Once free to flit over millions of acres of unmolested prairie, the humble Dakota skipper's range has been drastically reduced over time. It was relatively easy in the 1970s for Robert Dana to find the Dakota skipper (Hesperia dacotae), a pollinator that clings to scattered remnants of native prairie that provide its habitat. "It wasn't difficult to find," he said.
Recent declining numbers of honeybees, Apis mellifera, in colonies threatens crop production as well as feral plant community biodiversity. Chemicals applied in agroecosystems are regarded as one of primary causes of the decline. In Japan, the heavy loss of honeybee colonies associated with pesticide use has been reported from beekeepers recently, leading to lessened use of honeybee colonies to facilitate pollination of cultivates. Nevertheless, no study has quantitatively examined the damage to honeybee colonies caused by the pesticide application in Japanese agricultural fields to date.
Non-target aquatic insects are susceptible to chronic neonicotinoid insecticide exposure during the early stages of development from repeated run-off events and prolonged persistence of these chemicals. Investigations on the chronic toxicity of neonicotinoids to aquatic invertebrates have been limited to a few species, under different laboratory conditions that often preclude direct comparisons of the relative toxicity of different compounds.
Researchers from Mainz University Medical Center and Goethe University Frankfurt discovered that the use of active systemic insecticides called neonicotinoids causes the alarming bee mortality. The study was published in the journal PLOS ONE. It is led by Professor Ignatz Wessler of the Institute of Pathology at the University Medical Center of Johannes Gutenberg University Mainz and collaborated with Professor Bern Grunewald of the Bee Research Institute at Goethe University Frankfurt and other colleagues.
Die beiden Flugkünstler Mehlschwalbe und Mauersegler sind die Verlierer der "Stunde der Gartenvögel". Mit Platz elf bei der Mehlschwalbe und Platz zwölf beim Mauersegler setzt sich der Abwärtstrend der vergangenen Jahre fort. Seit Beginn der Laien-Vogelzählung ist in den vergangenen zehn Jahren ein Rückgang um 41 Prozent bei der Mehlschwalbe, beim Mauersegler sogar um 45 Prozent, zu beobachten.
Spain‘s colorful array of birds have made the country a renowned bird watching spot. But it may no longer be a haven for the birds and the people who love them. A new report from SEO/BirdLife Spain says that Spain has lost 64.5 million birds in the past 20 years. Over 1,000 SACRE scientists came together to collect bird data between 1996 and 2015, reports Andrea Small for Audubon. The scientists would go to a spot two times each spring to record the birds that they saw and heard. In total, the scientists collected data from 20,000 stations.
While pesticide companies and some researchers say the tiny Varroa mite is the main culprit in declining honeybee health, new Dutch research concludes that bees are more vulnerable to mites and other stressors because of their constant diet of neonicotinoid insecticides. The debate about what's killing honeybees and other pollinators has continued for several years, with Varroa mites largely taking the blame for colony collapse disorder.
Industry association PlasticsEurope has joined MEPs, health campaigners and other industry groups in criticising long-overdue criteria to define endocrine disrupting chemicals (EDCs) which the European Commission published this week. While the comments themselves differed, there was agreement that the criteria, required to determine what substances should be banned as hormone-shifting endocrine disruptors under European Union biocides and pesticides regulations, were not in line with the legislation.
Today the European Commission presents criteria to identify endocrine disruptors in the field of plant protection products and biocides. The Commission proposes to the Council and the European Parliament to adopt a strong science-based approach to the identification of endocrine disruptors and to endorse the WHO definition. Endocrine disruptors are substances, both natural and chemical, that can alter the functions of the hormonal system and consequently cause adverse effects on people or animals.
To determine the exposure of native bees to pesticides, bees were collected from an existing research area in northeastern Colorado in both grasslands (2013–2014) and wheat fields (2014). Traps were deployed bi-monthly during the summer at each land cover type and all bees, regardless of species, were composited as whole samples and analyzed for 136 current-use pesticides and degradates. This reconnaissance approach provides a sampling of all species and represents overall pesticide exposure (internal and external).