Results 21 to 30 of about 517,089 (299)

Potential net primary productivity in South America: application of a global model [PDF]

open access: yes, 1991
We use a mechanistically based ecosystem simulation model to describe and analyze the spatial and temporal patterns of terrestrial net primary productivity (NPP) in South America.
Kicklighter, David W.   +8 more
core   +2 more sources

Climatic change controls productivity variation in global grasslands. [PDF]

open access: yes, 2016
Detection and identification of the impacts of climate change on ecosystems have been core issues in climate change research in recent years. In this study, we compared average annual values of the normalized difference vegetation index (NDVI) with ...
Ganjurjav, Hasbagan   +8 more
core   +1 more source

Human Appropriated Net Primary Productivity of Complex Mosaic Landscapes

open access: yesFrontiers in Forests and Global Change, 2019
Quantifying human impact on the environment is increasingly important and particularly so in complex mosaic landscapes. Such landscapes are prolific in the developing world, notably in West African, small holder cocoa farming communities.
Christine Moore   +6 more
doaj   +1 more source

Photosynthesis and net primary productivity in three Antarctic diatoms: Possible significance for their distribution in the Antarctic marine ecosystem [PDF]

open access: yes, 2011
Photosynthesis and net primary productivity were measured in 3 Antarctic diatoms, Fragilariopsis cylindrus, Pseudo-nitzschia subcurvata and Chaetoceros sp., exposed to rapid changes in temperature and salinity representing a range of conditions found ...
Petrou, K, Ralph, PJ
core   +2 more sources

Net primary production of forests: a constant fraction of gross primary production? [PDF]

open access: yesTree Physiology, 1998
Considerable progress has been made in our ability to model and measure annual gross primary production (GPP) by terrestrial vegetation. But challenges remain in estimating maintenance respiration (R(m)) and net primary production (NPP). To search for possible common relationships, we assembled annual carbon budgets from six evergreen and one deciduous
R. H., Waring   +2 more
openaire   +2 more sources

Ecohydrological Controls on Grass and Shrub Above-ground Net Primary Productivity in a Seasonally Dry Climate [PDF]

open access: yes, 2015
Seasonally dry, water‐limited regions are often co‐dominated by distinct herbaceous and woody plant communities with contrasting ecohydrological properties.
Bras, Rafael L.   +2 more
core   +2 more sources

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

Maps measure net primary production [PDF]

open access: yesEos, Transactions American Geophysical Union, 2003
New maps of Earth's net primary production are the first consistent and continuous global measurements of the rate that plant life absorbs carbon from the atmosphere, NASA announced on 23 April.The maps incorporate measurements of plant properties collected by the Moderate Resolution Imaging Spectroradiometer, or MODIS, with other satellite‐ and ...
openaire   +1 more source

Crop Yield Estimation in the Canadian Prairies Using Terra/MODIS-Derived Crop Metrics

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
We evaluated the utility of Terra/MODIS-derived crop metrics for yield estimation across the Canadian Prairies. This study was undertaken at the Census Agriculture Region (CAR) and the Rural Municipality (RM) of the province of Saskatchewan, in three ...
Jiangui Liu   +7 more
doaj   +1 more source

Quantitative Assessment of Factors Influencing the Spatiotemporal Variation in Carbon Dioxide Fluxes Simulated by Multi-Source Remote Sensing Data in Tropical Vegetation

open access: yesRemote Sensing, 2023
Vegetation plays a vital role in the global carbon cycle, a function of particular significance in regulating carbon dioxide fluxes within tropical ecosystems.
Ruize Xu   +4 more
doaj   +1 more source

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