TY - JOUR

T1 - Sensitivity to stress in the bivalve Macoma balthica from the most northern (Arctic) to the most southern (French) populations

T2 - Low sensitivity in Arctic populations because of genetic adaptations?

AU - Hummel, Herman

AU - Bogaards, Roelof

AU - Bek, Tatiana

AU - Polishchuk, Lennard

AU - Amiard-Triquet, Claude

AU - Bachelet, Guy

AU - Desprez, Michel

AU - Strelkov, Peter

AU - Sukhotin, Alex

AU - Naumov, Andrei

AU - Dahle, Salve

AU - Denisenko, Stanislav

AU - Gantsevich, Michael

AU - Sokolov, Kirill

AU - De Wolf, Lein

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The stress sensitivity, determined in copper exposure experiments and in survival in air tests, and the genetic structure, measured by means of isoenzyme electrophoresis, were assessed in populations of the Baltic clam Macoma balthica (L.) from its southern to its northern distribution limit, in order to test the hypotheses that near the distribution limit the clams would be more stress sensitive and would have a lower genetic variability. The populations in west and north Europe show a strong genetic resemblance. The populations in the sub-Arctic White Sea are genetically slightly different, and show a low stress sensitivity. The populations in the Arctic Pechora Sea are genetically very distant from the other populations, and show the lowest stress sensitivity. Near the southern distribution limit, in agreement with the hypotheses, genetic variability is low and stress sensitivity high. On the other hand, in contrast to expectation, near the northern distribution limit, in the populations of the Pechora Sea, the genetic variability was higher, thus not reduced, and the stress sensitivity was low compared to all other populations. Yet, it remains a question if such is due to gradual physiological acclimatization (and ongoing differential selection) or to genetic adaptation.

AB - The stress sensitivity, determined in copper exposure experiments and in survival in air tests, and the genetic structure, measured by means of isoenzyme electrophoresis, were assessed in populations of the Baltic clam Macoma balthica (L.) from its southern to its northern distribution limit, in order to test the hypotheses that near the distribution limit the clams would be more stress sensitive and would have a lower genetic variability. The populations in west and north Europe show a strong genetic resemblance. The populations in the sub-Arctic White Sea are genetically slightly different, and show a low stress sensitivity. The populations in the Arctic Pechora Sea are genetically very distant from the other populations, and show the lowest stress sensitivity. Near the southern distribution limit, in agreement with the hypotheses, genetic variability is low and stress sensitivity high. On the other hand, in contrast to expectation, near the northern distribution limit, in the populations of the Pechora Sea, the genetic variability was higher, thus not reduced, and the stress sensitivity was low compared to all other populations. Yet, it remains a question if such is due to gradual physiological acclimatization (and ongoing differential selection) or to genetic adaptation.

KW - Adaptation

KW - Arctic

KW - Copper

KW - Distribution limit

KW - Genetics

KW - Geographic cline

KW - Macoma balthica

KW - Stress sensitivity

KW - Survival in air

UR - http://www.scopus.com/inward/record.url?scp=85088241689&partnerID=8YFLogxK

U2 - 10.1007/978-94-017-1907-0_13

DO - 10.1007/978-94-017-1907-0_13

M3 - Article

VL - 355

SP - 127

EP - 138

JO - Hydrobiologia

JF - Hydrobiologia

SN - 0018-8158

IS - 1-3

ER -