Vulnerability of turtles to deforestation in the Brazilian Amazon: Indicating priority areas for conservation

Fagundes, Camila Kurzmann; Vogt, Richard C.; Souza, Rodrigo Antônio de; Marco, Paulo De

doi:10.1016/j.biocon.2018.08.009

Cited by 32 publications

(27 citation statements)

References 94 publications

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“…For this, considering South America as the spatial limit, the predicted area for each AOGCM (CCSM4, MRI‐CGCM3 and GISS‐E2‐R) was calculated using binary maps and, based on the average, the final area was obtained for each species and future projections. In order to test the differences between the present and future predicted areas, we apply a linear regression with regression line constrained to a zero intercept (see De Marco Jr et al, ; Fagundes, Vogt, Souza, & De Marco Jr, ), called regression through the origin (see Eisenhauer, ). This method allows to evaluate if there is a consistent change in predicted distributional areas in the future, since the slope of the correlation represents the proportion of predicted area in the future by the area in the present.…”

Section: Methodsmentioning

confidence: 99%

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Déstro

Fernandes

Andrade

et al. 2019

Global Change Biology

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Regardless of the economic, social and environmental impacts caused by wild animal trafficking worldwide, the suitable destination of seized specimens is one of the main challenges faced by environmental managers and authorities. In Brazil, returning seized animals to the wild has been the most frequent path in population restoration programs, and has been carried out, as a priority, in areas where the animals were captured.However, in addition to the difficulty in identifying the locations of illegal captures, little scientific knowledge is available on the future viability of the source-areas to global climate change. Thus, the current work aims to evaluate the impacts of climate change on the main source-municipalities for animal trafficking in Brazil, referred to herein as source-areas. For this, using ecological niche modeling, the environmental suitability of the source-areas for illegal animal captures was evaluated in two scenarios at two different time horizons: optimistic (RCP 26) and pessimistic (RCP 85) emission scenarios in both 2050 and 2070 projections. Moreover, the source-areas were compared with the Brazilian Federal protected areas, used here as the control group. According to the results, Brazilian source-municipalities are not always the best option for maintaining the most seized species in the future simulations, and, therefore, seem not be the best option for projects that aim for the return of these animals to the wild. In this sense, despite the genetic and ecological issues inherent in translocation projects, our results suggest that population restoration programs for seized species need to be rethought, and furthermore other suitable areas could be considered for truly ensuring the survival and maintenance of overexploited populations in the long term. K E Y W O R D S animal trafficking, Ecological Niche Modeling (ENM), global warming, passerine, population restoration, reinforcement, reintroduction | 3243 DESTRO ET al.

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Section: Methodsmentioning

confidence: 99%

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Déstro

Fernandes

Andrade

et al. 2019

Global Change Biology

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“…Fungsi ekosistem akan mampu menyediakan jasa layanan ekosistem tergantung pada tingkat biodiversitas yang tersedia (Cardinale, 2011). Untuk menghindari hilangnya spesies akuatik diperlukan strategi konservasi dalam perlindungan biodiversitas perairan (Fagundes, et al 2018). Tentunya biodiversitas dan penyediaan jasa layanan ekosistem terkait erat dalam meningkatkan kekayaan spesies (Bullock, et al 2011) (Outerbridge, et al 2016).…”

Section: Pendahuluanunclassified

Peran Ekosistem Mangrove Sebagai Habitat Populasi Tuntong Laut (Batagur borneoensis, Schlegel & Muller, 1844)

Saputra¹

2019

Preprint

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Terdegradasinya ekosistem mangrove dapat menyebabkan hilangnya biodiversitas mangrove dan keseimbangan layanan ekosistem mangrove. Terganggunya fungsi layanan ekosistem berdampak pada peran mangrove dan mengakibatkan hilangnya suatu spesies. Pengaruh faktor biotik dan abiotik dapat terjadi perubahan yang dapat memberikan kontribusi berbeda terhadap peranan ekosistem mangrove sebagai habitat alaminya. Interaksi antar jenis spesies akan berdampak pada menurunnya jumlah populasi suatu spesies terutama tuntong laut, jika habitatnya terganggu. Tuntong laut mempunyai tingkat sensitifitas yang tinggi terhadap lingkungan yang tercemar, serangan predator maupun aktivitas manusia. Jasa layanan ekosistem mangrove mampu meningkatkan peran dan fungsinya terhadap masuknya zat pencemar dari bahan organik. Selain dijadikan sebagai tempat mencari makan dan tempat berlindung dari serangan predator, fungsi lain mangrove bagi tuntong laut adalah sebagai pengatur mortalitas dalam penyesuaian air yang bersalinitas tinggi. Sehingga tuntong laut mampu bertahan di sungai dan muara yang salinitasnya rendah. Oleh karena itu, kerusakan mangrove dapat mempengaruhi perubahan struktur, komposisi dan fungsi bagi tuntong laut. Peranan masyarakat dalam menjaga ekosistem mangrove sangat menentukan pola pemanfaatan lahan. Aktivitas pemanfaatan lahan perlu mempertimbangkan upaya pengelolaan secara kolektif. Upaya yang dilakukan berupa tindakan restorasi, rehabilitasi dan reklamasi. Peningkatan terhadap layanan ekosistem dievaluasi dengan penilaian terhadap indikator-indikator yang terlibat, metode kuantifikasi dan strategi pengelolaan. Sehingga dari hasil penilaian tersebut dapat memberikan sutu kebijakan dan pemahaman kepada masyarakat terhadap pengelolaan sumber daya mangrove.

