Trees support functional soils in a dryland agricultural area  

作　　者：Jingyi Ding David J.Eldridge 

机构地区：[1]State Key Laboratory of Earth Surface Processes and Resource Ecology,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China [2]Centre for Ecosystem Science,School of Biological,Earth and Environmental Sciences,University of New South Wales,Sydney,New South Wales 2052,Australia

出　　处：《Geography and Sustainability》2024年第4期588-596,共9页地理学与可持续性（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities of China and David Eldridge by the Hermon Slade Foundation.

摘　　要：Trees provide multiple ecosystem services such as carbon sequestration,hydrological regulation and habitat for arboreal animals.However,they are often removed to support agricultural enterprises.Despite the importance of tree remnants,we know relatively little about how soils differ across sites of varying condition.Here,we describe a study where we examined the relative effects of trees,compared with unvegetated interspaces,on soil functions in remnant patches at sites in good and poor condition in two eucalypt communities in an irrigation area in eastern Australia.We found that,in general,carbon and nutrient cycling were relatively greater beneath trees,and in surface soils,but there were no clear trends in relation to site condition.The values of most soil attributes(e.g.,soluble and exchangeable cations,nitrogen,phosphorus)were greater beneath trees,indicating strong fertile island effects in both communities.Overall,our study confirms the importance of trees in remnant patches in agricultural landscapes,particularly those in sites of poor condition.It also suggests that soil processes may still be relatively intact,even in sites in poor condition.Our study reinforces the need to protect trees in remnant woodland reserves to maintain critical ecosystem functions related to nutrient retention.These remnants are important for achieving sustainable management of agricultural systems.

关 键 词：CONDITION EUCALYPTUS Fertile islands Soil function Trees WOODLANDS 

分 类 号：F323.211[经济管理—产业经济]