Arid
DOI10.1007/s12080-017-0356-x
Zooming in on coarse plant functional types-simulated response of savanna vegetation composition in response to aridity and grazing
Lohmann, Dirk1; Guo, Tong2,3; Tietjen, Britta2,3,4
通讯作者Lohmann, Dirk
来源期刊THEORETICAL ECOLOGY
ISSN1874-1738
EISSN1874-1746
出版年2018
卷号11期号:2页码:161-173
英文摘要

Precipitation and land use in terms of livestock grazing have been identified as two of the most important drivers structuring the vegetation composition of semi-arid and arid savannas. Savanna research on the impact of these drivers has widely applied the so-called plant functional type (PFT) approach, grouping the vegetation into two or three broad types (here called meta-PFTs): woody plants and grasses, which are sometimes divided into perennial and annual grasses. However, little is known about the response of functional traits within these coarse types towards water availability or livestock grazing. In this study, we extended an existing eco-hydrological savanna vegetation model to capture trait diversity within the three broad meta-PFTs to assess the effects of both grazing and mean annual precipitation (MAP) on trait composition along a gradient of both drivers. Our results show a complex pattern of trait responses to grazing and aridity. The response differs for the three meta-PFTs. From our findings, we derive that trait responses to grazing and aridity for perennial grasses are similar, as suggested by the convergence model for grazing and aridity. However, we also see that this only holds for simulations below a MAP of 500 mm. This combined with the finding that trait response differs between the three meta-PFTs leads to the conclusion that there is no single, universal trait or set of traits determining the response to grazing and aridity. We finally discuss how simulation models including trait variability within meta-PFTs are necessary to understand ecosystem responses to environmental drivers, both locally and globally and how this perspective will help to extend conceptual frameworks of other ecosystems to savanna research.


英文关键词Traits Dryland Degradation Shrub encroachment Simulation Eco-hydrological model EcoHyD
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000433982800004
WOS关键词TREE-GRASS COEXISTENCE ; SHRUB ENCROACHMENT ; AFRICAN SAVANNA ; SPECIES RICHNESS ; SEMIARID SAVANNA ; LAND-USE ; ECOSYSTEM MULTIFUNCTIONALITY ; RAINFALL VARIABILITY ; AUSTRALIAN SAVANNA ; CLIMATIC GRADIENT
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/2XILL650/213467
作者单位1.Univ Potsdam, Plant Ecol & Nat Conservat, Muhlenberg 3, D-14467 Potsdam, Germany;
2.Free Univ Berlin, Inst Biol, Biodivers & Ecol Modelling, Altensteinstr 34, D-14195 Berlin, Germany;
3.Free Univ Berlin, DCPS, D-14195 Berlin, Germany;
4.Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany
推荐引用方式
GB/T 7714
Lohmann, Dirk,Guo, Tong,Tietjen, Britta. Zooming in on coarse plant functional types-simulated response of savanna vegetation composition in response to aridity and grazing[J],2018,11(2):161-173.
APA Lohmann, Dirk,Guo, Tong,&Tietjen, Britta.(2018).Zooming in on coarse plant functional types-simulated response of savanna vegetation composition in response to aridity and grazing.THEORETICAL ECOLOGY,11(2),161-173.
MLA Lohmann, Dirk,et al."Zooming in on coarse plant functional types-simulated response of savanna vegetation composition in response to aridity and grazing".THEORETICAL ECOLOGY 11.2(2018):161-173.
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