求翻译：单位面积的人口数量反映自然生态系统类型的土地利用方式，草地、林地起负影响，林地生态系统具有水源涵养功能，有助于清水产流机制的恢复，草地在流域内多属于氮磷营养盐亏损生态系统，林、草地生态系统在一定程度会对水土流失和营养盐入湖负荷起削减作用是什么意思？

Reflected in the number of population per unit area of ​​natural ecosystems types of land use, grassland, forest land from the negative effects of water conservation forest ecosystems function, helps clear mechanism for the recovery of aquatic streams, meadows in the basin are mostly nitrogen and ph

Flat size of the population reflect the natural ecosystem types of land use patterns, grassland, woodland, with woodland ecosystems have negative impact on water features, help to clear water output stream restoration of mechanisms within a river basin, and pitch in many ecosystems that are nitrogen

The unit area population quantity reflection natural ecosystem type land utilization way, the lawn, the forest land play the negative influence, the forest land ecosystem have the water source self-control function, is helpful flows the mechanism in the clear aquatic product the restoration, the law

Population per unit area reflect the natural ecological system types of land use patterns, negative effects of grassland, woodland, woodland ecosystem has the function of water conservation, helped clear of flow mechanisms in aquatic restoration, grassland belonging to nitrogen and phosphorus losses

The size of population of the unit area reflects the land of the natural ecosystem type utilizes the way, meadow, Lin Di get up to shoulder the influence, the ecosystem of forest land has sources of water that nourishes and cherishes the function, help clear aquatic products flow recovery of mechani