青藏高原高寒草甸地上植物功能群去除对土壤线虫群落的影响
Above-ground removal of plant functional groups on soil nematode communities in alpine meadows on the Qinghai-Tibet Plateau
黄丽改 1姜雪 1叶露萍 2郭辉 3周显辉 4郑勇 2王鹏 3左娟2
作者信息
- 1. 西藏大学生态环境学院,拉萨 850000;中国科学院武汉植物园,中国科学院水生植物与流域生态重点实验室,武汉 430074;中国科学院大学,北京 100049
- 2. 中国科学院武汉植物园,中国科学院水生植物与流域生态重点实验室,武汉 430074
- 3. 南京农业大学资源与环境科学学院,南京 210095
- 4. 兰州大学生态学院,兰州 730000
- 折叠
摘要
土壤线虫对高寒草甸生态系统功能有重要的指示作用,植物功能群丧失对土壤线虫群落的影响尚不清楚.本研究在青藏高原东部的高寒草甸生态系统中设置对照、保留豆科、保留禾状草、保留非豆科杂类草和去除所有植物功能群5个处理的地上部植物功能群去除实验,以探究植物功能群损失对土壤线虫群落的影响.结果显示:(1)去除植物功能群地上部对植物根系生物量和土壤线虫总密度影响不显著.(2)去除植物功能群地上部对线虫不同营养类群相对丰度影响显著.保留豆科处理下,食细菌线虫相对丰度整体最高,而植物寄生线虫相对丰度最低;保留杂类草处理下,植物寄生线虫相对丰度整体最高,而食细菌线虫相对丰度最低.(3)非度量多维尺度分析(NMDS)结果表明,去除不同植物功能群会导致土壤线虫类群产生差异,对土壤线虫群落结构产生显著影响.
Abstract
Soil nematodes play an important role in indicating the structure and function of alpine meadow ecosystems,yet the impact of plant functional group loss on soil nematode communities remains unclear.In this study,five treatments involving the removal of above-ground plant functional groups were established in an alpine meadow ecosystem of the eastern Qinghai-Tibet Plateau,including a control(CK),graminoids,legumes,forbs,and remove all.The aim was to explore the impact of plant functional group loss on soil nema-tode communities.Results showed that:(1)Above-ground removal of plant functional groups had no signifi-cant effect on plant root biomass and soil nematode total density.(2)Above-ground removal of plant functio-nal groups had a significant effect on the relative abundance of nematode trophic taxa.Under legume treat-ment,the relative abundance of bacterial feeder nematodes was the highest,while that of plant parasite nematodes was the lowest;under forbs treatment,the relative abundance of plant parasite nematodes was the highest,while that of bacterial feeder nematodes was the lowest.(3)Nonmetric multidimensional-scaling analysis(NMDS)showed that the removal of different plant functional groups led to differences in soil nematode taxa,with significant impact on soil nematode community structure.
关键词
高寒草甸/植物功能群/植物去除/土壤线虫群落/植物-土壤相互作用Key words
Alpine meadows/Plant functional group/Plant removal/Soil nematode community/Plant-soil interactions引用本文复制引用
基金项目
国家自然科学基金(32171646)
中国科学院水生植物与流域生态重点实验室开放基金(E0520205)
出版年
2024
NETL
NSTL
万方数据