Land-cover change in the Paraguayan Chaco: 2000–2011

Caldas, Marcellus M.; Goodin, Douglas G.; Sherwood, S. C.; Krauer, Juan M. Campos; Wisely, Samantha M.

doi:10.1080/1747423x.2013.807314

Cited by 87 publications

(75 citation statements)

References 52 publications

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“…The forest landscape changed significantly between 1979 and 2010 and deforestation processes are probably still active. A thorough discussion of the ecological consequences of the observed forest loss is beyond the scope of this paper, but see Grau et al [2005], Zak et al [2008], Caldas et al [2013], Hoyos et al [2013] for details. From a more general viewpoint, our findings underline the potential role of sample-based relationship spaces for fragmentation analysis.…”

Section: Discussionmentioning

confidence: 99%

Measuring forest fragmentation using multitemporal remotely sensed data: three decades of change in the dry Chaco

Carranza

Frate

Acosta

et al. 2014

European Journal of Remote Sensing

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We introduce an approach based on remotely sensed data to summarize forest fragmentation over time, which specifically accounts for the interdependencies between landscape composition and configuration changes. The proposed method consists of five steps: i) multitemporal landscape sampling, ii) calculation of selected landscape pattern indices, iii) statistical comparison, iv) construction of sampled-based relationship spaces, and v) trajectory analysis. To show how the proposed method works in practice we examined the multitemporal fragmentation of the Arid Chaco forest in central Argentina during the period 1979-2010 using forest maps derived from Landsat images. As shown by our results, the approach provides a consistent framework for the interpretation of landscape structural changes over time.

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Section: Discussionmentioning

confidence: 99%

Measuring forest fragmentation using multitemporal remotely sensed data: three decades of change in the dry Chaco

Carranza

Frate

Acosta

et al. 2014

European Journal of Remote Sensing

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“…More than 20% of the forest cover in the study area was lost between 2000 and 2014, with focal areas of deforestation in the Dry Chaco of Argentina, Bolivia and Paraguay (Killeen et al 2007, Hansen et al 2013, Vallejos et al 2015, Chiquitano Forest in eastern Bolivia (Killeen et al 2007) and the Humid Chaco and Pantanal in Paraguay (Caldas et al 2015). The most extensive and rapid deforestation occurred in the Dry Chaco of western Paraguay (Hansen et al 2013, Caldas et al 2015, Vallejos et al 2015 where, for example, from 2000 to 2012, > 3.2 million ha were deforested, equal to 19% of the forest area in 2000.…”

Section: Study Area and Land-use Historymentioning

confidence: 99%

“…The most extensive and rapid deforestation occurred in the Dry Chaco of western Paraguay (Hansen et al 2013, Caldas et al 2015, Vallejos et al 2015 where, for example, from 2000 to 2012, > 3.2 million ha were deforested, equal to 19% of the forest area in 2000. As a result, 26% of the region had been deforested by 2012, with the deforestation from 2000-2012 constituting 70% of all deforested land in the Paraguayan Dry Chaco region (Vallejos et al 2015).…”

Section: Study Area and Land-use Historymentioning

confidence: 99%

“…At the southern extent of the jaguar's range, an important region-wide threat to maintaining connectivity among JCUs stems from deforestation and land-use changes that have been occurring during the last 15 yr, particularly in the Gran Chaco, which has been subjected to some of the highest deforestation rates in the world (Hansen et al 2013, Caldas et al 2015, Vallejos et al 2015.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the effects of deforestation on the connectivity of jaguar Panthera onca populations at the southern extent of the species’ range

Thompson¹,

Velilla²

2017

Endang. Species. Res.

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We employed least-cost and circuit theory modeling to model the connectivity among previously defined Jaguar Conservation Units (JCUs) at the southern limit of the jaguar's range in Argentina, Bolivia, Brazil and Paraguay, in order to assess the effects of deforestation and land use change between 2000 and 2014. Due to uncertainty about possible limitations to jaguar dispersal, we examined connectivity where linkages were not cost-limited and limited to 1000 km cost-weighted distance. When linkage length was not cost-limited, total linkage area decreased by 9%, and mean least-cost distance and mean effective resistance increased by 6 and 31%, respectively, from 2000 to 2014. Limiting linkages to 1000 km cost-weighted distance indicated that the southern-and eastern-most JCUs were isolated as early as 2000 and that the number of linkages between the other JCUs decreased between 2000 and 2014, causing the linkage area to decrease by 27% while the least-cost distance of the remaining linkages increased by a mean of 4% and effective resistance increased on average by 44%. By limiting linkages to a plausible costweighted distance, we demonstrated that JCUs in the Atlantic Forest, Argentine Chaco and the Argentine/Bolivian Yungas have been isolated since at least 2000, and that there has been a loss of connectivity through eastern Bolivia, increased resistance in the remaining linkages and a constriction of all but one linkage to a minimum width of < 8 km. Our results are consistent with an observed loss of genetic diversity in jaguar populations within portions of our study area and indicate a need for further research to better quantify jaguar dispersal.

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“…Anthropogenic and naturally induced factors are the prime causes for rangelands degradation (Abate et al, 2010), consequential it is disturbing the delivery of ecosystem services and goods (Caldas et al, 2015). These changes also affects livestock mobility, grazing areas and the conflicts over natural resources (Egeru et al, 2014).…”

Section: Author(s) Agree That This Article Remains Permanently Open Amentioning

confidence: 99%

Land use/cover change analysis and local community perception towards land cover change in the lowland of Bale rangelands, Southeast Ethiopia

Mussa¹,

Teka²,

Mesfin³

2017

Int. J. Biodivers. Conserv.

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Changes in ecosystem functions can be analyzed through changes in land use land cover (LULC) systems. This study was carried out to analyze the LULC changes and perception of local community towards land cover change in the lowlands of Bale, Southeast Ethiopia using remote sensing data, field observations and perception of local people. The results showed that cultivated land, settlement, bush land and bare land expanded by 13.81, 14.30, 12.62 and 22.3% respectively, between 1986 and 2016, whereas wood land, grassland and shrubby grassland declined by 33.82, 24.4 and 3.36% respectively. Local communities' perceptions indicate that climatic, demographic and anthropogenic factors as well as implementation of inappropriate government policy and development interventions were major driving forces of LULC dynamics. Environmental and local livelihoods implications such as rangeland degradation, bush encroachment, soil degradation, livestock loss, biodiversity loss and poverty increase resulted from these changes. Cumulative effects contribute to rangeland degradation and poverty. Therefore, to halt the impact of LULC disturbance and its implication on the likelihood of the pastoralist, appropriate management measures and government policies have to be implemented.

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Land-cover change in the Paraguayan Chaco: 2000–2011

Cited by 87 publications

References 52 publications

Measuring forest fragmentation using multitemporal remotely sensed data: three decades of change in the dry Chaco

Measuring forest fragmentation using multitemporal remotely sensed data: three decades of change in the dry Chaco

Modeling the effects of deforestation on the connectivity of jaguar Panthera onca populations at the southern extent of the species’ range

Land use/cover change analysis and local community perception towards land cover change in the lowland of Bale rangelands, Southeast Ethiopia

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