Satellite Change Detection Analysis of Deforestation Rates and Patterns along the Colombia – Ecuador Border

Viña, Andrés; Echavarria, Fernando R.; Rundquist, Donald C.

doi:10.1639/0044-7447(2004)033[0118:scdaod]2.0.co;2

Cited by 19 publications

(29 citation statements)

References 14 publications

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“…The highest deforestation rates for the region correspond to the geometric and patchy deforestation patterns (3.7% and 2.0%, respectively). Similar rates have been observed by other authors for the La Macarena region (0.97%, Armenteras et al 2006), lowland forests of Colombia (1.5%, Etter et al 2006a), and Colombian‐Ecuadorian Amazonia (1.6%, Viña et al 2004, 0.9%, Sierra 2000).…”

Section: Discussionsupporting

confidence: 90%

“…In recent years, several studies of patterns of land‐use change in the Andean, Caribbean and Amazonian regions have shown that differences in biophysical characteristics can influence land‐use patterns (Armenteras et al 2003, Viña et al 2004, Etter et al 2005, 2006a). Few studies, however, have identified the spatial patterns of deforestation and fragmentation and analyzed the temporal dynamics of the landscape in regions such as the Guyana Shield.…”

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Patterns and Trends of Forest Loss in the Colombian Guyana

et al. 2011

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Spatial patterns of tropical deforestation and fragmentation are conditional upon human settlement characteristics. We analyze four different human occupation models (indigenous, colonist frontier, transition and established settlement) in the Colombian Guyana Shield at three different times : 1985, 1992 and 2002, and compared them for: (1) deforestation rates; (2) the amount of forest as classified according to a fragmentation pattern (interior forest, edge forest, perforated forest and forest patch); (3) various fragmentation metrics using repeated measures analysis of variance; and (4) potential future deforestation trends though the implementation of a spatially explicit simulation model. The indigenous and colonist frontier occupation models had low rates of deforestation (0.04%/yr), while the wellestablished settlement occupation model had the highest rate (3.68%/yr). Our results indicate that the four occupation models generate three deforestation patterns: diffuse, which can be subdivided into two subpatterns (indigenous and colonist), geometric (transition) and patchy (established settlement). The area with the established settlement model was highly fragmented, while in the transition occupation area, forest loss was gradual and linked to economic activities associated with the expansion of the agricultural frontier. The simulation of future trends revealed that indigenous and colonist areas had a constant, albeit small, loss of forest covers. The other models had a deforestation probability of 0.8 or more. Overall, our results highlight the need for new and urgent policies for reducing forest conversion that consider intraregional variability in human occupation linked to differences in land-use patterns.Abstract in Spanish is available in the online version of this article.

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Section: Discussionsupporting

confidence: 90%

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confidence: 99%

Patterns and Trends of Forest Loss in the Colombian Guyana

et al. 2011

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“…During the first studied period (1976–1989), the annual deforestation rate (0.75%) was similar to the 0.70% decline of old-growth forest in Central Ecuador between 1963 and 1983 reported by Wunder [ 73 ]. Both rates are lower than the 1.17% reported from the North Ecuadorian Amazon for 1973 to 1985 [ 21 ].…”

Section: Discussionmentioning

confidence: 56%

Deforestation and Forest Fragmentation in South Ecuador since the 1970s – Losing a Hotspot of Biodiversity

et al. 2015

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Deforestation and fragmentation are major components of global change; both are contributing to the rapid loss of tropical forest area with important implications for ecosystem functioning and biodiversity conservation. The forests of South Ecuador are a biological ‘hotspot’ due to their high diversity and endemism levels. We examined the deforestation and fragmentation patterns in this area of high conservation value using aerial photographs and Aster satellite scenes. The registered annual deforestation rates of 0.75% (1976–1989) and 2.86% (1989–2008) for two consecutive survey periods, the decreasing mean patch size and the increasing isolation of the forest fragments show that the area is under severe threat. Approximately 46% of South Ecuador’s original forest cover had been converted by 2008 into pastures and other anthropogenic land cover types. We found that deforestation is more intense at lower elevations (premontane evergreen forest and shrubland) and that the deforestation front currently moves in upslope direction. Improved awareness of the spatial extent, dynamics and patterns of deforestation and forest fragmentation is urgently needed in biologically diverse areas like South Ecuador.

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“…17 See, for example, Viña and Cavelier (1999), Etter, McAlpine, Pullar, and Possingham (2006), Dávalos et al (2011), Viña et al (2004) and Armenteras et al (2009).…”

Section: Data On Potential Channelsmentioning

confidence: 99%

The Environmental Impact of Civil Conflict: The Deforestation Effect of Paramilitary Expansion in Colombia

2014

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Impreso en Colombia-Printed in Colombia El contenido de la presente publicación se encuentra protegido por las normas internacionales y nacionales vigentes sobre propiedad intelectual, por tanto su utilización, reproducción, comunicación pública, transformación, distribución, alquiler, préstamo público e importación, total o parcial, en todo o en parte, en formato impreso, digital o en cualquier formato conocido o por conocer, se encuentran prohibidos, y sólo serán lícitos en la medida en que se cuente con la autorización previa y expresa por escrito del autor o titular. Las limitaciones y excepciones al Derecho de Autor, sólo serán aplicables en la medida en que se den dentro de los denominados Usos Honrados (Fair use), estén previa y expresamente establecidas, no causen un grave e injustificado perjuicio a los intereses legítimos del autor o titular, y no atenten contra la normal explotación de la obra.

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Satellite Change Detection Analysis of Deforestation Rates and Patterns along the Colombia – Ecuador Border

Cited by 19 publications

References 14 publications

Patterns and Trends of Forest Loss in the Colombian Guyana

Patterns and Trends of Forest Loss in the Colombian Guyana

Deforestation and Forest Fragmentation in South Ecuador since the 1970s – Losing a Hotspot of Biodiversity

The Environmental Impact of Civil Conflict: The Deforestation Effect of Paramilitary Expansion in Colombia

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