基于遥感数据量化黄河三角洲刺槐林的边缘效应

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中图分类号：S727 文献标志码：A 文章编号：1000-2006（2025）06-0037-10

Abstract：【Objective]The edge efect refers to the phenomenon that some components within the ecosystems change significantlydue tothediferencesandinteractionsofecological factorsatthejunctionofdiferentecosystems.This phenomenon isubiquitouslyobservedacross diverse ecosystemsincluding forests，wetlandsand grasslands.The investigationofforest edge efects holdssubstantial importance foradvancing ecological conservationeforts，enhancing forestry management practices，addressng climate change impacts，and refining carbon storageestimations.【Method】 This studyquantified edge effcts in Robinia pseudoacacia plantations in theYellow Riverdelta using UAV-LiDARand Sentinel-2data.Seven structuralandthreephysiological indiceswereanalyzedtoassess3Dstructuralandecological functional variations，with distinctedgeefect pattrns identifiedacross differentedge types.【Result】（1）Theedge effect significantlyaltered vegetationstructural parameters，withobserved reductionsof1-5mintree height， 7%-53% （204号 invegetation coverage， 10%-77% in leaf area index（LAI），and 6%-52% in tree density. Canopy structural features， includingprojectedareaandvolume，alsoexhibitedmarked decreases.（2）Ecological functionsweresubstantially compromised at forest edges，manifested by impaired photosynthetic capacity with 8%-50% reduction in fraction of absorbed photosyntheticallyactive radiation（FAPAR）， 9%-72% decline in chlorophyll content，and 8%-50% （204号 decrease incanopy watercontent.（3）Edge influencezonesshowed distinct spatial paterns，with riveredges demonstratinganextensive impactrangeof15O meters，contrasting with therelatively limited 30-meterinfluence zoneof road edges.【Conclusion】Theedge effect exertsmultidimensional influences on both structural characteristicsand ecosystemfunctionalitiesofcoastalshelterbeltsintheYelowRiverDelta.Thisresearchprovidescritical insightsfor enhancing coastal shelterbelt managementandconservation strategies，facilitating theoptimizationofsustainableforest plantation development，and contributing to climatechange mitigationand regional environmentalrestorationefforts.

Keywords：coastal shelter forest；Robinia pseudoacacia plantation;edge effect；vegetation structure；ecosystem function; YellowRiver delta

边缘效应是指在不同生态系统交互作用处，由于物质、能量、信息等生态因子或系统属性的差异与协同作用，导致某些组分（如种群密度、生产力和多样性等）与系统内部不同的现象[1]。（剩余20106字）