腾格里沙漠东南缘不同植被类型土壤种子库多样性

doi:10.13287/j.1001-9332.202209.009

应用生态学报 ›› 2022, Vol. 33 ›› Issue (9): 2356-2362.doi: 10.13287/j.1001-9332.202209.009

腾格里沙漠东南缘不同植被类型土壤种子库多样性

孙瑜硕^1,2, 常选选^1,2, 张雪^2,3, 王磊^2,3*, 曲文杰^2,3, 秦伟春⁴, 张波⁴, 牛金帅⁴

¹宁夏大学农学院, 银川 750021;
²宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021;
³宁夏大学生态环境学院, 银川750021;
⁴宁夏中卫沙坡头国家级自然保护区管理局, 宁夏中卫 750021

收稿日期:2022-02-28 接受日期:2022-04-27 出版日期:2022-09-15 发布日期:2023-03-15
通讯作者: * E-mail: WL8999@163.com
作者简介:孙瑜硕, 男, 1994年生, 硕士研究生。主要从事水土保持与荒漠化防治研究。E-mail: 695672169@qq.com
基金资助:
宁夏重点研发计划项目(2021BEG03008)、国家自然科学基金项目(31760707)、宁夏回族自治区西部一流学科建设项目(NXYLXK2017B06)和宁夏自然科学基金项目(2021AAC03083)资助。

Diversity of soil seed banks under different vegetation types in the southeastern margin of the Tengger Desert, China

SUN Yu-shuo^1,2, CHANG Xuan-xuan^1,2, ZHANG Xue^2,3, WANG Lei^2,3*, QU Wen-jie^2,3, QIN Wei-chun⁴, ZHANG Bo⁴, NIU Jin-shuai⁴

¹College of Agriculture, Ningxia University, Yinchuan 750021, China;
²Ministry of Education Key Laboratory of Restoration and Reconstruction of Degraded Ecosystem in Northwest China, Ningxia University, Yinchuan 750021, China;
³College of Ecological Environment, Ningxia University, Yinchuan 750021, China;
⁴Ningxia Zhongwei Shapotou National Nature Reserve Administration, Zhongwei 750021, Ningxia, China

Received:2022-02-28 Accepted:2022-04-27 Online:2022-09-15 Published:2023-03-15

摘要/Abstract

摘要： 为探究荒漠地区不同植被类型土壤种子库动态与分布规律,揭示不同植被类型群落的植被演替趋势与多样性特征,以腾格里沙漠东南缘胡杨群落、柠条群落、赖草群落和沙蓬群落为对象,采集0～2、2～5、5～10、10～20 cm土层土样,研究土壤种子库特征及其与地上植被的关系。结果表明: 4个植被类型的土壤种子库中共发现13种植物,隶属于3科12属,1、2年生草本植物种子占多数,藜科植物较多;土壤种子库密度较低,呈现柠条群落＞赖草群落＞胡杨群落＞沙蓬群落;种子库密度和植物种类整体随土壤剖面的加深而降低;综合Shannon指数、Simpson指数、Pielou指数和Patrick丰富度指数进行分析,土壤种子库物种多样性呈现胡杨群落＞赖草群落＞柠条群落＞沙蓬群落,柠条群落土壤种子库与地上植被相似性系数最高,沙蓬群落次之,胡杨群落和赖草群落最低。总体上,以胡杨群落为代表的乔木林较为稳定,以沙蓬群落为代表的沙地生态系统最为脆弱。

关键词: 生态恢复, 土壤种子库, 腾格里沙漠, 植被动态

Abstract: To explore the dynamics and distribution of soil seed banks under different vegetation types in desert, and reveal the community succession tendency and diversity characteristics of different vegetative types, we took Populus euphratica community, Caragana intermedia community, Leymus secalinus community and Agriophyllum squarrosum community as the research objects in the southeastern margin of the Tengger Desert. Samples of 0-2 cm, 2-5 cm, 5-10 cm, and 10-20 cm soil layers were collected. We examined the characteristics of soil seed banks and their relationships with vegetation. The results showed that there were 13 plant species in the soil seed banks of the four vegetation types, belonging to 3 families and 12 genera, with the annual and biennial herbs dominated and much Chenopodiaceae species. The soil seed bank density was generally low, with an order of C. intermedia community > L. secalinus community > P. euphratica community > A. squarrosum community. The seed bank density and species richness decreased with increasing soil depth. Based on the Shannon index, Simpson index, Pielou index and Patrick richness analysis, the order of species diversity in soil seed banks was P. euphratica community > L. secalinus community > C. intermedia community > A. squarrosum community. The similarity coefficient between soil seed bank and vegetation was the highest in C. intermedia community, followed by P. euphratica community, and the lowest in P. euphratica community and L. secalinus community. On the whole, the arbor forest P. euphratica community was the most stable one, while the sandy land A. squarrosum community was the most vulnerable.

Key words: restoration ecology, soil seed bank, Tengger Desert, vegetation dynamics

孙瑜硕, 常选选, 张雪, 王磊, 曲文杰, 秦伟春, 张波, 牛金帅. 腾格里沙漠东南缘不同植被类型土壤种子库多样性[J]. 应用生态学报, 2022, 33(9): 2356-2362.

SUN Yu-shuo, CHANG Xuan-xuan, ZHANG Xue, WANG Lei, QU Wen-jie, QIN Wei-chun, ZHANG Bo, NIU Jin-shuai. Diversity of soil seed banks under different vegetation types in the southeastern margin of the Tengger Desert, China[J]. Chinese Journal of Applied Ecology, 2022, 33(9): 2356-2362.

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腾格里沙漠东南缘不同植被类型土壤种子库多样性

Diversity of soil seed banks under different vegetation types in the southeastern margin of the Tengger Desert, China

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