Journal ArticleDOI
Complex Responses Within A Desert Bee Guild (Hymenoptera: Apiformes) To Urban Habitat Fragmentation
TLDR
Overall, bee response to urban habitat fragmentation was best predicted by ecological traits associated with nesting and dietary breadth, had species been treated as individual units in the analyses, or pooled together into one analysis, these response patterns may not have been apparent.Abstract:
Urbanization within the Tucson Basin of Arizona during the past 50+ years has fragmented the original desert scrub into patches of different sizes and ages. These remnant patches and the surrounding desert are dominated by Larrea tridentata (creosote bush), a long-lived shrub whose flowers are visited by > 120 native bee species across its range. Twenty-one of these bee species restrict their pollen foraging to L. tridentata. To evaluate the response of this bee fauna to fragmentation, we compared species incidence and abundance patterns for the bee guild visiting L. tridentata at 59 habitat fragments of known size (0.002-5 ha) and age (up to 70 years), and in adjacent desert. The 62 bee species caught during this study responded to fragmentation heterogeneously and not in direct relation to their abundance or incidence in undisturbed desert. Few species found outside the city were entirely absent from urban fragments. Species of ground-nesting L. tridentata specialists were underrepresented in smaller fragments and less abundant in the smaller and older fragments. In contrast, cavity-nesting bees (including one L. tridentata specialist) were overrepresented in the habitat fragments, probably due to enhanced nesting opportunities available in the urban matrix. Small-bodied bee species were no more likely than larger bodied species to be absent from the smaller fragments. The introduced European honey bee, Apis mellifera, was a minor faunal element at > 90% of the fragments and exerted little if any influence on the response of native bee species to fragmentation. Overall, bee response to urban habitat fragmentation was best predicted by ecological traits associated with nesting and dietary breadth. Had species been treated as individual units in the analyses, or pooled together into one analysis, these response patterns may not have been apparent. Pollination interactions with this floral host are probably not adversely affected in this system because of its longevity and ability to attract diverse pollinators but will demand careful further study to understand.read more
Citations
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Journal ArticleDOI
The Theory of Island Biogeography
TL;DR: Preface to the Princeton Landmarks in Biology Edition vii Preface xi Symbols used xiii 1.
Journal ArticleDOI
Importance of pollinators in changing landscapes for world crops
Alexandra-Maria Klein,Bernard E. Vaissière,James H. Cane,Ingolf Steffan-Dewenter,Saul A. Cunningham,Claire Kremen,Teja Tscharntke +6 more
TL;DR: It is found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animalPollination, however, global production volumes give a contrasting perspective.
Journal ArticleDOI
Global pollinator declines: trends, impacts and drivers.
Simon G. Potts,Jacobus C. Biesmeijer,Claire Kremen,Peter J. Neumann,Oliver Schweiger,William E. Kunin +5 more
TL;DR: The nature and extent of reported declines, and the potential drivers of pollinator loss are described, including habitat loss and fragmentation, agrochemicals, pathogens, alien species, climate change and the interactions between them are reviewed.
Journal ArticleDOI
Pollination and other ecosystem services produced by mobile organisms: a conceptual framework for the effects of land-use change.
Claire Kremen,Neal M. Williams,Marcelo A. Aizen,Barbara Gemmill-Herren,Gretchen LeBuhn,Robert L. Minckley,Laurence Packer,Simon G. Potts,T'ai H. Roulston,Ingolf Steffan-Dewenter,Diego P. Vázquez,Rachael Winfree,Laurie Adams,Elizabeth E. Crone,Sarah S. Greenleaf,Timothy H. Keitt,Alexandra-Maria Klein,James Regetz,Taylor H. Ricketts +18 more
TL;DR: A conceptual model for exploring how one mobile-agent-based ecosystem service (MABES), pollination, is affected by land-use change, and then generalize the model to other MABES is developed.
Journal ArticleDOI
Measuring bee diversity in different european habitats and biogeographical regions
Catrin Westphal,Riccardo Bommarco,Gabriel Carré,Ellen Lamborn,Nicolas Morison,Theodora Petanidou,Simon G. Potts,Stuart P. M. Roberts,Hajnalka Szentgyörgyi,Thomas Tscheulin,Bernard E. Vaissière,Michal Woyciechowski,Jacobus C. Biesmeijer,William E. Kunin,Josef Settele,Ingolf Steffan-Dewenter +15 more
TL;DR: In this article, the authors 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.
References
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Journal ArticleDOI
The Theory of Island Biogeography
TL;DR: Preface to the Princeton Landmarks in Biology Edition vii Preface xi Symbols used xiii 1.
Book
The Theory of Island Biogeography
TL;DR: The Princeton Landmarks in Biology Edition vii Preface xi Symbols Used xiii 1. The Importance of Islands 3 2. Area and Number of Speicies 8 3. Further Explanations of the Area-Diversity Pattern 19 4. The Strategy of Colonization 68 5. Invasibility and the Variable Niche 94 6. Stepping Stones and Biotic Exchange 123 7. Evolutionary Changes Following Colonization 145 8. Prospect 181 Glossary 185 References 193 Index 201
Journal ArticleDOI
Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness
TL;DR: A series of common pitfalls in quantifying and comparing taxon richness are surveyed, including category‐subcategory ratios (species-to-genus and species-toindividual ratios) and rarefaction methods, which allow for meaningful standardization and comparison of datasets.
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The Bees of the World
TL;DR: This extensive update of his definitive reference, Charles D. Michener reveals a diverse fauna that numbers more than 17,000 species and ranges from the common honeybee to rare bees that feed on the pollen of a single type of plant.
Book
Logistic Regression Using the SAS System : Theory and Application
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