3 results on '"ABUNDANCE-BASED COVERAGE ESTIMATOR"'
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2. Assessing bee species richness in two Mediterranean communities: importance of habitat type and sampling techniques
- Author
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Ellen Lamborn, Ingolf Steffan-Dewenter, Ioannis Bazos, Olivia Messinger, Stuart P. M. Roberts, Simon G. Potts, Jacobus C. Biesmeijer, Bernard E. Vaissière, William E. Kunin, Riccardo Bommarco, Anders Nielsen, Michal Woyciechowski, Josef Settele, Thomas Tscheulin, Catrin Westphal, Theodora Petanidou, Michalis Vaitis, Hajnalka Szentgyörgyi, Norwegian University of Life Sciences (NMBU), University of the Aegean, University of Bayreuth, Georg-August-University [Göttingen], Southern Illinois University [Carbondale] (SIU), School of Agriculture Policy and Development, Centre for Agri-Environmental Research, University of Reading (UOR), Department of Community Ecology, Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), Jagiellonian University, Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), Institute of Environmental Sciences, Uniwersytet Jagielloński w Krakowie = Jagiellonian University (UJ), National and Kapodistrian University of Athens (NKUA), University of Leeds, Department of Ecology, and Swedish University of Agricultural Sciences (SLU)
- Subjects
0106 biological sciences ,Mediterranean climate ,biodiversity hotspot ,[SDV]Life Sciences [q-bio] ,HYMENOPTERA ,APOIDEA ,Hymenoptera ,Biology ,phrygana ,complex mixtures ,010603 evolutionary biology ,01 natural sciences ,MEDITERRANEAN SCRUB ,OLIVE GROVES ,PHRYGANA ,SAMPLING METHODS ,ABUNDANCE-BASED COVERAGE ESTIMATOR ,subunit-based rarefaction curves ,transect walks ,TRANSECT WALKS ,Transect ,OLEA EUROPEA ,Ecology, Evolution, Behavior and Systematics ,2. Zero hunger ,abundance-based coverage estimator (ACE) ,BIODIVERSITY HOTSPOT ,Ecology ,fungi ,Sampling (statistics) ,15. Life on land ,biology.organism_classification ,pan traps ,Mediterranean scrub ,Biodiversity hotspot ,Apoidea ,sampling methods ,010602 entomology ,Habitat ,PAN TRAPS ,olive groves ,OLIVIER ,Species richness ,SUB-UNIT RAREFACTION CURVES - Abstract
Electronic supplementary material: The online version of this article (doi:10.1007/s11284-011-0852-1) contains supplementary material, which is available to authorized users; International audience; The decline of bees has raised concerns regarding their conservation and the maintenance of ecosystem services they provide to bee-pollinated wild flowers and crops. Although the Mediterranean region is a hotspot for bee species richness, their status remains poorly studied. There is an urgent need for cost-effective, reliable, and unbiased sampling methods that give good bee species richness estimates. This study aims: (a) to assess bee species richness in two common Mediterranean habitat types: semi-natural scrub (phrygana) and managed olive groves; (b) to compare species richness in those systems to that of other biogeographic regions, and (c) to assess whether six different sampling methods (pan traps, variable and standardized transect walks, observation plots and trap nests), previously tested in other European biogeographic regions, are suitable in Mediterranean communities. Eight study sites, four per habitat type, were selected on the island of Lesvos, Greece. The species richness observed was high compared to other habitat types worldwide for which comparable data exist. Pan traps collected the highest proportion of the total bee species richness across all methods at the scale of a study site. Variable and standardized transect walks detected the highest total richness over all eight study sites. Trap nests and observation plots detected only a limited fraction of the bee species richness. To assess the total bee species richness in bee diversity hotspots, such as the studied habitats, we suggest a combination of transect walks conducted by trained bee collectors and pan trap sampling
- Published
- 2011
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3. Measuring bee diversity in different European habitats and biogeographical regions
- Author
