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  1. AU="Steffan‐Dewenter, Ingolf"
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  1. Buch ; Online ; Dissertation / Habilitation: Honey bee foraging in agricultural landscapes

    Danner, Nadja / Steffan-Dewenter, Ingolf / Scheiner, Ricarda

    2016  

    Titelvarianten Sammelverhalten von Honigbienen in der Agrarlandschaft
    Verfasserangabe Nadja Danner ; Gutachter: Ingolf Steffan-Dewenter, Ricarda Scheiner
    Schlagwörter foraging distances ; Sammeldistanzen ; semi-natural habitat ; halbnatürliche Habitate ; next-generation sequencing ; pollen ; Pollen ; Next-Generation Sequenzierung ; Landschaftsstruktur ; landscape structure
    Thema/Rubrik (Code) 630 ; 590
    Sprache Englisch
    Umfang Online-Ressource
    Verlag Universität Würzburg
    Erscheinungsort Würzburg
    Erscheinungsland Deutschland
    Dokumenttyp Buch ; Online ; Dissertation / Habilitation
    Dissertation / Habilitation Dissertation, Würzburg, Universität Würzburg, 2016
    HBZ-ID HT019702025
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  2. Buch: Expert Forum Bees and Agriculture

    Ohe, Werner von der / Beer, Holger / Einspanier, Ralf / Pistorius, Jens / Schäfer, Bernhard C. / Steffan-Dewenter, Ingolf

    researching synergies, developing solutions : research strategy of the German Agricultural Research Alliance

    2020  

    Titelübersetzung Fachforum Bienen und Landwirtschaft
    Verfasserangabe Concept, content and editing, Steering group of the Expert Forum Bees and Agriculture: Prof. Dr. Werner von der Ohe, Dr. Holger Beer, Prof. Dr. Dr. Ralf Einspanier, Dr. Jens Pistorius, Prof. Dr. Bernhard Carl Schäfer, Prof. Dr. Ingolf Steffan-Dewenter
    Sprache Deutsch
    Umfang 44 Seiten
    Verlag German Agricultural Research Alliance (DAFA)
    Erscheinungsort Braunschweig
    Erscheinungsland Deutschland
    Dokumenttyp Buch
    HBZ-ID HT020465678
    ISBN 978-3-86576-212-2 ; 3-86576-212-3
    Datenquelle Katalog ZB MED Ernährung, Umwelt, Agrar

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  3. Buch ; Online: Expert Forum Bees and Agriculture

    Ohe, Werner von der / Beer, Holger / Einspanier, Ralf / Pistorius, Jens / Schäfer, Bernhard C. / Steffan-Dewenter, Ingolf

    researching synergies, developing solutions : research strategy of the German Agricultural Research Alliance

    2020  

    Titelübersetzung Fachforum Bienen und Landwirtschaft
    Körperschaft Deutsche Agrarforschungsallianz / Fachforum Bienen und Landwirtschaft
    Verfasserangabe Concept, content and editing, Steering group of the Expert Forum Bees and Agriculture: Prof. Dr. Werner von der Ohe, Dr. Holger Beer, Prof. Dr. Dr. Ralf Einspanier, Dr. Jens Pistorius, Prof. Dr. Bernhard Carl Schäfer, Prof. Dr. Ingolf Steffan-Dewenter
    Sprache Deutsch
    Umfang 1 Online-Ressource (44 Seiten)
    Verlag German Agricultural Research Alliance (DAFA)
    Erscheinungsort Braunschweig
    Erscheinungsland Deutschland
    Dokumenttyp Buch ; Online
    Anmerkung Open Access
    HBZ-ID HT020459616
    ISBN 9783865762122 ; 3865762123
    DOI 10.3220/DAFA1587459054000
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  4. Buch: Fachforum Bienen und Landwirtschaft

    Ohe, Werner von der / Beer, Holger / Einspanier, Ralf / Pistorius, Jens / Schäfer, Bernhard C. / Steffan-Dewenter, Ingolf

    Synergien erforschen, Lösungen entwickeln : Forschungsstrategie der Deutschen Agrarforschungsallianz

