Extension of the geographic range of Ateles chamek (Primates, Atelidae): evidence of river-barrier crossing by an amazonian primate

Rabelo, Rafael M.; Silva, Felipe Ennes; Vieira, Tatiana Martins; Ferreira-Ferreira, Jefferson; Paim, Fernanda Pozzan; Dutra, Wallace; Júnior, José de Souza e Silva; Valsecchi, João

doi:10.1007/s10329-014-0409-3

Cited by 12 publications

(12 citation statements)

References 9 publications

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“…wiedii ) were more common in várzea. Várzea forests have been identified as an important habitat for preservation of a diverse range of animal groups, including fish [ 102 ], amphibians [ 65 ], primates [ 103 , 104 ] and bats [ 24 ]. However, várzeas are being constantly and consistently threatened by such human activities as hunting, and creation of areas for grazing cattle and raising crops [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

Spatial patterns of medium and large size mammal assemblages in várzea and terra firme forests, Central Amazonia, Brazil

et al. 2018

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Várzea forests account for 17% of the Amazon basin and endure an annual inundation that can reach 14 m deep during 6–8 months. This flood pulse in combination with topography directly influences the várzea vegetation cover. Assemblages of several taxa differ significantly between unflooded terra firme and flooded várzea forests, but little is known about the distribution of medium and large sized terrestrial mammals in várzea habitats. Therefore, our goal was to understand how those habitats influence mammalian species distribution during the dry season. Specifically, we: (1) compared the species composition between a terra firme (Amanã Sustainable Development Reserve) and a várzea forest (Mamirauá Sustainable Development Reserve); and (2) tested the influence of the várzea habitat classes on the number of records, occurrence and species composition of mammalian assemblages. The sampling design in each reserve consisted of 50 baited camera trap stations, with an overall sampling effort of 5015 camera trap days. We used Non-Metric Multidimension Scaling (NMDS) to compare species composition between terra firme and várzea forests, and used Generalized Linear Models (GLM) to assess how habitat types and a habitat diversity index affect mammal distributions. We recorded 21 medium and large sized mammalian species, including 20 species in terra firme and only six in várzea (3443 records). Flood pulse and isolation in várzea forest drove the dissimilarity between these two forest types. In várzea forest, medium size mammals, in general, avoided habitats associated with long flooding periods, while jaguars (Panthera onca) appeared to prefer aquatic/terrestrial transition zones. Habitats that remain dry for longer periods showed more mammalian occurrence, suggesting that dispersion via soil is important even for semi-arboreal species. This is the first study to evaluate differential use of várzea habitats by terrestrial mammalian assemblages.

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Section: Resultsmentioning

confidence: 99%

Spatial patterns of medium and large size mammal assemblages in várzea and terra firme forests, Central Amazonia, Brazil

et al. 2018

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“…Here, we consider the fluvial islands within these riverscapes as our model of habitat patches. River dynamics affects species distribution in terrestrial environments (Toivonen, Maki, & Kalliola, ) and can facilitate dispersal and influence species’ occurrence on fluvial islands (e.g., birds: Cintra, Sanaiotti, & Cohn‐Haft, ; and primates: Rabelo et al., ). Although fluvial islands can be considered ephemeral patches for species with long generation times (Shepherd & Brantley, ), we consider them appropriate patch models to test the HA hypothesis.…”

Section: Methodsmentioning

confidence: 99%

Habitat amount hypothesis and passive sampling explain mammal species composition in Amazonian river islands

et al. 2019

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Nested structures of species assemblages have been frequently associated with patch size and isolation, leading to the conclusion that colonization–extinction dynamics drives nestedness. The ‘passive sampling’ model states that the regional abundance of species randomly determines their occurrence in patches. The ‘habitat amount hypothesis’ also challenges patch size and isolation effects, arguing that they occur because of a ‘sample area effect’. Here, we (a) ask whether the structure of the mammal assemblages of fluvial islands shows a nested pattern, (b) test whether species’ regional abundance predicts species’ occurrence on islands, and (c) ask whether habitat amount in the landscape and matrix resistance to biological flow predict the islands’ species composition. We quantified nestedness and tested its significance using null models. We used a regression model to analyze whether a species’ relative regional abundance predicts its incidence on islands. We accessed islands’ species composition by an NMDS ordination and used multiple regression to evaluate how species composition responds to habitat amount and matrix resistance. The degree of nestedness did not differ from that expected by the passive sampling hypothesis. Likewise, species’ regional abundance predicted its occurrence on islands. Habitat amount successfully predicted the species composition on islands, whereas matrix resistance did not. We suggest the application of habitat amount hypothesis for predicting species composition in other patchy systems. Although the island biogeography perspective has dominated the literature, we suggest that the passive sampling perspective is more appropriate for explaining the assemblages’ structure in this and other non‐equilibrium patch systems. Abstract in Portuguese is available with online material.

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“…We have compiled the largest published dataset of A. chamek occurrence records to date, and found that the species occurs beyond the extent proposed by IUCN (Wallace et al, 2008; Supplementary Fig. 1), as recorded by Palminteri et al (2011), Rabelo et al (2014) and Santos-Filho et al (2017). However, according to our model, the species occupies only c. 28% of its extent of occurrence; this is empirically based information that should be taken into account for a species of conservation concern.…”

Section: Discussionmentioning

confidence: 92%

Predicted distribution and habitat loss for the Endangered black-faced black spider monkey Ateles chamek in the Amazon

Rabelo

Gonçalves

Silva

et al. 2018

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The rate of deforestation in the Amazon is increasing. Predictive models estimate that as a result of agricultural expansion 40% of these forests will be lost by 2050. As a consequence the habitat of forest-dwelling species such as the Endangered black-faced black spider monkey Ateles chamek is being lost, particularly along the arc of deforestation in the Brazilian Amazon. We used species distribution modelling to (1) define the distribution of this spider monkey, using environmental predictors, (2) calculate the area of this distribution covered by the protected area network, and (3) calculate the expected loss of the species’ habitat under future scenarios of deforestation. We found that the species occupies only c. 28% of its extent of occurrence. Only 32% of the species’ area of occupancy is legally protected, and the modelling suggests that 31–40% of the species’ habitat will be lost by 2050. We highlight three unprotected regions with extensive forest cover that are predicted to become severely deforested by 2050 as priority regions for expanding the protected area network. We also propose landscape management and restoration in three human-modified regions. Our study provides an example of how species distribution modelling can be applied to assess threats to species and support decision makers in implementing conservation actions.

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Extension of the geographic range of Ateles chamek (Primates, Atelidae): evidence of river-barrier crossing by an amazonian primate

Cited by 12 publications

References 9 publications

Spatial patterns of medium and large size mammal assemblages in várzea and terra firme forests, Central Amazonia, Brazil

Spatial patterns of medium and large size mammal assemblages in várzea and terra firme forests, Central Amazonia, Brazil

Habitat amount hypothesis and passive sampling explain mammal species composition in Amazonian river islands

Predicted distribution and habitat loss for the Endangered black-faced black spider monkey Ateles chamek in the Amazon

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