Characteristics and Influencing Factors of Plant Diversity in Ditches of the Hani Terraces
Hani Terrace ditch is a kind of artificial stream with wetland properties,which is the key to the sustain-able development of Hani Terrace.In order to find out the relationship between plant diversity and environmental factors in different ditches of Hani terrace,the relationship between vegetation community composition,species di-versity and environmental factors in different ditches of Hani terrace was analyzed by using quadrat survey method,variance analysis and redundancy analysis.The results showed that:(1)There were 118 species belonging to 45 families and 100 genera,mainly Asteraceae and Poaceae,accounting for 28.81％of the total species;The plant eco-type was mainly composed of humidophytes(52 species),followed by mesophytes(42 species).(2)The Shannon-Wiener diversity index,the Margalef richness index and the Simpson dominance index decreased in the order:tertiary ditch＞disconnected ditch＞secondary ditch＞primary ditch;The Pielou evenness index decreased in the order:seconda-ry ditch＞tertiary ditch＞primary ditch＞disconnected ditch;(3)Redundancy analysis showed that disturbance degree had the most significant effect on plant diversity,followed by elevation and soil organic carbon,while soil total nitro-gen,total phosphorus,total potassium,pH and water depth had relatively little effect on plant diversity in Hani ter-race.The ditch habitat of Hani terrace was most strongly affected by the degree of human disturbance,and moderate human disturbance contributed to the level of plant community diversity in the ditch.The results of this study provide a reference for the conservation of plant resources and the healthy development of terrace ecosystem in Hani terrace.
The Hani terracesconstructed wetlandditch plantdiversityenvironmental factors
万方数据
维普
