Phenotypic plasticity and local adaptations to dissolved oxygen in larvae fire salamander (Salamandra infraimmaculata)

Ori Segev, Nadav Pezaro, Valentina Rovelli, Olga Rybak, Alan R. Templeton, Leon Blaustein

Research output: Contribution to journalArticlepeer-review

Abstract

A key environmental factor that varies both spatially and temporally in surface waters is dissolved oxygen (DO). In stagnant ephemeral freshwater ponds, DO can fluctuate diurnally and seasonally, while the constant mixing of water in streams typically maintain DO levels close to saturation with only minor fluctuations. Larvae of the Near Eastern fire salamander (Salamandra infraimmaculata) develop in a range of waterbodies that vary in flow and permanence. To study inter-population variation in larval response to environmental change, we translocated larvae between stream and pond habitats and exposed larvae sampled from different habitat types to hypoxic and normoxic conditions in the laboratory. Larvae transferred from stream to pond retain gill size, while larvae transferred from pond to stream show a reduction in gill size. Larvae that were caged within their native habitat, either stream or pond, display a decrease in gill size similar to larvae transferred from pond to stream. When exposed to experimentally manipulated levels of DO in the laboratory larvae, respectively, increase and decrease gill size under hypoxic and normoxic conditions. Habitat-type origin had a significant effect on the degree of change in gill size with larvae from permanent streams demonstrating the lowest absolute variation in gill size. There was no interaction between DO level (hypoxic/normoxic) and the larvae habitat-type origin. These results suggest that S. infraimmaculata larvae are locally adapted to their aquatic breeding habitat through the plastic ability to respond to the prevailing respiratory conditions by rapidly decreasing or increasing gill size.

Original languageEnglish
Pages (from-to)737-746
Number of pages10
JournalOecologia
Volume190
Issue number4
DOIs
StatePublished - 1 Aug 2019

Bibliographical note

Funding Information:
All applicable institutional and/or national guidelines for the care and use of animals were followed. Field collection of salamanders, husbandry, experimentation, and release were conducted according to the Israeli Nature and Parks Authority permits no. 2015/41087 and 2016/41511 and with accordance to the guidelines of the Animal Experimentation Ethics Committee at Haifa University, permit no. 363/15. This project was funded by the German?Israel Project-cooperation (DIP) awarded to Leon Blaustein and Alan R. Templeton (DFG reference number BL 1271/1-1), and Sebastian Steinfartz and Arne Nolte (STE 1130/8-1).

Funding Information:
lines for the care and use of animals were followed. Field collection of salamanders, husbandry, experimentation, and release were conducted according to the Israeli Nature and Parks Authority permits no. 2015/41087 and 2016/41511 and with accordance to the guidelines of the Animal Experimentation Ethics Committee at Haifa University, permit no. 363/15. This project was funded by the German–Israel Project-cooperation (DIP) awarded to Leon Blaustein and Alan R. Tem-pleton (DFG reference number BL 1271/1-1), and Sebastian Steinfartz and Arne Nolte (STE 1130/8-1).

Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

  • Gills
  • Habitat type
  • Hypoxia
  • Lentic
  • Lotic
  • Pond
  • Stream

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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