黄河三角洲植物多样性与生态系统多功能性间的关系

Relationship between plant diversity and ecosystem multifunctionality in the Yellow River Delta

以生境多变的黄河三角洲自然保护区为研究地,对黄河三角洲植物群落进行野外调查,探究自然生态系统中植物多样性与生态系统多功能性之间的关系。研究发现,植物物种丰富度、植物多样性Shannon指数和Simpson指数都与生态系统多功能性呈显著的正相关关系,而植物物种丰富度对生态系统多功能性变化的解释量最大,表明生态系统同时维持和提供多种服务功能需要更多的植物物种数量来支撑。土壤盐分是影响黄河三角洲植物多样性和生态系统多功能性的主要环境因素,土壤盐分的升高直接引起植物多样性的降低,从而间接导致生态系统多功能性下降。

The Yellow River Delta is selected as the study area and the relationship between plant diversity and ecosystem multifunctionality is explored.The species richness,Shannon index and Simpson index are positively related to ecosystem multifunctionality,but species richness has a larger effect than Shannon index and Simpson index.High biodiversity has been shown to be especially important for simultaneously sustaining multiple ecosystem functions at high levels.Soil salinity is the main environmental factor that affects the plant diversity and ecosystem multifunctionality.High Soil salinity directly decreases the plant diversity,and indirectly results in the descend of ecosystem multifunctionality.