大型底栖动物通过储存和再循环C、N、P等营养物质，在海洋生态系统的生物地球化学循环中发挥着重要作用。为了维持自身元素含量的动态平衡，底栖动物通过保持与其资源供应的平衡或改变其化学计量特征以应对环境变化。本文研究了 2020年5月和8月黄海北部褡裢岛近岸海域裙带菜藻场盛衰季节优势双壳类——江户明樱蛤、虾夷扇贝、小亮樱蛤和蛇尾类——浅水萨氏真蛇尾、日本倍棘蛇尾、紫蛇尾的生态化学计量特征。结果表明:6种大型底栖动物C、N、P含量变化范围分别为23。4％～49。8％、4。3％～14。7％、0。1％～1。1％，C∶N、C∶P、N∶P 的变化范围分别为 3。12～6。75、29。01～410。63、6。32～113。90，其中 P 含量相比C、N相对变化范围更大，导致C∶P和N∶P变化范围大。双壳类和蛇尾类的元素含量和元素比值差异显著。双壳类3种贝类的化学计量特征指标仅在N含量、C∶N和N∶P上具有显著差异，而3种蛇尾类种间除C含量外均具有显著差异，表明海洋大型底栖动物的生态化学计量特征具有种类间差异。同类群和物种的生态化学计量特征在月份间差异不显著。除C含量与P含量、C含量与C∶P、N含量与C∶P外，各大型底栖动物化学计量特征指标间均具有显著相关性。
Ecological stoichiometric characteristics of two dominant macrozoobenthos taxa in Dalian Island,northern Yellow Sea,China
Macrozoobenthos play a pivotal role in the biogeochemical cycling of C,N,and P in nearshore marine ecosystems by nutrient retention and recycling.To maintain the dynamic equilibrium in elemental contents,zoo-benthos must get a balance with their resource supply or alter their stoichiometric characteristics in response to envi-ronmental changes.We investigated the ecological stoichiometric characteristics of six macrozoobenthos species,including bivalve(Moerella jedoensis,Nitidotellina minuta,Mizuhopecten yessoensis)and ophiuroidea(Amphioplus japonicus,Ophiura sarsii vadicola,Ophiopholis mirabilis),which were collected from the coastal waters of Dalian Island in the northern Yellow Sea in May and August 2020.Results showed that the range of C,N,and P contents in the six species was 23.4％-49.8％,4.3％-14.7％,and 0.1％-1.1％,respectively.The range for C∶N,C∶P,and N∶P was 3.12-6.75,29.01-410.63,and 6.32-113.9,respectively.The P content exhibited a relatively larger range of variation than C and N,leading to higher variability in C∶P and N∶P.There were significant differences in element contents and ratios between the two groups,bivalve and ophiuroidea.The stoichiometric characteristics of the three shellfish species under bivalve was significantly different in N content,C∶N and N∶P,while the three ophiuroidea species had significant differences except for C content,indicating that the ecological stoichiometric characteristics of marine macrozoobenthos had interspecific differences.The ecological stoichiometric characteristics of the same group and species were not significantly different between the two months.There was a significant corre-lation between the stoichiometric characteristics of macrozoobenthos,except for C content and P content,C content and C∶P,N content and C∶P.
万方数据
维普
