Arid
DOI10.1016/j.ecolmodel.2018.04.009
The role of landscape heterogeneity in regulating plant functional diversity under different precipitation and grazing regimes in semi-arid savannas
Guo, Tong1,2,4; Weise, Hanna1; Fiedler, Sebastian1; Lohmann, Dirk3; Tietjen, Britta1,2,5
通讯作者Tietjen, Britta
来源期刊ECOLOGICAL MODELLING
ISSN0304-3800
EISSN1872-7026
出版年2018
卷号379页码:1-9
英文摘要

1. Savanna systems exhibit a high plant functional diversity. While aridity and livestock grazing intensity have been widely discussed as drivers of savanna vegetation composition, physical soil properties have received less attention. Since savannas can show local differences in soil properties, these might act as environmental filters and affect plant diversity and ecosystem functioning at the patch scale. However, research on the link between savanna vegetation diversity and ecosystem function is widely missing.


2. In this study, we aim at understanding the impact of local heterogeneity in soil conditions on plant diversity and on ecosystem functions. For this, we used the ecohydrological savanna model EcoHyD. The model simulates the fate of multiple plant functional types and their interactions with local biotic and abiotic conditions. We applied the model to a set of different landscapes under a wide range of livestock grazing and precipitation scenarios to assess the impact of local heterogeneity in soil conditions on the composition and diversity of plant functional types and on ecosystem functions.


3. Comparisons between homogeneous and heterogeneous landscapes revealed that landscape soil heterogeneity allowed for a higher functional diversity of vegetation under conditions of high competition, i.e. scenarios of low grazing stress. However, landscape heterogeneity did not have this effect under low grazing stress in combination with high mean annual precipitation. Further, landscape heterogeneity led to a higher community biomass, especially for lower rainfall conditions, but also dependent on grazing stress. Total transpiration of the plant community decreased in heterogeneous landscapes under arid conditions.


4. This study highlights that local soil conditions interact with precipitation and grazing in driving savanna vegetation. It clearly shows that vegetation diversity and resulting ecosystem functioning can be driven by landscape heterogeneity. We therefore suggest that future research on ecosystem functioning of savanna systems should focus on the links between local environmental conditions via plant functional diversity to ecosystem functioning.


英文关键词Plant functional type Trait diversity Ecosystem functioning Plant coexistence Soil texture Ecohydrological model
类型Article
语种英语
国家Germany ; Peoples R China
收录类别SCI-E
WOS记录号WOS:000433645000001
WOS关键词SPECIES RICHNESS ; SPATIAL HETEROGENEITY ; VEGETATION DYNAMICS ; SOIL TEXTURE ; ECOSYSTEM MULTIFUNCTIONALITY ; ENVIRONMENTAL HETEROGENEITY ; TRANSITION MODELS ; CLIMATE-CHANGE ; PATTERNS ; SCALE
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208762
作者单位1.Free Univ Berlin, Biodivers Theoret Ecol, Altensteinstr 34, D-14195 Berlin, Germany;
2.Free Univ Berlin, DCPS, D-14195 Berlin, Germany;
3.Univ Potsdam, Plant Ecol & Nat Conservat, Muhlenberg 3, D-14469 Potsdam, Germany;
4.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China;
5.Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany
推荐引用方式
GB/T 7714
Guo, Tong,Weise, Hanna,Fiedler, Sebastian,et al. The role of landscape heterogeneity in regulating plant functional diversity under different precipitation and grazing regimes in semi-arid savannas[J],2018,379:1-9.
APA Guo, Tong,Weise, Hanna,Fiedler, Sebastian,Lohmann, Dirk,&Tietjen, Britta.(2018).The role of landscape heterogeneity in regulating plant functional diversity under different precipitation and grazing regimes in semi-arid savannas.ECOLOGICAL MODELLING,379,1-9.
MLA Guo, Tong,et al."The role of landscape heterogeneity in regulating plant functional diversity under different precipitation and grazing regimes in semi-arid savannas".ECOLOGICAL MODELLING 379(2018):1-9.
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