Stochastic variation in temperature and food availability impacts growth, but not metabolic rate and exploration in a juvenile amphibian

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00640477" target="_blank" >RIV/60077344:_____/25:00640477 - isvavai.cz</a>

Alternative codes found

RIV/68081766:_____/25:00640477 RIV/60076658:12310/25:43910548

Result on the web

<a href="https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2435.70193" target="_blank" >https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2435.70193</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/1365-2435.70193" target="_blank" >10.1111/1365-2435.70193</a>

Result language

angličtina

Original language name

Stochastic variation in temperature and food availability impacts growth, but not metabolic rate and exploration in a juvenile amphibian

Original language description

A substantial proportion of environmental variation is stochastic. While environmental stochasticity plays a key role in the evolution of phenotypic strategies, its short-term effects within generations remain poorly understood. These short-term organismal responses are especially relevant in the context of ongoing climate change, characterized by increasing unpredictability of weather conditions that are manifested directly through stochastic temperature fluctuations and can indirectly cause unpredictable food supply. We investigated how stochastic fluctuations in temperature and food supply affect the growth rate, resting metabolic rate (RMR) and exploratory behaviour in juvenile Alpine newts (Ichthyosaura alpestris). Additionally, we quantified among-individual variation in acute thermal reaction norms (10-20 degrees C) for RMR and exploration to assess their potential role in population-level responses to environmental stochasticity. Exposure to a stochastic food supply reduced growth rate, measured as increases in both body mass and total length. Stochastic temperature fluctuations decreased body mass growth but accelerated growth in total length. Both types of environmental stochasticity had negligible effects on population-mean thermal reaction norms for RMR and exploration. However, the intercepts (both traits) and slopes (exploration only) of these norms varied substantially among individuals. Stochastic food supply and temperature impacted growth depending on measured trait. The observed consistent among-individual variation in thermal reaction norms for RMR and exploration suggests a population-level capacity to cope with environmental unpredictability. Our results show that stochastic environmental variation influences ectotherm phenotypes even over short timescales. A mechanistic understanding of climate change impacts on ectotherm life histories, population dynamics and species interactions will require increased attention to this underexplored component of environmental variation.Read the free for this article on the Journal blog.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Functional Ecology

ISSN

0269-8463

e-ISSN

1365-2435

Volume of the periodical

39

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

3405-3416

UT code for WoS article

001592697800001

EID of the result in the Scopus database

2-s2.0-105019106329