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Genetic diversity of Nephtys hombergii (Phyllodocida, Polychaeta) associated with environmental factors in a highly fluctuating ecosystem

Published online by Cambridge University Press:  16 January 2017

Katerina Vasileiadou*
Affiliation:
Department of Biology, University of Patras, 26500, Patras, Greece Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, 71003, Crete, Greece
Christina Pavloudi
Affiliation:
Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, 71003, Crete, Greece Biology Department, University of Crete, Heraklion, 71409, Crete, Greece
Federica Camisa
Affiliation:
Department of Ecological and Biological Sciences-University of Viterbo Largo dell'università s.n.c., blocco C 01100, Viterbo, Italy
Irene Tsikopoulou
Affiliation:
Biology Department, University of Crete, Heraklion, 71409, Crete, Greece
Nina Fragopoulou
Affiliation:
Department of Biology, University of Patras, 26500, Patras, Greece
Georgios Kotoulas
Affiliation:
Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, 71003, Crete, Greece
Christos Arvanitidis
Affiliation:
Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, 71003, Crete, Greece
*
Correspondence should be addressed to: K. Vasileiadou, Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, 71003, Crete, Greece email: kvasileiadou@hcmr.gr

Abstract

Genetic diversity and population distribution are influenced by environmental factors, yet information is scarce on the interrelations that define dispersal of populations. Transitional water ecosystems are hosting habitats with temporally and spatially variable conditions, which make them very useful in understanding the mechanisms affecting population establishment. For the study, seasonal samples were collected from four lagoons in the lagoonal complex of Amvrakikos Gulf (W Greece). The mitochondrial DNA (COI gene) was analysed from polychaetes of Nephtys hombergii, as it is considered an important component of these assemblages and shows great dispersal ability. The results of the genetic analysis showed intraspecific variability in all the lagoons, with genetic structuring tending to follow a seasonal pattern rather than a spatial one. The results of BIOENV analysis indicated correlation of the observed pattern with the water pH levels, the redox potential and the concentration of phosphate in the sediment. The complexity of the network suggested the enhancement of the local population with more recently established haplotypes. The findings of the study support the necessity of designing management strategies by taking into account genetic diversity and population demography approaches in addition to those based on species and habitats.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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Genetic diversity of Nephtys hombergii (Phyllodocida, Polychaeta) associated with environmental factors in a highly fluctuating ecosystem
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Genetic diversity of Nephtys hombergii (Phyllodocida, Polychaeta) associated with environmental factors in a highly fluctuating ecosystem
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