Crassostrea ariakensis is an important aquacultured oyster species in Asia, its native region. During the past decade, consideration was given to
introducing C. ariakensis into Chesapeake Bay, in the United States, to help revive the declining native oyster industry and bolster the local ecosystem.
Little is known about the ecology and biology of this species in Asia due to confusion with nomenclature and difficulty in
accurately identifying the species of wild populations in their natural environment. Even less research has been done on the
population genetics of native populations of C. ariakensis in Asia. We examined the magnitude and pattern of genetic differentiation among 10 wild populations of C. ariakensis from its confirmed distribution range using eight polymorphic microsatellite markers. Results showed a small but significant
global θST (0.018), indicating genetic heterogeneity among populations. Eight genetically distinct populations were further distinguished
based on population pairwise θST comparisons, including one in Japan, four in China, and three populations along the coast of South Korea. A significant positive
association was detected between genetic and geographic distances among populations, suggesting a genetic pattern of isolation
by distance. This research represents a novel observation on wild genetic population structuring in a coastal bivalve species
along the coast of the northwest Pacific. 相似文献
Environment, Development and Sustainability - In the landmark Paris Agreement, the global economies agreed to put forward their best efforts in mitigation and adaptation of climate change. The... 相似文献
In this study, Chlorella vulgaris, Ganoderma lucidum, and endophytic bacteria were co-cultivated with the stimulation of strigolactone analogs GR24 to prepare pellets. During the purification of biogas slurry and biogas, multi-walled carbon nanotubes (MWCNTs) were introduced to enhance the removal efficiencies of nutrients and CO2. The results showed that both GR24 and MWCNTs affected the purification of biogas slurry and biogas. The maximum chemical oxygen demand, total nitrogen, total phosphorus, and CO2 removal efficiencies of the Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts were 82.57 ± 7.96% (P < 0.05), 82.14 ± 7.87% (P < 0.05), 84.27 ± 7.96% (P < 0.05), and 63.93 ± 6.22% (P < 0.05), respectively, with the induction of 10−9 M GR24 and 1 mg L−1 MWCNTs. Moreover, the growth and photosynthetic performance of the symbionts were consistent with the removal effects. The Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts obtained high growth rates and enzyme activity with the maximum growth rate of 0.365 ± 0.03 d−1, mean daily productivity of 0.182 ± 0.016 g L−1 d−1, and carbonic anhydrase activity of 31.07 ± 2.75 units, respectively. These results indicated that an appropriate concentration of GR24 and MWCNTs could promote the growth of symbionts, reinforce the purification effects of biogas slurry and biogas, and provide a new idea for the simultaneous purification of wastewater and biogas.