Macrozoobenthos community plays an important role in material cycle and energy flow in riverine ecosystem.During the period of June,2003 to June 2004,an investigation on the life cycle and production of the dominant species of macrozoobenthos community in a second-grade river of Hanjiang River catchment was carried out.From the upper reach to the lower reach of Heizhuchong stream,we chose six types of habitats to sample.At each station,two quantitative samples were taken with a 167μm Surber net,and the samples were sieved with a 167μm net,sorted in a porcelain dish with naked eye.The samples were kept in 10% formalin for later processing.The life cycle of the Simulium sp.population was analyzed by the monthly size-class frequency distribution,the cohort and annual production were estimated by size frequency method.The results showed that the dominant species Simulium sp.appeared to develop one generation for one year,the reproduction occurred from April to August,but mainly in middle three months.The abundance and biomass of the population reached their peaks in December with the values of 115 ind·m-2 and 250.9mg·m-2.The estimated cohort and annual production by size-frequency method were 3.9216g·m-2.a(wet wt),and the cohort P/B ratios was 4.6,which equals to the annual one.By analyzing its fore-gut content,the proportions of amorphous detritus,fungi and diatoms were 60.40%,3.91%,35.96%.Therefore,the contribution rates of the above types of food to secondary production were 32.2%,10.4%,57.4%.
闫云君*, 李晓宇. 黑竹冲河蚋的周年生产量及其营养基础分析[J]. , 2006, 25(4): 308-311.
YAN Yun-jun, LI Xiao-yu. Secondary production and its trophic basis of Simulium Spin Heizhuchong Stream. , 2006, 25(4): 308-311.
[1] Benke A C.1993.Baldi Memorial Lecture:Concepts and patterns of invertebrate production in running waters[J].Verhandlung der Internationale Vereinigung für theoretische und angewandte Limnologie,25:15-38.
[3] Hynes H B N and M J Coleman.1968.A simple method of assessing the annual production of stream benthos[J].Limnology Oceanography,13:569-573.
[4] Hamilton A L.1969.On estimating annual production[J].Limnology Oceanography,14:771-782.
[5] Georgian T and J B Wallace.1983.Seasonal production dynamics in a guild of periphyton-grazing insects in a southern Appalachian stream[J].Ecology,64:1236～1248.
[6] Menzie C A.1980.A note on the Hynes method of estimating secondary production[J].Limnology Oceanography,25(4):770-773.
[7] McCall P J,Wilson M D,B D Dueben,et al.1997.Similarity in oviposition aggregation pheromone composition within the Simulium damnosum(Diptera:Simuliidae) species complex[J].Bulletin of Entomological Research,87:609-616.
[8] Garms R and Walsh J F.1987.The migration and dispersal of blackflies:Simulium damnosum s.l.,the main vector of human onchocerciasis.pp.201-214 in Kim,K.C.& Merritt,R.W.(Eds) Blackflies.Ecology,population management,and annotated world list[M].The Pennsylvania State University Press,University Park and London.
[9] Hall R O Jr,Likens G E and Malcom H M.2001.Trophic basis of invertebrate production in 2 streams at the Hubbard Brook Experimental Forest[J].Journal of the North American Bentholo gical Society,20(3):432-447.
[10] Wallace J B,Benke A C,Lingle A H,et al.1984.Trophic pathways of macroinvertebrate primary consumers in subtropical blackwater streams[J].Archiv für Hydrobiologie(Suppl.),74(4):423-451.
