Vertebrate population changes induced by hunting in Amazonian sustainable-use protected areas

Sampaio, Ricardo; Morato, Ronaldo Gonçalves; Royle, Andy; Abrahams, Mark I.; Peres, Carlos A.; Chiarello, Adriano Garcia

doi:10.1016/j.biocon.2023.110206

Cited by 3 publications

(1 citation statement)

References 64 publications

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“…In our MSOM, the local abundance parameters Z ij represent the number of individuals available for detection around each sampling station 77 , and they can usefully represent a relative measure of the intensity of species habitat use 78 , especially for the larger species for which one individual can be detected by more than one sampling station 79 . We used a data augmentation procedure, adding all-zero detection histories for eight “potentially” undetected species, to estimate species richness at the site level (see 80 ).…”

Section: Methodsmentioning

confidence: 99%

Forest type modulates mammalian responses to megafires

Magioli,

Lima,

Villela

et al. 2024

Sci Rep

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Although considered an evolutionary force responsible for shaping ecosystems and biodiversity, fires’ natural cycle is being altered by human activities, increasing the odds of destructive megafire events. Here, we show that forest type modulates the responses of terrestrial mammals, from species to assemblage level, to a catastrophic megafire in the Brazilian Pantanal. We unraveled that mammalian richness was higher 1 year after fire passage compared to a pre-fire condition, which can be attributed to habitat modification caused by wildfires, attracting herbivores and open-area tolerant species. We observed changes in assemblage composition between burned/unburned sites, but no difference in mammalian richness or relative abundance. However, by partitioning the effects of burned area proportion per forest type (monospecific vs. polyspecific), we detected differential responses of mammals at several levels of organization, with pronounced declines in species richness and relative abundance in monospecific forests. Eighty-six percent of the species presented moderate to strong negative effects on their relative abundance, with an overall strong negative effect for the entire assemblage. Wildfires are predicted to be more frequent with climate and land use change, and if events analogous to Pantanal-2020 become recurrent, they might trigger regional beta diversity change, benefitting open-area tolerant species.

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Section: Methodsmentioning

confidence: 99%

Forest type modulates mammalian responses to megafires

Magioli,

Lima,

Villela

et al. 2024

Sci Rep

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Community-based monitoring reveals low anthropogenic pressure on a game vertebrate population in a sustainable-use Amazonian protected area

Reis,

Benchimol

2024

Envir. Conserv.

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Summary Biodiversity systematic monitoring programmes have been expanding across the globe, especially in protected areas (PAs). Amongst sustainable-use PAs, medium- to large-sized mammals and birds comprise crucial groups to monitor, given their importance to forest functionality and subsistence for local residents. Here, we used 6 years of community-based monitoring data from a sustainable-use PA in the Brazilian Amazonia (Tapajós–Arapiuns Extractive Reserve) to examine the influence of anthropogenic stressors and time on the density and biomass of forest mammal and bird game species. We further assessed trends in population density of target groups over the period. A total of 1915 km of line-transect surveys were completed by trained local monitors along eight established transects, providing data from 12 medium-sized and five large-sized game genera. Generalized linear mixed models of all medium-sized species, all large species and four individual taxa (Tinamidae, Dasyproctidae, primates and Cervidae) showed that some species (e.g., Dasyprocta croconota) exhibited great density, whereas others (e.g., Tapirus terrestris and Tayassu pecari) were rarely detected. Anthropogenic variables did not affect the density and biomass of the overall medium-sized and large vertebrates. Dasyproctidae, Tinamidae and primates were the only taxa influenced by anthropogenic stressors, with negative influence occurring only for Tinamidae. Moreover, density of groups and taxa remained stable throughout the period in the Reserve, although the frequency of some species may indicate past population losses. Continuation of this monitoring programme is required to improve understanding of population fluctuations, but over the 6 years studied, game population density and biomass were not linked to anthropogenic stressors.

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Game harvest in the most populated Amazonian sustainable-use protected area: insights from 5-years of community-based monitoring

Reis,

Benchimol

2024

Preprint

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Although wildlife has long been crucial for food provision and traditions, wildlife overexploitation can pervasively affect populations. Thus, game harvest monitoring initiatives became a key tool to evaluate hunting sustainability across tropical forests. We used a 5-year community-based monitoring database from the Tapajós-Arapiuns Extractive Reserve in the Brazilian Amazon, to examine hunting profile across different villages and assess the influence of anthropogenic stressors and monitored years on community composition (relative frequency and biomass) and hunting productivity using CPUE (catch per unit of effort). We further assessed trends in CPUE of all game species and the six most hunted species along the time series. A total of 5,760 hunting events by 391 families from 13 villages resulted in 6,436 animals from 24 taxa, yielding a harvest of 65,488 kg. Medium to large-sized mammals were the main targets of hunters, but villages exhibited different hunting profiles. Anthropogenic variables did not affect community composition and CPUE, and CPUE remained stable through time. Our findings suggest that hunting is likely sustainable for most species, with the exception of those large and threatened species like Tapirus terrestris and Tayassu pecari. We finally encourage that other Amazonian sustainable-use reserves monitor subsistence hunting through our hunting protocol.

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Vertebrate population changes induced by hunting in Amazonian sustainable-use protected areas

Cited by 3 publications

References 64 publications

Forest type modulates mammalian responses to megafires

Forest type modulates mammalian responses to megafires

Community-based monitoring reveals low anthropogenic pressure on a game vertebrate population in a sustainable-use Amazonian protected area

Game harvest in the most populated Amazonian sustainable-use protected area: insights from 5-years of community-based monitoring

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