Abstract
Farm habitat enrichment is crucial for sustainable production of pollinator-dependent crops. Correct choice of crop and non-crop plant species in habitat management support resilient pollinator fauna and effective pollination service delivery. We identify key network metrices to recognize suitable crop and non-crop plant species for farm habitat enrichment. We also highlight the importance of seasonal variation of the key plant and pollinator species that will crucially inform farm management. Crop species played a key role in maintaining plant–pollinator network integrity. In contrast to the conventional practice of focussing on non-crop plants for pollination service restoration, we find crop plants across seasons hold a key role in maintaining healthy plant–pollinator networks. Our study highlights the importance of non-bee pollinators especially, flies and butterflies in sustaining healthy plant–pollinator network. Bees were important as connector species and controlled other species in the network. Only 16.67% bees and 33.33% of plant species acted as connector species. Our study also shows that the identity of connector species in a plant–pollinator network can change drastically across seasons.
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Acknowledgements
We gratefully acknowledge University of Calcutta, India, and the Game and Wildlife Conservation Trust, UK for providing infrastructural support. Abhijit Majumdar, Litan Deb, and Sampad Saha provided field assistance.
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This study was funded by a DEFRA, Darwin Initiative research Grant (2012–2015). CSIR, Govt. of India, provided fellowships to Pushan Chakraborti.
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PB and BS conceived the idea and developed methodologies; PC conducted fieldwork; SC performed statistical analysis and wrote the manuscript; PB and BS contributed critically to the draft.
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Communicated by Katherine L. Gross.
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Chakraborty, P., Chatterjee, S., Smith, B.M. et al. Seasonal dynamics of plant pollinator networks in agricultural landscapes: how important is connector species identity in the network?. Oecologia 196, 825–837 (2021). https://doi.org/10.1007/s00442-021-04975-y
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DOI: https://doi.org/10.1007/s00442-021-04975-y