华东师范大学学报(自然科学版) ›› 2021, Vol. 2021 ›› Issue (2): 132-141.doi: 10.3969/j.issn.1000-5641.2021.02.013

• 生态与环境科学 • 上一篇    下一篇

重庆市郊不同弃耕年限旱地植物群落变化特征

郑明铭, 李笑寒, 黄力, 杨圣贺, 胡四维, 杨永川*()   

  1. 重庆大学 三峡库区生态环境教育部重点实验室, 重庆 400045
  • 收稿日期:2020-01-10 出版日期:2021-03-25 发布日期:2021-04-01
  • 通讯作者: 杨永川 E-mail:ycyang@cqu.edu.cn
  • 基金资助:
    科技部科技基础性工作专项(2015FY210200-4); 重庆市技术创新与应用示范专项重点研发项目(cstc2018jszx-zdyfxmX0007)

Variation characteristics of plant communities at abandoned farmlands of different ages in the Chongqing suburban area

Mingming ZHENG, Xiaohan LI, Li HUANG, Shenghe YANG, Siwei HU, Yongchuan YANG*()   

  1. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment (Ministry of Education), Chongqing University, Chongqing 400045, China
  • Received:2020-01-10 Online:2021-03-25 Published:2021-04-01
  • Contact: Yongchuan YANG E-mail:ycyang@cqu.edu.cn

摘要:

以重庆近郊区耕作旱地和3种不同弃耕年限的旱地为研究对象, 采用空间代替时间的方法, 对其植物群落的物种组成进行调查并分析弃耕后物种组成与群落类型的动态变化, 以及植物多样性的变化趋势. 结果发现, 春秋两季共记录了维管植物39科90属99种; 在TWINSPAN分类的二级水平上可以将耕作旱地、弃耕早期和弃耕晚期旱地分离, 随着弃耕年限的增加, 植物群落的优势生活型由一年生植物逐渐过渡到多年生植物, 木本植物开始成为优势种; 植物多样性在弃耕早期到中期阶段逐渐升高, 但在弃耕后期呈现下降的趋势.

关键词: 重庆近郊区, 弃耕旱地, 群落调查, 植物多样性

Abstract:

In this study, we investigated the plant species composition of three types of abandoned farmland and compared with cultivated farmland in the Chongqing suburban area. We analyzed dynamic changes in species composition and community type as well as trends in plant diversity. The results showed that a total of 99 species, 90 genera, and 39 families were recorded in the spring and autumn. At the second level of the TWINSPAN classification, the cultivated farmland, early abandoned farmland, and late abandoned farmland could all be distinguished. As the number of years since abandonment of the farmland increased, the dominant life form of the plant community gradually transitioned from annual to perennial, and woody plants began to become the dominant species. Plant diversity gradually increased from the early to middle stage of abandonment, but declined during the later stage.

Key words: Chongqing suburban area, abandoned farmland, community investigation, plant diversity

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