Altitude and temperature drive anuran community assembly in a Neotropical mountain region

Matavelli, Rodrigo; Oliveira, Juliano Machado; Soininen, Janne; Ribeiro, Milton Cezar; Bertoluci, Jaime

doi:10.1111/btp.13074

Cited by 3 publications

(1 citation statement)

References 181 publications

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“…Community‐level elevation trends in the diversity of rainforest amphibians may be driven by the abiotic environment, particularly temperature (Matavelli et al., 2022), or its combination with biotic factors, including food supply (Supriya et al., 2019) and predation pressure (frog‐eating snakes are more diverse at lower altitudes in New Guinea: Tallowin et al., 2017). The dominance of abiotic drivers would lead to a monotonous decline in amphibian diversity with elevation, while biotic factors would generate a mid‐elevation peak in diversity, either mirroring the trend in food supply, represented by insect abundance (Supriya et al., 2019), or resulting from a combination of high predation pressure at low elevations (by e.g.…”

Section: Introductionmentioning

confidence: 99%

Local and regional diversity of frog communities along an extensive rainforest elevation gradient in Papua New Guinea

Dahl,

Richards,

Basien

et al. 2023

Biotropica

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Rainforests on high tropical mountains are globally important species diversity hotspots. We studied amphibians along an extensive rainforest elevation gradient on Mt. Wilhelm (4509 m) in Papua New Guinea. We established eight sites at 500 m elevation increments between 200 and 3700 m a.s.l. and relate their community composition to the known species pool of New Guinea island. We recorded 3390 frogs from 55 species, which is three times more species than at any local community along the elevation gradient. Species diversity peaked at 1700 m a.s.l. for Mt. Wilhelm communities, and at 500–1100 m a.s.l. in the broader New Guinea fauna, probably reflecting increasing speciation and decreasing dispersal rates with increasing elevation. The beta diversity between frog communities was high and increased with increasing elevation. The change in frog community composition across 500 m elevation corresponded to the change over 200 km distance within lowland forests. A majority of frog species were distributed over narrow <500 m elevational ranges, at Mt Wilhelm and the New Guinea fauna more broadly. We did not detect Rapoport's pattern of wider elevation range for species at higher elevations than for lowland species, for Mt. Wilhelm communities or the New Guinea fauna. The high beta diversity patterns along elevation gradients generated by rapid species turnover with narrow elevation ranges make frog communities vulnerable to change in environment, including climate change.Abstract in Melanesian Pidgin is available with online material.

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Section: Introductionmentioning

confidence: 99%

Local and regional diversity of frog communities along an extensive rainforest elevation gradient in Papua New Guinea

Dahl,

Richards,

Basien

et al. 2023

Biotropica

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Topography and climate of Mount Karanfil (Pozantı/Adana)

Çetin

Meydan

2023

Environ Syst Res

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The goal of this study is to investigate the impact of the topographic features of Mount Karanfil and its surroundings on the local climate. Mount Karanfil, located in the Mediterranean Basin, has a unique ecological position due to its topography. This study analyzed temperature, precipitation, and wind conditions at Mount Karanfil from 1980 to 2018 using data from the General Directorate of Meteorology (MGM). The temperature indices were calculated using the Clima data and the ArcGIS v10.5 software package. The temperature indices series was analyzed using cluster analysis in ArcGIS v10.5 before being used to calculate the maximum and minimum temperature and precipitation values for each month. The spatial estimation method IDW interpolation was then applied to these data. The initial analysis showed significant differences in temperature, precipitation, and wind conditions between this location and others. This may be due to the southern aspect of the landscape, which receives more precipitation than other slopes and is affected by south-oriented sectoral winds that bring abundant precipitation to the southern slopes. The results of the temperature indices analysis showed that evaporation tends to increase on hot days with high maximum temperatures compared to days with low minimum temperatures. The Emberger bioclimatic index also confirmed the typical Mediterranean climate of mild, rainy winters and hot, dry summers. In addition to the regional climate and geology, the geomorphologic conditions of the mountainous mass and the specific valley profiles of the Ecemis stream and Cakıt stream (such as the strait valley) were found to influence the local climate. These valley profiles, which are composed of narrow and deep dolomitic and limestone layers, showed differences in climate due to their slope, elevation, and aspect, as analyzed using digital elevation models with a resolution of 10–20 m. These topographic analyses revealed that elevation decreases and humidity increases in alluvial valley floors.

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Diversity, Distribution, and Habitat Association of Anuran Species from Keffa, Southwest Ethiopia

et al. 2023

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The aim of the current study was to provide a description of the species composition and habitat association of anuran species found in the Keffa area of southwest Ethiopia, among the least studied natural areas in Ethiopia. Data were gathered in both the rainy and dry seasons. Opportunistic observations, audio, and visual encounters were used to perform the survey. To capture different frog species, drift fence and pitfall trap techniques were used. Three habitat types—wetlands, agricultural land, and riverine forests—were explored for the frog species. A total of 3672-person field hours were spent and 5678 individuals of 26 different anuran species from eight different families were recorded. Of these, six species were new records for the Keffa area. Species determination was assessed using morphology and validated with genetic barcoding. The mitochondrial 16S rRNA and COI gene sequence analysis have been used in molecular systematic analyses of the frog species. The Leptopelis ragazzii that was discovered to be present in the earlier study was actually Leptopelis vannutellii, as evidenced by DNA sequencing. The Hyperolius individuals were initially categorized as H. nasutus, but after conducting DNA barcoding, they were found to be H. microps. At least three potential new candidate species (Leptopelis sp. 1, Leptopelis sp. 2, and Phrynobatrachus sp. 1) were discovered. Hyperoliidae was the most abundant family from the recorded anurans, followed by Phrynobatrachidae, while Conrauidae was the least abundant. Most species were found in the wetland habitat, followed by riverine forest, while agricultural land had the least. Wetlands had the highest values for the Shannon diversity index (2.131), followed by agricultural land (1.58) and riverine forests (1.459). The environmental variables revealed that temperature had a considerable negative impact, while precipitation had a non-significantly positive relationship with anuran abundance. The Keffa area is rich in frog species, accounting for 35% of the country’s batrachofauna. However, the habitats have been fragmented and ruined by agricultural expansion, water drainage from the wetlands, and the conversion of horticulture to field crops. We recommend that non-governmental organizations, districts, regional officials, and local people in and around Keffa actively engage in wetland and forest conservation and protection.

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Altitude and temperature drive anuran community assembly in a Neotropical mountain region

Cited by 3 publications

References 181 publications

Local and regional diversity of frog communities along an extensive rainforest elevation gradient in Papua New Guinea

Local and regional diversity of frog communities along an extensive rainforest elevation gradient in Papua New Guinea

Topography and climate of Mount Karanfil (Pozantı/Adana)

Diversity, Distribution, and Habitat Association of Anuran Species from Keffa, Southwest Ethiopia

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