Metazoan zooplankton was sampled in the Henggang Reservoir, a hypertrophic reservoir in Guangdong Providence in May and November of 2005. The results showed that the zooplankton was characterized by a few species with low abundance. 4 species of cladocera, 4 species of adult copepod and 17 species of rotifer were observed. The total species number in May and November was 15 and 20, respectively. Rotifer was the most common group. The mean relative abundances of rotifer in May and November were 82.8% and 78.8% respectively. The dominant species were Asplanchna priodonta, Brachionus calyciflorus and Brachionus diversicornis. Copepod was a less common group; its mean relative abundances in May and November were 16.6% and 19.9%, respectively. Copepod was composed mainly by nauplⅡ and copepodid. Phyllodiaptomus tunguidus was the common species in adult copepod. Cladocera was the least common group; its mean relative abundances in May and November were only 0.6% and 1.3% respectively. Moina marocopa was the common species in this group. The composition, abundance and biomass of zooplankton had tempo-spatial heterogeneity in the reservoir. The mean abundance was 242.6 ind·L-1 in May and 138.5 ind·L-1 in November. The mean biomass was 0.912mg·L-1 in May and 0.317 mg·L-1 in November. The abundance and biomass of zooplankton tend to decrease from riverine to lacustrine, corresponding to the morphology and hydrodynamics of Henggang Reservoir. Compared with other waters, the high abundance of Asplanchna priodonta in Henggang Reservoir lead to higher biomass of zooplankton than other tropical eutrophic lakes, such as Xinghu Lake, which had similar zooplankton abundance. However, both abundance and biomass of zooplankton in Henggang Reservoir were far lower than those temperate eutrophic reservoirs.
[1] Lewis,W M Jr.1987.Tropical limnology[J].Annual Review of Ecology and Systematics,18:159-184.
[2] Fernando C H.1980.The species and size composition of tropical freshwater zooplankton with special reference to the oriental region (South East Asia)[J].Internationale Revue der gesamten Hydrobiologie und Hydrographie,65 (3):411-426.
[3] Dussart B H,Fernando C H,Matsumura-Tundisi T.et al.1984.A review of systematics,distribution and ecology of tropical freshwater zooplankton[J].Hydrobiologia,113 (1):77-91.
[4] Dumont H J.1994.On the diversity of the Cladocera in the tropics[J].Hydrobiologia,272:27-38.
[5] Lin Q Q,Duan S S,Hu R et al.2003.Zooplankton Distribution in Tropical Reservoirs,South China[J].International Review of Hydrobiology.88 (6):602-613.
[7] Carpenter S R,Kitchell J F,Hodgson J R.1985.Cascading trophic interactions and lake productivity:fish predation and herbivory can regulate lake ecosystems[J].BioScience,35:634-639.
[8] Mehner T,Benndorf J & Kasprzak P et al.2002.Biomanipulation of lake ecosystems:successful applications and expanding complexity in the underlying science[J].Freshwater Biology,47:2453-2465.
[9] Seda J,Kubecka J.1997.Long-term biomanipulation of Rimov Reservoir (Czech Republic)[J].Hydrobiologia,345:95-108.
[10] Jeppesen E,SΦndergaard M,Mazzeo N,et al.2005.Lake restoration and biomanipulation in temperate lakes-relevance for subtropical and tropical lakes[M].In:Restoration and management of tropical eutrophic lakes,Vikram Reddy (Ed.),Science Publishers Inc.,Enfield,NH,USA.
[11] Branco C W C,Rocha M A,Pinto G F S,et al.2002.Limnological features of Funil Reservoir (R.J.,Brazil) and indicator properties of rotifers and cladocerans of the zooplankton community[J].Lakes & Reservoirs:Research and Management,7:87-92.
[12] Pejler B.1983.Zooplanktic indicators of trophy and their food[J].Hydrobiologia,101:111-114.
[13] Saunders J F,Lewis W M.1988.Dynamics and control mechanisms in a tropical zooplankton community (Lake Valencia,Venezuela)[J].Ecological Monographs,58(4):337-353.
[16] Seda J,Devetter M.2000.Zooplankton community structure along a trophic gradient in a canyon-shaped dam reservoir[J].Journal of Plankton Research,22:1829-1840.
[17] Chang K H,Hanazato T.2003.Vulnerability of cladoceran species to predation by the copepod Mesocyclops leuckarti:laboratory observations on the behavioural interactions between predator and prey[J].Freshwater Biology,48:476-484.
[18] Hopp U,Maier G,Bleher R.1997.Reproduction and adult longevity of five species of planktonic cyclopoid copepods reared on different diets:a comparative study[J].Freshwater Biology,38:289-300.
[19] Baribwegure D,Mirabdullayev I M.2003.Thermocyclops dumonti sp.n.(Crustacea,Copepoda),from a Temporary Waterbody in China[J].Internat.Rev,Hydrobiol,88:201-211.
[20] Duggan I C,Green J D,Shiel R J.2001.Distribution of rotifers in North Island,New Zealand,and their potential use as bioindicators of lake trophic state[J].Hydrobiologia,446/447:155-164.
[22] Bini L M,Tundisi J G,Matsumura Tundisi T et al.1997.Spatial variation of zooplankton groups in a tropical reservoir (Broa Reservoir,São Paulo State Brazil)[J].Hydrobiologia,357:89-98.