Despite relatively good knowledge of the biogeochemistry of Siberian thermokarst lakes during summer base flow, their seasonal dynamics remains almost unexplored. This work describes the chemical composition of ∼ 130 thermokarst lakes ranging in size from a few m to several km, located in the discontinuous permafrost zone. Lakes were sampled during spring flood, just after the ice break (early ...

Western honey bee (Apis mellifera) colonies in Nova Scotia, Canada were sampled in spring and late summer 2007 to evaluate efficacy of fumagillin dicyclohexylammonium (hereafter, fumagillin) against Nosema ceranae. Colonies treated with fumagillin in September 2006 (n=94) had significantly lower Nosema intensity in spring 2007 than did colonies that received no treatment (n=51), but by late sum...

1. Since the early 1990s, an increasing proportion of barnacle geese, Branta leucopsis, bound for breeding sites in the Russian Arctic delay their departure from the wintering quarters in the Wadden Sea by 4 weeks. These late-migrating geese skip spring stopover sites in the Baltic traditionally used by the entire population. 2. Individual geese from an arctic colony tracked by satellite or lig...

Relevance . The creation of new varieties with a complex economically valuable and biologically traits is an urgent direction breeding research, updating expanding the assortment cherries. Methods characteristics economic biological properties description eight cherries Dagestan selection are presented: Pokrovskaya Memory, Buinakskaya black, Maral, Elite form 129/1, Leningrad Guards, Dolores, P...

In the Kansas Flint Hills, grassland burning is conducted during a relatively narrow window because management recommendations for the past 40 years have been to burn only in late spring. Widespread prescribed burning within this restricted time frame frequently creates smoke management issues downwind. A potential remedy for the concentrated smoke production in late spring is to expand burning...

One of the most dramatic and widely appreciated natural history insights of recent decades has been the recording of the songs of the male humpback whale. Humans have valued the complexity and haunting tones produced by one of the largest marine mammals. The songs have been thought to play a key role in the mating process in their winter feeding grounds, which, for the Atlantic population, occu...