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Home SCIENCE NEWS Technology and Engineering

Balanced diet can mitigate negative impact of pests for bumblebees

January 21, 2022
in Technology and Engineering
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Bumblebees are important pollinators because they pollinate many different plant species and are extremely resilient. They can still manage to fly at temperatures that are too cold for other pollinators. Like many other insects, they are in sharp decline. This makes it even more important to find out what bumblebees need to reproduce successfully. A team from the University of Göttingen has shown that a diverse landscape and a diverse pollen diet, which the bumblebees collect as a protein source to nourish their offspring, play a significant role in this. A more diverse diet could even mitigate negative effects of infestation with parasitic wax moth larvae. The results were published in the journal Agriculture, Ecosystems and Environment.

Bumblebee colonies

Credit: S Schweiger

Bumblebees are important pollinators because they pollinate many different plant species and are extremely resilient. They can still manage to fly at temperatures that are too cold for other pollinators. Like many other insects, they are in sharp decline. This makes it even more important to find out what bumblebees need to reproduce successfully. A team from the University of Göttingen has shown that a diverse landscape and a diverse pollen diet, which the bumblebees collect as a protein source to nourish their offspring, play a significant role in this. A more diverse diet could even mitigate negative effects of infestation with parasitic wax moth larvae. The results were published in the journal Agriculture, Ecosystems and Environment.

The researchers established bumblebee colonies in Central and Northern Germany and collected pollen from bumblebees returning to their hives in order to investigate the importance of pollen nutrition and habitat diversity in agricultural landscapes on reproduction. The influence of mass flowering monocultures with a short flower period that provides unilateral nutrition for bees, as well as landscape elements characterised by a continuous and diverse flower supply, were analysed.

“Our study shows that it is not individual habitats, such as flower-rich gardens, or semi-natural habitats (such as hedgerows or flower strips), that contribute to reproductive success for the large earth bumblebee Bombus terrestris. In fact, it is rather the diversity of habitats across the entire study landscape that is important,” says first author Sandra Schweiger, a researcher in Functional Agrobiodiversity at Göttingen University. “So a wide variety of flower-rich landscape elements must be present. In addition, a diverse pollen diet can contribute to better colony growth and more offspring, especially for young queens.” The head of the group, Professor Catrin Westphal, adds: “In addition, a balanced pollen diet reduces the negative effects of infestation of the colonies with parasitic wax moth larvae, which can severely harm the reproductive success of the bumblebees.”

Original publication: Schweiger, S.E. et al. Pollen and landscape diversity as well as wax moth depredation determine reproductive success of bumblebees in agricultural landscapes. Agriculture, Ecosystems and Environment. 2022. https://doi.org/10.1016/j.agee.2021.107788

The full article is available here until 3 February 2022: https://authors.elsevier.com/a/1eFPJcA-IgJk0

Contact:

Sandra Elena Schweiger

University of Göttingen

Faculty of Agricultural Sciences – Functional Agrobiodiversity

Grisebachstraße 6, 37077 Göttingen

Tel: +49 (0) 551 39-22312 / -33739

Email: sandra.schweiger@uni-goettingen.de

 

Professor Catrin Westphal

University of Göttingen

Faculty of Agricultural Sciences ­– Functional Agrobiodiversity

Grisebachstraße 6, 37077 Göttingen

Tel: +49 (0) 551 39-22312 / -33739

Email: cwestph@gwdg.de

 



Journal

Agriculture Ecosystems & Environment

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Pollen and landscape diversity as well as wax moth depredation determine reproductive success of bumblebees in agricultural landscapes. Agriculture, Ecosystems and Environment.

Article Publication Date

1-Mar-2022

Tags: Balancedbumblebeesdietimpactmitigatenegativepests
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