Henk Tennekes
5057 resultaten
Insect extinction by urbanization: A long term study in Rome
25 juli 2011Previous studies deduced negative effects of urbanization on insect conservation from decline in species richness with increasing built-up areas. This…Overige insecten
Imidacloprid and acetamiprid detected at concentration levels up to 3.6 ppm in chestnut, shallot, ginger and tea
25 juli 2011This work reports a new sensitive multi-residue liquid chromatography–tandem mass spectrometry (LC–MS/MS) method for detection, confirmation and quantification of six…Mensen
Les insecticides granulaires induiraient des changements importants chez les populations de certaines espèces d’oiseaux dans les terres agricoles des prairies
25 juli 2011Nous avons cherché à savoir si les insecticides, lorsque utilisés sous forme granulaire et de façon intensive pour contrôler l'altise…Overige insecten
Patterns of bird species abundance in relation to granular insecticide use in the Canadian prairies
25 juli 2011We examined the possibility that granular insecticides, used intensively in the Canadian prairies to control flea beetles (Phyllotreta sp.) in…PrairievogelsWidespread declines of larger moths affects birds, bats and mammals, which depend on them
25 juli 2011In the Netherlands, 766 species of larger moths are considered native. About one-third of the species are decreasing and all…Algemeen
Depletion of arthropod fauna and in particular the decline of large arthropods on intensively used meadows
25 juli 2011We studied arthropod occurrence in fallow land, extensively used pastures, extensively used meadows (cut twice or three times a year)…Overige insecten
Historical declines in chimney swift populations are associated with dramatic changes in insect prey consumption
25 juli 2011Aerially-foraging insectivorous birds have experienced dramatic population declines in North America over the past several decades, but a dearth of…Overige insecten
In the past 40 years, Canadian swift populations have plummeted by 96%
25 juli 2011The Chimney Swift Chaetura pelagica is a little, high-flying, dark grey bird whose diet consists entirely of insects caught on…Zwaluwen
Canadian Barn Swallows in Steep Decline Since 1990s
25 juli 2011Widespread and familiar, the Barn Swallow (Hirundo rustica) is well monitored in Canada by the Breeding Bird Survey (BBS). BBS…Zwaluwen
Présence d’un gradient géographique dans le déclin des insectivores aériens
25 juli 2011Les populations d’oiseaux nord-américains qui se nourrissent d’insectes aériens montrent un déclin à grande échelle. Une analyse des données de…Zwaluwen
Declines of Aerial Insectivores in North America
25 juli 2011North American birds that feed on aerial insects are experiencing widespread population declines. An analysis of the North American Breeding…Zwaluwen
1000 Critically Endangered, Endangered and Vulnerable Bird Species Are Currently in Decline
25 juli 2011Of the world’s threatened birds (n = 1,253 Critically Endangered, Endangered and Vulnerable bird species. Analysis of data held in…Algemeen
De weidevogels verdwijnen uit Zuid-Holland
22 juli 2011De stand van weidevogels neemt jaarlijks verder af met 3% in de provincie Zuid-Holland. Dit terwijl het karakteristieke weidelandschap in…WeidevogelsCommissie Europees Parlement wil verbod op neonicotinoiden – Ctgb handhaaft alle toelatingen
22 juli 2011Imidacloprid en andere neonicotinoïden moeten in heel Europa in de ban. Dat bepleit de commissie milieu, volksgezondheid en voedselveiligheid van…European Parliament Committee calls on the Commission to impose an EU-wide ban on the use of neonicotinoid pesticides
21 juli 2011The European Parliament Committee on the Environment, Public Health and Food Safety calls on the Commission to comply with the…
Pathogènes et insecticides : un cocktail mortel pour les abeilles
21 juli 2011L’infection par Nosema ceranae, un parasite responsable de la nosémose (1), entraîne une plus forte mortalité des abeilles lorsque celles-ci…Bijen
Deventer bijenlint dwars door de stad
19 juli 2011Na Zutphen gaat nu ook Transition Town Deventer op pad om een Bijenlint te creëren, dwars door de stad. Van…BijenHenk Tennekes: ‘Het boerenland verandert voor onze ogen in een kerkhof van de biodiversiteit’
19 juli 2011Het College voor de toelating gewasbeschermingsmiddelen en biociden (Ctgb) heeft de herbeoordeling van de neonicotinoide insecticiden uitgevoerd en hierover naar…
Seit 1990 zwei Drittel weniger Wiesen-Schmetterlinge
19 juli 2011Unseren Schmetterlingen geht es immer schlechter. Untersuchungen in 15 europäischen Ländern ergaben bei typischen Bewohnern von Wiesen und Weiden in…Vlinders
Decreased Functional Diversity and Biological Pest Control in Conventional Compared to Organic Crop Fields
18 juli 2011We assessed 30 triticale fields (15 organic vs. 15 conventional) and recorded vascular plants, pollinators, aphids and their predators. Further,…Bijen
Wildbienen sind dem Risiko der Pestizidbelastung besonders ausgesetzt
18 juli 2011Pestizide stellen einen möglichen Grund für die Diversitäts- und Bestäuberabnahme dar. Es ist jedoch wenig über die Wirkung von Pestiziden…Bijen
Wild bees are an insect pollinator group at particular risk from insecticide use
18 juli 2011Pesticides are an important potential cause of biodiversity and pollinator decline. Little is known about the impacts of pesticides on…Bijen
Negatief verband tussen de biodiversiteit van wilde bestuivers en het insecticidengebruik
18 juli 2011De afgelopen jaren gaat het niet goed met insecten die zorgen voor de bestuiving van planten. Het aantal bijen in…BijenWhite-Nose Syndrome in bats: Biologists characterize species loss as unprecedented
17 juli 2011In Jefferson County, the bat population has declined more than 50 percent during the past couple of years. White-nose syndrome,…Vleermuizen
