Other insects

Massive reductions in arthropod abundance in Puerto Rico’s rainforest are indirectly precipitating a collapse of the forest food web

Arthropods, invertebrates including insects that have external skeletons, are declining at an alarming rate. While the tropics harbor the majority of arthropod species, little is known about trends in their abundance. We compared arthropod biomass in Puerto Rico’s Luquillo rainforest with data taken during the 1970s and found that biomass had fallen 10 to 60 times. Our analyses revealed synchronous declines in the lizards, frogs, and birds that eat arthropods.

At long last American entomologists start to realize that insect decline is a general problem

A staple of summer – swarms of bugs – seems to be a thing of the past. And that’s got scientists worried. Pesky mosquitoes, disease-carrying ticks, crop-munching aphids and cockroaches are doing just fine. But the more beneficial flying insects of summer – native bees, moths, butterflies, ladybugs, lovebugs, mayflies and fireflies – appear to be less abundant. Scientists think something is amiss, but they can’t be certain: In the past, they didn’t systematically count the population of flying insects, so they can’t make a proper comparison to today.

Pesticide levels above the set EU standard in four Irish water supplies

Four water supplies, one in Kilkenny, two in Limerick and one in Longford currently have a level of pesticides above the set EU standard, according to Irish Water. The pesticide that is being detected most frequently in drinking water supplies in Ireland is an herbicide called MCPA. This herbicide is in many products used to control thistle, dock and rush. This increase is because products containing MCPA are being used to control weeds on hard surfaces, in gardens, on farms or in forestry.

Neonicotinoid Residues in Nectar and Foliage of Systemically Treated Woody Landscape Plants

We measured uptake and dissipation of soil-applied imidacloprid and dinotefuran in nectar and leaves of 2 woody plant species, a broadleaf evergreen tree (Ilex attenuata) and a deciduous shrub (Clethra alnifolia), to assess concentrations to which pollinators and pests might be exposed in landscape settings. Three application timings, autumn (postbloom), spring (prebloom), and summer (early postbloom), were evaluated to see if taking advantage of differences in the neonicotinoids’ systemic mobility and persistence might enable pest control while minimizing transference into nectar.

Seit dem Jahr 2000 ist die Zahl der Käfer stark gesunken in der Bundesrepublik

Das Insektensterben in der Bundesrepublik hat besorgniserregende Ausmaße erreicht. „Eine aktuelle Studie bestätigt den Rückgang der Biomasse fliegender Insekten um 75 Prozent“, sagt der Greifswalder Zoologieprofessor Michael Schmitt. Es betrifft nicht nur die Bienen, über die in jüngster Zeit viel diskutiert wurde, sondern auch viele andere Arten. In den Jahren 1990 bis 2017 sind 63 Arten und zehn Unterarten der Blatt- und Samenkäfer wahrscheinlich in Mitteleuropa ausgestorben. Denn es gibt keine Nachrichten über ihr Auftreten in der Datenbank CryFaun mehr.

Alarm over toxic pesticide sprayed on Scotland’s woodlands

Scotland’s forests are treated and sprayed every year with hundreds of kilograms of a toxic pesticide blamed for killing bees and butterflies, The Ferret can reveal. Our investigation has uncovered widespread use of the nicotine-based insecticide, acetamiprid, by the forestry industry, provoking concerns from experts and alarm from environmentalists who fear “creeping degradation” of nature.

Butterfly numbers in the UK's woods have dropped by almost 60% since 1990

Since 1990, butterfly numbers have dropped by 58 per cent in woods, a government study has found. The report was published in June 2018 by the Department for environment, food and rural affairs (Defra). Woodland species that are struggling include the brown argus, common blue, peacock and purple hairstreak .In response to the report, charities have claimed that reform is needed to the country's farming laws in order to protect the environment in the wake of Brexit. They say the latest figures offer more evidence to support expert predictions of an 'ecological Armageddon'.

Biodiversity in crisis: How close to the brink is life on Earth?

“SEE those little beetles with a black cross on a red background?” I lean in to take a look. “They’re Panagaeus cruxmajor – the crucifix ground beetle. They were collected by Charles Darwin back in the 1820s.” Ed Turner is curator of insects at the University of Cambridge’s Zoology Museum, where many of Darwin’s beetle collections are held. He is proud to show me specimens collected by the man himself, and I am chuffed to see them. But the thrill doesn’t last.

Zwaluwen gaan ten onder aan het gebrek aan insecten

Het lijkt misschien prettig, minder insecten die van de voorruit gewassen moeten worden of ons lastig vallen in de tuin. Maar de massale insectensterfte is vooral heel zorgelijk en gevaarlijk voor de kringloop van het leven. Al jaren neemt het aantal insecten af, in sommige gebieden is in de afgelopen decennia zelfs een daling tot 75% geregistreerd. Dit blijft niet zonder gevolgen. Ecoloog Jan Doevendans volgt al tientallen jaren de zwaluwpopulaties. Sinds de jaren ’70 heeft hij honderden nestkasten opgehangen, onder meer in Groningen en het Lauwersmeergebied.