    2020  

    Verfasserangabe Redaktion, Inhalt, Konzept, Mitglieder der Steuerungsgruppe: Prof. Dr. Werner von der Ohe, Dr. Holger Beer, Prof. Dr. Dr. Ralf Einspanier, Dr. Jens Pistorius, Prof. Dr. Bernhard Carl Schäfer, Prof. Dr. Ingolf Steffan-Dewenter
    Sprache Deutsch
    Umfang 44 Seiten, Illustrationen
    Verlag Deutsche Agrarforschungsallianz (DAFA)
    Erscheinungsort Braunschweig
    Erscheinungsland Deutschland
    Dokumenttyp Buch
    HBZ-ID HT020465686
    ISBN 978-3-86576-206-1 ; 3-86576-206-9
    Datenquelle Katalog ZB MED Ernährung, Umwelt, Agrar

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  5. Buch ; Online: Fachforum Bienen und Landwirtschaft

    Ohe, Werner von der / Beer, Holger / Einspanier, Ralf / Pistorius, Jens / Schäfer, Bernhard C. / Steffan-Dewenter, Ingolf

    Synergien erforschen, Lösungen entwickeln : Forschungsstrategie der Deutschen Agrarforschungsallianz

    2020  

    Körperschaft Deutsche Agrarforschungsallianz / Fachforum Bienen und Landwirtschaft
    Verfasserangabe Redaktion, Inhalt, Konzept, Mitglieder der Steuerungsgruppe: Prof. Dr. Werner von der Ohe, Dr. Holger Beer, Prof. Dr. Dr. Ralf Einspanier, Dr. Jens Pistorius, Prof. Dr. Bernhard Carl Schäfer, Prof. Dr. Ingolf Steffan-Dewenter
    Sprache Deutsch
    Umfang 1 Online-Ressource
    Verlag Deutsche Agrarforschungsallianz (DAFA)
    Erscheinungsort Braunschweig
    Erscheinungsland Deutschland
    Dokumenttyp Buch ; Online
    Anmerkung Open Access
    HBZ-ID HT020459542
    ISBN 978-3-86576-206-1 ; 3-86576-206-9
    DOI 10.3220/DAFA1582194383000
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  6. Artikel ; Online: Pollinator competition and the structure of floral resources

    Sponsler, Douglas / Iverson, Aaron / Steffan‐Dewenter, Ingolf

    Ecography. 2023 Sept., v. 2023, no. 9 p.e06651-

    2023  

    Abstract: The mutualism between plants and pollinators is built upon the trophic ecology of flowers and florivores. Yet the ecology of flowers‐as‐food is left implicit in most studies of plant–pollinator ecology, and it has been largely neglected in mainstream ... ...

    Abstract The mutualism between plants and pollinators is built upon the trophic ecology of flowers and florivores. Yet the ecology of flowers‐as‐food is left implicit in most studies of plant–pollinator ecology, and it has been largely neglected in mainstream trophic ecology. This deficit is especially evident in an emerging issue of basic and applied significance: competition between pollinators for floral resources. In this synthesis, we start by exploring the notion of floral resource limitation upon which most studies concerning competition between pollinators are tacitly predicated. Both theoretical and empirical lines of evidence indicate that floral resource limitation must be understood as a complex ecological contingency; the question is not simply whether but when, where and in what regions of floral trait space resources are limiting. Based on this premise, we propose a framework for understanding floral resource availability in terms of temporal, spatial and functional structure. While this framework is conceptually intuitive, it is empirically and analytically demanding. We review existing methods for measuring and summarizing the multi‐dimensional structure of floral resources, highlight their strengths and weaknesses, and identify opportunities for future methods development. We then discuss the causal relationships linking floral resource structure to species coexistence, plant–pollinator community dynamics, and exogenous drivers like climate, land use, and episodic disturbances. In its role as both cause and effect, floral resource structure mediates the relationship between behavioral ecology, landscape ecology, and coexistence theory with respect to flowers and florivores. Establishing floral resource structure as an object of study and application will both shed light on basic questions of coexistence and guide management decisions concerning contentious issues such as the compatibility of apiculture with wild pollinator conservation and the appropriate use of floral enhancements in agri‐environment schemes.
    Schlagwörter apiculture ; climate ; floral characteristics ; land use ; landscape ecology ; mutualism ; pollinators
    Sprache Englisch
    Erscheinungsverlauf 2023-09
    Erscheinungsort Blackwell Publishing Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 1112659-0
    ISSN 0906-7590
    ISSN 0906-7590
    DOI 10.1111/ecog.06651
    Datenquelle NAL Katalog (AGRICOLA)

