桑沟湾不同区域养殖栉孔扇贝的固碳速率

Carbon sequestration rate of the scallop Chlamys farreri cultivated in different areas of Sanggou Bay

中文关键词: 生物固碳  栉孔扇贝  桑沟湾  海水养殖

英文关键词: Carbon biosequestration  Scallop Chlamys farreri  Sanggou Bay  Mariculture

中文摘要:

      测定桑沟湾深水区、浅水区栉孔扇贝固碳量，并进行固碳速率的标准化处理，增加了与陆地生态系统固碳率的可比性，分析了栉孔扇贝在不同养殖区的固碳速率及其主要控制因素。研究显示，对于同一养殖种类，深水区生物固碳的速率比浅水区高两倍。不同区域，贝类壳碳及软体部中碳的含量没有显著性差异，导致区域性差异的主要原因是由于生长速度、养殖密度及存活率的不同而导致单位面积的产量存在差异。养殖栉孔扇贝的固碳速率可与森林相媲美。另外, 贝类的养殖活动与浅海生态系统的碳循环之间关系复杂，需要加强贝类的摄食、呼吸、生物沉积、钙化等整个生理生态学过程研究。

英文摘要:

      The annual yield of shellfish aquaculture in China is reaching nearly 10 million tonnes. Carbon sequestration rate of the maricultured scallop Chlamys farreri in different areas of Sanggou Bay was measured in this study, and the main controlling factors in different areas were analyzed and discussed. Also, the comparability with terrestrial ecosystems was increased by standardizing carbon unit. No significant difference was found for scallop shell and soft tissue carbon content in different areas. However, differences in growth rate, stocking density and survival rate in different areas caused the differences in yield, which consequently resulted in different biological carbon sequestration rates in different areas. Carbon sequestration rate of cultured scallop C.farreri was comparable with the forest. In addition, shellfish farming activities had complicated the relationship with ecosystem carbon cycling in shallow water.Physiological processes such as feeding, breathing, bio-deposit and calcification need to be further studied in the future.