Acoustic niche partitioning in an anuran community inhabiting an Afromontane wetland (Butare, Rwanda)

Sinsch, Ulrich; Lümkemann, Katrin; Rosar, Katharina; Schwarz, Christiane; Dehling, Maximilian

doi:10.1080/15627020.2012.11407524

Cited by 51 publications

(56 citation statements)

References 3 publications

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“…The comparison of the partial 16S rRNA sequence of a specimen of Ptychadena chrysogaster with sequences from congeners corroborated its distinct specific status. Sequences from specimens of Ptychadena anchietae , Ptychadena nilotica , and Ptychadena porosissima from Rwanda differ from each other considerably by an uncorrected p distance of more than 10 % (Sinsch et al 2012, Dehling and Sinsch in press). Unfortunately, no homologous sequence of Ptychadena uzungwensis from Rwanda and only a sequence of a specimen with doubtful identity from Tanzania ( Ptychadena aff.…”

Section: Discussionmentioning

confidence: 90%

“…Branch (2005) included Rwanda in the geographic range of Ptychadena oxyrhynchus (Smith, 1849). Recently, we collected Ptychadena anchietae in Rwanda and resurrected the name Ptychadena nilotica for the populations which occur along the Nile and in Central Kenya and Tanzania and which had been formerly referred to as Rana mascareniensis or Ptychadena mascareniensis (Sinsch et al 2012, Dehling and Sinsch in press). …”

Section: Introductionmentioning

confidence: 99%

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Diversity of Ptychadena in Rwanda and taxonomic status of P. chrysogaster Laurent, 1954 (Amphibia, Anura, Ptychadenidae)

Dehling¹,

Sinsch²

2013

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We assess the diversity of Ptychadena species in Rwanda based on re-examination of voucher specimens in museum collections and our own data from recent assessment of the species composition of amphibian communities in Rwanda. We recognize five species which we allocate to the following available names: P. anchietae, P. chrysogaster, P. nilotica, P. porosissima, and P. uzungwensis. We did not find evidence for the presence of P. grandisonae and P. oxyrhynchus which have been listed for the country. The five species can be distinguished by quantitative morphometrics (discriminant analysis, success rate: 100 %) and a number of qualitative characters of external morphology. We provide an identification key to the Rwandan species and describe the morphology of each species in detail. The taxonomic status and the phylogenetic position of Ptychadena chrysogaster are further assessed based on the partial sequence of the mitochondrial 16S rRNA. The species differs genetically from available homologous sequences from congeners by an uncorrected p distance of at least 4.2 % and appears to be most closely related to specimens assigned to P. porosissima, P. mahnerti, “P. aff. uzungwensis” and “P. aff. bibroni”.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Diversity of Ptychadena in Rwanda and taxonomic status of P. chrysogaster Laurent, 1954 (Amphibia, Anura, Ptychadenidae)

Dehling¹,

Sinsch²

2013

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“…We might have failed to record these species due to incomplete sampling and acknowledge potential biases introduced by our field methodologies (e.g., not sampling at night and not sampling deeper water where X. wittei might be found). To more thoroughly understand patterns of anuran diversity in VNP and to get a complete record of all species present, we will need to find ways to address issues of unequal detection probability (e.g., as addressed by Sinsch et al ()), and increase our sampling efforts toward a more complete sampling across seasons and hours of the day. Most anuran species show seasonal variation in activity (Goyannes‐Araújo et al, ; Moreira & Barreto, ), and not taking this into account might lead to underestimates of richness, diversity, and especially abundance.…”

Section: Discussionmentioning

confidence: 99%

“…Most anuran species show seasonal variation in activity (Goyannes‐Araújo et al, ; Moreira & Barreto, ), and not taking this into account might lead to underestimates of richness, diversity, and especially abundance. Sampling at dusk or night would similarly allow us to gather more complete data on anuran presence (Sinsch et al, ), but is now limited due to logistic restrictions. One possible solution to logistic limitations to nocturnal surveys would be to conduct automated acoustic sampling, which would not require our presence in the field at night (Acevedo & Villanueva‐Rivera, ).…”

Section: Discussionmentioning

confidence: 99%

Spatial variation in anuran richness, diversity, and abundance across montane wetland habitat in Volcanoes National Park, Rwanda

