Does urbanization impact terrestrial vertebrate ectotherms across a biodiversity hotspot?

Gainsbury, Alison M.; Santos, Eduardo Guimarães; Wiederhecker, Helga C.

doi:10.1016/j.scitotenv.2022.155446

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…To further contemporize IBT, we articulate an island trajectory based on how land development affects habitat diversity (Figure 1c), using the GDM as a reference. Species richness first increases and then decreases along a land development ontology (Gainsbury et al, 2022;Marzluff, 2008) similar to how species richness varies under the GDM with the geological ontology of islands (Whittaker et al, 2008), but this pattern may vary slightly depending on ecological and environmental context (see McKinney, 2008). As development begins, anthropogenic habitat, unsaturated with species, increases habitat diversity (Marzluff, 2008;McKinney, 2002), which is filled by immigrating species introduced via trade.…”

Section: Contemporary Island Trajectoriesmentioning

confidence: 91%

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Gleditsch

Behm

Ellers

et al. 2022

Global Ecol Biogeogr

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Aim: Island biogeography theory states that species richness increases with habitat diversity and decreases with isolation from source pools. However, ecological theory must incorporate effects of human activity to explain contemporary patterns of biodiversity. We contemporized island biogeography theory by conceptualizing island trajectories of how species richness changes over time with accelerating land development and economic trade, which increase extinction and immigration rates, respectively. With this contemporized theory, we then articulate and empirically assess expected relationships of native, introduced and total species richness with natural and anthropogenic metrics of habitat diversity and isolation from source pools. Location: Greater Caribbean region.Time period: Database finalized in 2020. Methods:We built a database of 1,042 native and introduced reptiles and amphibians (herps) for 840 Caribbean islands. For each island, we calculated natural and anthropogenic metrics of island habitat diversity and isolation from source pools and used linear model averaging to assess the expected relationships under the contemporized theory for 15 major herp clades.

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Section: Contemporary Island Trajectoriesmentioning

confidence: 91%

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Gleditsch

Behm

Ellers

et al. 2022

Global Ecol Biogeogr

View full text Add to dashboard Cite

show abstract

“…1C), using the GDM as a reference. Species richness first increases and then decreases along a land development ontology (Gainsbury et al, 2022;Marzluff, 2008) similar to how species richness varies under the GDM with the geologic ontology of islands (Whittaker et al, 2008), but this pattern may vary slightly depending on ecological and environmental context (see McKinney, 2008). As development begins, anthropogenic habitat, unsaturated with species, increases habitat diversity (Marzluff, 2008;McKinney, 2002), which is filled by immigrating species introduced via trade.…”

Section: Contemporary Island Trajectoriesmentioning

confidence: 92%

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Gleditsch

Behm

Ellers

et al. 2022

Preprint

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Human activity has greatly accelerated in the past century impacting biodiversity across the globe. To accurately explain contemporary patterns of biodiversity, classic ecological theory must be updated to incorporate the effects of this Great Acceleration on biodiversity. We contemporized island biogeographic theory (IBT) and its extension, the general dynamic model (GDM), to incorporate these effects. At their core, IBT and GDM predict positive relationships between island species richness and habitat diversity, and negative relationships between island species richness and isolation from source pools of species. Through the Great Acceleration, land development on islands has altered habitat diversity and the introduction of species through global trade has reduced island isolation. We contemporize IBT and GDM by conceptualizing trajectories of how species richness on islands will change given accelerations to land development and trade. Considering these contemporary trajectories, we provide expectations for the relationships of native, introduced, and total species richness with natural and anthropogenic metrics of habitat diversity (geographic and economic area, respectively) and isolation from source pools (geographic and economic isolation, respectively). We assessed the expectations across reptile and amphibian clades of the Caribbean islands. As expected by the contemporized theory, natural habitat diversity metrics exhibited positive relationships with both native and introduced species richness, strengthening total species richness-area relationships. Geographic isolation exhibited negative relationships with native and positive relationships with introduced species richness, weakening total species richness-isolation relationships. Economic area and isolation both exhibited negative relationships with native richness, but positive and negative relationships, respectively, with introduced richness. Total species richness relationships with economic area and isolation were also strongest in clades with many introduced species. As more species spread globally, the contemporary expectations we articulate here will increasingly predict island biogeography of the Anthropocene.

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Rural occupancy in a montane burrowing snake: the importance of thermal and microhabitat resources during the rainy season

Raya-García,

Arteaga-Tinoco

2024

Biologia

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Thermal and microhabitat resources are two fundamental requirements that affect the life history of any ectotherm. Furthering our understanding of how reptilian species meet these ecological requirements is crucial for assessing the impact of environmental and anthropogenic changes on populations. Here, we explored some fundamental aspects of the thermal and microhabitat ecology of Conopsis biserialis, a small, burrowing, and endemic earthsnake of central Mexico. The study was conducted during the rainy season in a montane site disturbed by rural activities. The mean field body temperature (Tb) of C. biserialis was 26 ± 0.6 ºC. Field Tb did not differ significantly between sex and development stages. However, we found that Tb was positively correlated with substrate, air, and under-rock temperatures (Ts, Ta, and Tr) in the rural microhabitat. Regression analysis showed that substrate and under-rock temperatures (Ts and Tr) were the parameters that best explained Tb variability in the individuals. The temperature and relative humidity under shelter did not differ significantly among shelter types and/or rock sizes. In addition to these thermal traits, earthsnakes selected and utilized six common biotic and physical elements of the rural microhabitat. Most individuals used high proportions of large and medium rocks for sheltering, and these rocks were selected around crop fences and cleared grasslands where the soil can be either covered with low vegetation or bare. Our results suggest that, during the rainy season, individuals of C. biserialis use and select some biotic and structural resources of the rural microhabitats, and were capable of actively regulating their temperature by using shelters with high values of microclimatic homogeneity.

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Does urbanization impact terrestrial vertebrate ectotherms across a biodiversity hotspot?

Cited by 6 publications

References 30 publications

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Contemporizing island biogeography theory with anthropogenic drivers of species richness

Rural occupancy in a montane burrowing snake: the importance of thermal and microhabitat resources during the rainy season

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