| 广东省水库枝角类组成特征的初步研究 |
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| 引用本文： | 陈绵润,赵帅营,林秋奇,韩博平.广东省水库枝角类组成特征的初步研究[J].湖泊科学,2007,19(1):77-86. |
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| 作者姓名： | 陈绵润 赵帅营 林秋奇 韩博平 |
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| 作者单位： | 暨南大学水生生物研究所,广州,510632 |
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| 基金项目： | 高等学校博士学科点专项科研项目
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优秀回国人员基金 |
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| 摘 要： | 于2000年丰水期和枯水期调查了广东省19座典型大中型水库枝角类,随后对其中3座代表性水库进行了4年的枝角类种类定性调查.在鉴定出的枝角类16属24种中有13个广温种、7个嗜暖种、3个嗜寒种和1个特有种;每个水库的平均种类数5-6种.从个体大小来看,水库枝角类以小个体种类为主,有14种的体长小、于1 mm,它们分布广且数量多,其中优势种主要为长额象鼻溞、秀体溞、微型裸腹溞、颈沟基合溞和角突网纹溞等.透明溞和透明薄皮溞是主要的大个体种类,出现在4座贫、中营养水库的水样中.水库枝角类的丰度较低,在丰水期,平均丰度小于10 ind./L和10-20 ind./L的水库分别为14座和5座,在枯水期,为12座和5座,而高州水库和河溪水库中的平均丰度达67ind./L.主要优势种在不同营养类型水库中分布差别不大.枝角类的丰度受水力滞留时间影响,直流型水库的枝角类种群丰度的分布明显受到水流速度的影响,湖泊区枝角类个体及其食物均随水库放水输出而减少.由于采样点主要位于大坝附近,枝角类以敞水区的种类为主.从种类组成和数量来看,广东省水库枝角类具有明显的热带特点,枝角类的生物量小,以个体较小的种类优势种,大型种类的个体数量极低且身体透明.
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| 关 键 词： | 枝角类 热带亚热带 水库 分布 广东 高州水库 枝角类 种类组成 特征 研究 Guangdong Province distribution Cladoceran 个体数 生物量 热带 敞水区 大坝 采样点 输出 食物 湖泊 时间影响 水流速度 |
| 收稿时间： | 2006-01-17 |
| 修稿时间： | 2006-06-17 |
Cladoceran distribution in reservoirs of Guangdong Province, South China |
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| CHEN Mianrun,ZHAO Shuaiying,LIN Qiuqi and HAN Boping.Cladoceran distribution in reservoirs of Guangdong Province, South China[J].Journal of Lake Science,2007,19(1):77-86. |
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| Authors: | CHEN Mianrun ZHAO Shuaiying LIN Qiuqi and HAN Boping |
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| Institution: | Institute of Hydrobiology, Jinan University, Guangzhou 510632, P. R. China |
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| Abstract: | Cladocerans in 19 reservoirs of Guangdong Province,South China were investigated in 2000.Among them,3 typical with different retention time were sampled in the later 4 years.As a result,24 species in 16 genera were identified,including 13 eurythermal species,7 thermophilic species,3 psychrophilic species and 1 endemic species.There are 5 or 6 species on average in an individual reservoir.The majority of the species were composed of small-bodied species that were abundant and dominant over large-bodied species.These small sized species had a body length less than 1 mm.Small-bodied species such as Bosmina longirostris,Bominopsis deitersi,Diaphanoso- ma brachyurum,Diaphanosom birger,Ceriodaphnia cornuta and Moina micura were the dominant species.They occurred in all reservoirs less regarding of reservoir trophic states.Among large-bodied species,only Daphnia hya- line and Leptodora kindti can be found frequently in several oligotrophic or mesotrophic reservoirs.The average a- bundance of cladocerans was very low.In flood season,the average abundance was less than 10 ind./L in 14 in- vestigated reservoirs,and ranged from 10 to 20 ind./L in 5 reservoirs.In dry season,the average abundance was less than 10 ind./L in 12 reservoirs,between 10 ind./L and 20 ind./L in 5 reservoirs,but reach 67 ind./L in 2 reservoirs:Gaozhou Reservior and Hexi Reservoir.Because of the difference in food quality and quantity of zoo- plankton,the species composition and population abundance of cladocerans in reservoirs at different trophic states are different to some extent,however,the dominant species were almost the same in these reservoirs.The cladocer- an' s abundances were related to water retention time in the investigated.The abundance of cladocerans and their food concentration were significantly affected by flushing in the flow-through reservoirs.As most sampling sites are located near dams,the species are mainly contributed by the pelagic group and the composition of species has a typical structure of tropical zooplankton.Cladocerans are dominated by small-sized species;the large sized species have a transparent body that is helpful to survive in high predation in tropical/subtropical reservoirs. |
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| Keywords: | cladoceran tropical and subtropical reservoir distribution |
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