caa a22 4500 445894539 CHVBK 20180317145627.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10750-010-0097-y doi (NATIONALLICENCE)springer-10.1007/s10750-010-0097-y Phylogeography of the copepod Acartia hudsonica in estuaries of the northeastern United States [Elektronische Daten] [Peter Milligan, Eli Stahl, Nikolaos Schizas, Jefferson Turner] Copepods of the genus Acartia dominate zooplankton assemblages in northwestern Atlantic estuaries, many of which originated after the last glacial maximum 10,000-18,000years ago. Acartia hudsonica occurs, at least seasonally, in estuaries from Chesapeake Bay to Labrador/Newfoundland. We sequenced the mitochondrial gene Cytochrome B (CytB) of 75 individuals of A. hudsonica from 26 estuaries from New Jersey to Maine, covering four biogeographic regions, and 11 individuals of Acartia tonsa from four of these estuaries in the southern part of the sampling range. A. hudsonica exhibited exceptionally high intraspecific DNA sequence variation. Uncorrected p-distances between sequences ranged from 0.3 to 31%. Five highly divergent sequence groups differed in frequencies across populations and biogeographic regions. One sequence group dominated northern localities, and two sequence groups were found at intermediate to high frequencies in two southern biogeographic regions. Ages of the sequence groups were estimated to be 11, 13, 30, and 37 million years, by applying a molecular clock calibrated by divergence in Alpheus snapping shrimps across the Isthmus of Panama. These ages were compared with independent biogeographic paleoceanographic data, and may have coincided with periods of global climate change over the past 40MY. Springer Science+Business Media B.V., 2010 Acartia hudsonica nationallicence Genomics nationallicence Phylogeography nationallicence Mitochondrial DNA nationallicence Milligan Peter School of Marine Science and Technology, University of Massachusetts Dartmouth, 02744, New Bedford, MA, USA aut Stahl Eli Biology Department, University of Massachusetts Dartmouth, 02747, North Dartmouth, MA, USA aut Schizas Nikolaos Department of Marine Sciences, University of Puerto Rico, 00681, Mayagüez, PR, USA aut Turner Jefferson School of Marine Science and Technology, University of Massachusetts Dartmouth, 02744, New Bedford, MA, USA aut Hydrobiologia Springer Netherlands 666/1(2011-05-01), 155-165 0018-8158 666:1<155 2011 666 10750 https://doi.org/10.1007/s10750-010-0097-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0097-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Milligan Peter School of Marine Science and Technology, University of Massachusetts Dartmouth, 02744, New Bedford, MA, USA aut NATIONALLICENCE 700 1- Stahl Eli Biology Department, University of Massachusetts Dartmouth, 02747, North Dartmouth, MA, USA aut NATIONALLICENCE 700 1- Schizas Nikolaos Department of Marine Sciences, University of Puerto Rico, 00681, Mayagüez, PR, USA aut NATIONALLICENCE 700 1- Turner Jefferson School of Marine Science and Technology, University of Massachusetts Dartmouth, 02744, New Bedford, MA, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 666/1(2011-05-01), 155-165 0018-8158 666:1<155 2011 666 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer