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Pathways and Determinants of Early spontaneous Vegetation succession.in Degraded Lowland of South China

Journal of Integrative Plant Biology 2008年第2期50卷 147-156页

作者： Wen-Jun Duan Hai Ren Sheng-Lei Fu Qin-Feng Guo Jun Wang Heshan Hilly Land Interdisciplinary Experimental Station South China Botanical Garden the Chinese Academy of Sciences Guangzhou 510650 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China USDA - Southern Research Station Asheville NC 28804 USA

Continuous and prolonged human disturbances have caused severe degradation of a large portion of lowland in South China, and how to restore such degraded ecosystems becomes an increasing concern. The process and mechanisms of spontaneous succession. which plays an important role in vegetation restoration, have not been adequately examined. To identify the pathways of early spontaneous vegetation succession. 41 plots representing plant communities abandoned over different times were established and investigated. The communities and indicator species of the vegetation were classified by analyzing the important values of plant species using multivariate analyses. The results indicated that the plant species could be classified into nine plant communities representing six succession.stages. The pathway and species composition also changed in the process of succession. We also measured 13 environmental variables of microtopography, soil structure and soil nutrition in each plot to examine the driving forces of succession.and the vegetation-environment relationships. Our results showed that the environmental variables changed in diverse directions, and that soil bulk density, soil water capacity and soil acidity were the most important factors.

关键词： degraded lowland ecological restoration soil spontaneous succession.

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Abandonment of croplands: problem or chance for grassland restoration? Case studies from Hungary

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Ecosystem Health and Sustainability 2016年第2期2卷 1-10页

作者： Orsolya Valkó Balázs Deák Péter Török András Kelemen Tamás Miglécz Katalin Tóth Béla Tóthmérész Department of Ecology University of DebrecenP.O.Box 71DebrecenH-4010 Hungary MTA-DE Biodiversity and Ecosystem Services Research Group Egyetem ter 1DebrecenH-4032 Hungary

In Central-and Eastern Europe,the collapse of socialist regimes resulted in a transformation of state-owned agricultural cooperatives to privately owned lands from the early 1990s *** socioeconomic processes resulted in landscape-scale changes in biodiversity,ecosystem services and agricultural *** parallel,large-scale abandonment of croplands,especially on sandy,salty or fre-quently inundated areas,became *** croplands are usually sensitive to species invasions,and are hotspots of noxious weeds,posing threats both to agriculture and nature *** restoration on former croplands can be an effective strategy for suppressing these ***,a common goal of nature conservation and agriculture can be the restoration of grasslands on former croplands to(1)suppress weed and/or invasive species in line with the EU policy“Good Farming Practices”,(2)support animal husbandry by creating meadows or pastures,and to(3)recover biodiversity and ecosystem *** the present paper we report“best practices”of grassland restoration projects from *** aim was to compare the effectiveness of spontaneous grassland recovery *** grassland restoration by seed sowing in terms of the recovery of biodiversity and ecosystem services,such as weed control and biomass *** results showed that grassland restoration on abandoned fields offers a viable solution for restoring biodiversity and ecosystem *** sowing ensures higher weed control and biomass pro-duction,but results in lower biodiversity compared to spontaneous *** restoration methods can be cost-effective,or even profitable even within a relatively short period of a nature conservation project.

关键词： agri-environmental schemes agri-environmental subsidy agrobiodiversity Central Europe intensive agriculture old-field seed sowing Special Feature:Ecosystem Management in Transition in Central and Eastern Europe spontaneous succession.

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