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Effects of increased N availability on biodiversity of\ud Mediterranean-type ecosystems: a case study in a\ud Natura 2000 site in Portugal.

By T. Dias, S. Malveiro, S. Chaves, R. Tenreiro, C. Branquinho, M.A. Martins-Loução, L.J. Sheppard and C. Cruz

Abstract

• Although Mediterranean-type ecosystems are biodiversity hotspots, very little is known\ud about the effects of increased N availability in these systems;\ud • This paper describes an integrated field study on the effects of increased N availability in a\ud Mediterranean-type ecosystem in a Natura 2000 site in Portugal;\ud • The ecosystem was highly N responsive: visible changes were seen within one year; N\ud additions created new and distinct seasonal patterns of soil N availability; plant and soil\ud bacterial diversity together with plant cover were increased;\ud • The effects of increased N availability appeared to depend on N form - plant evenness; N\ud dose - plant species richness; and on both N form and dose - species cover and soil bacterial\ud richness

Publisher: COST Office - European Cooperation in Science and Technology
Year: 2011
OAI identifier: oai:nora.nerc.ac.uk:16299
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