Abundance and composition of forest‐dwelling anurans in cashew plantations in a tropical semi‐evergreen forest landscape

Komanduri, Krishna Pavan Kumar; Sreedharan, Gayathri; Vasudevan, Karthikeyan

doi:10.1111/btp.13210

Cited by 12 publications

(11 citation statements)

References 76 publications

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“…For instance, forest conversion into cashew monocultures entails a loss of the structural horizontal and vertical multilayer complexity besides the seasonal removal of understory vegetation (Temudo & Abrantes 2014; Komanduri et al 2023). Cashew orchards are therefore thought to sustain either lower species diversity or, at least, different species composition than nearby forests, as evidenced for butter ies (Vasconcelos et al 2015), anurans (Komanduri et al 2023) and mammals (Rege et al 2020). Cultivating rice in the naturally open-area habitats of these savannah-forest landscapes is expected to lead to fewer mammal community changes compared to the conversion of forests into cashew orchards.…”

Section: Introductionmentioning

confidence: 99%

“…Habitat quality tends to be higher under lower structural and compositional contrasts compared with the originally undisturbed habitat (Arroyo-Rodríguez et al 2020; Almeida-Maués et al 2022). For instance, forest conversion into cashew monocultures entails a loss of the structural horizontal and vertical multilayer complexity besides the seasonal removal of understory vegetation (Temudo & Abrantes 2014; Komanduri et al 2023). Cashew orchards are therefore thought to sustain either lower species diversity or, at least, different species composition than nearby forests, as evidenced for butter ies (Vasconcelos et al 2015), anurans (Komanduri et al 2023) and mammals (Rege et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Mammals’ use of forest-cashew-rice mosaics in West Africa is modulated by their trophic guild

Fernàndez,

Dabo,

Silva

et al. 2024

Preprint

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Over millennia, mammals have co-existed with humans across the forest-savannah mosaics characterising part of West Africa. While some savannahs have long been used for rice cultivation in Guinea-Bissau, both those and forests are now being rapidly converted into cashew monocultures. To understand how species cope with such land-use changes, we investigated how mammals make use of forest patches, cashew orchards and rice paddies over two contrasting periods: at the start and at the end of the rainy season. Using camera-trapping, we examined mammal diversity and trophic guild activity across seven landscapes, each comprising three sampling sites located on each of the habitat types in Northern Guinea-Bissau. Based on 937 records from 21 species, species richness and activity were similar across habitat types, but generally higher at the end-rainy season. Species composition differed between the two forestry habitats and rice paddies. At the guild-level, carnivores increased in activity in forests at the start-rainy season, activity decreased in cashew orchards at the end-rainy season for insectivores and at the start-rainy season for herbivores, and omnivores increased in activity in cashew orchards. The similar assemblage-wide diversity across habitat types seems to be enabled by the high habitat heterogeneity but likely offset by previous extinctions from the area. Yet, guild-level habitat use suggested that cashew orchards might not sustain functionally healthy mammal assemblages. Habitat change is expected to become more detrimental under drier climates. Limiting cashew expansion while preserving forests is essential to optimize the long-term conservation of mammal diversity in rural West Africa.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mammals’ use of forest-cashew-rice mosaics in West Africa is modulated by their trophic guild

Fernàndez,

Dabo,

Silva

et al. 2024

Preprint

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“…Amphibians on these rock outcrops are an excellent system to understand the species- and community-level responses to different forms of agriculture. While previous studies have examined the impacts of agroforestry plantations on forest-dwelling amphibians (Komanduri et al, 2023; Sankararaman et al, 2021), such information is lacking for open ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Orchards and paddy differentially impact rock outcrop amphibians: Insights from community- and species-level responses

