海拔与林隙对色季拉山急尖长苞冷杉林土壤线虫群落的影响
Effects of elevation and forest gap on soil nematode communities in Abies georgei var.smithii forest in the Sejila Mountains
高宛宛 1侯磊 2卢杰 3任毅华3
作者信息
- 1. 西藏农牧学院资源与环境学院,西藏林芝 860000
- 2. 西藏农牧学院资源与环境学院,西藏林芝 860000;西藏高原森林生态教育部重点实验室,西藏林芝 860000
- 3. 西藏高原森林生态教育部重点实验室,西藏林芝 860000
- 折叠
摘要
为了解青藏高原高寒森林土壤线虫对海拔及林隙的响应,选取藏东南色季拉山急尖长苞冷杉林为研究区,采用高通量测序技术分析森林内不同海拔和林隙下土壤线虫群落差异.结果表明:在研究区的急尖长苞冷杉林中,土壤线虫多样性随海拔降低而增加;林隙的线虫多样性略高于林内,但差异不显著;海拔变化显著改变土壤线虫群落结构,但林隙与林内线虫群落结构较为相似;刺嘴纲(Enoplea)和三矛目(Triplonchi-da)在该森林的中海拔(4292 m)占比最高;土壤含水量、磷含量(包括全磷和有效磷)和镍含量是影响土壤线虫多样性的主要因子,林隙导致的土壤重金属及养分变化则是影响土壤线虫群落结构的关键因子.
Abstract
To understand the responses of soil nematodes in alpine forests of the Tibet Plateau to altitude and forest gaps,differences in soil nematode communities among elevations and between forest and forest gaps in an Abies georgei var.smithii forest of the Sejila Mountains in southeast Tibet were analyzed using high-throughput sequencing techniques.The results showed that soil nematode diversity increased with decreasing altitude,while nematode diversity was slightly higher in forest gaps than within forests without statistical significance at the same elevation.Enoplea and Triplonchida were the most dominant taxa at mid-elevation(4292 m).The soil nematode community structure varied significantly with the altitude,but exhibited similar between the gap and the forest.Soil water con-tent,phosphorus content(including total and available phosphorus),and nickel content were the major factors affecting soil nematode diversity,while soil heavy metal and nutrient changes induced by forest gaps were the key factors affecting soil nematode community structure.
关键词
土壤线虫/海拔/林隙/急尖长苞冷杉/色季拉山Key words
soil nematode community/elevation/forest gap/Abies georgei var.smithii forest/Sejila Mountain引用本文复制引用
基金项目
西藏农牧学院青年基金(NYQNKY2023-05)
国家自然科学基金(32360373)
西藏高原森林生态教育部重点实验室协同创新能力提升项目(藏财预指2023-1号)
出版年
2024
国家科技期刊平台
NSTL
万方数据