摘要
对海南岛新村湾海草床的优势种——海菖蒲(Enhalus acoroides)的茎枝特征、茎枝密度、生物量和不同组织营养素含量进行了研究,并探讨了海水和沉积物间隙水营养负荷对其的影响。结果表明,(1)海菖蒲的茎枝特征(叶长、宽和枝重)、茎枝密度和地上生物量存在显著的空间差异,这些因子与海水和沉积物间隙水DIN含量呈负相关;(2)海菖蒲TN、TP质量分数随着样区的变化而产生显著差异,海菖蒲TN质量分数与其所在样区海水和沉积物间隙水DIN浓度呈显著正相关;(3)随着水体N负荷的增加,海菖蒲叶单位面积附着藻类生物量显著增加。本次研究的结果表明,网箱养殖引起的营养负荷是导致海草衰亡的潜在原因之一,引起了新村湾网箱养殖区海草床的退化。
In this paper, the shoot features, shoot density, biomass and nutrient contents in different tissues of dominant species Enhalus acoroides in the seagrass meadow in the Xincun Bay, Hainan Island are studied, and the effects of nutrient loading of seawater and sediment pore water on Enhalus acoroides are discussed. It is shown from the study results that there are significantly spatial different in three factors including shoot features（leaf length, leaf width and shoot weight）, shoot density and above-ground biomass of Enhalus acoroides, and the three factors are negatively correlated with the dissolved inorganic nitrogen （DIN） contents of seawater and sediment pore water; there are significant difference between the total nitrogen（TN） and total phosphorus（TP） contents of Enhalus acoroides at 3 sampling sites, and the TN contents of Enhalus acoroides are positively correlated with the DIN concentrations of seawater and sediment pore water at their respective sites; and the epiphyte biomass on unit area of Enhalus acoroides leaf increased significantly with increasing nitrogen nutrient loading in the water column. It is shown from the study resluts that the cage culture-derived nutrient loading is a potential cause for the seagrass decline and causes the degeneration of seagrass meadow in the cage culture area of the Xincun Bay.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2007年第2期200-207,共8页
Advances in Marine Science
基金
联合国环境规划署/全球环境基金(UNEP/GEF)项目(UNEP/GEF/SCS/Chi/MoU2c)扭转南中国海和泰国湾环境退化趋势项目--中国海草专题:中国科学院知识创新工程项目--热带亚热带海湾特殊类型生态系统动力过程及其可持续发展机制(KSCZ2-SW-132)
关键词
海菖蒲
营养盐负荷
网箱养殖
海南岛
Enhalusacoroides
nutrient loading
cage culture
Hainan Island
作者简介
黄道建（1980-），男，广东阳江市人，硕士，主要从事海洋环境科学研究。
通讯作者：黄小平，研究员，博士生导师，主要从事海洋环境研究。E-mail：xphuang@scsio．ac.cn
