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Ecklonia cava Kjellman is a common kelp found in shallow subtidal in warm-temperate waters in the northwest Pacific Ocean. This species has shown substantial morphological variation along with subsistence in different locations and local environments. We quantified the magnitude of morphological variation of E. cava from six populations along ~700 km of coastline from Jeju Island to Dokdo in Korea. In addition, we examined genetic distance among the populations using random amplified polymorphic DNA (RAPD) analysis. Most morphological characteristics investigated were significantly different among locations. Multivariate analyses indicated two phenetically distinct groups (nearshore, sheltered vs. offshore, exposed), indicating wave exposure with turbidity are presumably major factors for the separation. With RAPD data, results of Nei's diversity (H) and AMOVA showed considerable variations in within- and between-populations. Pairwise ${\Phi}_{ST}$ and $N_m$ values indicated moderate gene flow between the six locations. Results of Nei's analysis revealed three genetically distinct groups, not consistent with the morphological groupings, indicating that a time gap may exist between morphological and genetic variations. This study also suggests dispersal distance of this kelp may be longer than what is commonly thought and genetic similarity in the populations was largely reflected by the direction of ocean current rather than just geographical distance.
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참고문헌 (60)
참고문헌 신청
Bouza, N / 2006 / Genetic structure of natural populations in the red algae Gelidium canariense (Gelidiales, Rhodophyta) investigated by random amplified polymorphic DNA (RAPD) markers / J. Phycol 42:304~311
Camus, P. A / 1992 / Scale-dependent variability of density estimates and morphometric relationships in subtidal stands of the kelp Lessonia trabeculata in northern and central Chile / Mar. Ecol. Prog. Ser 90:193~200
Chang, K. -I / 2000 / Observations of the Cheju Current / J. Korean Soc. Oceanogr 35:129~152
Chung, H / 1998 / Ecological characteristics of algal whitening in coastal zone of Seogwipo area, Cheju Island / Algae 13:361~374
Clarke, K. R / 2001 / Primer v6: user manual/ tutorial / PRIMER-E, Plymouth
Camus, P. A / 1992 / Scale-dependent variability of density estimates and morphometric relationships in subtidal stands of the kelp Lessonia trabeculata in northern and central Chile / Mar. Ecol. Prog. Ser 90:193~200
Chang, K. -I / 2000 / Observations of the Cheju Current / J. Korean Soc. Oceanogr 35:129~152
Chung, H / 1998 / Ecological characteristics of algal whitening in coastal zone of Seogwipo area, Cheju Island / Algae 13:361~374
Clarke, K. R / 2001 / Primer v6: user manual/ tutorial / PRIMER-E, Plymouth
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