Forest cover and deforestation patterns in the Northern Andes (Lake Maracaibo Basin): A synoptic assessment using MODIS and Landsat imagery

Portillo-Quintero, Carlos; Sanchez, Ana M.; Valbuena, Carlos; González, Yojany; Larreal, Junior T.

doi:10.1016/j.apgeog.2012.06.015

Cited by 50 publications

(25 citation statements)

References 31 publications

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“…The loss of forest cover as a result of deforestation is a major concern to the environmentalists the world over, studies by the Food and Agricultural Organization (FAO), International Tropical Timber Organization (ITTO) and the World Preservation Fund (WPF) have shown that the world has lost about 80% of its forest cover in recent time [12]- [15]. These declines in forest cover is attributed to be one of the major causes of climate change as a result of lack of adequate forest stock to absorb carbon and greenhouse gases (GHG) [16].…”

Section: Overview Of Deforestationmentioning

confidence: 99%

Modelling the Violation of Restrictions Pertaining to Deforestation in a Given Land Right

Tumba¹,

Ariff²

2015

JEP

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This paper develops a model that could be used to visualize and predict the violation of restrictions in a given forest. The violation of restriction in this case is assumed to be the difference in areal extent between two forest cover scenes with time; termed "deforestation". It analyses the relationship in forest cover changes overtime in Ganye Forest Reserve and Glide Cross Country Farm in Adamawa state, Nigeria. Cadastral maps of the forest reserve and farmland were used as the base maps, while the satellite images served as the spatio-temporal data. Landsat ETM+ images of 2003, 2008 and 2013 were used to identify, determine and estimate the violation of restrictions. The result shows that the violation of restrictions could be reliably determined for both the forest reserve and farmland and forecast made in order to predict future occurrence. It also revealed a continuous deforestation in the forest reserve, while in the farmland regeneration of forest stock was noticed. This information is very vital for forest management, planning and decision making in a viable land administration domain.

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Section: Overview Of Deforestationmentioning

confidence: 99%

Modelling the Violation of Restrictions Pertaining to Deforestation in a Given Land Right

Tumba¹,

Ariff²

2015

JEP

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“…Most of the studies have used remotely sensed data with medium spatial resolution such as Landsat Thematic Mapper (TM) images to quantify the spatial pattern of urban greenspace and its changes (Hurd et al, 2001;Seto et al, 2002;Yuan et al, 2005;Kong and Nakagoshi, 2006;Zhou and Wang, 2011;Miller, 2012;Portillo-Quintero et al, 2012). These studies have shown that greenspace was very dynamic on the urban fringe.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have shown that greenspace was very dynamic on the urban fringe. In particular, urban expansion has led to great loss of urban greenspace (Seto et al, 2002;Yuan et al, 2005;Portillo-Quintero et al, 2012), as well as greenspace fragmentation (Hurd et al, 2001;Miller, 2012). In contrast, changes in urban greenspace tended to be ignored in more intensively urbanized locations (Zhou et al, 2011b).…”

Section: Introductionmentioning

confidence: 99%

Understanding the dynamic of greenspace in the urbanized area of Beijing based on high resolution satellite images

Qian

Zhou

Liu

et al. 2015

Urban Forestry & Urban Greening

116

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a b s t r a c tUrban greenspace plays an essential role in urban ecosystem and highly contributes to the welfare of urban residents. Understanding the dynamics of greenspace is crucial for its planning and management. Previous studies have largely focused on changes in greenspace in urbanizing regions, using medium resolution remotely sensed data. However, the changes of greenspace in urbanized areas need to be accurately quantified based on high spatial resolution images because they are directly related to human health and well-being. This paper aims to enhance the understanding on dynamics of greenspace within well-developed areas of the city, using Beijing City, China as a case study. Using high spatial resolution remotely sensed imagery, we analyzed the spatial pattern of greenspace and its change on two scales: (1) the entire area within the 5th ring road, and (2) in 4 belts from urban center to fringe. We found urban greenspace was very dynamic. The proportion of urban greenspace increased by 5.45%, or 36.3 km 2 in size from 2005 to 2009. The amounts of gain and loss of greenspace were 69 km 2 and 32.7 km 2 , respectively, or 10.36% and 4.91% of the entire study area. Because of the very limited lands for greening in urbanized areas, the new patches of greenspace were generally small, with the mean patch size of 676.31 m 2 . However, those small patches enhanced the connectivity and continuity of urban greenspace. In addition, we found the differences in configuration of greenspace patches across the 4 belts were greater than the differences in total percent cover, indicating that compared to percent coverage, greenspace configuration may be more influenced by the development age.

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“…Rivas et al 2007, Barros et al 2010. Only approximately 12% (3,522 km 2 ) of the Lake Maracaibo basin original dry forest remain (Portillo-Quintero et al 2012). One of the main dry forest remnants in the western coast of the Maracaibo lake basin is located in the vicinity of the Maracaibo botanical garden (JBM for its Spanish acronym) and the "La Chinita" International Airport, located a few kilometres from the city of Maracaibo in the municipality of San Francisco, Zulia state.…”

Section: Introductionmentioning

confidence: 99%

Squamata reptiles of a fragment of tropical dry forest in northwestern Venezuela (Lake Maracaibo region)

Larreal

Rivas

Portillo-Quintero

et al. 2012

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We present a commented taxonomic list of the reptiles found during herpetological surveys carried out in an isolated fragment of tropical dry forest located in the municipality of San Francisco, Zulia state, northwestern Venezuela between January-December 2011. We report a total of 24 species belonging to the order Squamata, distributed in 12 families and 21 genera. Colubridae is the most diverse family with six species, followed by Dipsadidae (four species), Boidae, Gymnophthalmidae, Phyllodactylidae and Teiidae with two species each, and finally Dactyloidae, Iguanidae, Elapidae, Gekkonidae, Sphaerodactylidae and Viperidae with a single species each. The species composition at this site matches what would be expected in a tropical dry forest in the region. Our study suggests that this isolated tropical dry forest fragment is the last refuge of the herpetofauna that once occupied much of the dry forests of the northern Maracaibo basin and should therefore be considered for conservation purposes.

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Forest cover and deforestation patterns in the Northern Andes (Lake Maracaibo Basin): A synoptic assessment using MODIS and Landsat imagery

Cited by 50 publications

References 31 publications

Modelling the Violation of Restrictions Pertaining to Deforestation in a Given Land Right

Modelling the Violation of Restrictions Pertaining to Deforestation in a Given Land Right

Understanding the dynamic of greenspace in the urbanized area of Beijing based on high resolution satellite images

Squamata reptiles of a fragment of tropical dry forest in northwestern Venezuela (Lake Maracaibo region)

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