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Effects of mammalian herbivore declines on plant communities: observations and experiments in an African savanna
abiotic gradients, community structure, East Africa
2015/11/13
In this study, we examined the interactive roles of soil,
rainfall and livestock in modulating the response of local
plant communities to large wildlife declines. We investigated
these interactions...
MONITORING PHENOLOGICAL VARIABILITY ACROSS A TROPICAL SAVANNA ARIDITY GRADIENT WITH REMOTE SENSING ACROSS SEASONAL TO ANNUALAND EXTREME EVENTS
Savannas MODIS VI Tower fluxes
2014/5/6
Tropical savannas are key components of the global carbon and water cycles and understanding their functioning is critical to understanding ecosystem feedbacks to global climate. By observing broad sc...
Global fire emissions and the contribution of deforestation, savanna, forest, agricultural, and peat fires (1997–2009)
Global fire deforestation savanna forest agricultural peat fires
2010/12/28
New burned area datasets and top-down constraints from atmospheric concentration measurements of pyrogenic gases have decreased the large uncertainty in fire emissions estimates. However, significant ...
Western equatorial African forest-savanna mosaics：a legacy of late Holocene climatic change?
forest-savanna environmental changes late Holocene climatic
2009/12/3
Past vegetation and climate changes reconstructed using two pollen records from Lakes Maridor and Nguène, located in the coastal savannas and inland rainforest of Gabon, respectively, provide new insi...
Long term precipitation chemistry and wet deposition in a remote dry savanna site in Africa （Niger）
precipitation chemistry wet deposition remote dry savanna site Africa
2009/3/13
Long-term precipitation chemistry have been recorded in the rural area of Banizoumbou (Niger), representative of a semi-arid savanna ecosystem. A total of 305 rainfall samples ~90% of the total annual...
Drivers of inter-annual variability in Net Ecosystem Exchange in a semi-arid savanna ecosystem,South Africa
inter-annual variability Net Ecosystem Exchange semi-arid savanna ecosystem
2010/1/19
Inter-annual variability in primary production and ecosystem respiration was explored using eddy-covariance data at a semi-arid savanna site in the Kruger Park, South Africa. New methods of extrapolat...
New insights in the global cycle of acetonitrile: release from theocean and dry deposition in the tropical savanna of Venezuela
global cycle of acetonitrile dry deposition tropical savanna of Venezuela
2009/2/20
Using the proton transfer reaction mass spectrometry (PTR-MS) technique, acetonitrile was measured during the wet season in a Venezuelan woodland savanna. The site was located downwind of the Caribbea...
Evaluation of satellite based indices for gross primary production estimates in a sparse savanna in the Sudan
Evaluation satellite based indices gross primary production sparse savanna
2010/1/19
One of the more frequently applied methods for integrating controls on primary production through satellite data is the Light Use Efficiency (LUE) approach. Satellite indices such as the Normalized Di...
Methane emission from tropical savanna Trachypogon sp. grasses
Methane emission tropical savanna Trachypogon sp. grasses
2009/1/20
Methane flux measurements from the soil-grass system were made during the wet season in unperturbed plots and plots where standing dry and green Trachypogon sp. grasses were clipped to just above the ...
Response of carbon fluxes to water relations in a savanna ecosystem in South Africa
Response carbon fluxes water relations savanna ecosystem South Africa
2010/1/18
The principal mechanisms that connect carbon fluxes with water relations in savanna ecosystems were studied by using eddy covariance method in a savanna ecosystem at Kruger National Park, South Africa...
Soil biogenic emissions of nitric oxide from a semi-arid savanna in South Africa
Soil biogenic emissions nitric oxide semi-arid savanna South Africa
2010/1/18
Soils of arid and semi-arid ecosystems are important biogenic sources of atmospheric nitric oxide (NO), however, there is still a shortage of measurements from these systems. Here we present the resul...
ESTIMATING CANOPY COVER FROM EUCALYPT DOMINANT TROPICAL SAVANNA USING THE EXTRACTION OF TREE CROWNS FROM VERY HIGH RESOLUTION IMAGERY.
canopy cover object-based image segmentation tree crowns northern Australia tropical savanna
2015/11/16
Very high spatial resolution satellite imagery provides data that enables spatially detailed analysis of landscapes. The identification
and extraction of information about tree crowns is one such us...