地表水体中藻类、底栖动物和微生物分布的空间演化及其对流域生态水文格局的响应——以辽河中下游流域为例

THE SPATIAL EVOLUTION OF THE DISTRIBUTION OF THE ALGA, CREATURES DWELLING IN THE BOTTOM AND THE MICROBES IN THE SURFACE WATER AND THE RESPONSE TO THE ECO-HYDROLOGICAL PATTERNS OF THE BASIN -A case on the, mid and lower reaches of the Liaohe River

通过1996～2000年对辽河中下游流域地表水体25个断面的连续监测,采用“分布重心”模型,研究了地表水体中藻类、底栖动物和微生物分布的空间演化特征.结果表明,辽河中下游地表水体尤其是浑河河水的生物污染较为严重;藻类和细菌分布中心的位置均有向西北方向发生迁移的趋势,大肠杆菌分布中心的位置有向西南方向迁移的趋势,底栖动物的分布中心的位置有向东北发生迁移的趋势,同时,总体平均分布中心的位置有向西北方向迁移的趋势.以1999年为例,通过与林地、耕地、化肥、日照、气温、降雨、径流等生态水文因子的相关分析,结果表明,辽河中下游流域地表水体中藻类、底栖动物和微生物的空间分布特征与流域生态水文格局有较好的响应关系.

The spatial evolution characteristics of the distribution of the alga, creature dwelling in the bottom and the microbes in the surface water were derived based on the continuously monitoring on the 25 sections between 1996 and 2000 in the mid and lower reaches of the Liaohe River Basin and the usage of the Distribution Center Model. The bio-pollution of the surface water in the mid and lower reaches of the Liaohe River Basin especially in the Hunhe River is serious. The migrations of distribution centers of the alga and the bacterium have the trend to the Northeast, that of the large intestine bacillus to the Southwest and that of the creatures dwelling in the bottom to the Northwest, at the same time, the total average distribution center migrates to the Northwest. Take 1999 as the example, base on the analysis with the eco-hydrological indexes namely woodland, plowland, fertilizer, sunlight, air temperature, precipitation and runoff, the result which the spatial distributions of the alga, the creatures dwelling in the bottom and the microbes are response to the eco-hydrological patterns intensively was also derived.