Daily Movement and Microhabitat Use by the Blacksmith Treefrog<i>Hypsiboas faber</i>(Anura: Hylidae) during the Breeding Season in a Subtemperate Forest of Southern Brazil

Oliveira, Mateus de; Aver, Gustavo Francisco; Moreira, Leonardo Felipe Bairos; Colombo, Patrick; Tozetti, Alexandro Marques

doi:10.2994/sajh-d-16-00017.1

Cited by 18 publications

(13 citation statements)

References 45 publications

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“…To date, the vast majority of studies on amphibian space use focused on migratory behavior of temperate amphibians characteristic of the seasonal and lifetime spatio-temporal scale, e.g., the synchronized mass migration from winter habitats to breeding sites, return migrations of adults between different parts of the habitat or dispersal of juveniles (e.g., Heusser, 1968;Sztatecsny & Schabetsberger, 2005;Sinsch et al, 2012) (for reviews see Richards, Sinsch & Alford, 1994;Sinsch, 2010;Pittman, Osbourn & Semlitsch, 2014;Sinsch 2014). Tropical amphibians show much more diverse reproductive and spatial behaviors, such as long-term site fidelity, territoriality, courtship, and offspring transport (Wells, 2007;Summers & Tumulty, 2014) but very few studies have quantified the fine-scale movements of tropical amphibians (Brown et al, 2006;Oliveira et al, 2016;Ward-Fear, Greenlees & Shine, 2016;Pettit, Greenlees & Shine, 2017).…”

Section: Introductionmentioning

confidence: 99%

Reproductive behavior drives female space use in a sedentary Neotropical frog

Fischer

Ringler

et al. 2020

PeerJ

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Longer-range movements of anuran amphibians such as mass migrations and habitat invasion have received a lot of attention, but fine-scale spatial behavior remains largely understudied. This gap is especially striking for species that show long-term site fidelity and display their whole behavioral repertoire in a small area. Studying fine-scale movement with conventional capture-mark-recapture techniques is difficult in inconspicuous amphibians: individuals are hard to find, repeated captures might affect their behavior and the number of data points is too low to allow a detailed interpretation of individual space use and time budgeting. In this study, we overcame these limitations by equipping females of the Brilliant-Thighed Poison Frog (Allobates femoralis) with a tag allowing frequent monitoring of their location and behavior. Neotropical poison frogs are well known for their complex behavior and diverse reproductive and parental care strategies. Although the ecology and behavior of the polygamous leaf-litter frog Allobates femoralis is well studied, little is known about the fine-scale space use of the non-territorial females who do not engage in acoustic and visual displays. We tracked 17 females for 6 to 17 days using a harmonic direction finder to provide the first precise analysis of female space use in this species. Females moved on average 1 m per hour and the fastest movement, over 20 m per hour, was related to a subsequent mating event. Traveled distances and activity patterns on days of courtship and mating differed considerably from days without reproduction. Frogs moved more on days with lower temperature and more precipitation, but mating seemed to be the main trigger for female movement. We observed 21 courtships of 12 tagged females. For seven females, we observed two consecutive mating events. Estimated home ranges after 14 days varied considerably between individuals and courtship and mating associated space use made up for ∼30% of the home range. Allobates femoralis females spent large parts of their time in one to three small centers of use. Females did not adjust their time or space use to the density of males in their surroundings and did not show wide-ranging exploratory behavior. Our study demonstrates how tracking combined with detailed behavioral observations can reveal the patterns and drivers of fine-scale spatial behavior in sedentary species.

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Section: Introductionmentioning

confidence: 99%

Reproductive behavior drives female space use in a sedentary Neotropical frog

Fischer

Ringler

et al. 2020

PeerJ

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“…Although there is a gap in the knowledge of the spatial ecology of neotropical amphibians, species larger than Physalaemus show, in general, low mobility (Tozetti & Toledo 2005;Oliveira et al 2016). Moreover, the grassland matrix is unfavourable for amphibian displacement due to the degree of exposure to predators and desiccation risk (Rothermel & Semlitsch 2002;Lion et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Trophic ecology of two amphibian species in patches and core forest of Atlantic Forest: A dietary and isotopic approach

