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Congruent responses of vascular plant and ant communities to pastoral land-use abandonment in mountain areas throughout different biogeographic regions

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Ecological Processes 2022年第1期11卷 469-482页

作者： Marcello Verdinelli Marco Pittarello Maria Carmela Caria Giovanna Piga Pier Paolo Roggero Gian Marco Marrosu Stefano Arrizza Maria Leonarda Fadda Giampiero Lombardi Michele Lonati Ginevra Nota Maria Sitzia Simonetta Bagella Institute of BioEconomy(CNR IBE) National Research Council of Italy07100 SassariItaly Department of Agricultural Forestand Food Science(DIS-AFA)University of TorinoTorinoItaly Department of Chemistry and Pharmacy University of Sassari07100 SassariItaly Department of Agricultural Sciences University of Sassari07100 SassariItaly Desertification Research Center University of Sassari07100 SassariItaly AGRIS Sardegna Loc.Bonassai07100 SassariItaly

Background:There is a long-term trend towards the abandonment of agro-pastoral activities in the mountain areas of Europe:the following encroachment process of semi-natural grasslands by shrubs is one of the main severe threats to the conservation of biodiversity in mountain *** better understand the impact of land abandonment,we analysed the reliability of plant functional groups,ant traits,and ant functional groups as indicators of land use *** carried out the research in Italy at four sites along a latitudinal/altitudinal gradient in three biogeo-graphic regions(Mediterranean,Continental,Alpine).We identified three stages of a chronosequence at each site as representative of the plant succession in response to pastoral land-use ***:As expected,both the plant and ant assemblages considerably differed across sites at the species level and,within each site,among the three *** trend was found also using ant traits,functional groups of ants,and plant functional *** and plant communities were related in terms of composition and *** ants and ants with collective foraging strategy were associated with annual legumes and grasses(Therophytes);ants with a strictly individual foraging strategy with *** traits and plant functional groups indicated significant differences among the three stages of the ***,ant functional groups could not discriminate between the stages represented by secondary grasslands currently grazed and shrub-encroached grasslands ***:Despite some limitations of ant functional groups in explaining the succession stages of land abandonment,our results suggest that ants are a good surrogate taxon and might be used as bioindicators of land-use changes and ecosystem ***,our findings indicate that the functional group approach should be applied to other European ***,reducing the taxonomic complexity could cont

关键词： Biodiversity conservation Bioindicators Cross-taxon congruence Functional groups Land abandonment Monitoring mountain pastures

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