Research press release


Nature Communications

Ecology: Status of Britain’s wild pollinating insects assessed



今回、Gary Powneyたちの研究グループは、花粉媒介昆虫であるハチとハナアブの野生種(計353種)のデータとモデル化手法とを組み合わせて、これらの昆虫が占めていた1キロメートル四方の区域の割合を1980~2013年にわたって評価した。その結果、この期間中に1区域当たり平均11種(ハチ4種とハナアブ7種)が正味で減少していたことが判明した。また、高地に生息する種が55%減少したことも明らかになった。これに対して、例えば、セイヨウオオマルハナバチ(Bombus terrestris)などの一般的な作物花粉媒介昆虫種は12%増加していた。


An assessment of changes in the areas of Britain occupied by wild pollinator bee and hoverfly species between 1980 and 2013 is presented in Nature Communications. The study reports that a third of the species experienced declines. However, key bee species responsible for crop pollination increased.

Pollinator loss is a widespread concern with implications for food production and threats to pollinators include habitat loss, pesticide use and climate change. However, large-scale estimates of changes in the distributions of pollinating insects have been lacking.

Gary Powney and colleagues combined data for 353 wild bee and hoverfly species with modelling approaches to estimate the proportion of 1 km2 grid cells occupied by these pollinators between 1980 and 2013. The authors found there was a net loss of 11 species (4 bees and 7 hoverflies) on average per cell over the time period. They also identified a 55% decline in species inhabiting uplands. However, a 12% increase in common crop pollinator species, such as Bombus terrestris, was observed.

The authors suggest that farmland environmental policies may be aiding common crop pollinators, although pollinating insects from outside agriculture remain under threat. They argue that further effort is needed to develop new management approaches that restore habitat and food resources for pollinators across the wider landscape.

doi: 10.1038/s41467-019-08974-9

「Nature 関連誌注目のハイライト」は、ネイチャー広報部門が報道関係者向けに作成したリリースを翻訳したものです。より正確かつ詳細な情報が必要な場合には、必ず原著論文をご覧ください。

メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週最新のNature 関連誌のハイライトを皆様にお届けいたします。