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Structure-Function Relationships of Oxygen Transport Proteins in Marine Invertebrates Enduring Higher Temperatures and Deoxygenation

Authors :
Christopher J. Coates
Flávia A. Belato
Kenneth M. Halanych
Elisa M. Costa-Paiva
Source :
The Biological Bulletin. 243:134-148
Publication Year :
2022
Publisher :
University of Chicago Press, 2022.

Abstract

Predictions for climate change-to lesser and greater extents-reveal a common scenario in which marine waters are characterized by a deadly trio of stressors: higher temperatures, lower oxygen levels, and acidification. Ectothermic taxa that inhabit coastal waters, such as shellfish, are vulnerable to rapid and prolonged environmental disturbances, such as heatwaves, pollution-induced eutrophication, and dysoxia. Oxygen transport capacity of the hemolymph (blood equivalent) is considered the proximal driver of thermotolerance and respiration in many invertebrates. Moreover, maintaining homeostasis under environmental duress is inextricably linked to the activities of the hemolymph-based oxygen transport or binding proteins. Several protein groups fulfill this role in marine invertebrates: copper-based extracellular hemocyanins, iron-based intracellular hemoglobins and hemerythrins, and giant extracellular hemoglobins. In this brief text, we revisit the distribution and multifunctional properties of oxygen transport proteins, notably hemocyanins, in the context of climate change, and the consequent physiological reprogramming of marine invertebrates.

Details

ISSN :
19398697 and 00063185
Volume :
243
Database :
OpenAIRE
Journal :
The Biological Bulletin
Accession number :
edsair.doi.dedup.....74cc1cd5d184fe2595516ea5dabdaf0b