Hungry for a little plant diversity? Let us mix some up! First, we gather available ingredients—a bit of soil, few nutrients, and selection nearby plants. Then, add them together, pour onto landscape let our concoction sit. Sound easy enough? But wait… was that soil used too acidic? Did enough liquid? Was flat or tilted? How can adjust recipe to grow the most species in one place? As ecologists...

Microbiological investigations were made in the No rth Pacific subarctic water during spring of 1969. Total bacteria, heterotrophic bacteria, yeasts, and glucose uptake by microorganisms were measured in the euphotic zone. There was no heterogeneity in the distribution of microbial biomasses between Alaskan Gyre, mid-Pacific transitional water, and Western Gyre. Another statistical analysis sho...

Propagation of subsurface North Pacific interdecadal variations is investigated with an ocean general circulation model forced by observed sea surface temperature anomalies. Subsurface temperature anomalies subducted in the central subtropical North Pacific take a more westward pathway than a passive “temperature” tracer and reach the western boundary to the north of the bifurcation latitude. T...

Information on the cladocerans of Eastern Palaerctic is limited, and remote islands of Arctic and Subarctic in this region are among inadequately studied territories, i.e. due to a very limited access to them. "Nearctic" Eurycercus longirostris is reported here for the first time from Bering Island and Wrangel Island. Also E. macracanthus is found to be common in Kamchatka Peninsula, while prev...

fertilization on plant defence compounds in subarctic tundra heath vegetation Jonathan R. De Long*, Maja K. Sundqvist, Michael J. Gundale, Reiner Giesler and David A. Wardle Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, SE-901 83 Ume a, Sweden; Department of Ecology and Environmental Sciences, Ume a University, SE-901 87 Ume a, Sweden; Center for Macroe...

Surface albedo estimates based on optical and microwave satellite data were compared to corresponding ground based values in a Subarctic boreal forest test site. The ground based albedo values were derived from radiation measurements carried out at the forest floor using an albedo model and measured global and diffuse radiation data. The use of both optical and microwave satellite data turned o...

Since the first evidence of low algal productivity during ice ages in the Antarctic Zone of the Southern Ocean was discovered, there has been debate as to whether it was associated with increased polar ocean stratification or with sea-ice cover, shortening the productive season. The sediment concentration of biogenic barium at Ocean Drilling Program site 882 indicates low algal productivity dur...

Subarctic populations of “cryptic” blue mussel species Mytilus edulis ( ME ) and M. trossulus MT are less studied than Arctic boreal populations. Ecological features in sympatry poorly known everywhere. We the habitat segregation interannual dynamics their mixed settlements at Murman coast Barents Sea, northeastern boundary Atlantic littoral communities. Previous data on mussels from this area ...

Climate change in the (Sub)Arctic is expected to be more extreme and rapid compared to other regions in the world (IPCC 2007). Tundra and peatlands are the main ecosystem components at these northern latitudes, which are largely dominated by lichens and bryophytes fulfilling important ecosystems functions (see General Introduction, Longton 1988; Rydin & Jeglum 2006). As both biodiversity and ve...