Caring for Pollinators - Bundesamt für Naturschutz

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Roubik Small bees have a big job How ‘safe’ and ‘stable’ is a protected forest? In the Americas, all protected forests, like this one in the Chagres National Park of Panama, have been invaded by exotic honey bees from Africa or Europe. The ‘big’ question is whether invasive bees are more likely to enrich or threaten such natural ecosystems. Are honey bees worth the ‘risk’? What do they normally visit? 5 extensive Neotropical pollen studies— Show AHBs use 20-55 local plant families, 38-250 species Mostly rosids (not mostly asterids), many monocots, roughly 25% local flora What do we need to consider before purposefully introducing exotic Apis, which are invasive? Their flower visitation habits are one longneglected aspect of their biology. In natural habitats, at least in the American tropics, they visit a full range of flowering plants, including many grasses, sedges, and trees, but not very many of the pretty ‘daisies’ upon which they are frequently depicted. 35
Roubik Small bees have a big job Proportional pollen use 0,5 0,4 0,3 0,2 0,1 0 Sapotaceae Malpighiaceae Centris pollen Fabaceae 36 Anacardiaceae Euphorbiaceae PRE-Apis POST-Apis How do invasive honey bees impact native bees? One long-term study utilized a natural experiment that occurred in a large biosphere reserve in Yucatan, Mexico. An abundant native bee, Centris analis, substantially shifted its floral resources to avoid competition with the honey bees, and it survived (R. Villanueva and D. W. Roubik, Why are African honey bees and not European bees invasive? Pollen diet diversity in community experiments. Apidologie 35:481-491; D. W. Roubik and R. Villanueva, Pollinators adjust to invasive honey bees, Biology Letters (in review). Unknown to many merchants, much of their produce comes from the work of pollinators- like the chile, mangoes, fruit and even chicle from the tree Manilkara, sold here in S. Mexico.
Page 1 and 2: Caring for Pollinators Safeguarding
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Page 7 and 8: L.E. NEWSTROM-LLOYD, J. COOPER, N.J
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Steffan-Dewenter Pollinator decline
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Programme: 18:15 h Opening by AXEL
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Literature CANE, J., H. (2001): Hab
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Literature HAGEN, E. VON (1994): Hu
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MICHENER, C.D. (2000): The bees of
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Literature THERY, M., STEVENS, A.-D
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Links International Pollinators Ini
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Caring for Pollinators - Bundesamt für Naturschutz

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