Regeneration of Nothofagus dombeyi(Mirb.)Ørst.in little to moderately disturbed southern beech forests in the Andes of Patagonia(Argentina)  

作　　者：Stefan Zerbe Stefanie T.Storz Georg Leitinger Natalia Zoe Joelson JoséBava Steffi Heinrichs Christoph Leuschner Gabriel Loguercio Alois Simon María F.Urretavizcaya Helge Walentowski 

机构地区：[1]Faculty of Agricultural,Environmental and Food Sciences,Free University of Bozen-Bolzano,Bolzano,Italy [2]Department of Ecology,University of Innsbruck,Innsbruck,Austria [3]Faculty of Resource Management,HAWK University of Applied Sciences and Arts,Göttingen,Germany [4]Department of Plant Ecology and Ecosystem Research,Albrecht-von-Haller-Institute for Plant Sciences,University of Göttingen,Göttingen,Germany [5]Centro de Investigación y Extensión Forestal Andino Patagónico(CIEFAP),Esquel,Argentina [6]Department of Forest Planning,Tyrol Forest Administration,Office of the Tyrolean Government,Innsbruck,Austria

出　　处：《Forest Ecosystems》2023年第4期472-482,共11页森林生态系统（英文版）

基　　金：supported by funds of the Federal Ministry of Food and Agriculture (BMEL) based on a decision of the Parliament of the Federal Republic of Germany via the Federal Office for Agriculture and Food (BLE,grant No.281-042-01)

摘　　要：Natural forests and stands subjected to little to moderate human impact are continuously declining worldwide and with these,their biodiversity and ecosystem services.Many Nothofagus forests in the south of the South American continent are in a pristine state or only moderately impacted by humans.Forest grazing by livestock,in the past and still today often practiced in a non-sustainable way is,however,increasingly under discussion to meet current environmental and socio-economic challenges.Accordingly,we investigate the regeneration of Nothofagus dombeyi,a keystone species of the Patagonian Andes,in secondary forests in Argentinian northern Patagonia,particularly addressing the role of disturbance through grazing by livestock at various intensities.We test the hypothesis that the regeneration of this tree species is favored by grazing impact and,thus,disturbance of the herb layer and soil surface.In support of our hypothesis,Nothofagus dombeyi regeneration was significantly higher in terms of individuals and height classes in moderately grazed forests.Multivariate analysis shows significant positive effects of moderate grazing pressure,herb layer cover,and the occurrence of bare soil on the regeneration of Nothofagus dombeyi.Our results show that an integration of livestock grazing and forest regeneration is possible and that agroforestry systems can be an adequate management option for stakeholders in the region.A grazing management can also be part of a forest fire prevention strategy.However,the regeneration success and grazing pressure should be continuously monitored.

关 键 词：AGROFORESTRY Disturbance Fire management Forest grazing Forest management Plant traits 

分 类 号：S718.5[农业科学—林学]