Jithin,

Rane,

Watve

et al. 2023

Preprint

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With agricultural demands increasing globally, determining the nature of impacts of different forms of agriculture on biodiversity, especially for threatened vertebrates and habitats, is critical to inform land management. We determined the impacts of converting rock outcrops (a habitat more threatened than rainforests) to orchards and paddy on anurans in the Western Ghats biodiversity hotspot. We sampled 50 belt transects four times across four sites during the rainy season and recorded information on amphibians and their microhabitats. We determined community-level responses using Hill numbers, beta-diversity measures, and non-metric multidimensional scaling, and species-level responses using joint species distribution modelling. Converting rock outcrops to paddy and orchards significantly altered microhabitat availability. Conversion to paddy mostly had community-level impacts, i.e., lowered species richness and more nested communities, whereas conversion to orchards mostly had species-level impacts, i.e., lowered species occurrence, highlighting the differential impacts of different forms of agriculture on amphibians and the need to determine impacts of land-use change on communities and species concurrently. We show that large rock pools are critical microhabitats for anurans as they serve as a refuge and protect anurans from desiccation during dry spells, which may be prolonged by climate change. Since rock outcrop habitats in low elevations are rapidly being converted to orchards, efforts are needed to conserve them in partnership with local communities, the custodians of these habitats. Our findings demonstrate that different forms of agriculture can have divergent impacts on biodiversity, and determining their impacts may require assessments at multiple scales, from species to communities.HIGHLIGHTSOrchard and paddy conversions affect anurans and their microhabitats on rock outcropsConversion to paddy has community-level impacts, i.e., reduced diversityConversion to orchards has species-level impacts, i.e., lowered species occurrenceRock pools, an important habitat for outcrop anurans, must be preserved or createdThere is a need to study species-and community-level impacts simultaneously

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“…For example, habitat use is one of the fundamental parameters in the ecology and conservation of species. Descriptive data on habitat use by anurans have been generated for some tropical communities, including some recent analyses (e.g., Barroso de Andrade, 2019;Zumbado-Ulate et al, 2021;Komanduri et al, 2023). However, for many other communities, information on habitat use is scarce (Prado et al, 2005;Arguedas et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

USO DEL HÁBITAT POR Agalychnis Annae (ANURA: HYLIDAE) EN UN ESPACIO VERDE URBANO EN COSTA RICA.

Arguedas Porras,

Mora,

Barquero

2023

Rev Latin Herp

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La información sobre el uso del hábitat de varios hílidos, como Agalychnis annae, es limitada. Esta especie se reproduce en estanques y requiere la presencia de plantas cerca de pequeños cuerpos de agua para una reproducción exitosa. El objetivo de esta investigación fue examinar los aspectos básicos del uso del hábitat por parte de Agalychnis annae. Estudiamos una población de esta especie en la laguna natural del Zoológico Nacional Simón Bolívar, San José, Costa Rica. Encontramos que los individuos prefieren diferentes tipos de perchas según la categoría de sexo/edad, observándose un mayor número de hembras adultas y juveniles en las hojas y más machos adultos en los tallos. La ubicación en el sustrato, así como la altura a la que se posaron los individuos de cada categoría de sexo/edad, fue similar. Encontramos una mayor proporción de individuos tanto juveniles como adultos en dos gramíneas (Cyperus involucratus y Coix lacryma-jobi). Encontramos masas de huevos en siete especies de plantas, pero la mayoría ubicadas en Coix lacryma-jobi y un bambú (Rhipidocladum racemiflorum). Es posible que Agalychnis annae elija la vegetación para la oviposición en función de su estructura en vez de su abundancia. De manera similar, el hallazgo de que las hembras prefieren las hojas a los tallos para poner huevos puede explicarse por el área de superficie y el soporte que ofrece una hoja en comparación con un tallo. Estos hallazgos proporcionan información valiosa sobre las preferencias de hábitat y el comportamiento reproductivo de Agalychnis annae, y pueden contribuir a futuras estrategias de manejo y conservación para esta especie.

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Abundance and composition of forest‐dwelling anurans in cashew plantations in a tropical semi‐evergreen forest landscape

Abstract: Human-induced alteration of landscapes has been a primary driver for

Cited by 12 publications

References 76 publications

Mammals’ use of forest-cashew-rice mosaics in West Africa is modulated by their trophic guild

Mammals’ use of forest-cashew-rice mosaics in West Africa is modulated by their trophic guild

Orchards and paddy differentially impact rock outcrop amphibians: Insights from community- and species-level responses

USO DEL HÁBITAT POR Agalychnis Annae (ANURA: HYLIDAE) EN UN ESPACIO VERDE URBANO EN COSTA RICA.

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