Populationgenetic structure of the intertidal kinorhynch Echinoderes marthae (Kinorhyncha;Cyclorhagida; Echinoderidae) across the São Sebastião Channel, Brazil    

TY - JOUR

T1 - Populationgenetic structure of the intertidal kinorhynch Echinoderes marthae (Kinorhyncha;Cyclorhagida; Echinoderidae) across the São Sebastião Channel, Brazil    

AU - Randsø, Phillip

AU - Di Domenico, Maikon

AU - Herranz, Maria

AU - Lorenzen, Eline

AU - Sørensen, Martin Vinther

PY - 2018

Y1 - 2018

N2 - Barriers to gene flow in marine environments vary between species and are highly dependent on dispersal ability and habitat discontinuity. Intertidal sand and mud flats are discontinuous areas, separated by other habitat types along a coastline or by subtidal zones. The São Sebastião Channel in eastern Brazil, which is situated between Rio de Janeiro and São Paulo, harbors two intertidal mud flats where populations of the kinorhynch Echinoderes marthae are found, one on the mainland (Araçá Bay) and one on São Sebastião Island (Ilhabela). Here, we investigated the genetic structure of two E. marthae populations across the São Sebastião Channel, in order to contribute to the ongoing debate on biogeography of meiobenthic animals. Based on 628 bp of the mitochondrial CO1 gene, we find that E. marthae shows low levels of structure in the São Sebastião Channel (FST = 0.165), and find evidence of recent demographic expansion across populations.

AB - Barriers to gene flow in marine environments vary between species and are highly dependent on dispersal ability and habitat discontinuity. Intertidal sand and mud flats are discontinuous areas, separated by other habitat types along a coastline or by subtidal zones. The São Sebastião Channel in eastern Brazil, which is situated between Rio de Janeiro and São Paulo, harbors two intertidal mud flats where populations of the kinorhynch Echinoderes marthae are found, one on the mainland (Araçá Bay) and one on São Sebastião Island (Ilhabela). Here, we investigated the genetic structure of two E. marthae populations across the São Sebastião Channel, in order to contribute to the ongoing debate on biogeography of meiobenthic animals. Based on 628 bp of the mitochondrial CO1 gene, we find that E. marthae shows low levels of structure in the São Sebastião Channel (FST = 0.165), and find evidence of recent demographic expansion across populations.

U2 - 10.2988/17-00005

DO - 10.2988/17-00005

M3 - Journal article

SN - 0006-324X

VL - 131

SP - 36

EP - 46

JO - Proceedings of the Biological Society of Washington

JF - Proceedings of the Biological Society of Washington

IS - 1

ER -