Patterns of loss and regeneration of tropical dry forest in Madagascar: the social institutional context
Loss of tropical forests and changes in land-use/land-cover are of growing concern worldwide. Although knowledge exists about the institutional context in which tropical forest loss is embedded, little is known about the role of social institutions in influencing regeneration of tropical forests. In...
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| description | Loss of tropical forests and changes in land-use/land-cover are of growing concern worldwide. Although knowledge exists about the institutional context in which tropical forest loss is embedded, little is known about the role of social institutions in influencing regeneration of tropical forests. In the present study we used Landsat images from southern Madagascar from three different years (1984, 1993 and 2000) and covering 5500 km(2), and made a time-series analysis of three distinct large-scale patterns: 1) loss of forest cover, 2) increased forest cover, and 3) stable forest cover. Institutional characteristics underlying these three patterns were analyzed, testing the hypothesis that forest cover change is a function of strength and enforcement of local social institutions. The results showed a minor decrease of 7% total forest cover in the study area during the whole period 1984-2000, but an overall net increase of 4% during the period 1993-2000. The highest loss of forest cover occurred in a low human population density area with long distances to markets, while a stable forest cover occurred in the area with highest population density and good market access. Analyses of institutions revealed that loss of forest cover occurred mainly in areas characterized by insecure property rights, while areas with well-defined property rights showed either regenerating or stable forest cover. The results thus corroborate our hypothesis. The large-scale spontaneous regeneration dominated by native endemic species appears to be a result of a combination of changes in precipitation, migration and decreased human population and livestock grazing pressure, but under conditions of maintained and well-defined property rights. Our study emphasizes the large capacity of a semi-arid system to spontaneously regenerate, triggered by decreased pressures, but where existing social institutions mitigate other drivers of deforestation and alternative land-use. |
| doi_str_mv | 10.1371/journal.pone.0000402 |
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Although knowledge exists about the institutional context in which tropical forest loss is embedded, little is known about the role of social institutions in influencing regeneration of tropical forests. In the present study we used Landsat images from southern Madagascar from three different years (1984, 1993 and 2000) and covering 5500 km(2), and made a time-series analysis of three distinct large-scale patterns: 1) loss of forest cover, 2) increased forest cover, and 3) stable forest cover. Institutional characteristics underlying these three patterns were analyzed, testing the hypothesis that forest cover change is a function of strength and enforcement of local social institutions. The results showed a minor decrease of 7% total forest cover in the study area during the whole period 1984-2000, but an overall net increase of 4% during the period 1993-2000. The highest loss of forest cover occurred in a low human population density area with long distances to markets, while a stable forest cover occurred in the area with highest population density and good market access. Analyses of institutions revealed that loss of forest cover occurred mainly in areas characterized by insecure property rights, while areas with well-defined property rights showed either regenerating or stable forest cover. The results thus corroborate our hypothesis. The large-scale spontaneous regeneration dominated by native endemic species appears to be a result of a combination of changes in precipitation, migration and decreased human population and livestock grazing pressure, but under conditions of maintained and well-defined property rights. Our study emphasizes the large capacity of a semi-arid system to spontaneously regenerate, triggered by decreased pressures, but where existing social institutions mitigate other drivers of deforestation and alternative land-use.