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  7. Artikel ; Online: Foraging distances, habitat preferences and seasonal colony performance of honeybees in Central European forest landscapes

    Rutschmann, Benjamin / Kohl, Patrick L. / Steffan‐Dewenter, Ingolf

    Journal of Applied Ecology. 2023 June, v. 60, no. 6 p.1056-1066

    2023  

    Abstract: Unmanaged forest is considered as native habitat of the Western honeybee Apis mellifera and is assumed to provide important pollen and nectar sources. However, resource supply might be spatially and temporally restricted in managed forests and landscape‐ ... ...

    Abstract Unmanaged forest is considered as native habitat of the Western honeybee Apis mellifera and is assumed to provide important pollen and nectar sources. However, resource supply might be spatially and temporally restricted in managed forests and landscape‐scale studies in European forest regions are currently lacking. Capitalizing on a unique communication behaviour, the waggle dance, we investigated honeybee foraging in a deciduous forest region in southern Germany. We analysed 2022 waggle dances performed by bees of 12 colonies placed in the centre of landscapes with varying degree of forest cover (50%–99% at a 2‐km radius) from March to August 2019, thereby identifying foraging distances and habitat preferences over almost an entire foraging season. By connecting dance information with colony weight recordings, we assessed the role of landscape composition and the contribution of different habitat types to colony weight gain. Foraging distances generally increased with the amount of forest in the surrounding landscape pointing to inferior food resources in the forest. Yet, this effect strongly depended on the season and was more pronounced for pollen than for nectar foraging. Even though colonies in forest‐dominated landscapes had to fly further, colony weight was not significantly affected by forest cover. Compared to expectations based on the proportions of different habitats, colonies foraged more frequently in grassland and cropland than in deciduous and coniferous forests, with late summer being an especially difficult period for pollen foraging in forests. During a phase of colony weight gain in early summer, the use of forests for nectar/honeydew foraging was close to the expectation, highlighting forests as an important complementary source of carbohydrates during short periods of the year. Policy implication. The ecological and economic value of managed forest as habitat for honeybees could be significantly increased by the continuous provision of floral resources, especially for pollen foraging. Therefore, we recommend diversifying forest stands with insect‐pollinated trees, permitting secondary successions in forest gaps, and at larger scales, creating forest landscapes with high habitat diversity. This will not only help native, wild‐living honeybees and beekeepers' colonies residing in forest areas but will also foster social bees in general.
    Schlagwörter Apis mellifera ; applied ecology ; bee dances ; cropland ; deciduous forests ; economic valuation ; grasslands ; habitats ; honey bees ; honeydew ; insect pollination ; issues and policy ; landscapes ; nectar ; pollen ; summer ; weight gain ; Germany
    Sprache Englisch
    Erscheinungsverlauf 2023-06
    Umfang p. 1056-1066.
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 410405-5
    ISSN 1365-2664 ; 0021-8901
    ISSN (online) 1365-2664
    ISSN 0021-8901
    DOI 10.1111/1365-2664.14389
    Datenquelle NAL Katalog (AGRICOLA)

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  8. Artikel: Special profile: Pollination and pollinators

    Steffan-Dewenter, Ingolf

    Journal of applied ecology Vol. 45 , No. 3, S. [737] - 820 : Ill., graph. Darst., Kt.

    2008  Band 45, Heft 3

    Titelvarianten Pollination and pollinators
    Verfasserangabe [guest ed.: Ingolf Steffan-Dewenter ...]
    Überordnung The journal of applied ecology
    Sprache Englisch
    Erscheinungsort Oxford [u.a.]
    Erscheinungsland Vereinigtes Königreich
    Dokumenttyp Artikel
    HBZ-ID HT015557369
    Datenquelle Katalog ZB MED Ernährung, Umwelt, Agrar

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  9. Artikel: Nectar robbing rather than pollinator availability constrains reproduction of a bee‐flowered plant at high elevations

    Kohl, Patrick L. / Steffan‐Dewenter, Ingolf

    Ecosphere. 2022 June, v. 13, no. 6

    2022  

    Abstract: Abiotic factors are generally assumed to determine whether species can exist at the extreme ends of environmental gradients, for example, at high elevations, whereas the role of biotic interactions is less clear. On temperate mountains, insect‐pollinated ...

