| Impacts of species interactions on grass community productivity under contrasting management regimes. | |
| | |
MedLine Citation:
|
PMID: 21935663 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Productivity-diversity relationships are routinely described mainly in terms of species richness. However, these relationships can be affected by the functional strategy and physiological plasticity characterizing each species as they respond to environment and management changes. This study, therefore, aimed to analyze species interactions in grass communities presenting the same number of species (n = 6) but different growth strategies, and the impact on community productivity across several forms of field management (two different fertilizer application rates, i.e. 120 and 360 kg N ha(-1) year(-1), and two cutting frequencies, i.e. 3 and 6 cuts per year). For this purpose, we applied the tripartite partitioning method introduced for the analysis of biodiversity effects (BE). Grass species were cultivated on small plots (4.2 m(2)) in both mixtures and monocultures. Different management regimes altered both net BE and its component effects: dominance and potential for complementarity. A higher cutting frequency significantly reduced net BE, via a reduction in dominance effect. We found that increased N supply could either increase or decrease complementary effect according to grass mixture composition, i.e. species strategy. Regardless of management intensity, net BE was in general significantly positive especially when including individual species-specific plasticity effects. We conclude that a combination of different grasses has a positive effect on community biomass. Furthermore, both the functional strategy and the functional plasticity of component species play an important role in the intensity of BE. Therefore, biological mechanisms leading to enhanced biomass in six-grass communities are as effective for productivity as management conditions. |
| | |
Authors:
|
Laíse da Silveira Pontes; Vincent Maire; Frédérique Louault; Jean-François Soussana; Pascal Carrère |
Related Documents
:
|
11246923 - The job no ceo should delegate. 11188403 - Total absence management: practical solutions to prevent and minimize employee absence. 23676383 - Water scarcity and institutional change: lessons in adaptive governance from the drough... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-9-21 |
Journal Detail:
|
Title: Oecologia Volume: - ISSN: 1432-1939 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
|
Created Date: 2011-9-21 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0150372 Medline TA: Oecologia Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
UR874, Unité de Recherche sur l'Ecosystème Prairial, INRA, 63100, Clermont-Ferrand, France, laisepontes@iapar.br. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Spatiosurvival analysis of mortality on smallholder dairy farms in Tanga and Iringa regions of Tanza...
Next Document: Local versus regional intraspecific variability in regeneration traits.