Job offersmore »
- Managing Grower - Australia
- Senior Grower - Talbotville, Ontario, Canada
- Operations Manager - Fresh Produce
- Senior Account Manager Retail - Netherlands
- Supply Allocation and Inventory Manager - Fresh Produce, Italy
- Senior Grower - Katunga, Australia
- Key Account Manager - Netherlands
- Accountmanager aardappelinkoop België / Frankrijk
- International Retail Manager - Netherlands
- Quality Assurance Team EA Region -Antwerp- Quality Supervisor, Belgium
Last commentsmore »
- India: Government gives 50% subsidy on a poly house (950)
- Women's Day: "Russian market is growing up" (2)
- Danish greens grower expands with first own bred peperomias (1)
- Export stop Australia as of March 1 2018 (1)
- Colombia, Kenya and China: What's their recipe for success? (1)
- "Proven Winners is just getting started" (1)
- Will sea freight be an alternative to Latin American air freight? (25)
- Market reports: solid research or wild guesses? (4)
- US: AFE educational grant applications due June 1 (3)
- Mother’s Day means Money Day for UK florists (2)
Top 5 - yesterday
Top 5 - last week
Top 5 - last month
Exchange ratesmore »
Mass insect migrations in UK skiesFor the first time, scientists have measured the movements of high-flying insects in the skies over southern England – and found that about 3.5 trillion migrate over the region every year.
Scientists recorded movement above radar sites in southern England and found large seasonal differences, with mass migrations of insects generally going northwards in spring and southwards in autumn. Until now, radar studies have measured migrations of relatively few nocturnal species of agricultural pests, and no study previously examined the vast numbers of daytime migrants.
Researchers from the University of Exeter and Rothamsted Research, which receives strategic funding from the BBSRC, captured the movement of 3,200 tons of biomass, using specialised radar techniques. This movement is more than seven times the mass of the 30 million songbirds which depart the UK for Africa each autumn. It is also the equivalent of about 20,000 flying reindeer. The study is published on 22 December 2016 in the journal Science.
Dr Jason Chapman, of the Centre for Ecology and Conservation at the University of Exeter’s Penryn Campus in Cornwall, said: “Insect bodies are rich in nutrients and the importance of these movements is underappreciated.”
“If the densities observed over southern UK are extrapolated to the airspace above all continental landmasses, high-altitude insect migration represents the most important annual animal movement in ecosystems on land, comparable to the most significant oceanic migrations.”
Although the origin and destination of each insect was not recorded, evidence from previous research suggests many will have been travelling to and from the UK over the English Channel and North Sea.
The scientists recorded movement above radar sites in southern England and found large seasonal differences, with mass migrations of insects generally going northwards in spring and southwards in autumn.
Until now, radar studies have measured migrations of relatively few nocturnal species of agricultural pests, and no study previously examined the vast numbers of daytime migrants.
The study found seasonal variations from year to year, but overall the net northward spring movements of larger insects were almost exactly cancelled out by net southward movements in autumn over the 10-year research period.
Dr Gao Hu, a visiting scholar with Dr Chapman from Nanjing Agricultural University, China, led the analyses of the radar data.
He said: “Many of the insects we studied provide important ecological services which are essential for maintaining healthy ecosystems, such as pollination, predation of crop pests and providing food for insectivorous birds and bats.”
Co-author Dr Ka S (Jason) Lim, of the Radar Entomology Unit of the AgroEcology Department at Rothamsted Research, said migratory insects can serve as indicators of global environmental condition.
“Animal migration, especially in insects, is a very complex behaviour which takes millions of year to evolve and is very sensitive to climatic condition,” he said.
For more information:
Publication date: 12/23/2016
Other news in this sector:
Leave a comment: (max. 500 characters)
- All comments which are not related to the article contents will be removed.
- All comments with non-related commercial content, will be removed.
- All comments with offensive language, will be removed.