Cargando…

Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians

To predict the impacts of environmental change on species, we must first understand the factors that limit the present-day ranges of species. Most anuran amphibians cannot survive at elevated salinities, which may drive their distribution in coastal locations. Previous research showed that coastal H...

Descripción completa

Detalles Bibliográficos
Autores principales: Albecker, Molly A, McCoy, Michael W
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10425968/
https://www.ncbi.nlm.nih.gov/pubmed/37588621
http://dx.doi.org/10.1093/conphys/coad062
_version_ 1785089954096873472
author Albecker, Molly A
McCoy, Michael W
author_facet Albecker, Molly A
McCoy, Michael W
author_sort Albecker, Molly A
collection PubMed
description To predict the impacts of environmental change on species, we must first understand the factors that limit the present-day ranges of species. Most anuran amphibians cannot survive at elevated salinities, which may drive their distribution in coastal locations. Previous research showed that coastal Hyla cinerea are locally adapted to brackish habitats in North Carolina, USA. Although Hyla squirella and Hyla chrysoscelis both inhabit coastal wetlands nearby, they have not been observed in saline habitats. We take advantage of naturally occurring microgeographic variation in coastal wetland occupancy exhibited by these congeneric tree frog species to explore how salt exposure affects oviposition site choice, hatching success, early tadpole survival, plasma osmolality and tadpole body condition across coastal and inland locations. We observed higher survival among coastal H. cinerea tadpoles than inland H. cinerea, which corroborates previous findings. But contrary to expectations, coastal H. cinerea had lower survival than H. squirella and H. chrysoscelis, indicating that all three species may be able to persist in saline wetlands. We also observed differences in tadpole plasma osmolality across species, locations and salinities, but these differences were not associated with survival rates in salt water. Instead, coastal occupancy may be affected by stage-specific processes like higher probability of total clutch loss as shown by inland H. chrysoscelis or maladaptive egg deposition patterns as shown by inland H. squirella. Although we expected salt water to be the primary filter driving species distributions along a coastal salinity gradient, it is likely that the factors dictating anuran ranges along the coast involve stage-, species- and location-specific processes that are mediated by ecological processes and life history traits.
format Online
Article
Text
id pubmed-10425968
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Oxford University Press
record_format MEDLINE/PubMed
spelling pubmed-104259682023-08-16 Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians Albecker, Molly A McCoy, Michael W Conserv Physiol Research Article To predict the impacts of environmental change on species, we must first understand the factors that limit the present-day ranges of species. Most anuran amphibians cannot survive at elevated salinities, which may drive their distribution in coastal locations. Previous research showed that coastal Hyla cinerea are locally adapted to brackish habitats in North Carolina, USA. Although Hyla squirella and Hyla chrysoscelis both inhabit coastal wetlands nearby, they have not been observed in saline habitats. We take advantage of naturally occurring microgeographic variation in coastal wetland occupancy exhibited by these congeneric tree frog species to explore how salt exposure affects oviposition site choice, hatching success, early tadpole survival, plasma osmolality and tadpole body condition across coastal and inland locations. We observed higher survival among coastal H. cinerea tadpoles than inland H. cinerea, which corroborates previous findings. But contrary to expectations, coastal H. cinerea had lower survival than H. squirella and H. chrysoscelis, indicating that all three species may be able to persist in saline wetlands. We also observed differences in tadpole plasma osmolality across species, locations and salinities, but these differences were not associated with survival rates in salt water. Instead, coastal occupancy may be affected by stage-specific processes like higher probability of total clutch loss as shown by inland H. chrysoscelis or maladaptive egg deposition patterns as shown by inland H. squirella. Although we expected salt water to be the primary filter driving species distributions along a coastal salinity gradient, it is likely that the factors dictating anuran ranges along the coast involve stage-, species- and location-specific processes that are mediated by ecological processes and life history traits. Oxford University Press 2023-08-15 /pmc/articles/PMC10425968/ /pubmed/37588621 http://dx.doi.org/10.1093/conphys/coad062 Text en © The Author(s) 2023. Published by Oxford University Press and the Society for Experimental Biology. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Albecker, Molly A
McCoy, Michael W
Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title_full Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title_fullStr Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title_full_unstemmed Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title_short Responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
title_sort responses to saltwater exposure vary across species, populations and life stages in anuran amphibians
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10425968/
https://www.ncbi.nlm.nih.gov/pubmed/37588621
http://dx.doi.org/10.1093/conphys/coad062
work_keys_str_mv AT albeckermollya responsestosaltwaterexposurevaryacrossspeciespopulationsandlifestagesinanuranamphibians
AT mccoymichaelw responsestosaltwaterexposurevaryacrossspeciespopulationsandlifestagesinanuranamphibians