Ecological traits of the franciscana dolphin (<i>Pontoporia blainvillei</i>) from the Late Pleistocene to the present days based on stable isotope analysis-Reference-Cited by-同舟云学术

Ecological traits of the franciscana dolphin (Pontoporia blainvillei) from the Late Pleistocene to the present days based on stable isotope analysis

Published:2023-06-26 Issue:4 Volume:39 Page:1106-1120
ISSN:0824-0469
Container-title:Marine Mammal Science
language:en
Short-container-title:Marine Mammal Science

Author:

Carrasco Thayara S.¹²^ORCID,de Lima Renan C.³⁴^ORCID,da Mota Gabriel S.⁵,Botta Silvina⁴^ORCID,Secchi Eduardo R.⁴^ORCID,Ribeiro Ana Maria⁶^ORCID,Ferigolo Jorge⁶^ORCID,Buchmann Francisco S.¹²

Affiliation:

1. Programa de Pós‐graduação em Biodiversidade de Ambientes Costeiros, Instituto de Biociências Universidade Estadual Paulista São Vicente Brazil

2. Laboratório de Estratigrafia e Paleontologia, Instituto de Biociências Universidade Estadual Paulista São Vicente Brazil

3. Programa de Pós‐graduação em Oceanografia Biológica, Instituto de Oceanografia Universidade Federal do Rio Grande Rio Grande Brazil

4. Laboratório de Ecologia e Conservação da Megafauna Marinha, Instituto de Oceanografia Universidade Federal do Rio Grande Rio Grande Brazil

5. Programa de Pós‐graduação em Geografia Física, Departamento de Geografia Universidade de São Paulo São Paulo Brazil

6. Museu de Ciências Naturais Secretaria do Meio Ambiente e Infraestrutura Porto Alegre Brazil

Abstract

AbstractLate Pleistocene fossils from southern Brazil provide a unique opportunity to study the diet and habitat use of the extant franciscana dolphin (Pontoporia blainvillei) prior to human influence. Here, we subject 19 fossil and 21 contemporary specimens to stable carbon and oxygen isotope analysis (after first ruling out diagenesis via Fourier transform infrared spectroscopy). The two groups differ in their isotopic composition (PERMANOVA, p < .01), with fossils yielding more disparate δ13C values and recent samples more disparate δ18O values. Their isotopic niches show an overlap of ~20%, with that of the fossils being slightly wider (SEAc = 2.25‰2 versus 1.84‰2). We attribute these differences to impoverished modern fish communities and temporal changes in freshwater influx.

Funder

Society for Marine Mammalogy

Publisher

Wiley

Subject

Aquatic Science,Ecology, Evolution, Behavior and Systematics

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.13031

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