Responses of Herbaceous Savanna Vegetation to Land Use and Habitat Conditions: Investigations along a Climatic Gradient in West Africa

草本稀树草原植被对土地利用和生境条件的响应：沿西非气候梯度的调查

• 批准号: 220402200
• 负责人: Professor Dr. Markus Bernhardt-Römermann
• 金额: --
• 依托单位: Laboratoire de Biologie et Ecologie Végétales
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/220402200?language=en
• 关键词: Responses; Herbaceous; Savanna; Vegetation; Land

Savanna ecosystems cover one eighth of the earth's land. They are characterised by the co-dominance of herbaceous vegetation and less-abundant woody species. In West Africa, savanna ecosystems are thought to undergo dramatic alterations in species composition in response to changes in climate and land use. However, little is known about how these factors interact to affect vegetation. Previous studies have focused primarily on woody species; studies of herbaceous species are lacking, despite the fact that these species comprise 75–90% of the biomass of the savanna. In this study, we will focus on the responses of herbaceous vegetation to the interaction of land use and climate variables in different habitats. First, we will identify general herbaceous species response patterns and processes using a functional trait approach. We assume that plants with similar ecological traits respond to environmental changes in similar ways. Second, we will monitor photosynthetic capacity parameters in the most dominant herbaceous savanna species as an eco-physiological assessment of competitive strength; this will be conducted in varying climatic conditions, land use regimes and habitats Finally, using a subset of herbaceous species representing different life-history types, we plan to investigate how local land-use intensity and climate affect plant populations to gain insights into the development of typical herbaceous savanna species.

稀树草原生态系统覆盖了地球八分之一的土地。它们的特点是草本植被和较少丰富的木本物种共同占主导地位。在西非，稀树草原生态系统由于气候和土地利用的变化，物种组成发生了巨大的变化。然而，人们对这些因素如何相互作用影响植被知之甚少。以前的研究主要集中在木本植物上；尽管草本物种占稀树草原生物量的75-90%，但对草本物种的研究仍然缺乏。在本研究中，我们将重点研究不同生境下草本植被对土地利用和气候变量相互作用的响应。首先，我们将使用功能性状方法确定一般草本物种的响应模式和过程。我们假设具有相似生态特征的植物以相似的方式对环境变化作出反应。其次，我们将监测大多数优势草本稀树草原物种的光合能力参数，作为竞争实力的生态生理评估；这将在不同的气候条件、土地利用制度和栖息地进行，最后，我们计划使用代表不同生活史类型的草本物种子集，研究当地土地利用强度和气候如何影响植物种群，以深入了解典型草本稀树草原物种的发展。

项目成果

Diversity and occurrence of herbaceous communities in West African savannas in relation to climate, land use and habitat

西非稀树草原草本群落的多样性和发生与气候、土地利用和栖息地的关系

• DOI: 10.1007/s12224-017-9303-2
• 发表时间: 2018
• 期刊: Folia Geobotanica
• 影响因子: 1.2
• 作者: Bernhardt-Römermann;Ouédraogo;Thiombiano
• 通讯作者: Thiombiano

Chlorophyll fluorescence and gas exchange measurements in field research: an ecological case study

• DOI: 10.1007/s11099-018-0809-5
• 发表时间: 2018-12-01
• 期刊: PHOTOSYNTHETICA
• 影响因子: 2.7
• 作者: Bucher, S. F.;Bernhardt-Roemermann, M.;Roemermann, C.
• 通讯作者: Roemermann, C.

Effects of climate, habitat and land use on the cover and diversity of the savanna herbaceous layer in Burkina Faso, West Africa

• DOI: 10.1007/s12224-017-9289-9
• 发表时间: 2017-07
• 期刊: Folia Geobotanica
• 影响因子: 1.2
• 作者: Desiree Jakubka;Anna Leßmeister;Karen Hahn;S. Traoré;K. Schumann;A. Thiombiano;M. Bernhardt‐Römermann