Temporal instability of lake charr phenotypes: Synchronicity of growth rates and morphology linked to environmental variables?
Autor: | Andrew M. Muir, Charles R. Bronte, Michael J. Hansen, Mara S. Zimmerman, Charles C. Krueger, Steve Voelker, Louise Chavarie |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
0301 basic medicine Evolution Biology 010603 evolutionary biology 01 natural sciences temporal changes Intraspecific competition 03 medical and health sciences otolith Genetics Dendrochronology medicine allometry QH359-425 developmental stability Ecology Evolution Behavior and Systematics Salvelinus Otolith Ecotype Ecology dendrochronology Original Articles biology.organism_classification Phenotype 030104 developmental biology medicine.anatomical_structure Salvelinus namaycush Sympatric speciation plasticity morphological modulation Original Article Allometry General Agricultural and Biological Sciences |
Zdroj: | Evolutionary Applications, Vol 14, Iss 4, Pp 1159-1177 (2021) Evolutionary Applications |
ISSN: | 1752-4571 1752-4563 |
Popis: | Pathways through which phenotypic variation among individuals arise can be complex. One assumption often made in relation to intraspecific diversity is that the stability or predictability of the environment will interact with expression of the underlying phenotypic variation. To address biological complexity below the species level, we investigated variability across years in morphology and annual growth increments between and within two sympatric lake charr Salvelinus namaycush ecotypes in Rush Lake, USA. A rapid phenotypic shift in body and head shape was found within a decade. The magnitude and direction of the observed phenotypic change were consistent in both ecotypes, which suggests similar pathways caused the variation over time. Over the same time period, annual growth increments declined for both lake charr ecotypes and corresponded with a consistent phenotypic shift of each ecotype. Despite ecotype‐specific annual growth changes in response to winter conditions, the observed annual growth shift for both ecotypes was linked, to some degree, with variation in the environment. Particularly, a declining trend in regional cloud cover was associated with an increase of early‐stage (ages 1–3) annual growth for lake charr of Rush Lake. Underlying mechanisms causing changes in growth rates and constrained morphological modulation are not fully understood. An improved knowledge of the biology hidden within the expression of phenotypic variation promises to clarify our understanding of temporal morphological diversity and instability. |
Databáze: | OpenAIRE |
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