草原生态系统功能对不同植被恢复模型下的植物功能特征的反应,在石沙漠化地区
Shuzhen Song1, Kangning Xiong2, Yongkuan Chi1,2
1School of Karst Science, Guizhou Normal University, Guiyang, China.
Frontiers in plant science
|December 27, 2023
概括
多年生草和白叶三叶草的混合牧场最好地恢复了草原生态系统的功能. 这项研究强调了有效的生态恢复和可持续发展的关键植物特征.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 恢复生态学 恢复生态学
背景情况:
- 植物的功能特征对于理解生态系统功能和预测生态恢复期间的变化至关重要.
- 植物特征对草原生态系统功能在正在恢复的石荒漠化地区的影响尚不清楚.
研究的目的:
- 在四种恢复模型中调查植物功能特征和生态系统功能的差异.
- 为了确定植物功能特征和生态系统功能之间的关系,在卡斯特荒漠化地区.
- 确定最有效的恢复策略,以改善草原生态系统功能.
主要方法:
- 选择了五种植物功能特征:植物高度 (H),特定叶面积 (SLA),叶干物质含量 (LDMC),根长度 (RL) 和根干物质含量 (RDMC).
- 测量社区加权平均值 (CWM) 的特征和功能特征多样性.
- 在四个恢复模型下评估了10个生态系统功能指数:Dactylis glomerata (DG),Lolium perenne (LP),Lolium perenne + Trifolium repens (LT) 和自然草原 (NG).
主要成果:
- 与NG相比,DG和LP的物种多样性 (Margalef,Shannon-Wiener) 较低,而DG和LP的功能丰富性 (FRic) 较高. 在DG和LP中,功能分散 (FDis) 和Rao的二次 (RaoQ) 较低.
- 植物高度 (CWMH),叶干物质含量 (CWMLDMC) 和根干物质含量 (CWMRDMC) 的社区加权平均值在DG,LP和LT中高于NG. 社区加权平均特定叶面积 (CWMSLA) 较低.
- 生态系统功能 (生产力,碳储存,水和土壤保护) 在LT模型 (Lolium perenne + Trifolium repens) 中最高,在NG中最低.
结论:
- 多年生草和白叶三叶草 (LT) 的混合牧场是最有效的恢复草原生态系统功能在石荒漠化地区.
- 社区加权平均叶干物质含量 (CWMLDMC),根长 (CWMRL) 和植物高度 (CWMH) 是生态系统功能的主要驱动因素.
- 结果为植被的建立,资源利用和在退化地生态系统的可持续发展提供了关键的见解.
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