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Decreasing Abundance, Increasing Diversity and Changing Structure of the Wild Bee Community (Hymenoptera: Anthophila) along an Urbanization Gradient
Background Wild bees are important pollinators that have declined in diversity and abundance during the last decades. Habitat destruction and fragmentation associated with urbanization are reportedExpand
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Pollen hosts of western palaearctic bees of the genus Colletes (Hymenoptera: Colletidae) : the Asteraceae paradox
To assess the pollen hosts of 60 western palaearctic bee species of the genus Colletes (Colletidae), we microscopically analysed 1336 pollen loads of collected females. Twenty-six species (43.3%)Expand
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Biotic diversity in the Southern African winter-rainfall region
The outstanding diversity of biota of the Cape region is expressed differently in major groups: flowering plants and bees show high species richness in few clades combined with high endemism andExpand
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From research to action: Enhancing crop yield through wild pollinators
Recent evidence highlights the value of wild-insect species richness and abundance for crop pollination worldwide. Yet, deliberate physical importation of single species (eg European honey bees) intoExpand
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Economic gain, stability of pollination and bee diversity decrease from southern to northern Europe
Abstract Bees are in decline potentially leading to reduced pollination and hence production of insect-pollinated crops in many countries. It is however still unclear whether the consequences ofExpand
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Conservation ecology of bees: populations, species and communities
Recent concerns regarding the decline of plant and pollinator species, and the impact on ecosystem functioning, has focused attention on the local and global threats to bee diversity. As evidence forExpand
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Patterns of diversity, endemism and distribution of bees (Insecta: Hymenoptera: Anthophila) in southern Africa
Abstract For southern Africa, patterns of bee diversity and endemism were studied with a special focus on South Africa and the Cape Floral Kingdom. Based on distribution records of 645 speciesExpand
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Molecular, biogeographical and phenological evidence for the existence of three western European sibling species in the Colletes succinctus group (Hymenoptera: Apidae)
Abstract This paper examines a cryptic species complex comprising three nominal bee species: Colletes halophilus, Colletes hederae, and Colletes succinctus. Multiple individuals of each wereExpand
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The taxonomist - an endangered race. A practical proposal for its survival
BackgroundTaxonomy or biological systematics is the basic scientific discipline of biology, postulating hypotheses of identity and relationships, on which all other natural sciences dealing withExpand
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