1, strengthen the awareness of ecological protection 2, use technical means 3, increase the intensity of urban sewage treatment 4, respect the natural form of rivers. Second, the river ecosystem has the following characteristics:
1, with vertical zoning, but the vertical substitution of species is uneven and continuous, and special populations can reappear in the whole river;
2. Most living things have special morphological structures that adapt to rapids. It is characterized by the decrease of plankton; Most benthic organisms have flat bodies. Linear homoflow or sucker structure; Fish and microorganisms are rich and adaptable;
3. The interaction with other ecosystems is complex. On the one hand, climate, vegetation and human disturbance intensity have great influence on river ecosystem; On the other hand, the river ecosystem obviously affects the formation and evolution of coastal ecosystems (especially estuaries and bays);
4. Strong self-purification ability and quick recovery after interference. The biota of healthy river ecosystem mainly includes plankton and zooplankton, attached biota, staggered biota and benthic biota. Plankton and swimming biota refer to plankton or swimming organisms in flowing water in river aquatic biota. Only when the growth rate of phytoplankton in the river reaches the level that the population can increase exponentially when the current stays, can its population be maintained. Zooplankton and zooplankton are very sensitive to the changes of river hydrological conditions, such as velocity, water temperature and riverbed erosion, and toxic substances entering the river. Legal basis: Law of People's Republic of China (PRC) on the Protection of the Yangtze River Article 1 This Law is formulated in order to strengthen the protection and restoration of the ecological environment in the Yangtze River basin, promote the rational and efficient utilization of resources, ensure ecological security, and realize the harmonious coexistence between man and nature and the sustainable development of the Chinese nation.