    Abstract Abiotic factors are generally assumed to determine whether species can exist at the extreme ends of environmental gradients, for example, at high elevations, whereas the role of biotic interactions is less clear. On temperate mountains, insect‐pollinated plant species with bilaterally symmetrical flowers exhibit a parallel elevational decline in species richness and abundance with bees. This suggests that the lack of mutualistic interaction partners sets the elevational range limits of plants via a reduction in reproductive success. We used the bee‐pollinated mountain plant Clinopodium alpinum (Lamiaceae), which blooms along a continuous 1000‐m elevational gradient and has bilaterally symmetrical flowers, as a model to test the predicted parallel elevational decline in flower visitation and seed production. Although the community of flower visitors changed with elevation, the flower visitation rate by the most frequent visitors, bumble bees (33.8% of legitimate visits), and the overall rate of flower visitation by potential pollinators did not vary significantly with elevation. However, we discovered that nectar robbing by bumble bees and nectar theft by ants, two interactions with potentially negative effects on flowers, sharply increased with elevation. Seed set depended on pollinators across elevations and followed a weak hump‐shaped pattern, peaking at mid‐elevations and decreasing by about 20% toward both elevational range edges. Considering the mid‐ and high elevations, elevational variation in seed production could not be explained by legitimate bee visitation rates but was inversely correlated with the frequency of nectar robbing. Our observations challenge the hypothesis that a decrease in the availability of pollinators limits seed production of bee‐flowered plants at high elevations but suggest that an increase in negative interactions (nectar robbing and larceny) constrains reproductive success.
    Schlagwörter Clinopodium ; bee pollination ; bees ; decline ; flowers ; nectar ; pollinators ; reproductive success ; seed set ; species diversity
    Sprache Englisch
    Erscheinungsverlauf 2022-06
    Erscheinungsort John Wiley & Sons, Inc.
    Dokumenttyp Artikel
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 2572257-8
    ISSN 2150-8925
    ISSN 2150-8925
    DOI 10.1002/ecs2.4077
    Datenquelle NAL Katalog (AGRICOLA)

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  10. Artikel ; Online: Reproduction of Varroa destructor depends on well-timed host cell recapping and seasonal patterns.

    Gabel, Martin / Scheiner, Ricarda / Steffan-Dewenter, Ingolf / Büchler, Ralph

    Scientific reports

    2023  Band 13, Heft 1, Seite(n) 22484

    Abstract: Resistance traits of honeybees (Apis mellifera) against their major parasite Varroa destructor have fascinated scientists and breeders for long. Nevertheless, the mechanisms underlying resistance are still largely unknown. The same applies to possible ... ...

    Abstract Resistance traits of honeybees (Apis mellifera) against their major parasite Varroa destructor have fascinated scientists and breeders for long. Nevertheless, the mechanisms underlying resistance are still largely unknown. The same applies to possible interactions between host behaviours, mite reproduction and seasonal differences. Two resistance traits, reproductive failure of mites and recapping of brood cells, are of particular interest. High rates of recapping at the colony level were found to correspond with low reproductive success of mites. However, the direct effect of recapping on mite reproduction is still controversial and both traits seem to be very variable in their expression. Thus, a deeper knowledge of both, the effect of recapping on mite reproduction and the seasonal differences in the expression of these traits is urgently needed. To shed light on this host-parasite interaction, we investigated recapping and mite reproduction in full-grown colonies naturally infested with V. destructor. Measurements were repeated five times per year over the course of 3 years. The reproductive success of mites as well as the recapping frequency clearly followed seasonal patterns. Thereby, reproductive failure of mites at the cell level was constantly increased in case of recapping. Interestingly, this did not apply to the occurrence of infertile mites. In line with this, recapping activity in fertile cells was most frequent in brood ages in which mite offspring would be expected. Our results suggest that mite offspring is the main target of recapping. This, in turn, leads to a significantly reduced reproductive success of the parasite.
    Mesh-Begriff(e) Bees ; Animals ; Varroidae ; Seasons ; Reproduction ; Fertility ; Host-Parasite Interactions
    Sprache Englisch
    Erscheinungsdatum 2023-12-18
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-49688-9
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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