Promoting borders between crops is vital to pollinator survival

Two CREAF researchers have taken part in the study, which shows that small, irregularly shaped fields on farmland boost the number and abundance of species. This is because pollinators use crop borders as highways or corridors for movement and protection. The trend of ever larger crop fields is endangering insect pollinator populations and their ability to pollinate crops

Agricultural landscape with various crops and borders, in Monfri, in theItalian region of Piemonte. Source: Pixabay (CC0)

The body of scientific evidence that monoculture is the scourge of pollinators continues to grow. This week, Proceedings of the Royal Society B has published a study led by the University of Göttingen (Germany) which shows that insect pollinator numbers and biodiversity surge when farmland is laid out as small, irregularly shaped crop fields. This happens because arranging land in such a way means more borders between crops, and those borders are vital to maintaining healthy populations of insect pollinators

Insect pollinator numbers and biodiversity surge when farmland is laid out as small, irregularly shaped crop fields.

A border of grasses and ruderals which enable insects to thrive always forms naturally between two crop fields. CREAF researcher Jordi Bosch explains that he and his colleagues from CTFC have found that such borders act as highways for insects. Having more borders results in better connected fields, improved pollen transfer, greater pollinator mobility, and better conditions for such insects to reproduce and find food. The researchers actually observed that rises in pollinator populations stemming from an increased number of borders boosted seed quantity and productivity in every crop field they examined. The study was carried out in 229 different farmland areas in France, Germany, the UK and Catalonia.

•Una papallona amb l’espiritrompa desplegada xuclant el nèctar de la flor. Font: Pixabay (CC0)
A butterfly with the proboscide displayed sucking the nectar of the flower. Source: Pixabay (CC0)

“One step at a time, science is making it clear that we need to halt the current trend of constantly increasing the size of crop fields”, says Lluís Brotons, a CSIC researcher based at CREAF and one of the study’s co-authors. He explains that monoculture farming not only involves greater use of chemical products but also turns land into a green desert with no borders to act as the corridors insects require to survive and carry out pollination. Unless the trend in question is reversed, he concludes, “we won’t be able to restore insect populations or recover the ecosystem services they provide, and we’ll be putting agricultural productivity and the proper functioning of ecosystems in general at risk”.



Hass A.L., Bosch J., Brotons L., et al. (2018). Landscape configurational heterogeneity by small-scale agriculture, not crop diversity, maintains pollinators and plant reproduction in western Europe. Proceedings of the Royal Society B, Volume 285, Issue 1872. DOI: 10.1098/rspb.2017.2242

Related articles

Solitary bee (Osmia sp.) in a “bee hotel”. Public domain image.
News @en
Veronica Couto Antelo

Climate change is making bees more sensitive to pesticides

In recent decades there have been significant declines in bees populations, which are linked to factors such as climate change, changes in land use, the arrival of new natural enemies and the use of pesticides.


Bees and flowers: made for each other

When someone is indecisive, or goes after someone to get something, they are said to do the butterfly, or to go from flower to flower… These are popular sayings that perhaps nowadays people do not keep in mind, especially those who do not go out in the countryside, or who wear the green glasses of naturalism. Today, on World Bee Day, we want you to put on these glasses and see how the insects that visit our flowers behave.

Participants group at the IPBES 'Framework for Nature's Futures' meeting, South Africa. Photo IPBES.
News @en
Angela Justamante

CREAF participates in an IPBES meeting to discuss future scenarios for nature

CREAF researcher Lluís Brotons participated in a meeting organised by the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) in South Africa. The conference focused on how to project, evaluate and protect the future of nature concerning three axes: nature as culture, as a service to society and as a value in itself.

Credit: Kalen Emsley, unsplash.
News @en
Anna Ramon

CREAF attends the Biodiversity Conference in Montreal, COP15

It will do so thanks to a CREAF delegation teamed up with Alícia Pérez-Porro, CREAF scientific coordinator, Lluís Brotons, CSIC researcher at CREAF, and CREAF researchers Sergi Herrando and Daniel Villero, all of them will be in Canada from 9 to 16 December.

Angela Justamante

What is IPBES?

iodiversity loss is undeniable, but at what rate? Why? How does it affect us? And what can we do? The Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) has been answering these questions since its creation in 2012.

We've changed the wordpress version If you prefer to read this news in Spanish or Catalan from 2020 to 2012, go to the front page of the blog, change the language with the selector in the upper menu and look for the news in the magnifying glass bar.

Subscribe to our Newsletter to get the lastest CREAF news.