Hoek

Tuyisingize

Eckardt

et al. 2019

Ecology and Evolution

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The spatial distribution of species has long sparked interest among ecologists and biogeographers, increasingly so in studies of species responses to climate change. However, field studies on spatial patterns of distribution, useful to inform conservation actions at local scales, are still lacking for many regions, especially the tropics. We studied elevational trends and species‐area relationships among anurans in wetland habitats within Volcanoes National Park (VNP) in Rwanda, part of the biodiverse Albertine Rift region. In VNP, wetlands are key sites for anuran reproduction, and anurans are likely threatened by wetland desiccation which has occurred for the last few decades. Between 2012 and 2017, we sampled anuran communities in ten VNP wetlands located along an elevational gradient of c. 600 m (from 2,546 to 3,188 m a.s.l.) and found at least eight species, including at least two Albertine Rift Endemics. We show that species richness, diversity, and abundance likely decline with a decrease in wetland size and with an increase in elevation, though additional sampling (e.g., at night) might be needed to derive definite conclusions. Larger wetlands at lower elevations contained most species and individuals, which indicates the potential threat of wetland size reduction (through desiccation) for anuran conservation. However, we also found that wetlands differed in species composition and that some species (e.g., Sclerophrys kisoloensis ) were likely restricted in distribution to only a few of the smaller wetlands—suggesting that the conservation of each individual wetland should be prioritized, regardless of size. We propose that all wetlands in VNP require additional conservation measures, which should be based on knowledge gathered through long‐term monitoring of anuran communities and research on drivers of wetland decline. Only such extended research will allow us to understand the response of anurans in VNP to threats such as climate change and wetland desiccation.

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“…Data, Sinsch et al 2011, 2012). Four of the Rwandan Hyperolius ( Hyperolius castaneus , Hyperolius discodactylys , Hyperolius frontalis , and Hyperolius jackie ) have been recorded in cloud forests of the Nyungwe National Park (Dehling 2012, unpubl.…”

Section: Discussionmentioning

confidence: 99%

Embryogenesis and tadpole description of Hyperolius castaneus Ahl, 1931 and H. jackie Dehling, 2012 (Anura, Hyperoliidae) from montane bog pools

Lehr

Dehling

Greenbaum

et al. 2015

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Tadpoles of Hyperolius castaneus and Hyperolius jackie were found in the Nyungwe National Park in Rwanda and adjacent areas. Tadpoles of both species were identified by DNA-barcoding. At the shore of a bog pool three clutches of Hyperolius castaneus of apparently different age, all laid on moss pads (Polytrichum commune, Isotachis aubertii) or grass tussocks (Andropogon shirensis) 2–5 cm above the water level, were found. One clutch of Hyperolius castaneus was infested by larval dipterid flies. The most recently laid clutch contained about 20 eggs within a broad egg-jelly envelope. The eggs were attached to single blades of a tussock and distributed over a vertical distance of 8 cm. A pair of Hyperolius castaneus found in axillary amplexus was transported in a plastic container to the lab for observation. The pair deposited a total of 57 eggs (15 eggs attached to the upper wall of the transport container, 42 eggs floated in the water). Embryogenesis of the clutch was monitored in the plastic container at 20 ± 2 °C (air temperature) and documented by photos until Gosner Stage 25. The description of the tadpole of Hyperolius castaneus is based on a Gosner Stage 29 individual from a series of 57 tadpoles (Gosner stages 25–41). The description of the tadpole of Hyperolius jackie is based on a Gosner Stage 32 individual from a series of 43 tadpoles (Gosner stages 25–41). Egg laying behavior and embryogenesis are unknown for Hyperolius jackie. The labial tooth row formula for both species is 1/3(1) with a narrow median gap of the tooth row. Variation in external morphology was observed in size and labial tooth row formula within the species. With the tadpole descriptions of Hyperolius castaneus and Hyperolius jackie, 36 tadpoles of the 135 known Hyperolius species have been described, including five of the eleven Hyperolius species known from Rwanda.

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Acoustic niche partitioning in an anuran community inhabiting an Afromontane wetland (Butare, Rwanda)

Cited by 51 publications

References 3 publications

Diversity of Ptychadena in Rwanda and taxonomic status of P. chrysogaster Laurent, 1954 (Amphibia, Anura, Ptychadenidae)

Diversity of Ptychadena in Rwanda and taxonomic status of P. chrysogaster Laurent, 1954 (Amphibia, Anura, Ptychadenidae)

Spatial variation in anuran richness, diversity, and abundance across montane wetland habitat in Volcanoes National Park, Rwanda

Embryogenesis and tadpole description of Hyperolius castaneus Ahl, 1931 and H. jackie Dehling, 2012 (Anura, Hyperoliidae) from montane bog pools

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