Land cover dynamics in Osa Region, Costa Rica: secondary forest is here to stay

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• 作者：Nur Algeet-Abarquero ; Arturo Sánchez-Azofeifa…
• 关键词：Land cover change ; Forest transition ; Secondary forest ; Deforestation ; Payments for environmental services (PES) ; Remote sensing
• 刊名：Regional Environmental Change
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：15
• 期：7
• 页码：1461-1472
• 全文大小：1,462 KB
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• 作者单位：Nur Algeet-Abarquero (1)
  Arturo Sánchez-Azofeifa (2)
  Javier Bonatti (3)
  Miguel Marchamalo (1)
  
  1. Departamento de ingeniería y morfología del terreno, Escuela de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, C/Profesor Aranguren s/n, 28040, Madrid, Spain
  2. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada
  3. Centro de Investigaciones en Ciencias Atómicas, Nucleares y Moleculares, Universidad de Costa Rica, San José, Costa Rica
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Geoecology and Natural Processes
  Geology
  Oceanography
  Geography
  Nature Conservation
  Regional Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1436-378X

文摘

Although high deforestation rates are documented in Latin America, there are also significant signs of secondary forest regrowth. In this study, we analyze the land cover dynamics in the Osa Peninsula region of Costa Rica between 1987 and 2009 that provides a good scenario for evaluating the effects over forest trends of the environmental policies set up in 1996. Remote sensing imagery from Landsat and SPOT 2 satellites was classified using the See5 algorithm to obtain land cover maps for 1987, 1998, 2003 and 2009. Our results show that land cover changes in Osa County are driven by grassland/forest dynamics. Forest area diminished over the 1987-998 period, whereas it increased by 5 and 6 % during the 1998-003 and 2003-009 periods, respectively. Grassland abandonment was identified as the main driver of the net increase in forest cover area. Fragmentation analysis was done over the forest class of these maps disclosing secondary forest of the persistent forest of each period. Persistent forest patches decrease in number, but increase in size through time, forming areas of persistent forest established in bigger patches with lower edge density. Secondary forest patches have increased in number and size, forming larger areas of forest established in bigger patches. Nearly half of the reforested area in the period 1987-009 remained as secondary forest in 2009, playing a key role by decreasing forest fragmentation and strengthening the natural corridor connecting the conservation areas of the region. Keywords Land cover change Forest transition Secondary forest Deforestation Payments for environmental services (PES) Remote sensing