Results 31 to 40 of about 106,095 (165)

EFFECTS OF LAND COVER, WATER REDISTRIBUTION, AND TEMPERATURE ON ECOSYSTEM PROCESSES IN THE SOUTH PLATTE BASIN [PDF]

open access: yes, 1998
Over one‐third of the land area in the South Platte Basin of Colorado, Nebraska, and Wyoming, has been converted to croplands. Irrigated cropland now comprises 8% of the basin, while dry croplands make up 31%.
Band, Larry E.   +5 more
core   +1 more source

Solving the woolly mammoth conundrum: amino acid 15N-enrichment suggests a distinct forage or habitat [PDF]

open access: yes, 2015
Understanding woolly mammoth ecology is key to understanding Pleistocene community dynamics and evaluating the roles of human hunting and climate change in late Quaternary megafaunal extinctions. Previous isotopic studies of mammoths’ diet and physiology
Longstaffe, Fred J   +3 more
core   +2 more sources

The Tundras and steppes of prehistoric Europe [PDF]

open access: yesScottish Geographical Magazine, 1898
(1898). The Tundras and steppes of prehistoric Europe. Scottish Geographical Magazine: Vol. 14, No. 6, pp. 281-294.
openaire   +4 more sources

Nitrate uptake across biomes and the influence of elemental stoichiometry: A new look at LINX II [PDF]

open access: yes, 2016
Considering recent increases in anthropogenic N loading, it is essential to identify the controls on N removal and retention in aquatic ecosystems because the fate of N has consequences for water quality in streams and downstream ecosystems.
Coble, Ashley A.   +3 more
core   +2 more sources

Evapotranspiration changes in the forest-steppe and steppe zones under soil mulching [PDF]

open access: yesJournal of Hydrology and Hydromechanics, 2013
Abstract This paper contains the method and results of calculation evapotranspiration and its structure - transpiration and evaporation from traditionally tilled and mulched soil. The data considered indicate that in the arid regions of territory under study the evapotranspiration when soil is mulched does not change significantly and only the ...
openaire   +4 more sources

Use of leaf thickness sensors in horticultural crops [PDF]

open access: yes, 2017
Changes in leaf thickness can be a rapid indicator of the plant’s water status and can therefore serve as an alarm signal for potential water deficits. Combining the use of continuous leaf thickness measurements with a mechanistic plant model describing ...
De Pauw, Dirk   +3 more
core   +2 more sources

Sustainable Planning of Land Use Changes in farming areas under ecological protection [PDF]

open access: yes, 2010
Land use has been changing in the last decades because of agricultural intensification and land abandonment which implies deterioration in the optimum habitat structure and quality.
Brasa-Ramos, A.   +3 more
core   +1 more source

Asymmetric warming significantly affects net primary production, but not ecosystem carbon balances of forest and grassland ecosystems in northern China [PDF]

open access: yes, 2015
We combine the process-based ecosystem model (Biome-BGC) with climate change-scenarios based on both RegCM3 model outputs and historic observed trends to quantify differential effects of symmetric and asymmetric warming on ecosystem net primary ...
Axmacher, JC, Feng, J, Sang, W, Su, H
core   +1 more source

Landscape heterogeneity influences on sheep habits under extensive grazing management in Southern Patagonia [PDF]

open access: yes, 2015
In Southern Patagonia, continuous grazing with fixed stocking rates in large paddocks prevails over grazing systems subjected to regular evaluations and rotational rests.
Peri, Pablo Luis
core  

The impact of climate change on the structure of Pleistocene mammoth steppe food webs

open access: yes, 2013
Species interactions shape predator-prey networks, impacting community structure and, potentially, ecological dynamics. It is likely that global climatic perturbations that occur over long periods of time have a significant impact on species interactions
Bocherens, Herve   +3 more
core   +1 more source

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