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Titre du document / Document title

The effect of agricultural diversity and crop choice on functional capacity change in grassland conversions

Titre de regroupement

The Future of Agri-Environment Schemes

Auteur(s) / Author(s)

LIN Brenda B. (1 2) ; FLYNN Dan F. B. (2) ; BUNKER Daniel E. (2) ; URIARTE María (2) ; NAEEM Shahid (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) The Earth Institute, Columbia University, Hogan Hall B-19, 2910 Broadway, MC 3277, New York, NY 10025, ETATS-UNIS
(2) Department of Ecology, Evolution, and Environmental Biology, Columbia University, 1200 Amsterdam Avenue, 10th Floor Schermerhorn Ext., New York, NY 10027, ETATS-UNIS

Résumé / Abstract

1. Given that approximately one-quarter of grasslands worldwide have been converted to agriculture, understanding the consequences of agricultural conversion for ecosystem functioning can provide insight into potential changes in the world's most intensively managed biomes. The Great Plains of the United States represents a major grassland region that has experienced substantial conversion of prairie grassland ecosystems to agriculture, leading to widespread changes in plant species composition and functional trait diversity. While the converted system dramatically improves food, fuel and fibre production, changes in plant trait diversity may alter the capacity of these ecosystems to provide sustaining and regulating services to society. 2. Using three key plant functional traits, we illustrate how the trait composition and trait diversity of the Great Plains plant communities has been dramatically altered when visualized in multidimensional trait space, showing strong displacement and a 10-fold reduction in trait space volumes, as systems have shifted from grassland to agricultural regimes. However, individual case studies demonstrate large variation in the direction and magnitude of trait diversity change during conversion, with some case studies exhibiting much larger reductions in trait diversity from the average on conversion, largely a consequence of the changes in species richness accompanying agricultural conversion. 3. Synthesis and applications. The conversion of grassland to agriculture does not necessarily lead to a loss of functional trait diversity, as crop choice and diversity can ameliorate the functional trait differences between native-dominated and agricultural communities. In this study, regardless of the sign and magnitude of change in trait space, a shift in trait range was observed, reflecting the dramatically different selection that agricultural plant functional traits experience compared with their native counterparts. Historical agricultural policy and modern land-use patterns have led to a landscape with decreasing plant diversity and functional capacity. However, initiatives to increase agricultural diversity on-farm and at the landscape level through the implementation of cover crops of the perennialization of cropping systems may allow ecosystems to recover and maintain greater functional capacity.

Revue / Journal Title

Journal of applied ecology    ISSN  0021-8901   CODEN JAPEAI 

Source / Source

2011, vol. 48, no3, pp. 609-618 [10 page(s) (article)] (3/4 p.)

Langue / Language

Anglais

Editeur / Publisher

Blackwell, Oxford, ROYAUME-UNI  (1964) (Revue)

Mots-clés anglais / English Keywords

Great Plains

;

Functional trait

;

Ecosystem services

;

Land use

;

Conversion

;

Grassland

;

Diversity

;

Agriculture

;

Mots-clés français / French Keywords

Grandes Plaines Amérique Nord

;

Trait fonctionnel

;

Services écosystémiques

;

Occupation sol

;

Conversion

;

Prairie

;

Diversité

;

Agriculture

;

Mots-clés espagnols / Spanish Keywords

Grandes Llanuras América del Norte

;

Ocupación terreno

;

Conversión

;

Pradera

;

Diversidad

;

Agricultura

;

Mots-clés d'auteur / Author Keywords

agricultural management

;

convex hull volume

;

ecosystem services

;

functional traits

;

Great Plains

;

land use change

;

Localisation / Location

INIST-CNRS, Cote INIST : 11538, 35400019158733.0120

Nº notice refdoc (ud4) : 24178566



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