Abstract
Agri-environment schemes (AES) have been established to counteract negative effects of agricultural intensification on e.g. semi-natural pastures and meadows. The efficiency of most AESs have, however, been poorly evaluated. We evaluated the success of a Swedish AES for the management of semi-natural pastures by comparing species richness and composition of vascular plants (except trees), epiphytic lichens and trees among pastures receiving higher (high value pastures) and lower levels of AES paymens (general value pastures). There was no difference in the number of tree species among high and general value pastures, even though AES regulations allow a maximum of 60 and 100 trees/ha in general and high value pastures, respectively. High value pastures had, however, a higher number of plant and epiphytic lichen species than common value pastures. Moreover, a higher number of pasture specialist plant species were indicative of high value pastures than of general value pastures. No lichen species indicating high value pastures are associated with habitats with low canopy cover (such as e.g. pastures). Finally, tree identity was an important factor for explaining the number and composition of epiphytic lichen species. Our study highlights that species groups can respond differently to agri-environment schemes and other conservation measures. Even though the effects are the desired on the diversity of one assessed taxon, this is not always the case for non-target organism groups.
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Acknowledgments
Mattias Lif and Anders Eriksson assisted with the field work and Måns Svensson assisted with identification of lichens. Johan Ekroos gave valuable comments on a previous manuscript version. This study was funded by the Carl Trygger foundation. EÖ received additional support from the Swedish research council Formas.
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Communicated by Daniel Sanchez Mata.
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Caruso, A., Öckinger, E., Winqvist, C. et al. Different patterns in species richness and community composition between trees, plants and epiphytic lichens in semi-natural pastures under agri-environment schemes. Biodivers Conserv 24, 1729–1742 (2015). https://doi.org/10.1007/s10531-015-0892-x
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DOI: https://doi.org/10.1007/s10531-015-0892-x