Dead shrub patches as ecosystem engineers in degraded drylands

作     者：Ilan STAVI Eli ZAADY Alexander GUSAROV Hezi YIZHAQ Ilan STAVI;Eli ZAADY;Alexander GUSAROV;Hezi YIZHAQ

作者机构：Dead Sea and Arava Science CenterYotvata 88820Israel Eilat CampusBen-Gurion University of the NegevEilat 88100Israel Department of Natural ResourcesAgricultural Research OrganizationGilat Research Center85280 NegevIsrael Department of Solar Energy and Environmental PhysicsBlaustein Institutes for Desert ResearchBen-Gurion University of the NegevSede Boqer Campus 84990Israel 

基　　金：funded by the Israel Science Foundation(ISF) grant number 1260/15 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2021年第31卷第8期

页      码：1187-1204页

摘      要：A long-term drought has led to the mass mortality of shrubs in the semi-arid Israeli *** most impacted shrub species is the Noaea mucronata(Forssk.)*** *** a four-year study,we found that herbaceous vegetation growth was greater in the dead shrub patches than in the surrounding inter-patch biocrusted spaces,suggesting that the dead shrub patches encompass improved ***,unexpectedly,the soil moisture in the dead shrub patches was consistently lower than that of the inter-patch biocrusted *** the same time,soil quality in the dead shrub patches was higher than that in the inter-patch ***,it seems that the overall better soil conditions in the dead patches overcome the scarcity of soil-water,supporting increased herbaceous *** explaining the discrepancy between herbaceous vegetation and soil-water,we formulated a conceptual framework,which highlights the key factors that regulate soil-water dynamics in this dryland *** demonstrate that herbaceous vegetation is facilitated in the dead shrub patches by a legacy effect that takes place long after the shrubs have *** dead shrub patches encompass a unique form of ecosystem *** study highlights the complex and unpredicted impacts of prolonged droughts on dryland ecosystems.

主 题 词：allogenic ecosystem engineers climate change legacy mechanism patchy vegetation small-scale geodiversity vegetation transition 

学科分类：07[理学] 09[农学] 0903[农学-动物生产类] 0713[0713] 

核心收录：

D　O　I：10.1007/s11442-021-1892-2

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