Soil microbial activity and free-living nematode community in the upper soil layer of the anticline erosional cirque,Makhtesh Ramon,Israel |
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| Affiliation: | 1. The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Geha Road, Ramat-Gan 52900, Israel;2. Institute of Geology and Geophysics, Academy of Sciences, Tashkent 700041, Uzbekistan;3. Ramon Science Center, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, P.O. Box 194, Mizpeh Ramon 80600, Israel;1. College of Agriculture, Ibaraki University, 3-21-1 Ami, Ibaraki 300-0393, Japan;2. National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba 305-8604, Japan;1. Department of Entomology and Nematology, University of California Davis, One Shields Avenue, Davis, CA 95616, USA;2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China;3. Department of Plant Sciences, University of California Davis, One Shields Avenue, Davis, CA 95616, USA;1. School of Geography, Environment and Earth Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand;2. School of Environment, University of Auckland, Private Bag 92019, Auckland, New Zealand;3. Centre for Archaeological Science (CAS), School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia;4. Landcare Research, Lincoln, New Zealand |
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| Abstract: | The physical–chemical peculiarity of soil rock formations is one of the leading factors determining diversity and abundance of soil biota. The main aim of the present research was to study soil microbial and free-living nematode abundance and diversity on different soil rock formations (basalt, sandstone, limestone, granite and gypsum) of the Makhtesh Ramon erosional cirque. The obtained results showed the strong effect of soil features of different soil formations on microbial biomass and respiration as well as on the soil free-living nematode communities and its trophic and species composition. The Sorenson-Czenkanowski similarity index indicated significant differences between soil properties as well as between soil biota in observed soil formations. The qCO2, which is known to increase according to the level of environmental stress, reached maximal values in the sandstone soil formation. The values of ecological indices such as Simpson's dominance index, maturity index and modification and species richness pointed to a specific ecological condition in the studied soil formations dependent on low content of an essential soil matter as soil moisture, organic matter and cations. |
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