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“…Like many tropical species Amazonian freshwater turtles are threatened by deforestation (Fagundes et al 2018), climate change (Eisemberg et al 2016), and unsustainable exploitation (Rachmansah et al 2020;Smith 1979). Precautionary estimates suggest that populations of the once abundant Yellow-spotted river turtle (Podocnemis unifilis) may experience severe (≥50%) and rapid (<50 years) future losses across 60% (5.3 M km 2 ) of the pan-Amazonian range (Norris et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Although the biology of and threats to P. unifilis are well documented, there is still limited evidence of the efficacy of different management options for conservation of P. unifilis (Páez et al 2015). Increased population losses are expected due to widespread and abrupt alterations in river flow patterns caused by climate change, habitat loss and hydroelectric expansion (Castello et al 2013;Eisemberg et al 2016;Fagundes et al 2018). Indeed, dams present a unique challenge to freshwater turtles in the area of reservoir formations due to irreversible submersion of nesting areas (Alho 2011;Lees et al 2016;Norris et al 2018a).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Community based actions save Yellow-spotted river turtle (Podocnemis unifilis) eggs and hatchlings flooded by rapid river level rises (v0.1)"

Chandler¹

2020

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The conservation and recovery of increasingly threatened tropical freshwater turtle populations depends on effective management plans and actions. Here we show that community-based actions saved Yellow-spotted river turtle (Podocnemis unifilis) eggs submerged by unseasonal flooding and ensured the release of hatchlings. We recovered 926 eggs and 65 premature hatchlings from 74 submerged nests at 16 flooded nesting areas along 75 km of waterways. The rescued eggs were transferred to a rearing center and incubated. Hatchlings emerged from eggs that had remained underwater for up to two days. Hatchlings were maintained in 250-500 L nursery tanks until yolk sac scars had closed. Healthy hatchlings were then immediately released around the original nesting areas. We released 599 hatchlings (60.4%) from 991 submerged eggs and hatchlings. Egg survival [61.7% (571 / 926)] was substantially less than hatchling survival [94.2% (599 / 636)] but within the expected range of values reported for this species. These findings suggest that Yellow-spotted river turtle eggs and embryos are resistant to short-term submersion, which could help explain the widespread distribution of this species across highly seasonal Amazonian rivers. Management plans should take the possible survival of submerged eggs into consideration as part of species conservation and recovery actions.

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Vulnerability of turtles to deforestation in the Brazilian Amazon: Indicating priority areas for conservation

Cited by 32 publications

References 94 publications

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Peran Ekosistem Mangrove Sebagai Habitat Populasi Tuntong Laut (Batagur borneoensis, Schlegel & Muller, 1844)

Peer Review #1 of "Community based actions save Yellow-spotted river turtle (Podocnemis unifilis) eggs and hatchlings flooded by rapid river level rises (v0.1)"

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Vulnerability of turtles to deforestation in the Brazilian Amazon: Indicating priority areas for conservation

Cited by 32 publications

References 94 publications

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Back home? Uncertainties for returning seized animals to the source‐areas under climate change

Peran Ekosistem Mangrove Sebagai Habitat Populasi Tuntong Laut (Batagur borneoensis, Schlegel &amp; Muller, 1844)

Peer Review #1 of "Community based actions save Yellow-spotted river turtle (Podocnemis unifilis) eggs and hatchlings flooded by rapid river level rises (v0.1)"

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Peran Ekosistem Mangrove Sebagai Habitat Populasi Tuntong Laut (Batagur borneoensis, Schlegel & Muller, 1844)