Nav: Home

Small farms benefit significantly from a few extra pollinators

January 21, 2016

Higher numbers of pollinators can significantly increase crop productivity of small-sized farms, while large farms experience a similar yield benefit only if increases in pollinator density are accompanied by diversity, a new study finds. More than two billion people are reliant on small-scale agriculture in developing nations, and while much evidence demonstrates that pollinators can beneficially affect crop yield, how these helpful critters affect small-scale farms compared to larger farms is mostly unknown. To gain more insights, Lucas Garibaldi et al. analyzed 344 fields of small and large holdings in Africa, Asia, and Latin America, recording the number of pollinators (density), their biodiversity, and the yield of each crop over a five-year period. For small holdings less than two hectares, their analysis found that yield gaps -- the difference between crops that yielded the most produce compared to those that yielded the least -- could be closed by 24% through higher pollinator density; the authors note that the remaining 76% of the yield gap may be partially closed by technologies that optimize other agricultural factors, such as nutrients and water. In contrast, for larger holdings, a similar yield benefit from pollinator density only occurred if accompanied by high pollinator diversity. The authors suggest that large crops may benefit less from pollinator density because these are more likely to be pollinated by flower visitors with longer foraging ranges, which are usually generalist species, such as honey bees. Although pollinator dynamics are being increasingly threatened in agroecosystems because of declining floral abundance and diversity, the authors note that there are opportunities to reverse the trend by a number of different means, including planting flower strips, more targeted use of pesticides, and restoring natural areas adjacent to crops.
-end-


American Association for the Advancement of Science

Related Diversity Articles:

Bursts of diversity in the gut microbiota
The diversity of bacteria in the human gut is an important biomarker of health, influences multiple diseases, such as obesity and inflammatory bowel diseases and affects various treatments.
Underestimated chemical diversity
An international team of researchers has conducted a global review of all registered industrial chemicals: some 350,000 different substances are produced and traded around the world -- well in excess of the 100,000 reached in previous estimates.
New world map of fish genetic diversity
An international research team from ETH Zurich and French universities has studied genetic diversity among fish around the world for the first time.
Biological diversity as a factor of production
Can the biodiversity of ecosystems be considered a factor of production?
Fungal diversity and its relationship to the future of forests
Stanford researchers predict that climate change will reduce the diversity of symbiotic fungi that help trees grow.
Brain diseases with molecular diversity
Parkinson's and multisystem atrophy (MSA) - both of them neurodegenerative diseases - are associated with the accumulation of alpha-synuclein proteins in the brain.
United in musical diversity
Is music really a 'universal language'? Two articles in the most recent issue of Science support the idea that music all around the globe shares important commonalities, despite many differences.
Genetic diversity facilitates cancer therapy
Cancer patients with more different HLA genes respond better to treatment.
A new ranavirus threatens US amphibian diversity
In a study published in the Oct. 15 issue of Ecological Modelling, a team of University of Tennessee researchers along with a colleague from the University of Florida model how a chimeric Frog virus 3 (FV3)-like ranavirus, also known as RCV-Z2, can spread rapidly throughout a population of North American wood frog (Lithobates sylvaticus) tadpoles.
New way to target cancer's diversity and evolution
Scientists have revealed close-up details of a vital molecule involved in the mix and match of genetic information within cells -- opening up the potential to target proteins of this family to combat cancer's diversity and evolution.
More Diversity News and Diversity Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: Reinvention
Change is hard, but it's also an opportunity to discover and reimagine what you thought you knew. From our economy, to music, to even ourselves–this hour TED speakers explore the power of reinvention. Guests include OK Go lead singer Damian Kulash Jr., former college gymnastics coach Valorie Kondos Field, Stockton Mayor Michael Tubbs, and entrepreneur Nick Hanauer.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Dispatch 6: Strange Times
Covid has disrupted the most basic routines of our days and nights. But in the middle of a conversation about how to fight the virus, we find a place impervious to the stalled plans and frenetic demands of the outside world. It's a very different kind of front line, where urgent work means moving slow, and time is marked out in tiny pre-planned steps. Then, on a walk through the woods, we consider how the tempo of our lives affects our minds and discover how the beats of biology shape our bodies. This episode was produced with help from Molly Webster and Tracie Hunte. Support Radiolab today at Radiolab.org/donate.