Article (Scientific journals)
Periodic Environmental Disturbance Drives Repeated Ecomorphological Diversification in an Adaptive Radiation of Antarctic Fishes.
Parker, Elyse; Zapfe, Katerina L; Yadav, Jagriti et al.
2022In American Naturalist, 200 (6), p. 221 - E236
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Keywords :
climate change; morphospace disparity; notothenioid; phylogenomics; Animals; Antarctic Regions; Phylogeny; Phenotype; Fishes/genetics; Ecosystem; Ecology, Evolution, Behavior and Systematics; macroevolution; icefishes
Abstract :
[en] The ecological theory of adaptive radiation has profoundly shaped our conceptualization of the rules that govern diversification. However, while many radiations follow classic early-burst patterns of diversification as they fill ecological space, the longer-term fates of these radiations depend on many factors, such as climatic stability. In systems with periodic disturbances, species-rich clades can contain nested adaptive radiations of subclades with their own distinct diversification histories, and how adaptive radiation theory applies in these cases is less clear. Here, we investigated patterns of ecological and phenotypic diversification within two iterative adaptive radiations of cryonotothenioid fishes in Antarctica's Southern Ocean: crocodile icefishes and notoperches. For both clades, we observe evidence of repeated diversification into disparate regions of trait space between closely related taxa and into overlapping regions of trait space between distantly related taxa. We additionally find little evidence that patterns of ecological divergence are correlated with evolution of morphological disparity, suggesting that these axes of divergence may not be tightly linked. Finally, we reveal evidence of repeated convergence in sympatry that suggests niche complementarity. These findings reflect the dynamic history of Antarctic marine habitats and may guide hypotheses of diversification dynamics in environments characterized by periodic disturbance.
Disciplines :
Zoology
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Parker, Elyse
Zapfe, Katerina L
Yadav, Jagriti
Frederich, Bruno  ;  Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Jones, Christopher D
Economo, Evan P
Federman, Sarah
Near, Thomas J
Dornburg, Alex
Language :
English
Title :
Periodic Environmental Disturbance Drives Repeated Ecomorphological Diversification in an Adaptive Radiation of Antarctic Fishes.
Publication date :
December 2022
Journal title :
American Naturalist
ISSN :
0003-0147
eISSN :
1537-5323
Publisher :
University of Chicago Press, United States
Volume :
200
Issue :
6
Pages :
E221 - E236
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Refugia and ecosystem tolerance in the Southern Ocean
Funders :
BELSPO - Belgian Science Policy Office
Funding number :
BR/154/A1/RECTO
Available on ORBi :
since 25 November 2022

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