摘要
2012年7月,在荣成天鹅湖用自行研制的沉积物捕集器现场测定底内动物菲律宾蛤仔(Ruditapes philippinarum)和底上动物长牡蛎(Crassostrea gigas)的生物沉积速率,以建立潮间带贝类生物沉积的现场测定方法,并评价两种贝类对潮间带生态环境的影响。结果表明:各组内沉积物重量差异不显著,处理组与对照组的沉积物重量差异显著(F=58.047,P=0.000),测得的生物沉积速率与文献具有可比性,因此可以推测新型生物沉积物捕集器适用于浅水区(潮间带),能够准确测定生物沉积速率。在平均水温18.8°C条件下,菲律宾蛤仔和长牡蛎都具有较高的生物沉积速率。壳长(25.0±1.5)mm、软体干重(0.12±0.03)g的菲律宾蛤仔生物沉积速率为(44.92±4.12)mg/(ind·d);壳长(29.8±1.3)mm、软体干重(0.23±0.05)g的菲律宾蛤仔生物沉积速率为(54.84±7.77)mg/(ind·d);壳长(98.8±14.1)mm、软体干重(3.94±0.66)g的长牡蛎生物沉积速率为(1069.01±212.24)mg/(ind·d)。作为天鹅湖海区两种典型贝类,据估算,每平方米面积内的蛤仔和长牡蛎每天分别将29.9g、15.0g的悬浮颗粒物通过滤食和排粪沉积到底层,增强了水层-底栖系统的耦合作用。
In seagrass ecosystems, bivalve filter feeders may exert a strong impact on phytoplankton and other suspended particulate matter and enhance the deposition and the fluxes of C, N, and P to benthos. In July 2012, biodeposition rates by infaunal bivalve Ruditapes philippinarum and epifaunal bivalve Crassostrea gigas were in situ measured in the Swan Lake, Rongcheng, Shandong. We designed biodeposit traps and deployed them in the intertidal zone. The biodeposit traps performed well in recording the rates of biodeposition from infaunal bivalve and epifaunal bivalve in intertidal zone in 18.8℃ of the working day. Results show that the intragroup difference was not significant, and the weight of deposits in the experiment groups were significantly higher than that of the blank control(F=58.047, P=0.000). In terms of the size, biodeposition rate of R. philippinarum in shell length of 25.0±1.5mm(flesh dry weight 0.12±0.03g) was 44.92±4.12mg/(ind·d), and that of shell length 29.8±1.3mm(flesh dry weight 0.23±0.05g) was 54.84±7.77mg/(ind·d). For C. gigas, those in shell length 98.8±14.1mm and flesh dry weight 3.94±0.66g yielded 1069.01±212.24mg/(ind·d). The biodeposition rates are similar to those previously published. As two key species, R. philippinarum and C. gigas could remove 29.9 and 15.0g/m2 of seston in eelgrass bed, respectively, by intense filtering and defecation, which could enhance pelagic-benthic interaction in local area.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2014年第2期253-258,共6页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金项目
30972268号
41121064号
41176140号
国家科技支撑计划课题
2011BAD13B06号
海洋公益性行业科研专项重点项目
201005009号
200805069号
山东省中青年科学家科研奖励基金
2008BS06001号
青岛市市南区科技发展计划项目
2009517HY号
