-20 cm soil layers at different altitudes (from -400 to +100 m) in the open spaces between plants during one of the most extreme xeric periods. Both soil microbial respiration ...

关 键 词:土壤线虫  土壤微生物生物量  沙漠  生物群  以色列  拉瓦  呼吸作用  土壤水分
收稿时间:2009-11-18

Soil biota in the Arava Valley of Negev Desert, Israel
S. PEN-MOURATOV,T. MYBLAT,I. SHAMIR,G. BARNESS and Y. STEINBERGER. Soil biota in the Arava Valley of Negev Desert, Israel[J]. Pedosphere, 2010, 20(3): 273-284. DOI: 10.1016/S1002-0160(10)60015-X
Authors:S. PEN-MOURATOV  T. MYBLAT  I. SHAMIR  G. BARNESS  Y. STEINBERGER
Affiliation:The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel);The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel);The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel);The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel);The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900 (Israel)
Abstract:Soil microorganism biomass and respiration and the soil nematode community were observed in the hypersaline desert valley that is found between the Dead Sea and the Red Sea. The lowest point of the valley is approximately 400 m below sea level, and is the lowest point on earth. Soil samples (n = 72) were collected from the 0--10 cm and 10--20 cm soil layers at different altitudes (from -400 to +100 m) in the open spaces between plants during one of the most extreme xeric periods. Both soil microbial respiration and microbial biomass were found to be negatively dependent on soil moisture (SM) and organic matter (OM), and positively dependent on pH values. The physical-chemical characteristics of this hypersaline area were extremely unfavorable for the soil nematode communities, and the nematodes were entirely absent in the open area below sea level. The bacterivores were found to be the most resistant nematodes in this hyperarid region, with the Wilsonema being the most widespread genus. We suggest that nitrogen availability may play a crucial role in the below-ground soil interaction in this region, with bacterivore nematodes as indicators of nitrogen availability.
Keywords:Dead Sea   microbial biomass   nematode community   respiration   trophic groups
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