Characteristics of plant community composition in typical catchments of landslide- dammed reservoirs in gully regions on Central Loess Plateau

Zhang Jielin; Wang Xiaqing; Lü Feiya; Deng Du; Tang Xiangling; Zhang Hangyu

doi:10.13961/j.cnki.stbctb.2025.01.011

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Characteristics of plant community composition in typical catchments of landslide- dammed reservoirs in gully regions on Central Loess Plateau

- Characteristics of plant community composition in typical catchments of landslide- dammed reservoirs in gully regions on Central Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 45, Issue 1, Pages: 94-104(2025)
- 作者机构：
  
  1. 湖南文理学院地理科学与旅游学院,湖南,常德,415000
  2. 青海省地震局,青海,西宁,810000
  3. 桂林理工大学地球科学学院,广西,桂林,541000
  4. 中国科学院地球环境研究所,陕西,西安,710061
  5. 湖南文理学院生命与环境科学学院,湖南,常德,415000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.01.011
  CLC： P951;Q948;X171.4
- Published：2025
- 稿件说明：
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Zhang Jielin, Wang Xiaqing, Lü Feiya, et al. Characteristics of plant community composition in typical catchments of landslide- dammed reservoirs in gully regions on Central Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 94-104.
DOI：

Zhang Jielin, Wang Xiaqing, Lü Feiya, et al. Characteristics of plant community composition in typical catchments of landslide- dammed reservoirs in gully regions on Central Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 94-104. DOI： 10.13961/j.cnki.stbctb.2025.01.011.

摘要

[目的] 分析典型流域的植物组成，评价黄土高原生态修复状况，为进一步采用植被恢复措施巩固水土治理效果提供科学指导。[方法] 基于黄土高原中南部高塬沟壑区合水(HS)聚湫流域和中北部丘陵沟壑区靖边(JB)聚湫流域，详细调查两个流域的现有的植被类型，鉴定表土孢粉组成，并分析表土的含水量、粒度、550 ℃烧失量等物理特征。[结果] HS聚湫流域存在84科230属植物，而JB聚湫流域则存在78科223属植物。但HS聚湫流域多见木本植物、喜湿型草本植物、禾本科植物，总比例为51.74%，而JB聚湫流域的旱生型灌木和草本植物更丰富，总比例高达56.50%，这是两地气候特征、土壤属性和土地利用方式等因素共同作用的结果。自“退耕还林(草)”工程实施以来，HS和JB聚湫流域高植被覆盖度面积比例分别提升至82.61%和37.80%，但也存在外来植物入侵、本地植物比例不高、人工栽种植物常见等问题。[结论] 黄土高原小流域生态修复需充分考虑当地气候环境和林草植物特性，进而形成可持续的植被恢复和演替。

Abstract

[Objective] The plant composition of typical catchment area of the Loess Plateau was analyzed to evaluate its ecological restoration status and provide scientific guidance for further implementation of vegetation restoration measures to improve the effectiveness of soil and water conservation. [Methods] Based on the Heshui (HS) and Jingbian (JB) landslide-dammed reservoir catchments located in the plateau-gully region of the southern central area and the hill-gully region of the northern central area of the Loess Plateau

respectively

comprehensive surveys were conducted to document the existing vegetation types

identify the pollen composition in the topsoil

and analyze the physical properties of the topsoil

including water content

grain size

and loss on ignition at 550 ℃. [Results] In total

230 genera from 84 families were identified in the HS catchment

and 223 genera from 78 families were identified in the JB catchment. Nevertheless

there was a higher abundance of woody plants

moisture-loving grasses

and herbs around the HS catchment (51.74%)

whereas xerophytic shrubs and herbs dominated around the JB catchment (56.50%). These patterns reflected a combination of climatic conditions

soil properties

land use conditions

and agricultural and economic development. In addition

the current high vegetation coverage area under the 'Grain for Green’ project accounted for 82.61% and 37.80% of the area around the HS and JB catchments

respectively. However

certain adverse phenomena

including invasive non-native plant species

a low proportion of indigenous flora

and a noticeable presence of artificial plants

have been observed. [Conclusion] To ensure sustainable vegetation regeneration

ecological restoration of small catchments in the Loess Plateau should fully consider the local climate and plant characteristics.

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references

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