Cargando…

Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species

Neotropical leaf-nosed bats (family Phyllostomidae) are one of the most diverse mammalian families and Artibeus spp. is one of the most speciose phyllostomid genera. In spite of their species diversity, previous work on Artibeus crania using linear morphometrics has uncovered limited interspecific v...

Descripción completa

Detalles Bibliográficos
Autor principal: Hedrick, Brandon P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8280882/
https://www.ncbi.nlm.nih.gov/pubmed/34306832
http://dx.doi.org/10.7717/peerj.11777
_version_ 1783722735616131072
author Hedrick, Brandon P.
author_facet Hedrick, Brandon P.
author_sort Hedrick, Brandon P.
collection PubMed
description Neotropical leaf-nosed bats (family Phyllostomidae) are one of the most diverse mammalian families and Artibeus spp. is one of the most speciose phyllostomid genera. In spite of their species diversity, previous work on Artibeus crania using linear morphometrics has uncovered limited interspecific variation. This dearth of shape variation suggests that differences in cranial morphology are not contributing to niche partitioning across species, many of which are often found in sympatry. Using two-dimensional geometric morphometric methods on crania from eleven species from the Artibeus species complex, the current study demonstrates substantial cranial interspecific variation, sexual size and shape dimorphism, and intraspecific geographic variation. The majority of species were shown to have a unique size and shape, which suggests that each species may be taking advantage of slightly different ecological resources. Further, both sexual size and shape dimorphism were significant in the Artibeus species complex. Male and female Artibeus are known to have sex specific foraging strategies, with males eating near their roosts and females feeding further from their roosts. The presence of cranial sexual dimorphism in the Artibeus species complex, combined with previous work showing that different fruit size and hardness is correlated with different cranial shapes in phyllostomids, indicates that the males and females may be utilizing different food resources, leading to divergent cranial morphotypes. Additional field studies will be required to confirm this emergent hypothesis. Finally, significant geographical shape variation was found in a large intraspecific sample of Artibeus lituratus crania. However, this variation was not correlated with latitude and instead may be linked to local environmental factors. Additional work on ecology and behavior in the Artibeus species complex underlying the morphological variation uncovered in this study will allow for a better understanding of how the group has reached its present diversity.
format Online
Article
Text
id pubmed-8280882
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher PeerJ Inc.
record_format MEDLINE/PubMed
spelling pubmed-82808822021-07-23 Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species Hedrick, Brandon P. PeerJ Biodiversity Neotropical leaf-nosed bats (family Phyllostomidae) are one of the most diverse mammalian families and Artibeus spp. is one of the most speciose phyllostomid genera. In spite of their species diversity, previous work on Artibeus crania using linear morphometrics has uncovered limited interspecific variation. This dearth of shape variation suggests that differences in cranial morphology are not contributing to niche partitioning across species, many of which are often found in sympatry. Using two-dimensional geometric morphometric methods on crania from eleven species from the Artibeus species complex, the current study demonstrates substantial cranial interspecific variation, sexual size and shape dimorphism, and intraspecific geographic variation. The majority of species were shown to have a unique size and shape, which suggests that each species may be taking advantage of slightly different ecological resources. Further, both sexual size and shape dimorphism were significant in the Artibeus species complex. Male and female Artibeus are known to have sex specific foraging strategies, with males eating near their roosts and females feeding further from their roosts. The presence of cranial sexual dimorphism in the Artibeus species complex, combined with previous work showing that different fruit size and hardness is correlated with different cranial shapes in phyllostomids, indicates that the males and females may be utilizing different food resources, leading to divergent cranial morphotypes. Additional field studies will be required to confirm this emergent hypothesis. Finally, significant geographical shape variation was found in a large intraspecific sample of Artibeus lituratus crania. However, this variation was not correlated with latitude and instead may be linked to local environmental factors. Additional work on ecology and behavior in the Artibeus species complex underlying the morphological variation uncovered in this study will allow for a better understanding of how the group has reached its present diversity. PeerJ Inc. 2021-07-12 /pmc/articles/PMC8280882/ /pubmed/34306832 http://dx.doi.org/10.7717/peerj.11777 Text en ©2021 Hedrick 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 use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Biodiversity
Hedrick, Brandon P.
Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title_full Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title_fullStr Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title_full_unstemmed Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title_short Inter- and intraspecific variation in the Artibeus species complex demonstrates size and shape partitioning among species
title_sort inter- and intraspecific variation in the artibeus species complex demonstrates size and shape partitioning among species
topic Biodiversity
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8280882/
https://www.ncbi.nlm.nih.gov/pubmed/34306832
http://dx.doi.org/10.7717/peerj.11777
work_keys_str_mv AT hedrickbrandonp interandintraspecificvariationintheartibeusspeciescomplexdemonstratessizeandshapepartitioningamongspecies