Reproductive constraints in frugivorous phyllostomid bats: seasonal and elevational variation in reproductive rates in the Brazilian Atlantic Forest

Carvalho, William Douglas de; Martins, Mayara Almeida; Dias, Daniela; Saldaña‐Vázquez, Romeo A.; Palmeirim, Jorge M.; Esbérard, Carlos Eduardo Lustosa

doi:10.1093/jmammal/gyz031

Cited by 13 publications

(12 citation statements)

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“…Phenological differences between high-and low-elevation populations also reflect elevated costs of rain under cooler temperatures; high-elevation birds in Cameroon reproduce during the driest months, whereas, in the same mountain range, low-elevation birds breed during wet months [77]. In many tropical highland communities, reproduction is more temporally constrained relative to low-elevation relatives and concentrated during dry seasons [12,78,79]. The prevalence of seasonal 'escape' from high-elevation wet season rains is likewise consistent with elevated energetic costs of precipitation under cooler conditions; in some bats and birds, heavy rains induce not only short-term physiological responses, but also periods of torpor or downhill migration [59,80].…”

Section: Trends Trends In In Ecology Ecology and Evolution Evolutionmentioning

confidence: 99%

“…Distributions of terrestrial animals closely match those of plant communities, and are likely shaped by combinations of direct, physiological responses to rainfall (analogous to thermal tolerances) and indirect responses mediated by species interactions [10,11]. Food availability is the most-commonly invoked mediator of indirect responses (e.g., [12,13]); rainfall seasonality influences plant phenology, which shapes temporal patterns of food availability [14]. For example, during the driest and hottest months, tropical dry forest…”

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confidence: 99%

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Hygric Niches for Tropical Endotherms

Boyle

Shogren

Brawn

2020

Trends in Ecology & Evolution

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Biotic selective pressures dominate explanations for the evolutionary ecology of tropical endotherms. Yet, abiotic factors, principally precipitation regimes, shape biogeographical and phenological patterns in tropical regions. Despite its importance, we lack a framework for understanding when, why, and how rain affects endotherms. Here, we review how tropical birds and mammals respond to rain at individual, population, and community levels, and propose a conceptual framework to interpret divergent responses. Diverse direct and indirect mechanisms underlie responses to rainfall, including physiological, top-down, and food-related drivers. Our framework constitutes a roadmap for the empirical studies required to understand the consequences of rainfall variability. Identifying the patterns and mechanisms underpinning responses to temporal variation in precipitation is crucial to anticipate consequences of anthropogenic climate change. Precipitation and Fitness in Endotherms: Missing Links HighlightsPrecipitation regimes define patterns of tropical biogeography and seasonality, and are a strong selective force on tropical taxa.

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Section: Trends Trends In In Ecology Ecology and Evolution Evolutionmentioning

confidence: 99%

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confidence: 99%

Hygric Niches for Tropical Endotherms

Boyle

Shogren

Brawn

2020

Trends in Ecology & Evolution

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“…Some previous studies have highlighted the importance of elevation as an environmental filter for Neotropical bats (Batista et al, 2021; Carvalho, Martins, Esbérard, et al, 2019; Cisneros et al, 2014; Patterson et al, 1996; Stevens, 2013). At higher elevations, species that are more adapted to low temperatures replace other species that cannot reach higher elevations (species turnover), as they will have their own functional traits, such as optional torpor, longer and denser fur, greater capacity to use natural cavities and vertical migration (Carvalho, Martins, Dias, et al, 2019; Carvalho, Martins, Esbérard, et al, 2019; Espinoza, 2006; Soriano et al, 2002). Therefore, despite the occurrence of some cold‐tolerant species in both the higher regions of the Andean Amazon and in lower areas (e.g.…”

Section: Discussionmentioning

confidence: 99%

Elevation drives taxonomic, functional and phylogenetic β‐diversity of phyllostomid bats in the Amazon biome

Carvalho

Fluck

Castro

et al. 2022

Journal of Biogeography

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Aim:We evaluated the relative importance of geographical and environment variables for taxonomic, phylogenetic and functional β-diversity of phyllostomid bats along the entire Amazon biome and specifically in the lowlands.Location: Amazon biome.Taxon: Chiroptera. Methods:We carried out a bibliographic review and compiled a wide and unprecedented database of 106 phyllostomid bat species at 102 sites throughout the Amazon biome. For all possible pairs of sites in both datasets, we estimated the Jaccard pairwise dissimilarity, that is, β-diversity, considering its three dimensions-taxonomic, phylogenetic and functional-for its two components-turnover (substitution of species) and differences in species richness. The association between dissimilarity measurements and geographical and environment variables was assessed using multiple regressions on distance matrices (MRM). Results:We found that turnover and differences in species richness had similar contributions to the taxonomic β-diversity. However, for phylogenetic and functional β-diversity, lineages and functions richness differences contribute slightly more than

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“…The reproduction of bats in the tropical region, although they do not hibernate, is influenced by abiotic factors, such as rainfall, temperature and food availability, among others (Carvalho et al, 2019). For this reason, these bats can be monoestrous, polyestrous and even reproduce continuously throughout the year (Zortéa, 2003).…”

Section: Reproduction In Batsmentioning

confidence: 99%

Morphology of the Ovaries, Uterine Tubes and Uterus ofPteronotus gymnonotus(Chiroptera: Mormoopidae)

Costa

Morais

2022

Preprint

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The present study aimed to characterize the ovarian, tubal and uterine morphology in the insectivorous bat Pteronotus gymnonotus , in specimens collected in the state of Rio Grande do Norte, Brazil. After euthanasia, these organs were histologically processed for inclusion in historesin for morphological and morphometric analysis under light microscopy. The morphological characterization of the ovaries was based on the development of the oocyte and follicle growth, while the uterine tubes were characterized in terms of their anatomy and division of their parts into: infundibulum, ampulla and isthmus, where the height of the tubal epithelium and muscle layer thickness. The analysis of the uterus was based on the formation and thickness of its three layers: endometrium, myometrium and perimetrium. Morphometric analyzes were performed by capturing images of histological slides at different magnifications. The variables were submitted to descriptive analysis, with data expressed as mean and standard deviation. It was observed that the ovaries are bilateral and oval, presenting a squamous to simple cubic epithelium, forming the germinal epithelium, certain stratification regarding the location of the ovarian follicles, where most of the primordial follicles are arranged in the peripheral region of the ovary, however being it is possible to identify many follicles in various stages of maturation in the central region ; the uterus is bicornuate and the layers of the uterus and uterine tubes observed follow the same pattern of other eutherian mammals. This information is important to allow comparisons between species, aiming at knowledge about reproductive morphology in mammals, especially those belonging to the order Chiroptera. Therefore, this research is essential to subsidize conservation measures that protect their natural populations, in an effort to maintain the ecological balance. Keywords: Insectivore bats, Reproductive biology, Ovarian morphometry, Oogenesis.

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Reproductive constraints in frugivorous phyllostomid bats: seasonal and elevational variation in reproductive rates in the Brazilian Atlantic Forest

Cited by 13 publications

References 75 publications

Hygric Niches for Tropical Endotherms

Hygric Niches for Tropical Endotherms

Elevation drives taxonomic, functional and phylogenetic β‐diversity of phyllostomid bats in the Amazon biome

Morphology of the Ovaries, Uterine Tubes and Uterus ofPteronotus gymnonotus(Chiroptera: Mormoopidae)

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