Living on the edge: Forest cover threshold effect on endangered maned sloth occurrence in Atlantic Forest

Santos, Paloma Marques; Bailey, Larissa L.; Ribeiro, Milton Cézar; Chiarello, Adriano Garcia; Paglia, Adriano Pereira

doi:10.1016/j.biocon.2019.108264

Cited by 14 publications

(20 citation statements)

References 66 publications

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“…While this flexibility may guarantee a relative resistance to the current fragmentation and disturbance of the remaining Atlantic Forest, the species is not likely to persist in landscapes with <20% of forest cover, due to high extinction rates and low recolonization of small and isolated forest patches (Santos et al . 2019) rather than food resource limitations.…”

Section: Discussionmentioning

confidence: 99%

Feeding ecology of the maned sloth (Bradypus torquatus): Understanding diet composition and preferences, and prospects for future studies

2022

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Aspects of the feeding ecology of the threatened maned sloth (Bradypus torquatus Illiger, 1811) are poorly understood. Here, we evaluate the diet composition and the influence of leaf chemical compounds on the consumption of plant species by 10 radio-tracked individuals in southern Bahia and construct a list of plants consumed by the species based on our data and the available literature. We confirmed that the maned sloth is a strict folivore and consumes predominantly young leaves. We reported the consumption of 39 species, from 32 genera and 20 families of plants in southern Bahia, and provide an updated list of 68 species so far reported as consumed by maned sloths. The most frequently consumed species in southern Bahia belong to the genera Emmotum, Inga, Ficus and Brosimum, totalling almost half of the maned sloth's diet. Nevertheless, only Ficus spp. were widely consumed by maned sloths elsewhere. The low consumption of Cecropia spp. suggests that maned sloth's diet is not strongly linked to these taxa as reported for other Bradypus. None of the evaluated chemical compounds had a significant effect on the choice of plants consumed. Altogether, the available data indicated that the maned sloth is a generalist at the species level. In addition to morphological and physiological adaptations, it deals with the challenges of a foliage-based diet by selecting young leaves. Our update on maned sloth's diet may be used to overcome the difficulties of keeping and reproducing them in captivity and support actions that aim to recover their habitat.

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Section: Discussionmentioning

confidence: 99%

Feeding ecology of the maned sloth (Bradypus torquatus): Understanding diet composition and preferences, and prospects for future studies

2022

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“…Thus, it is essential to create alternatives for connectivity between those fragments and at close distances. The other fragments of Santa Luzia do Itanhy, for example, can be transformed into private natural heritage reserves (RPPN, in Portuguese) once those areas may also englobe the threatened maned sloth (Bradypus torquatus) (Santos et al, 2019) the quality of all the fragments. Additionally, future reforestation programs resulting from environmental compensation (as a compensation process from massive infrastructure constructions) might prioritize the plant species enrichments in those areas.…”

Section: Implications For Conservationmentioning

confidence: 99%

“…Consequently, the forest composition and structure may suffer essential changes, with a decrease of large trees and an overall simplification of forest structure due to habitat isolation and subsequently edge effects (Rocha-Santos et al, 2016). This shifting in the habitat may have severe consequences on arboreal animal species, which depend almost exclusively on arboreal trees (Santos et al, 2016(Santos et al, , 2019. Considering forest-dwelling species, such as Neotropical primates, the combination of those factors may be crucial to their diversity (Gouveia et al, 2014) and maintenance (Terborgh, 1983;Kinzey, 1997).…”

Section: Introductionmentioning

confidence: 99%

Estrutura e Composição de Fragmentos de Mata Atlântica Habitados por Callicebus coimbrai no Nordeste do Brasil: Subsídios para Estratégias de Manejo da Paisagem

Santana

Santos²,

Marques³

et al. 2022

BioBrasil

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Caracterizar a estrutura do habitat, identificando a funcionalidade de espécies arbóreas, é uma estratégia importante para auxiliar programas de manejo. Este estudo objetivou caracterizar a estrutura do habitat, identificar a composição ecológica e o tipo de síndrome de dispersão das árvores em fragmentos habitados pelo ameaçado de extinção Callicebus coimbrai, Mata Atlântica em Sergipe. Foram percorridos oito transectos pelo método do quadrante errante, com 780 pontos registrados em 3.166,71m percorridos. Em cada ponto, coletamos o DAP, altura, distância entre dois pontos (árvores), além da identificação da espécie de árvore. Analisamos abundância, densidade, frequência, dominância basal, índice de valor de importância, além do cálculo do índice de diversidade e equitabilidade de Pielou. A distância média entre as árvores foi de 4,05±2,75m, a altura média foi de 11,69±3,10m, e o DAP médio foi de 25,75±13,53cm, com poucas diferenças significativas entre os fragmentos. Em geral, as estruturas são pobres e a composição das árvores é formada principalmente por espécies pioneiras e secundárias iniciais, e espécies com síndrome de dispersão zoocórica. Esses locais apresentam uma estrutura instável para os macacos guigós habitarem. Além disso, estão distantes de outros locais, dificultando a movimentação dos indivíduos. Esses resultados mostram a importância de caracterizar a estrutura, utilizar os traços ecológicos das árvores como medida da qualidade do habitat, auxiliando programas de manejo que visem a preservação e conservação de espécies ameaçadas e seus habitat.

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“…However, this requires knowledge of the 'thresholds' that pertain in each case. Identifying species' thresholds to threat intensity could then inform management decisions (Figure 1, panels 6-7); for example, retaining a certain proportion of forest cover to maintain species abundance and diversity [62,63]. We propose that species' population abundance, or proxies of abundance (such as relative abundance, occupancy), are practical and relevant metrics for tracking species' responses, which can be used as an indicator of conservation success with stable or increasing populations as the conservation target [5,8].…”

Section: Monitoring Taxa Response Thresholdsmentioning

confidence: 99%

Targeting Conservation Actions at Species Threat Response Thresholds

Ingram

Ferreira

Jones

et al. 2021

Trends in Ecology & Evolution

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Living on the edge: Forest cover threshold effect on endangered maned sloth occurrence in Atlantic Forest

Cited by 14 publications

References 66 publications

Feeding ecology of the maned sloth (Bradypus torquatus): Understanding diet composition and preferences, and prospects for future studies

Feeding ecology of the maned sloth (Bradypus torquatus): Understanding diet composition and preferences, and prospects for future studies

Estrutura e Composição de Fragmentos de Mata Atlântica Habitados por Callicebus coimbrai no Nordeste do Brasil: Subsídios para Estratégias de Manejo da Paisagem

Targeting Conservation Actions at Species Threat Response Thresholds

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