From tides to nucleotides: Genomic signatures of adaptation to environmental heterogeneity in barnacles
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
From tides to nucleotides : Genomic signatures of adaptation to environmental heterogeneity in barnacles. / Nunez, Joaquin C. B.; Rong, Stephen; Ferranti, David A.; Damian-Serrano, Alejandro; Neil, Kimberly B.; Glenner, Henrik; Elyanow, Rebecca G.; Brown, Bianca R. P.; Alm Rosenblad, Magnus; Blomberg, Anders; Johannesson, Kerstin; Rand, David M.
In: Molecular Ecology, Vol. 30, No. 23, 2021, p. 6417-6433.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - From tides to nucleotides
T2 - Genomic signatures of adaptation to environmental heterogeneity in barnacles
AU - Nunez, Joaquin C. B.
AU - Rong, Stephen
AU - Ferranti, David A.
AU - Damian-Serrano, Alejandro
AU - Neil, Kimberly B.
AU - Glenner, Henrik
AU - Elyanow, Rebecca G.
AU - Brown, Bianca R. P.
AU - Alm Rosenblad, Magnus
AU - Blomberg, Anders
AU - Johannesson, Kerstin
AU - Rand, David M.
N1 - Publisher Copyright: © 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd
PY - 2021
Y1 - 2021
N2 - The northern acorn barnacle (Semibalanus balanoides) is a robust system to study the genetic basis of adaptations to highly heterogeneous environments. Adult barnacles may be exposed to highly dissimilar levels of thermal stress depending on where they settle in the intertidal (i.e., closer to the upper or lower tidal boundary). For instance, barnacles near the upper tidal limit experience episodic summer temperatures above recorded heat coma levels. This differential stress at the microhabitat level is also dependent on the aspect of sun exposure. In the present study, we used pool-seq approaches to conduct a genome wide screen for loci responding to intertidal zonation across the North Atlantic basin (Maine, Rhode Island, and Norway). Our analysis discovered 382 genomic regions containing SNPs which are consistently zonated (i.e., SNPs whose frequencies vary depending on their position in the rocky intertidal) across all surveyed habitats. Notably, most zonated SNPs are young and private to the North Atlantic. These regions show high levels of genetic differentiation across ecologically extreme microhabitats concomitant with elevated levels of genetic variation and Tajima's D, suggesting the action of non-neutral processes. Overall, these findings support the hypothesis that spatially heterogeneous selection is a general and repeatable feature for this species, and that natural selection can maintain functional genetic variation in heterogeneous environments.
AB - The northern acorn barnacle (Semibalanus balanoides) is a robust system to study the genetic basis of adaptations to highly heterogeneous environments. Adult barnacles may be exposed to highly dissimilar levels of thermal stress depending on where they settle in the intertidal (i.e., closer to the upper or lower tidal boundary). For instance, barnacles near the upper tidal limit experience episodic summer temperatures above recorded heat coma levels. This differential stress at the microhabitat level is also dependent on the aspect of sun exposure. In the present study, we used pool-seq approaches to conduct a genome wide screen for loci responding to intertidal zonation across the North Atlantic basin (Maine, Rhode Island, and Norway). Our analysis discovered 382 genomic regions containing SNPs which are consistently zonated (i.e., SNPs whose frequencies vary depending on their position in the rocky intertidal) across all surveyed habitats. Notably, most zonated SNPs are young and private to the North Atlantic. These regions show high levels of genetic differentiation across ecologically extreme microhabitats concomitant with elevated levels of genetic variation and Tajima's D, suggesting the action of non-neutral processes. Overall, these findings support the hypothesis that spatially heterogeneous selection is a general and repeatable feature for this species, and that natural selection can maintain functional genetic variation in heterogeneous environments.
KW - balancing selection
KW - barnacles
KW - ecological genomics
KW - ecological load
KW - intertidal
KW - Semibalanus balanoides
KW - zonation
U2 - 10.1111/mec.15949
DO - 10.1111/mec.15949
M3 - Journal article
C2 - 33960035
AN - SCOPUS:85106207487
VL - 30
SP - 6417
EP - 6433
JO - Molecular Ecology
JF - Molecular Ecology
SN - 0962-1083
IS - 23
ER -
ID: 276160464