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0000402</identifier><identifier>PMID: 17476324</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Analysis ; Aridity ; Art galleries & museums ; Biodiversity ; Conservation biology ; Deforestation ; Didiereaceae ; Ecology/Conservation and Restoration Ecology ; Ecology/Ecosystem Ecology ; Ecology/Spatial and Landscape Ecology ; Ecosystem biology ; Ecosystems ; Endemic species ; Enforcement ; Euphorbiaceae ; Forest management ; Forests ; Geographic Information Systems ; Human population density ; Human populations ; Hypotheses ; Institutions ; Land cover ; Land use ; Landsat ; Landsat satellites ; Livestock ; Livestock grazing ; Madagascar ; Migration ; Natural resource management ; Plant ecology ; Population density ; Precipitation (Meteorology) ; Property rights ; Regeneration ; Remote sensing ; Satellite imagery ; Science Policy ; Society ; Socioeconomic Factors ; Time series ; Trees - growth & development ; Tropical Climate ; Tropical forests</subject><ispartof>PloS one, 2007-05, Vol.2 (5), p.e402-e402</ispartof><rights>COPYRIGHT 2007 Public Library of Science</rights><rights>2007 Elmqvist et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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The highest loss of forest cover occurred in a low human population density area with long distances to markets, while a stable forest cover occurred in the area with highest population density and good market access. Analyses of institutions revealed that loss of forest cover occurred mainly in areas characterized by insecure property rights, while areas with well-defined property rights showed either regenerating or stable forest cover. The results thus corroborate our hypothesis. The large-scale spontaneous regeneration dominated by native endemic species appears to be a result of a combination of changes in precipitation, migration and decreased human population and livestock grazing pressure, but under conditions of maintained and well-defined property rights. 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Although knowledge exists about the institutional context in which tropical forest loss is embedded, little is known about the role of social institutions in influencing regeneration of tropical forests. In the present study we used Landsat images from southern Madagascar from three different years (1984, 1993 and 2000) and covering 5500 km(2), and made a time-series analysis of three distinct large-scale patterns: 1) loss of forest cover, 2) increased forest cover, and 3) stable forest cover. Institutional characteristics underlying these three patterns were analyzed, testing the hypothesis that forest cover change is a function of strength and enforcement of local social institutions. The results showed a minor decrease of 7% total forest cover in the study area during the whole period 1984-2000, but an overall net increase of 4% during the period 1993-2000. The highest loss of forest cover occurred in a low human population density area with long distances to markets, while a stable forest cover occurred in the area with highest population density and good market access. Analyses of institutions revealed that loss of forest cover occurred mainly in areas characterized by insecure property rights, while areas with well-defined property rights showed either regenerating or stable forest cover. The results thus corroborate our hypothesis. The large-scale spontaneous regeneration dominated by native endemic species appears to be a result of a combination of changes in precipitation, migration and decreased human population and livestock grazing pressure, but under conditions of maintained and well-defined property rights. Our study emphasizes the large capacity of a semi-arid system to spontaneously regenerate, triggered by decreased pressures, but where existing social institutions mitigate other drivers of deforestation and alternative land-use.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>17476324</pmid><doi>10.1371/journal.pone.0000402</doi><tpages>e402</tpages><oa>free_for_read</oa></addata></record> |
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| source | Public Library of Science (PLoS) Journals Open Access; MEDLINE; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Analysis Aridity Art galleries & museums Biodiversity Conservation biology Deforestation Didiereaceae Ecology/Conservation and Restoration Ecology Ecology/Ecosystem Ecology Ecology/Spatial and Landscape Ecology Ecosystem biology Ecosystems Endemic species Enforcement Euphorbiaceae Forest management Forests Geographic Information Systems Human population density Human populations Hypotheses Institutions Land cover Land use Landsat Landsat satellites Livestock Livestock grazing Madagascar Migration Natural resource management Plant ecology Population density Precipitation (Meteorology) Property rights Regeneration Remote sensing Satellite imagery Science Policy Society Socioeconomic Factors Time series Trees - growth & development Tropical Climate Tropical forests |
| title | Patterns of loss and regeneration of tropical dry forest in Madagascar: the social institutional context |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-31T21%3A39%3A08IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Patterns%20of%20loss%20and%20regeneration%20of%20tropical%20dry%20forest%20in%20Madagascar:%20the%20social%20institutional%20context&rft.jtitle=PloS%20one&rft.au=Elmqvist,%20Thomas&rft.date=2007-05-02&rft.volume=2&rft.issue=5&rft.spage=e402&rft.epage=e402&rft.pages=e402-e402&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0000402&rft_dat=%3Cgale_plos_%3EA472277760%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1289118923&rft_id=info:pmid/17476324&rft_galeid=A472277760&rft_doaj_id=oai_doaj_org_article_983b33e63d5d422e8bb943d084cf35a3&rfr_iscdi=true |