| 地貌演替序列特征对土壤生物群动态的季节效应 |
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| 作者姓名： | S. PEN-MOURATOV N. GENZER N. SHUKUROV J. PLAKHT Y. STEINBERGER |
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| 作者单位： | S.PEN-MOURATOV,N.GENZER,Y.STEINBERGER(The Mina & Everard Goodman Faculty of Life Sciences,Bar-Ilan University,Ramat-Gan 55900(Israel));N.SHUKUROV(The Mina & Everard Goodman Faculty of Life Sciences,Bar-Ilan University,Ramat-Gan 55900(Israel);Institute of Geology and Geophysics,Academy of Sciences,Tashkent 700041(Uzbekistan));J.PLAKHT(Ramon Science Center,Jacob Blaustein Institute for Desert Research,Ben-Gurion University of the Negev,P.O.Box194,Mizpeh Ramon 80600(Israel)) |
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| 摘 要： | Numerous studies have been devoted to the physical-chemical weathering processes leading to the creation of unique soil formations having their own history that induce soil-biotic diversity. However, the extent to which unique geomorphic formations influence soil biotic seasonal variation is not clear. Our aim was to define seasonal variations of soil biota in soils of different-aged terraces of the Makhtesh Ramon anticline erosional cirque in southern Israel. The strong effect of Makhtesh Ramon (Ramon Crater) erosional fluvial terrace age initiated by climatic changes during the Late Pleistocene–Early Holocene period on seasonal variations in both soil properties and the abundance and composition of soil biota were demonstrated. However, age dependence was not constant and values for observed soil properties and microbial activity were negligible between younger and older terraces for certain seasons, while free-living nematodes along with bacteria-feeding group were strongly dependent on the geomorphic features of the ages throughout the study period.
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| 关 键 词： | geomorphic formation Makhtesh Ramon microbial biomass nematode community trophic group |
| 收稿时间： | 14 April 2010 |
Seasonal effect of geomor-phological chronosequence features on soil biota dynamics |
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| S. PEN-MOURATOV,N. GENZER,N. SHUKUROV,J. PLAKHT,Y. STEINBERGER.Seasonal effect of geomor-phological chronosequence features on soil biota dynamics[J].Pedosphere,2010,20(6):761-770. |
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| Authors: | S PEN-MOURATOV N GENZER N SHUKUROV J PLAKHT and Y STEINBERGER |
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| Institution: | Harvard Forest, Faculty of Arts and Sciences, Harvard University, 324 North Main Street, Petersham, MA 01366-9504 (USA);Laboratory of Science, Division of Environmental Resources, Graduate School of Agriculture Hokkaido University, Sapporo, Hokkaido 060-8589 (Japan);Department of Geosciences, School of Environmental Sciences, Faculty of Science, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth 6031 (South Africa) |
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| Abstract: | Numerous studies have been devoted to the physical-chemical weathering processes leading to the creation of unique soil formations having their own history that induce soil-biotic diversity. However, the extent to which unique geomorphic formations influence soil biotic seasonal variation is not clear. Our aim was to define seasonal variations of soil biota in soils of different-aged terraces of the Makhtesh Ramon anticline erosional cirque in southern Israel. The strong effect of Makhtesh Ramon (Ramon crater) erosional fluvial terrace age initiated by climatic changes during the Late Pleistocene-Early Holocene period on seasonal variations in both soil properties and the abundance and composition of soil biota were demonstrated. However, age dependence was not constant and values for observed soil properties and microbial activity were negligible between younger and older terraces for certain seasons, while free-living nematodes along with bacterial-feeding group were strongly dependent on the geomorphic features of the ages throughout the study period. |
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| Keywords: | air-filled porosity gas diffusion coefficient pore tortuosity factor pore space indices soil bulk density |
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