基于氮元素的水库生态系统服务需求评估

Using the core element that has a huge impact on the ecosystem - nitrogen element as a carrier, explore and quantitatively evaluate the losses caused to the reservoir ecosystem services due to excessive nitrogen element, and define the elimination of such losses as the demand of human society for the reservoir ecosystem services. Use the value accounting method to obtain the value of the reservoir ecosystem service demand, and the greater the loss value, the higher the demand. From the comparative analysis of the results in 2000 and 2015, it can be seen that whether in terms of total amount or area amount, the value of the ecosystem service demand of the Daquangou Reservoir is smaller than that of the Moguhu Reservoir; and from the inter-annual changes, it can be obtained that: the value of the ecosystem service demand of the Daquangou Reservoir, which is the key treatment area, decreases, while the value of the demand of the Moguhu Reservoir, which is still seriously polluted, increases, and the increase in the demand value is greater than the decrease, and there are still many difficulties in treating pollution. Therefore, it is urgent to strengthen governance and control pollution.

运用对生态系统有着巨大影响的核心元素———氮元素作为载体,探索并定量化评估由于氮元素过量而对水库生态系统服务造成的损失,并将这种损失的消除界定为人类社会对水库生态系统服务的需求,利用价值核算方法得出水库生态系统服务需求的价值,且损失价值越大,需求越高.从2000和2015年的结果对比分析得出,不论是从总量还是面积量上看,大泉沟水库生态系统服务需求的价值都比蘑菇湖水库的小;而从年际间变化中得出:重点治理的大泉沟水库生态系统服务需求的价值降低,而污染仍严重的蘑菇湖水库需求的价值增加,并且需求价值增幅大于降幅,治理污染仍存在很多难度.因此加强治理,控制污染刻不容缓.