Drought responses of Arrhenatherum elatius grown in plant assemblages of varying species richness

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dc.contributor.author Ochuodho, Dennis O.
dc.contributor.author Purcell, Andrew
dc.contributor.author Herold, Nadine
dc.contributor.author Grant, Kerstin
dc.contributor.author Tenhune, John
dc.contributor.author kuhnlein, Carl Beier
dc.contributor.author Jentsch, Anke
dc.contributor.author Kreyling, Juergen
dc.date.accessioned 2018-11-14T07:47:22Z
dc.date.available 2018-11-14T07:47:22Z
dc.date.issued 2011
dc.identifier.uri http://ir.jooust.ac.ke:8080/xmlui/handle/123456789/2699
dc.description.abstract Evidence exists that plant community diversity influences productivity of individual members and their resistance and resilience during and after perturbations. We simulated drought within the long-term EVENT experimental site in the Ecological-Botanical Garden, University of Bayreuth to understand how Arrhenatherum elatius (L.) responds to water stress when grown in three different plant assemblages. The set up consisted of five replications for each factorial combination of drought and plant assemblages differing in functional diversity. Leaf water potential (ΨL), leaf gas exchange, natural δ13C, plant biomass and cover were measured. Imposed drought had different effects on A. elatius, depending on plant assemblage composition. Severe water stress was however, avoided by slowing down the rate of decline in ΨL, and this response was modified by community composition. High ΨL was associated with high stomatal conductance and leaf photosynthesis. Biomass production of A. elatius increased due to drought stress only in the least diverse assemblage, likely due to increased tillering and competitive advantage against neighbors in the drought-treated plants. Our results indicate that beneficial traits among plant species in a community may be responsible for the enhanced capacity to survive drought stress. Resistance to drought may, therefore, not be linked to species richness, but rather to the nature of interaction that exists between the community members. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Arrhenatherum elatius en_US
dc.subject Drought stress en_US
dc.subject Productivity en_US
dc.subject Plant assemblages en_US
dc.subject Species interactions en_US
dc.title Drought responses of Arrhenatherum elatius grown in plant assemblages of varying species richness en_US
dc.type Article en_US


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