平原农业区生物多样性变化趋势调查——以衡水为例

Biodiversity Investigation in Agricultural Area of Plain——Take Hengshui Area as an Example

以衡水为例调查了平原农业区常见生物近30年来的变化趋势,结果显示:少数r-选择生物,如蚜虫种群数量有所增加外;绝大多数生物的种群数量呈减小趋势,其中两栖动物青蛙和蟾蜍类种群数量下降最为明显;个别生物如狗獾已基本绝迹.造成平原农业区生物多样性降低的主要原因为:水环境减少或消失;原生、半原生减少或消失;现代农业生产方式的影响;现代农村住宅的变化等等.

We investigated the trends of biodiversity in plain agricultural areas in past 30 years. The results showed that： a small number of r-selection species, such as the aphid population increase; the population of most species was reduced, in which frogs and toads amphibians stocks decline was most pronounced; a small number of species, such as badger has been basically eliminated. The main reasons for reduced biological diversity： reduced or disappeared water environment; reduced or disappeared native and semi-native; the impact of modern agricultural production methods; changes in rural housing, etc.