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The Impact of Animal Trampling on Free-living Nematode Abundance,Genera,and Trophic Diversity was Attenuated by Tree Canopies

作     者:Stanislav Pen-Mouratov Roi Meller Rentao Liu Yosef Steinberger 

作者机构:The Mina and Everard Goodman Faculty of Life SciencesBar-Ilan UniversityRamat-Gan 5290002Israel The School of ZoologyGeorge S.Wise Faculty of Life Sciencesand The Steinhardt Museum of Natural HistoryIsrael National Center for Biodiversity StudiesTel Aviv UniversityTel Aviv6997801Israel Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of EducationNingxia UniversityYinchuan 750021China 

出 版 物:《Journal of Life Sciences》 (生命科学(英文版))

年 卷 期:2019年第13卷第1期

页      面:12-33页

学科分类:09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

主  题:Grazing soil disturbances environmental factors biological indicators ecological index 

摘      要:Livestock grazing and trampling is an important factor in the formation and development of different terrestrial ***,despite numerous studies on soil compaction,there is still no consensus as to which kind of effect(positive or negative)animal trampling exerts on soil *** main goal of this study was to evaluate the animal trampling effect on free-living nematode abundance and diversity,and to define the attenuating effect of the tree canopies(Cupressus sempervirens,Eucalyptus camaldulensis,and Tamarix aphylla)during wet and dry *** nematodes were extracted from 100 g aliquots of soil samples(brown-red sandy soils)during cold-wet(CW),warm-wet(WW),and hot-dry(HD)periods during 2013-2014,in a man-made safari-zoo habitat,using the Baermann funnel *** results revealed the impact of trampling on both free-living nematode abundance and diversity,and their soil *** was found that trampling,along with seasonal fluctuation and the tree-species attenuating effect on the soil medium,resulted in the creation of the spatial-temporal heterogeneity of soil properties in the study *** turn,variation in soil properties was reflected in soil nematode abundance and diversity,revealing tight correlation with the observed soil *** trampling had an overwhelming,mostly negative impact on soil nematode abundance,genera,and trophic diversity in the open,bare ***,the protective effect of the tree canopies,as well as seasonal fluctuations,attenuated this negative *** trees had a significant attenuating effect on trampling compared with the open,bare ***,different tree species during the wet and dry periods had a variable impact on nematode abundance,genera,and trophic *** the hottest period of the year,when external adverse factors dominated the trampling effect,the ability of the trees to protect nematode communities was significantly *** all the colonizer-persister(cp)continuum of

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