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Document: Extrait d'ouvrage

Impact of nitrogen deposition on species richness of calcareous grasslands in Europe - some preliminary results / Didier Alard (2011)

Chapitre 5.6 (2011)

est un extrait de Nitrogen deposition and Natura 2000 / W. Kevin Hicks (2011)

Livre (2011)

Titre :	Impact of nitrogen deposition on species richness of calcareous grasslands in Europe - some preliminary results
Type de document :	Extrait d'ouvrage
Auteurs :	Didier Alard ; Edu Dorland (1974-) ; C. Dupre ; C. Stevens ; Cassandre Gaudnik ; Emmanuel Corcket ; N. Dise ; Martin Diekmann ; Roland Bobbink ; Per Arild Aarrestad ; Vigdis Vandvik ; D. Gowing
Année de publication :	2011
Importance :	p. 154-160
Résumé :	This paper seeks to determine whether N-deposition has a negative impact on the species richness of calcareous grasslands at a European wide scale. 100 calcareous grasslands across the Atlantic region of Europe were sampled in one season. Species composition and richness of vegetation communities were compared to some key environmental drivers (climate and N deposition) indirectly estimated via surrogates (latitude, longitude, N concentration in bryophyte tissue). There are marked differences in species composition across the calcareous grasslands of the Atlantic biogeographic zone within Europe. Contrasts in mean species richness between regions are also detectable at a European wide scale. These natural gradients may mask any footprint of N deposition on vegetation at a European-wide scale. For grasslands located along the western range of distribution, there are indications of a decline in species richness as N concentration in moss increases. This suggests that N deposition may be reducing biodiversity in calcareous grasslands at a wide scale, but that this impact can only be detected at the regional, rather than cross-European, level. Further research is needed to investigate the impact of N deposition on calcareous grasslands, particularly through the direct assessment of potential drivers as well as the characterisation of variations in species pools at the European scale.
Lien pérenne :	HAL : hal-02806606
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150039

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Chapitre 5.6 (2011) - application/pdf

Chapitre 5.6 (2011)

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