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Hajnalka Szentgyörgyi, Gabriel Carré, Nicolas Morison, Michal Woyciechowski, Thomas Tscheulin, William E. Kunin, Catrin Westphal, Stuart P. M. Roberts, Josef Settele, Ellen Lamborn, Simon G. Potts, Ingolf Steffan-Dewenter, Jacobus C. Biesmeijer, Riccardo Bommarco, Theodora Petanidou, Bernard E. Vaissière, University of Bayreuth, Department of Ecology, Swedish University of Agricultural Sciences (SLU), Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), University of the Aegean, University of Reading (UOR), Institute of Environmental Sciences, Uniwersytet Jagielloński w Krakowie = Jagiellonian University (UJ), Institute of Integrative and Comparative Biology, University of Leeds, Department of Community Ecology, and Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ)
- Subjects
0106 biological sciences ,Range (biology) ,SAMPLING METHOD ,[SDV]Life Sciences [q-bio] ,HYMENOPTERA ,APIFORMES ,POLLINISATOR ,WILD BEE ,SAMPLING ASSESSMENT ,PLANT-POLLINATOR RELATIONSHIP ,Biology ,010603 evolutionary biology ,01 natural sciences ,SOCIAL INSECT ,HONEYBEE ,ABUNDANCE-BASED COVERAGE ESTIMATOR ,SOLITARY BEE ,Abundance (ecology) ,RELATION PLANTE-POLLINISATEUR ,Transect ,Ecology, Evolution, Behavior and Systematics ,abeille domestique ,EVALUATION DES METHODES ,Ecology ,APIS MELLIFERA ,USEFUL INSECT ,Sampling (statistics) ,TRANSECT WALK ,15. Life on land ,010602 entomology ,PAN TRAP ,Habitat ,BIOGEOGRAPHIE ,Rarefaction (ecology) ,BIODIVERSITY ,ABUNDANCE ,Species richness ,AGROECOSYSTEM ,APIDAE ,Global biodiversity ,BIOGEOGRAPHY - Abstract
International audience; Bee pollinators are currently recorded with many different sampling methods. However, the relative performances of these methods have not been systematically evaluated and compared. In response to the strong need to record ongoing shifts in pollinator diversity and abundance, global and regional pollinator initiatives must adopt standardized sampling protocols when developing large-scale and long-term monitoring schemes. We systematically evaluated the performance of six sampling methods (observation plots, pan traps, standardized and variable transect walks, trap nests with reed internodes or paper tubes) that are commonly used across a wide range of geographical regions in Europe and in two habitat types (agricultural and seminatural). We focused on bees since they represent the most important pollinator group worldwide. Several characteristics of the methods were considered in order to evaluate their performance in assessing bee diversity: sample coverage, observed species richness, species richness estimators, collector biases (identified by subunit-based rarefaction curves), species composition of the samples, and the indication of overall bee species richness (estimated from combined total samples). The most efficient method in all geographical regions, in both the agricultural and seminatural habitats, was the pan trap method. It had the highest sample coverage, collected the highest number of species, showed negligible collector bias, detected similar species as the transect methods, and was the best indicator of overall bee species richness. The transect methods were also relatively efficient, but they had a significant collector bias. The observation plots showed poor performance. As trap nests are restricted to cavity-nesting bee species, they had a naturally low sample coverage. However, both trap nest types detected additional species that were not recorded by any of the other methods. For large-scale and long-term monitoring schemes with surveyors with different experience levels, we recommend pan traps as the most efficient, unbiased, and cost-effective method for sampling bee diversity. Trap nests with reed internodes could be used as a complementary sampling method to maximize the numbers of collected species. Transect walks are the principal method for detailed studies focusing on plant–pollinator associations. Moreover, they can be used in monitoring schemes after training the surveyors to standardize their collection skills.
- Published
- 2008
- Full Text
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