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CC BY V4.0, Open Access
Journal article
Heat tolerance and thermal preference of the copepod Tigriopus californicus are insensitive to ecologically relevant dissolved oxygen levels
Scientific reports, Vol.10(1), pp.18885-18885
11/03/2020
Handle:
https://hdl.handle.net/2376/117933
PMID: 33144656
Abstract
Shifting climate patterns may impose novel combinations of abiotic conditions on animals, yet understanding of the present-day interactive effects of multiple stressors remains under-developed. We tested the oxygen and capacity limited thermal tolerance (OCLTT) hypothesis and quantified environmental preference of the copepod Tigriopus californicus, which inhabits rocky-shore splashpools where diel fluctuations of temperature and dissolved oxygen (DO) are substantial. Egg-mass bearing females were exposed to a 5 h heat ramp to peak temperatures of 34.1-38.0 °C crossed with each of four oxygen levels: 22, 30, 100 and 250% saturation (4.7-5.3, 5.3-6.4, 21.2-21.3, and 50.7-53.3 kPa). Survival decreased at higher temperatures but was independent of DO. The behavioral preference of females was quantified in seven combinations of gradients of both temperature (11-37 °C) and oxygen saturation (17-206% or 3.6-43.6 kPa). Females avoided high temperatures regardless of DO levels. This pattern was more pronounced when low DO coincided with high temperature. In uniform temperature treatments, the distribution shifted toward high DO levels, especially in uniform high temperature, confirming that Tigriopus can sense environmental pO
. These results question the ecological relevance of OCLTT for Tigriopus and raise the possibility of microhabitat selection being used within splashpool environments to avoid physiologically stressful combinations of conditions.
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Details
- Title
- Heat tolerance and thermal preference of the copepod Tigriopus californicus are insensitive to ecologically relevant dissolved oxygen levels
- Creators
- Khuong V Dinh - School of Biological Sciences, Washington State University, P.O. Box 644236, Pullman, WA, 99164-4236, USA. khuong.dinh@wsu.eduArani Y Cuevas-Sanchez - School of Biological Sciences, Washington State University, P.O. Box 644236, Pullman, WA, 99164-4236, USAKatherine S Buhl - School of Biological Sciences, Washington State University, P.O. Box 644236, Pullman, WA, 99164-4236, USAElizabeth A Moeser - Department of Environmental Studies, University of Southern California, Los Angeles, CA, USAW Wesley Dowd - Washington State University, Biological Sciences, School of
- Publication Details
- Scientific reports, Vol.10(1), pp.18885-18885
- Academic Unit
- Biological Sciences, School of
- Identifiers
- 99900583163101842
- Copyright
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creat iveco mmons .org/licen ses/by/4.0/.
- Language
- English
- Resource Type
- Journal article