摘要
用4种不同的计算方法测定了鄱阳湖水生维管束植物的生物量。根据22个断面,199个采集点,398个样方的测定结果,得出鄱阳湖水生维管束植物的年生产量为431.76万吨(湿重),即相当于5.44×10^(-15)焦耳(能量)。其中,马来眼子菜、苦草和黑藻等3种合计约占总生物量的71.46%。全湖可供草食性鱼类食用的水生维管束植物约占总量的86.9%。文中还对4个植物带和9个群丛生物量的分布规律进行了讨论。提出了人工增殖草食性鱼类,调整湖中植被组成,保护和种植水生经济植物等合理开发利用鄱阳湖水生植物资源的初步建议。
This paper presents the results of investigations on the macrophytes in Poyang Lake, carried out in 1983—1984. Data on biomass, based on sampling along 22 transects (involving 4 habitat zones, 9 plant associations, and 199 sampling points), are presented, and a comparison is made for the middle and the lower Yangtze Basin. The conditions in relation to the biomass and seasonal changes for the plants of different ecological types have been analysed and discussed.Poyang Lake covers an area of about 2800 km^2. It has a peak average biomass of 1542 g/m^2 (wet weight)during August-September. The biomass of Potamogeton malaianus, Vallisneria spiralis and Hydrilla verticillata accounts for 71.5% of the total.Annual production of aquatic vegetation in the entire lake area amounts to 4,317,600 metric tons in wet weight or 1.3×10^(12) kcal. The macrophytes suitable for fish consumption account for 86.9% of the total biomass. The capacity of herbivorous fish production is estimated at 15632 metric tons.Suggestions on rationally exploiting and utilising the resources of macrophytes in the lake, such as stocking phytophagous fish, readjusting the composition of the aquatic vegetation, protecting and planting economic aquatic plants, are presented.
出处
《水生生物学报》
CAS
1987年第3期219-227,共9页
Acta Hydrobiologica Sinica
