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Ecological connectivity in fragmented agricultural landscapes and the importance of scattered trees and small patches

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Ecological Processes 2021年第1期10卷 274-289页

作者： Darrel Chin Fung Tiang Andrew Morris Mathew Bell christopher ngibbins Badrul Azhar Alex MLechner School of Environmental and Geographical Sciences University of Nottingham MalaysiaJalan Broga43500 SemenyihSelangorMalaysia MidCoast Council 2 Biripi WayTareeNSW 2430Australia Faculty of Forestry&Environment Universiti Putra Malaysia43400 SerdangSelangorMalaysia Lincoln Centre for Water and Planetary Health School of GeographyUniversity of LincolnLincoln LN67TSUK

Background:Fragmentation and habitat loss can restrict species movement and reduce connectivity,negatively impacting *** the overall connectivity of an area can inform better management of human modified *** connectivity modelling methods seldom incorporate fine-scale movement patterns associated with movement between fine-scaled structural connectivity elements such as scattered trees,roadside corridors and small patches of *** study aims to characterise connectivity within the Karuah-Myall catchments,a typical woodland ecosystem that is fragmented by agriculture,using least-cost path analysis and a graph-theoretic approach;it focuses on how fine-scaled vegetation such as scattered trees support *** mapped scattered(and paddock)trees within this agricultural landscape where the main human modified land use was *** modelled connectivity for a general representative woodland species using an interpatch dispersal distance and gap crossing threshold,and resistance from different land cover *** gap crossing distance threshold was used to model movement between fine-scaled vegetation *** compared the least-cost paths modelled with and without scattered ***:Our results show that by excluding scattered trees,least-cost paths across the cleared pasture landscape did not reflect the types of movement patterns typically observed from field studies,such as those associated with a foray-search strategy used by small and medium mammals and *** modelling also shows that the KaruahMyall catchments are well connected and provide value to biodiversity beyond the catchment borders,by connecting coastal vegetation to the Great Eastern Ranges national wildlife corridor ***:Connectivity models that exclude fine-scale landscape features such as scattered trees and small,linear patches risk misrepresenting connectivity *** of regional-scale connectivity can b

关键词： Scattered trees Landscape connectivity Gap crossing Fragmentation Agricultural landscape

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