Shengnan YANG,Chunlan ZHANG,Wenbo LIAO,et al.Trophic Niche Shifts in Mountain Feirana Frogs under Human-mediated Habitat Transformations[J].Asian Herpetological Research(AHR),2021,12(2):234-241.[doi:10.16373/j.cnki.ahr.200114]
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Trophic Niche Shifts in Mountain Feirana Frogs under Human-mediated Habitat Transformations
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Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

Issue:
2021 VoI.12 No.2
Page:
234-241
Research Field:
Publishing date:
2021-06-25

Info

Title:
Trophic Niche Shifts in Mountain Feirana Frogs under Human-mediated Habitat Transformations
Author(s):
Shengnan YANG1;  Chunlan ZHANG2*;  Wenbo LIAO3;  Na LI1; 4;  Junhua HU1
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
2 Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, Guangdong, China
3 Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637000, Sichuan, China
4 CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
Keywords:
amphibians;  habitat transformation;  habitat type;  stable isotopes;  trophic niche width;  urbanization
PACS:
-
DOI:
10.16373/j.cnki.ahr.200114
Abstract:
Urbanization can induce environmental changes, disturbing habitat transformation process, and resulting in niche shift of species and local extinctions. Amphibians have experienced worldwide population declines, with habitat loss acting as one of the most disruptive causes. How amphibian species response to changing habitats could be reflected in their utilization and assimilation of resources. Using stable isotopes, we explored trophic niche variation between natural and transformed habitats for three closely related frog species in the genus Feirana (F. quadranus, F. taihangnica and F. kangxianensis). Our results indicated that the δ13C value was negatively correlated with body size (snout-vent length) and the δ15N value increased along with the ontogenetic process. The δ13C values were significantly different among habitat types, and the variation of δ15N values was relatively limited in different disturbed gradients. Urban groups displayed broader trophic niche width than both rural and natural groups. When species in sympatry, their resource utilization and trophic niche overlap probability were more similar in rural habitats than their natural counterparts. Our findings would be conducive to understand trophic niche and function variation in amphibians during the urbanization process, allowing for effective predictions of ecological consequences of habitat transformation. This study can also provide insight into conservation strategies for mountain amphibians in the Anthropocene.

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Last Update: 2021-06-25