Analysis of the landscape complexity and heterogeneity of the Pantanal wetland

Miranda, Camila Oliveira; Gamarra, Roberto Macedo; Mioto, Camila Leonardo; Silva, N. M.; Filho, A. Paranhos; Pott, Arnildo

doi:10.1590/1519-6984.08816

Cited by 27 publications

(13 citation statements)

References 21 publications

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“…The Pantanal is one of the largest continental wetlands of the world and provides important ecosystem services such as water regulation, population well-being and the conservation of biodiversity (Brazil 2016). It encompasses complex regions that display environmental heterogeneity and is highly influenced by the local water regime (Junk & Da Silva 1996, Nunes da Cunha & Junk 2009, Miranda et al 2018, which is controlled by the flood pulse (Junk et al 1989). This ecosystem is threatened mainly by extensive agricultural activities, expansion of the hydroelectric sector and waterway transportation (Harris et al 2005, Da Silva et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Bird Community Structure in Macrohabitats of the Aquaticterrestrial Transition Zone in the Pantanal Wetland, Brazil

et al. 2020

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Ecological responses of bird communities in aquatic-terrestrial transition zones (ATTZs) are only partially understood. The aim of this study was to evaluate community structure of birds in different macrohabitats of ATTZs from a protected area in the Pantanal wetland, Brazil. The survey of birds was carried out in three types of macrohabitats: Erythrina fusca Lour. monospecific forest, shrubland and pioneer polyespecific forest, and flooded grassland. The bird community living within the ATTZ varied according to macrohabitat type and period of the wetland landscape. We emphasise the importance of this protected area to biodiversity. Employ greater environmental control is required, since the region is not exempt from direct and indirect impacts derived from the Upper Paraguay River Basin.

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Section: Introductionmentioning

confidence: 99%

Bird Community Structure in Macrohabitats of the Aquaticterrestrial Transition Zone in the Pantanal Wetland, Brazil

et al. 2020

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“…Differences in mean abundance values of size-based groups (small and medium) between study areas (Mun-ya-wana game reserve, mixed farms and communal lands) were tested using GLM with 3-level area covariate and binomial error distribution. The magnitude of patchiness in each area was ascertained by spatial-point pattern analysis of count data using Lloyd’s index of patchiness [ 62 ]. A Lloyd’s index of 1 indicates a random distribution, whilst one <1 suggests uniformity and >1 patchiness.…”

Section: Methodsmentioning

confidence: 99%

Patterns and Drivers of Rodent Abundance across a South African Multi-Use Landscape

Afonso

Swanepoel

Rosa

et al. 2021

Animals

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South Africa’s decentralized approach to conservation entails that wildlife outside formally protected areas inhabit complex multi-use landscapes, where private wildlife business (ecotourism and/or hunting) co-exist in a human-dominated landscape matrix. Under decentralized conservation, wildlife is perceived to benefit from increased amount of available habitat, however it is crucial to understand how distinct management priorities and associated landscape modifications impact noncharismatic taxa, such as small mammals. We conducted extensive ink-tracking-tunnel surveys to estimate heterogeneity in rodent distribution and investigate the effect of different environmental factors on abundance patterns of two size-based rodent groups (small- and medium-sized species), across three adjacent management contexts in NE KwaZulu-Natal, South Africa: a private ecotourism game reserve, mixed farms and traditional communal areas (consisting of small clusters of houses interspersed with grazing areas and seminatural vegetation). Our hypotheses were formulated regarding the (1) area typology, (2) vegetation structure, (3) ungulate pressure and (4) human disturbance. Using a boosted-regression-tree approach, we found considerable differences between rodent groups’ abundance and distribution, and the underlying environmental factors. The mean relative abundance of medium-sized species did not differ across the three management contexts, but small species mean relative abundance was higher in the game reserves, confirming an influence of the area typology on their abundance. Variation in rodent relative abundance was negatively correlated with human disturbance and ungulate presence. Rodent abundance seems to be influenced by environmental gradients that are directly linked to varying management priorities across land uses, meaning that these communities might not benefit uniformly by the increased amount of habitat promoted by the commercial wildlife industry.

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“…The landscape metric NDVI spatial , which estimates the spatial variability change of NDVI, was used in this study as a proxy for vegetation structure change. Vegetation heterogeneity change (i.e., vegetation horizontal structure change) can be quantified through NDVI texture analysis techniques (e.g., [79][80][81]), which measure the variability of pixel values in a given area [82]. A highly heterogeneous vegetation cover, either in terms of the spatial distribution of plants or plant species composition therefore presents a high variability in NDVI, whereas a homogeneous vegetation cover will present a low variability [82].…”

Section: Vegetation Change Analysismentioning

confidence: 99%

Integrated Landscape Change Analysis of Protected Areas and their Surrounding Landscapes: Application in the Brazilian Cerrado

et al. 2020

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Remote sensing tools have been long used to monitor landscape dynamics inside and around protected areas. Hereto, scientists have largely relied on land use and land cover (LULC) data to derive indicators for monitoring these dynamics, but these metrics do not capture changes in the state of vegetation surfaces that may compromise the ecological integrity of conservation areas’ landscapes. Here, we introduce a methodology that combines LULC change estimates with three Normalized Difference Vegetation Index-based proxy indicators of vegetation productivity, phenology, and structural change. We illustrate the utility of this methodology through a regional and local analysis of the landscape dynamics in the Cerrado Biome in Brazil in 2001 and 2016. Despite relatively little natural vegetation loss inside core protected areas and their legal buffer zones, the different indicators revealed significant LULC conversions from natural vegetation to farming land, general productivity loss, homogenization of natural forests, significant agricultural expansion, and a general increase in productivity. These results suggest an overall degradation of habitats and intensification of land use in the studied conservation area network, highlighting serious conservation inefficiencies in this region and stressing the importance of integrated landscape change analyses to provide complementary indicators of ecologically-relevant dynamics in these key conservation areas.

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Analysis of the landscape complexity and heterogeneity of the Pantanal wetland

Cited by 27 publications

References 21 publications

Bird Community Structure in Macrohabitats of the Aquaticterrestrial Transition Zone in the Pantanal Wetland, Brazil

Bird Community Structure in Macrohabitats of the Aquaticterrestrial Transition Zone in the Pantanal Wetland, Brazil

Patterns and Drivers of Rodent Abundance across a South African Multi-Use Landscape

Integrated Landscape Change Analysis of Protected Areas and their Surrounding Landscapes: Application in the Brazilian Cerrado

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