Oliveira

Moser²,

Rebelato

et al. 2021

Austral Ecology

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Species richness and abundance, as well as trophic relationships, are affected by habitat configuration. Smaller habitat patches suffer greater external interference, being more susceptible to diversity loss and could also receive more trophic subsidies from outside or matrix, which can favour the maintenance of populations even in small patches. Natural mosaics of forest patches in a grassland matrix in southern Brazil are good places to analyse such a process. Our objective was to analyse the effect of habitat patching on trophic relationships based on the evaluation of two forest amphibian species (Physalaemus lisei and P. carrizorum) and compare those from habitat patches versus core/contiguous habitat. We compared isotopic carbon (d 13 C) and nitrogen ratios (d 15 N) in two anuran species as well the variation in their diet at different forest patch sizes. We chose carbon isotopes since they act as a proxy for inferences on the original habitat from which the matter flows towards the anurans, while nitrogen reveals their tropic level. Our results revealed that trophic sources for these amphibians derives predominantly from primary forest productivity. However, Physalaemus lisei d 13 C values indicated that the contribution of grassland trophic sources in the diet was higher in frogs from forests patches (<100 ha) than in those from core forest habitat. In smaller patches, P. lisei consumed predominantly ants, which was the most abundant prey on habitat. On the other hand, in the core forest, where isopods were the most abundant prey, most of its consumption was beetles, spiders and ants. In contrast, P. carrizorum showed no significant changes in isotopic ratios or diet across habitats. Isotopic data suggested that both species occupied lower trophic levels in smaller forests than in core forests. Our data showed a tendency towards the increase of grassland contribution and decrease of amphibian trophic position in patched habitats in comparison to continuous habitat.

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“…Distance between ponds and to the nearest forest fragment may be spatially structured and associated with the dispersion of individuals [29,66]. Indeed, other ponds and closely-located forest patches may function as a temporary refuge or permanent site (as the case of species that show high site fidelity) [67] for feeding and thermoregulation [68,69], and seem to be essential for maintaining richness and abundance of anurans in local communities across a variety of regions (e.g. Europe - [70]; North America - [32]; South America - [66]).…”

Section: Environmental Predictors and Anuran Beta Diversitymentioning

confidence: 99%

Taxonomic and functional anuran beta diversity of a subtropical metacommunity respond differentially to environmental and spatial predictors

Dalmolin

Tozetti

Pereira

2019

Preprint

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The relative contributions of environmental and spatial predictors in the patterns of taxonomic and functional anuran beta diversity were examined in 33 ponds of a metacommunity along the coast of south Brazil. Anurans exhibit limited dispersion ability and have physiological and behavioural characteristics that narrow their relationships with both environmental and spatial predictors. So, we expected that neutral processes and, in particular, niche-based processes could have similar influence on the taxonomic and functional beta diversity patterns. Variation partitioning and distance-based methods (db-RDA) were conducted with presence/absence and abundance data to examine taxonomic and functional facets and components (total, turnover and nestedness-resultant) in relation to environmental and spatial predictors.Processes determining metacommunity structure were similar between the components of beta diversity but differed among taxonomic and functional diversity.While taxonomic beta diversity was further accounted by environmental predictors, functional beta diversity responded more strongly to spatial predictors. These patterns were more evident when assessed through abundance data. These opposing patternswere contrary to what we had predicted, suggesting that while there is a taxonomic turnover mediated by environmental filters, the spatial distance promotes the trait dissimilarity between sites. Our results reinforce the idea that studies aiming to evaluate the patterns of structure in metacommunities should include different facets of diversity so that better interpretations can be achieved. Material and Methods Ethics statementCollection permits were provided by Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) (authorization 55409). Field studies did not involve endangered or protected species. We restricted manipulation of animals in the field to minimal as we sampled just specimes restricted in the collection units (see the section 2.3). Specimens collected were identified, measured and immediately released after these procedures in the same pond where they were sampled. All sampling procedures were reviewed and specifically approved as part of obtaining the field permits by ICMBio (see above). Study AreaThis study was done in Lagoa do Peixe National Park (PNLP; 31°02_-31°48_S; 50°77_-51°15_W; figure 1), the only Ramsar site in southern Brazil [43]. With a length of 64 km and an average width of 6 km, the PNLP comprises over 34,000 hectares of protected wetlands, integrating the Coastal Plain of the State of Rio Grande do Sul, one of the regions of southern Brazil with higher concentration of wetlands [44].The climate is subtropical humid, and temperatures range between 13 °C and 24 °C with annual average of 17.5 °C. The mean annual precipitation varies between 1200 and 1500 mm [45].

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Daily Movement and Microhabitat Use by the Blacksmith TreefrogHypsiboas faber(Anura: Hylidae) during the Breeding Season in a Subtemperate Forest of Southern Brazil

Cited by 18 publications

References 45 publications

Reproductive behavior drives female space use in a sedentary Neotropical frog

Reproductive behavior drives female space use in a sedentary Neotropical frog

Trophic ecology of two amphibian species in patches and core forest of Atlantic Forest: A dietary and isotopic approach

Taxonomic and functional anuran beta diversity of a subtropical metacommunity respond differentially to environmental and spatial predictors

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