摘要
通过研究祁连山东段高寒草甸不同放牧强度下有毒植物丰富度、Shannon-Wiener指数、Pielou均匀度指数变化,结果表明:轻度放牧区有毒植物3个生物多样性指数均较高,丰富度和Shannon-Wiener指数都显著性高于其他3个放牧区,但Peilou指数与中度放牧区差异不显著(P>0.05);同时轻度放牧区内有毒植物月份间变幅较大且差异显著(P<0.05)。过度放牧区有毒植物的3个多样性指数在6,7和8月都显著性高于中度和重度放牧区(P<0.05),但在10月显著低于其他3个放牧强度下有毒植物的生物多样性(P<0.05);同时过度放牧区内有毒植物丰富度月份间变幅最大且差异显著(P<0.05)。中度和重度有毒植物生物多样性指数较低,在6~8月,中度放牧区有毒植物的丰富度和Shannon-Wiener指数低于其他3个放牧区,但Peilou指数较高;同时中度和重度放牧区生物多样性指数月份间变幅较小。
The richness index,Shannon-Wiener index and Pielou evenness index of poisonous plants in alpine meadow under different grazing intensities were studied the in the eastern Qilian Mountains.The results showed that 3 biodiversity indices of poisonous plants in lightly-grazing group were high,and the richness index and Shannon-Wiener index were significantly higher than other 3 grazing groups(P<0.05),but there was no significant difference in Peilou index between lightly-grazing group and moderately-grazing group(P>0.05).The monthly variation of biodiversity indices of poisonous plants in lightly-grazing group was large and significant.(P<0.05).The three diversity indices of poisonous plants in overgrazing group were significantly higher than moderately-grazing and heavily-grazing groups in June,July and August(P<0.05),but significantly lower in October(P<0.05)than other 3 grazing groups.The richness index of poisonous plants in overgrazing group had the greatest variation among months and the difference was significant(P<0.05).The biodiversity index of poisonous plants in moderately and heavily-grazing groups was lower.The richness and Shannon-Wiener indices of poisonous plants in moderately-grazing group were lower than other 3 grazing groups from June to August,but the Peilou index was higher.The biodiversity indices of moderate and severe grazing groups changed slightly among months.
作者
王志鹏
张兆杰
花立民
WANG Zhi-peng;ZHANG Zhao-jie;HUA Li-min(College of Grassland Science,Gansu Agricultural University/Key Laboratory for Grassland Ecosystem of Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S.Centers for Grazingland Ecosystem Sustainability,Lanzhou 730070,China)
出处
《草原与草坪》
CAS
CSCD
2019年第5期75-81,共7页
Grassland and Turf
基金
川西北和甘南退化高寒生态系统综合整治项目(2017YFC0504803)
三江源区退化高寒生态系统恢复技术及示范项目(2016YFC0501902)
甘肃省高校协同创新科技团队支持计划项目
国家自然基金项目(31460635)资助
关键词
高寒草甸
有毒植物
群落特征
时空演替
alpine meadow
poisonous plant
community characteristics
temporal and spatial succession
