| 南麂列岛大沙岙沙滩贝类的时空分布 |
| |
| 引用本文： | 高爱根,曾江宁,徐晓群,寿鹿,廖一波,陈全震,胡锡钢,杨俊毅.南麂列岛大沙岙沙滩贝类的时空分布[J].海洋学研究,2008,26(2):13-19. |
| |
| 作者姓名： | 高爱根 曾江宁 徐晓群 寿鹿 廖一波 陈全震 胡锡钢 杨俊毅 |
| |
| 作者单位： | 国家海洋局,第二海洋研究所,国家海洋局,海洋生态系统与生物地球化学重点实验室,浙江,杭州,310012 |
| |
| 基金项目： | 浙江省自然科学基金
,
南麂海洋保护区资助项目 |
| |
| 摘 要： | 南麂列岛作为观光旅游的休闲去处正在日益升温,其中沙滩游玩是最大的活动亮点,大沙岙是南麂列岛最具代表性的沙滩,沙滩内生活着较多贝类,随大量人员的涌入和沿岸环境污染的日趋加重,大沙岙沙滩贝类的栖息地环境受到了较大程度的危害、人为活动正影响着贝类的生长发育。为探明近年来大沙岙贝类种类、数量及群落结构的变化,在南麂列岛国家海洋自然保护区建立初期(1992年)生态调查的基础上,于2003年再次对大沙岙贝类进行了采样分析,结果表明:大沙岙沙滩12种贝类的平均生物量和栖息密度分别为30.16g/m2和20个/m2,北断面开放区贝类的平均生物量和栖息密度(13.98g/m2和11个/m2)明显少于受监控的南断面核心区(46.33g/m2和30个/m2),贝类的平均生物量和栖息密度的垂直分布低潮区(48.43g/m2和31个/m2)高于中潮区(28.03g/m2和20个/m2),贝类的平均栖息密度7月高于3月,北断面贝类的季节变化、多样性和均匀度指数大于南断面。与建区初期同季调查资料比对发现,2003年北断面贝类数量下降幅度(14倍)显著大于南断面贝类下降幅度(1倍)。分析认为,自然环境变化和人为采捕是影响沙滩贝类数量下降的主要外部因子。
|
| 关 键 词： | 自然保护区 沙滩 贝类 南麂列岛 |
Temporal-spatial distribution of the shellfish in the Sand-Beach of Da-sha-ao, Nanji Archipelago |
| |
| GAO Ai-gen,ZENG Jiang-ning,XU Xiao-qun,SHOU Lu,LIAO Yi-bo,CHEN Quan-Zhen,HU Xi-Gang,YANG Jun-yi.Temporal-spatial distribution of the shellfish in the Sand-Beach of Da-sha-ao, Nanji Archipelago[J].Journal of Marine Sciences,2008,26(2):13-19. |
| |
| Authors: | GAO Ai-gen ZENG Jiang-ning XU Xiao-qun SHOU Lu LIAO Yi-bo CHEN Quan-Zhen HU Xi-Gang YANG Jun-yi |
| |
| Abstract: | With the increasing interests in the recreation tour to Nanji Archipelago,large amounts of tourists and pollutants have harmed the habitat environment and growth of the shellfish in the sand beach of Da-sha-ao,the most typical and popular sand beach of the archipelago.In order to find out the impact of human activities on the species,the amount and population structure of the shellfish in the archipelago,two-cruises investigation was carried out in May and July 2003.The results show:(1) The average biomass and density of 12 species of shellfish identified in this area were 30.16 g/m2 and 20 ind/m2;(2) The average biomass and density of the shellfish(13.98 g/m2 and 11 ind/m2) at the northern section of the tourist area was significant smaller than that of the monitored and controlled key area at the southern section(46.33 g/m2 and 30 ind/m2);(3) The vertical distribution of the average biomass and density in the low-tide area(48.43 g/m2 and 31 ind/m2) were higher than that in the mid-tide area(28.03 g/m2 and 20 ind/m2);(4) The average density in July was higher than in March;(5) The seasonal variation,diversity and evenness degree was greater at the northern section than that at the southern section.Comparisons with the data obtained in the ecological investigation made when the National Natural Reserve of Nanji Archipelago was set up in 1992 shows that the decrease of the shellfish quantity at the northern section(14 times) was significantly greater than that at the southern section(1 time).Analysis shows that human activity was the major exterior factor leading to the decline of shellfish in the sand beach.Protection measurements are suggested as follows:(1) To help generate awareness of the shellfish protection among the general public,and make regulations on shellfish-seizing forbiddance during breeding season as soon as possible;(2) Eutrophic marine environment of Nanji archipelago leads to frequent occurrence of red tide,on which great importance should be attached by relevant government agencies;(3) Experimental ecology and physiology study of the main economic should be carried out;(4) Regular investigations should be done in certain regions of the natural reserve to trace and monitor the dynamic change process of the shellfish stocks. |
| |
| Keywords: | natural reserve sand beach shellish Nanji Archipelage |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
