Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1111/oik.10495
Lizenz creative commons licence
Titel (primär) High rates of nectar depletion in summer grasslands indicate competitive conditions for pollinators
Autor Sponsler, D.; Dominik, C. ORCID logo ; Biegerl, C.; Honchar, H.; Schweiger, O.; Steffan-Dewenter, I.
Quelle Oikos
Erscheinungsjahr 2024
Department BZF; NSF
Band/Volume 2024
Heft 9
Seite von e10495
Sprache englisch
Topic T5 Future Landscapes
Daten-/Softwarelinks https://doi.org/10.5061/dryad.sf7m0cgf7
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Keywords coexistence; floral resources; foraging; honey bees; trophic ecology
Abstract Competition among pollinators for floral resources is a phenomenon of both basic and applied importance. While competition is difficult to measure directly under field conditions, it can be inferred indirectly through the measurement of floral resource depletion. In this study, we conducted a pollinator exclusion experiment to calculate nectar depletion rates in summer across 16 grassland sites in the German regions of Franconia and Saxony-Anhalt. Overall depletion rates were estimated at 95% in Franconia and 79% in Saxony-Anhalt, indicating strong nectar limitation and likely competition among pollinators for nectar. Despite being ubiquitous in our study regions, honey bees were scarce at our sites at the time of nectar sampling. This demonstrates that wild pollinators alone are capable of massive nectar depletion, and the addition of managed honey bees to wild pollinator communities may intensify already competitive conditions. Nevertheless, the manifest diversity of the pollinator communities at our sites indicates that other factors, such as non-trophic constraints or temporal variation in nectar limitation, can mitigate competitive exclusion despite immediate conditions of acute nectar scarcity.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29156
Sponsler, D., Dominik, C., Biegerl, C., Honchar, H., Schweiger, O., Steffan-Dewenter, I. (2024):
High rates of nectar depletion in summer grasslands indicate competitive conditions for pollinators
Oikos 2024 (9), e10495 10.1111/oik.10495