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When Bees are becoming fewer threatened the pollination of fruit and vegetables. From several sources, most recently the cascade room the US, reported a dramatic reduction in several hops species. A modified agriculture may be behind.
- Both the habitat and food availability, ie, pollen and nectar, has worsened, says Anna Persson, PhD in Animal Ecology at Lund, who studies bees and wild bees.
Classic prolonged use, where the hay was salvaged on the flower-rich meadows, does not belong in modern agriculture. Intensive farming displaces the space for flowers along roadsides and ditches. the cascade room With fewer plant species in the landscape deteriorate insects conditions. Pesticides, disease and inbreeding is another threat.
According to a recent American study has some hops species in the United States decreased by up to 90 percent in recent decades. Even in Western Europe noted sharp declines in pollinator.
Bumble bees and wild bees do a better job than pollination domesticated honeybees, if we look at every single insect. For tomato cultivation requires bumblebees as pollinators. Sunflower, melon and coffee gives higher yield when wild bees take care of pollination.
Anna Persson species diversity is a key concept. Rich flora provides strong strains of insects that can pollinate. The more kinds of insects involved in the pollination, the richer harvest of fruits and seeds. Unfortunately, she says, are we heading in the opposite direction. This increases the vulnerability, for example, when climate change.
Bumblebees are a group of social bees with some 30 species in Sweden originate from alpine areas and are found primarily in the northern hemisphere has a hårpäls that protects against cold can also raise body temperature by vibrating air muscles can be active longer time of year and more hours per day than other pollinating insects buzzing wings inside the flower they visit, providing efficient pollination sold to serve as pollinators in greenhouses. Sources: National Encyclopedia and Anna Persson, Lund University
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