Sentences with phrase «tundra ecosystems»

A recent scientific paper looking at Latin America lists «similar patterns of ecosystem recovery following rural - urban migration» in Patagonia, northwest Argentina, Ecuador, Mexico, Honduras and the montane deserts and Andean tundra ecosystems of Bolivia, Argentina and Peru.

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.

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

The study has important implications for predicting which arctic plant species will dominate as the climate warms, as well as how much carbon tundra ecosystems can store.

Rastetter stresses that more research is needed to confirm the study's findings and to better understand the importance of nitrate relative to other forms of nitrogen in arctic 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.

The team documented carbon dioxide exchange during 3 years of growing seasons in an upland tundra ecosystem in the northern foothills of the Alaska Range.

I suspect, but don't have the solid evidence yet, that human agency is underestimated as a key factor in stucturing past and present tundra and forest - tundra ecosystems of northwest Eurasia.

The 19.8 % average increase in aboveground [Arctic tundra] biomass has major implications for Arctic tundra ecosystems, including their hydrology, permafrost and wildlife, and for how humans exploit Arctic landscapes.

This assumption, however, was contradicted by scientists from the University of Eastern Finland a decade ago, when they discovered that bare peat surfaces in permafrost peatlands are releasing high amounts of N2O, despite the general nitrogen limitation of tundra ecosystems.

The tundra ecosystem that arose in the absence of these large grazing species is now affected by and contributing to human - driven climate change.

For example, elephants with genes modified to express mammoth traits could expand into the Arctic, re-establishing lost productivity to the tundra ecosystem.

The amount of habitat available for temperate and tundra ecosystems is declining as tropical and subtropical climate zones expand, pushing species like polar bears to toward extinction.

If the birds are being negatively affected, this not only impacts the tundra ecosystem but also the places where these birds winter.

«Tundra ecosystems are taking up increasingly more carbon during the growing season over the past several decades, but this has been offset by increasing carbon loss during the winter,» the report's executive summary reads.

Modelling carbon responses of tundra ecosystems to historical and projected climate: sensitivity of pan-Arctic carbon storage to temporal and spatial variation in climate.

Kim Y, Park S - J, Lee B - Y, Risk D (2016) Continuous measurement of soil carbon efflux with Forced Diffusion (FD) chambers in a tundra ecosystem of Alaska.

Boreal forest and Arctic tundra ecosystems are projected generally to show increased growth due to longer and warmer growing seasons (Lucht et al., 2002; Figure 4.3).

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

These include tropical forests, savannahs, boreal forests and tundra ecosystems.