Results 81 to 90 of about 3,051,946 (243)

When is evolutionary branching in predator-prey systems possible with an explicit carrying capacity? [PDF]

, 2007
In this study we use the theory of adaptive dynamics firstly to explore the differences in evolutionary behaviour of a generalist predator (or more specifically an omnivorous or intraguild predator) in a predator-prey model, with a Holling Type II ...
Hoyle, Andrew, Bowers, Roger
core   +1 more source

Should we promote grassland ? A microeconomic analysis

, 2002
Unfavourable or no incentives at all make the farmers use insufficient grassland areas, from the society's and economic efficiency's point of view. On the one hand the CAP premium encourage to exploit more crops and less grasslands than what real profit ...
European Grassland Federation, ., European Grassland Federation, Le Goffe, Philippe   +2 more
core  

Food Security Versus Environmental Health: The Nitrogen Dilemma

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Nitrogen is an essential element for plant growth and, consequently, crop production. However, the cycling of nitrogen in the environment can have negative effects. Here, we review the historical development of scientific and public awareness of these effects and the influence this has had on political action to control them.
Henrike Mielenz, Norbert Bischoff, Klaus Butterbach‐Bahl, Uwe Häußermann, Kurt‐Christian Kersebaum, Karin Rather, Burkhard Stever‐Schoo, Reinhard Well, Claas Nendel   +8 more
wiley   +1 more source

Climate Change and Reduction of Soil Organic Layer Thickness Increases Drought Risk in Mountain Forests of the Northern Alps

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background On ca. 10% of the forested sites in the Bavarian Alps (Germany) mountain, forest soils (so‐called folic histosols) are characterized by thick organic layers overlying poorly weathered calcareous parent material. Aim These organic layers play a critical role in releasing water and nutrients for vegetation, yet they are also sensitive
Marc Kühnbach, Axel Wellpott, Rupert Seidl, Hans‐Joachim Klemmt, Klaas Wellhausen, Jörg Ewald   +5 more
wiley   +1 more source

Carbon isotope geochemistry of organic matter in volcanic paleosols constrains paleo‐environmental variations

Journal of Quaternary Science, EarlyView.
ABSTRACT The Fiorano quarry paleosol developed within the Colli Albani volcanic district (Italy) in the time interval bracketed by the deposition of the Pozzolanelle pyroclastic‐flow unit (365 ± 4 ka) and the emplacement of the Capo di Bove lava flow (277 ± 2 ka).
Eduardo Di Marcantonio, Luca Aldega, Luigi Dallai, Mario Gaeta, Fabrizio Marra   +4 more
wiley   +1 more source

Grassland management, soil biota and ecosystem services in sandy soils [PDF]

, 2010
Recent legislative restrictions on the use of fertilizers and irrigation, and a quest for sustainable farming systems have drawn renewed attention to the functioning of the soil and the ecosystem services it provides. Soil biota play an important role in
van Eekeren, N.J.M., Eekeren, N. van, Eekeren, N.J.M., van   +2 more
core  

Spatiotemporal Characteristics and Driving Factors of the Energy Carbon Footprint and Vegetation Carbon Carrying Capacity in China

Energies
This study systematically quantified the carbon footprint generated by China’s consumption of eight major fossil energy sources (coal, coke, crude oil, petrol, kerosene, diesel, fuel oil, and natural gas), alongside the carbon carrying capacity of four ...
Shiqi Du, Chao Gao, Yi He, Miaomiao Zhao, Wei Han, Yue Zhang, Jingang Huang, Huanxuan Li, Xiaobin Xu, Pingzhi Hou   +9 more
doaj   +1 more source

Burrow use by Saharan striped polecat (Poecilictis libyca) in an agricultural area of central Tunisia

The Journal of Wildlife Management, EarlyView.
Saharan striped polecats in agricultural landscapes use many burrows (30–35 per season), facilitated by sandy soils. Burrow sharing is rare and mainly occurs between males and females during mating. Habitat use shifts seasonally, reflecting disturbance and soil conditions. Maintaining stable sandy habitats may be critical for persistence.
Firas Hayder, Zimkitha J. K. Madikiza, Emmanuel Do Linh San   +2 more
wiley   +1 more source

Identifying areas of homogeneous grassland management based on iterative segmentation of Sentinel-1 and Sentinel-2 data

, 2021
Remote sensing data in combination with image segmentation approaches have been shown to be valuable for identifying homogeneous areas such as agricultural land parcels.
Wesemeyer, M., Hostert, P., Schwieder, Marcel, Pickert, J.   +3 more
core  

Estimation of grassland aboveground biomass in northern China based on topography-climate-remote sensing data

Ecological Indicators
Accurately assessing grassland aboveground biomass (AGB) over large areas is essential for the conservation of grassland resource and the improvement of ecological environment.
Yuwei Yao, Hongrui Ren
doaj   +1 more source