Land cover change and landscape fragmentation—comparing the utility of continuous and discrete analyses for a western Honduras region

Southworth, Jane; Munroe, Darla K.; Nagendra, Harini

doi:10.1016/j.agee.2003.09.011

Cited by 168 publications

(111 citation statements)

References 41 publications

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“…O cálculo desses índices pode ser realizado a partir de métricas de área, forma, borda, área do núcleo, proximidade, isolamento, contraste, contágio e diversidade, entre outros (McGarigal et al, 1995). Vários trabalhos também já foram realizados aplicando essas métricas para diversas finalidades (Raines, 2002;Southworth et al, 2004;Liu et al, 2009;Midha & Mathur, 2010;Pang et al, 2010;Pham et al, 2011). Pham et al (2011) aplicaram técnicas de sensoriamento remoto e métricas da paisagem para monitorar a urbanização entre os anos de 1975 e 2003, em quatro cidades do Vietnã, Japão, Estados Unidos e China.…”

Section: Revista Brasileira De Engenharia Agrícola E Ambientalunclassified

“…Para mitigar esses problemas e fomentar o desenvolvimento de políticas públicas para uma gestão sustentável dos recursos naturais, torna-se imprescindível o monitoramento do Uso e da Cobertura do Solo (UCS), através de informações espaço-temporais detalhadas das modificações ocorridas na paisagem (Jansen & Di Gregório, 2004;Southworth et al, 2004;Mendoza …”

Section: Introductionunclassified

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Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Coelho¹,

Montenegro²,

Almeida

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OAs mudanças no uso e na ocupação do solo, provocadas pelas ações antrópicas, têm gerado grandes impactos nas paisagens. Esses impactos podem ser mitigados através do monitoramento do uso e da cobertura do solo utilizando-se informações espaço-temporais das modificações ocorridas na paisagem. Este trabalho apresenta uma análise espaço-temporal detalhada da dinâmica do uso e ocupação do solo da bacia hidrográfica do riacho São Paulo, localizada na região semiárida do Estado de Pernambuco, entre os anos de 1991 e 2010. Partindo da classificação de três imagens de satélite dos anos de 1991, 2000 e 2010, foram utilizadas matrizes de transição, associadas à álgebra de mapas e métricas da paisagem. Os resultados mostraram que durante o período estudado as classes de uso e ocupação do solo passaram por uma grande transição, com a substituição progressiva das áreas de vegetação de caatinga aberta por áreas com pastagem/agricultura. Junto com o rápido crescimento da classe pastagem/agricultura, a paisagem predominante de vegetação nativa foi sendo substituída por uma paisagem cada vez mais devastada, heterogênea e fragmentada, como mostraram os índices das métricas da paisagem.Dynamic of land use/cover change processes in a Brazilian semiarid watershed A B S T R A C TThe changes in the use and occupation of land, caused by human actions, have created major impacts on the landscapes. These impacts can be mitigated by monitoring the use and land cover, using spatial and temporal information of the changes occurring in the landscape. This paper presents a detailed analysis of spatial and temporal dynamics of land use and occupation of the stream São Paulo watershed, located in the semiarid region of Pernambuco State, during the period from 1991 to 2010. Based on the classification of three satellite images for the years 1991, 2000 and 2010, transition matrices were used associated with the algebra of maps, and landscape metrics. The results showed that during the studied period, the classes of land use and occupation went through a major transition, with the gradual replacement of sparse area of 'caatinga' vegetation by grazing areas/agriculture. Along with the rapid growth of the grazing areas/agriculture class, the predominant landscape of native vegetation has been replaced by a landscape increasingly devastated, fragmented and heterogeneous, as shown by the index of landscape metrics.

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Section: Revista Brasileira De Engenharia Agrícola E Ambientalunclassified

Section: Introductionunclassified

Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Coelho¹,

Montenegro²,

Almeida

et al. 2014

Rev. bras. eng. agríc. ambient.

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“…For example, in Puerto Rico, where human pressure is greatest among our study areas, forest fragmentation indices show smaller mean patch area, higher patch density, and less core area (Table 3). Severe tropical forest destruction has been widely documented (33,34), particularly in dry tropical forests (23,35). On the other hand, the results suggest the picture is more complicated than might be attributed to human population pressure alone.…”

Section: Discussionmentioning

confidence: 46%

Characterizing Forest Fragments in Boreal, Temperate, and Tropical Ecosystems

Meddens

Hudak²,

Gould³

et al. 2008

AMBIO: A Journal of the Human Environment

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An increased ability to analyze landscapes in a spatial manner through the use of remote sensing leads to improved capabilities for quantifying human-induced forest fragmentation. Developments of spatially explicit methods in landscape analyses are emerging. In this paper, the image delineation software program eCognition and the spatial pattern analysis program FRAG-STATS were used to quantify patterns of forest fragments on six landscapes across three different climatic regions characterized by different moisture regimes and different influences of human pressure. Our results support the idea that landscapes with higher road and population density are more fragmented; however, there are other, equally influential factors contributing to fragmentation, such as moisture regime, historic land use, and fire dynamics. Our method provided an objective means to characterize landscapes and assess patterns of forest fragments across different forested ecosystems by addressing the limitations of pixel-based classification and incorporating image objects.

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“…These randomly selected pixels were used to calibrate (using 2/3 of the pixels) and validate (using the remaining 1/3 of the pixels) logistic regression models [logistic procedure (SAS 2004)] for predicting the probability of forest loss and recovery during the 1994-2001 period. Some biophysical and demographic variables shown to be strongly correlated with forest cover dynamics in previous spatially explicit models (Southworth and Tucker 2001;Nagendra et al 2003;McConnell et al 2004;Southworth et al 2004) were selected for use as predictor variables in these logistic regression models. These included elevation, slope, and aspect [converted into soil moisture classes (Parker 1982)], all derived from a digital elevation model acquired by the Shuttle Radar Topography Mission (SRTM) (Berry et al 2007), together with distance to the nearest forest edge in 1994 and human population density.…”

Section: Influence Of Conservation Policies On Forest Cover Dynamicsmentioning

confidence: 99%

Effects of Natural Disasters on Conservation Policies: The Case of the 2008 Wenchuan Earthquake, China

Viña

Chen

McConnell

et al. 2010

AMBIO

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Conservation policies are increasing in response to human-induced ecosystem degradation, but little is known about their interplay with natural disasters. Through an analysis of satellite imagery and field data we evaluated the impacts of a devastating earthquake on forest recovery and avoided forest loss estimated to have been obtained by two of the largest conservation programs in the world. Results show that more than 10% of the forests in Wenchuan County, Sichuan province, China were immediately affected by the 2008 earthquake, offsetting some gains in forest cover observed since the enactment of the conservation programs. But without the enactment of these conservation programs, the combined effects of human disturbance and earthquake-induced landslides could have severely reduced the region's forest cover. The continuation-and enhancement-of incentives for participation in conservation programs will be important for reducing the environmental impacts of the combined effects of human disturbance and natural hazards not only in the study area but also in many disaster-prone regions around the world.

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Land cover change and landscape fragmentation—comparing the utility of continuous and discrete analyses for a western Honduras region

Cited by 168 publications

References 41 publications

Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Characterizing Forest Fragments in Boreal, Temperate, and Tropical Ecosystems

Effects of Natural Disasters on Conservation Policies: The Case of the 2008 Wenchuan Earthquake, China

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