Sentences with phrase «on vegetation productivity»

However, dry - spell duration and warming trend effects on vegetation productivity may be at least partly offset by rising atmospheric CO2 effects on plants (Bachelet et al., 2001; Thuiller et al., 2006b), leading to sometimes contrasting projections for deserts that are based on different modelling techniques that either incorporate or ignore CO2 - fertilisation effects.

Not exact matches

The simulations suggested that the indirect effects of increased CO2 on net primary productivity (how much carbon dioxide vegetation takes in during photosynthesis minus how much carbon dioxide the plants release during respiration) are large and variable, ranging from less than 10 per cent to more than 100 per cent of the size of direct effects.

Vegetation productivity or leaf cover can, for example, be measured across continents from space while providing information about biodiversity levels on the ground.

The approach of the researchers has been to identify climate drivers of vegetation productivity on monthly timescales.

For example, Dafflon et al. [2017] demonstrated in a polygonal tundra how soil electrical resistivity tomography and vegetation activity cameras can be merged with in situ measurements in a way to corroborate the role of active layer thickness and polygon geometry on spatial control on productivity, and demonstrate how changes in solute concentration and unfrozen water content in winter contributes to acceleration of permafrost thaw.

It uses data on vegetation growth (strictly speaking, «gross primary productivity») from 1901 to 2010.

Four vegetation models display discontinuities across 4 °C of warming, indicating global thresholds in the balance of positive and negative influences on productivity and biomass.

However, global - scale vegetation model development has strongly focused on productivity processes whereas, apart from major disturbances such as fire, the dynamics of carbon turnover have been largely ignored.

That the biosphere experienced any productivity improvement at all, let alone a doubling, is truly amazing; and it demonstrates in part the powerful impact atmospheric CO2 enrichment is exerting on Earth's vegetation.

What will be the next effects of increased CO2 on agricultural and forest productivity, and other vegetation?

They identified climate drivers of vegetation productivity on monthly timescales and computed the sensitivity index.

The index then compares these variables with the productivity of vegetation under changing climate on a global scale.

For example, it has been proposed that the vegetation of the Amazon basin is highly dependent on Saharan dust deposition, which provides phosphorus, necessary for maintenance of long - term productivity (Okin et al., 2004; Section 7.3).

Satellite measures of vegetation greenness, together with animal stocking data and key climatic factors, reveal interannual precipitation variability to be a significant constraint on global pasture productivity.

Climate change and direct human land - use pressure are likely to have synergistic impacts on desert ecosystems and species that may be offset, at least partly, by vegetation productivity and carbon sequestration gains due to rising atmospheric CO2.

Studies also suggest there could be impacts on the carbon cycle (Zickfeld et al, 2008) and on soil moisture and primary productivity of the terrestrial vegetation (Vellinga and Wood, 2002).»

Walker and colleagues have found that the vegetation's productivity depends on summer land temperature and late spring sea - ice concentration.

I think the briefest answer to the question would be yes, some positive impacts of increased CO2 on plant productivity are expected, but some negative impacts on vegetation are also expected, and many uncertainties remain concerning vegetation responses to increased CO2 and climate change.