New Publication: Linking ponds and pollination

In some countries, including Sweden, you can get support to add a pond in arable fields, which can benefit for example nutrient retention and biodiversity. However, it is not well known whether these ponds possibly also enhance pollination services in nearby crops. We evaluated this in a study on both pollinator diversity and pollination potential near ponds compared to plots with semi-natural vegetation without ponds and plots with neither vegetation nor ponds, the controls. The result can be read in a new paper in Basic and Applied Ecology1

In cereal fields we put pots with strawberries close to either ponds with semi-natural vegetation, only semi-natural vegetation or neither of them. In each of these plots we measured diversity and abundance of pollinators, and pollination, in terms of both quantity and quality of strawberries. In summary the ponds did have an positive effect on the abundance on some pollinator groups, such as hoverflies, compared to both control and only semi-natural vegetation. Furthermore, the pond and semi-natural vegetation both had an positive effect on diversity and abundance on bees and hoverflies, as well as on the quantity and quality of nearby strawberries.

Future studies should further evaluate the effect of the pond in itself and the mechanisms of the effects. Our study showed that ponds with its associated vegetation can benefit both public interests in form of biodiversity conservation and benefited farmers in form of crop pollination potentials.

Read more here:

1. Stewart R.I., Andersson G.K.S, Brönmark C., Klatt B.K., Hansson L.A., Zülsdorff V., and Smith H.G., 2016, Ecosystem services across the aquatic–terrestrial boundary: Linking ponds to pollination, Basic and Applied Ecology, In Press

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Increased yield with ecological intensification

A new study1, from Lucas Garibaldi and co-workers, found that increased pollinator visitation makes an important contribution to closing yield-gaps worldwide.

With data from 344 field over three continent, Africa, Latin America and Asia, studied over 5 years, the authors analysed how flower visitation frequency and flower visitor diversity affected yield in 33 crop systems. They found that for fields less than 2 hectares, yield gaps could be closed by a median of 24% through higher flower-visitor density. For larger fields, such yield benefits were only present if these fields also had a high flower-visitor richness. The rest of the yield gap should be closed by a variety of techniques aiming at increasing efficiency of water and nutrient usage etc.

The study concludes that using ecological intensification to increase pollination services was most effective for small-holders. To increase pollinators in the landscape a combination of practices need to be used, as the effectiveness of each technique will be context dependent. Those can include; sowing flower strips2 and planting hedgerows, providing nesting resources, more targeted use of pesticides, and/or restoration of semi-natural and natural areas. By using pollination as a case study, the study showed that ecological intensification can benefit both biodiversity and crop yields worldwide.


1. Garibaldi LA, Carvalheiro LG, Vaissière BE, Gemmill-Herren B, Hipólito J, Freitas BM, Ngo HT, et al. 2016. Mutually beneficial pollinator diversity and crop yield outcomes in small and large farms, Science 351: 338-391.

Go to the publication page of Lucas Garibaldi to find the publication and data.

2. Annelie M. Jönsson, Johan Ekroos, Juliana Dänhardt, Georg K.S. Andersson, Ola Olsson, Henrik G. Smith, 2015, Sown flower strips in southern Sweden increase abundances of wild bees and hoverflies in the wider landscape, Biological Conservation. 184: 51-58

Categories: Agriculture, Agroecology, Research, Science, Sustainable agriculture | Tags: , , , | 1 Comment

New publication: Multiple-scale land sparing

Some of my colleagues from Lund and I just published a new paper in Frontiers in Ecology and Evolution on what we call multiple scale sparing to widen the, often heated, debate on land sharing versus land sparing1

There is an ongoing debate on whether we should devote specific areas of non-crop habitats to conservation, segregated from high-yielding farmland, “land sparing”, or implement farming practices that integrate biodiversity and promote other services than crop yield “land sharing”. In our paper we argue that the debate over the relative merits of land sparing and land sharing is confused because the spatial scales to apply the land sparing or sharing differ widely in the debate. There might not be a single correct spatial scale for segregating biodiversity protection and commodity production in multifunctional landscapes.
In the article we discuss how this way of thinking on land sparing/sharing may overcome the apparent dichotomy between land sharing and land sparing. Hopefully, it can aid in finding acceptable compromises that conserve biodiversity and landscape multifunctionality.

Read more here:

1. Ekroos J, Ödman AM, Andersson GKS, Birkhofer K, Herbertsson L, Klatt BK, Olsson O, Olsson PA, Persson AS, Prentice HC, Rundlöf M and Smith HG, 2015, Sparing Land for Biodiversity at Multiple Spatial Scales. Front. Ecol. Evol. 3:145

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New Institute of Agroecology

A while ago some researchers at the university, UNRN, among them a team from our group, have worked on an application for starting a new institute on Agroecology. It just got approved and we are pleased to now have the Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural – IRNAD

Translated it mean “Institute of Research in Natural Resources, Agroecology and Rural Development. The idea is to work with questions on how to transform agriculture to produce food, increase food security and social development in a sustainable way. This require understanding and knowledge from many different disciplines and we aim to be an inter- and transdisciplinary research institute. We are already from the start an interdisciplinary group of researchers, which will hopefully increase with time.

If you want more information you can contact me or the Director of the Institute Lucas Garibaldi.


Categories: IRNAD, Research, Science | Tags: , , , , | 1 Comment

New publication; importance of non-bees

Recently our new publication on the importance of non-bee insects for crop pollination around the world was published online at PNAS.


We found that other insects than bees also are important for the pollination of crops. Examples of these non-bee pollinators are insects such as flies, beetles, moths, butterflies, wasps and ants. Non-bee pollinators were less effective than bees per flower visit however, they provided more visits.

As these other insects responds a bit different to e.g land-use changes than bees do, they can perhaps stabilize the pollinations service under environmental change.

As it is open access you can both read the abstract and download pdf here:

Non-bee insects are important contributors to global crop pollination


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New PostDoc

In September I started a PostDoc in Bariloche, Argentina, within the agroecology group with Lucas Garibaldi as director.

My research will deal with effects of weather, honeybee hive quality and bumblebees on apple and pear pollination.

Read more under the Projects page PostDoc

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