Sentences with phrase «on tundra ecosystems»

We wanted to study herbivore effects on tundra ecosystems over longer time scales, so we had to come up with a different solution,» says Dagmar Egelkraut.

Not exact matches

«Representation,» for example, is one large - scale strategy, focused on preserving representative areas of every identifiable ecosystem, such as savannah, tropical moist forest, tundra, desert, coral reef.

However, it is important to know whether the response depends on the abundance of grazing animals, particularly reindeer, voles and lemmings, which are very common in tundra ecosystems.

When the geese arrive in the Arctic to breed, they forage on the sparse tundra vegetation and their droppings fertilize an ecosystem that does not usually receive many nutrients.

This pattern has emerged time and again in studies on ecosystems ranging from grasslands to Arctic tundra.

More moose are loose and on the move as they invade previously uninhabitable areas of the Alaskan tundra, according to a new study that revealed how global warming continues to change our ecosystem.

Geochemical Influences on Solubility of Soil Organic Carbon in Arctic Tundra Ecosystems.

In the Arctic, the tipping points identified in the new report, published on Friday, include: growth in vegetation on tundra, which replaces reflective snow and ice with darker vegetation, thus absorbing more heat; higher releases of methane, a potent greenhouse gas, from the tundra as it warms; shifts in snow distribution that warm the ocean, resulting in altered climate patterns as far away as Asia, where the monsoon could be effected; and the collapse of some key Arctic fisheries, with knock - on effects on ocean ecosystems around the globe.»

We'll present a couple illustrations before we'll get to the actual publication we hope to discuss — one that compares methodology of science - based and «science - denying» climate websites but that also touches on a subject we personally find far more interesting: what's actually going on in the Arctic, an area that is not only experiencing major physical consequences of climate change, but that is subsequently also set to be a stage for a cascade of ecological consequences of this climate change — both in the Arctic tundra biome and in the adjacent Arctic marine ecosystem.

On land, permafrost is overlain by a surface «active layer», which thaws during summer and forms part of the tundra ecosystem.

Thawing permafrost is also expected to alter area landscapes and make local ecosystems more susceptible to long - term damage, in part because permafrost degradation can lead to significant changes in local soil temperatures and moisture levels.14, 20,21 Soils on or near the banks of thermokarst ponds tend to be much drier than those on level tundra, owing to higher soil temperatures and drainage.14, 20,21 On the Seward Peninsula, the banks of these ponds host trees (usually spruces) and shrubs that are otherwise usually absent in the characteristically treeless tundra.14, on or near the banks of thermokarst ponds tend to be much drier than those on level tundra, owing to higher soil temperatures and drainage.14, 20,21 On the Seward Peninsula, the banks of these ponds host trees (usually spruces) and shrubs that are otherwise usually absent in the characteristically treeless tundra.14, on level tundra, owing to higher soil temperatures and drainage.14, 20,21 On the Seward Peninsula, the banks of these ponds host trees (usually spruces) and shrubs that are otherwise usually absent in the characteristically treeless tundra.14, On the Seward Peninsula, the banks of these ponds host trees (usually spruces) and shrubs that are otherwise usually absent in the characteristically treeless tundra.14, 21

The systems and sectors are some ecosystems (tundra, boreal forest, mountain, mediterranean - type, mangroves, salt marshes, coral reefs and the sea - ice biome), low - lying coasts, water resources in some dry regions at mid-latitudes and in the dry topics and in areas dependent on snow and ice melt, agriculture in low - latitude regions, and human health in areas with low adaptive capacity.