Results 21 to 30 of about 3,482,440 (295)

Net ecosystem carbon exchange in three contrasting Mediterranean ecosystems – the effect of drought [PDF]

Biogeosciences, 2007
Abstract. Droughts reduce gross primary production (GPP) and ecosystem respiration (Reco), contributing to most of the inter-annual variability in terrestrial carbon sequestration. In seasonally dry climates (Mediterranean), droughts result from reductions in annual rainfall and changes in rain seasonality.
Pereira, J. S., Mateus, J. A., Aires, L. M., Pita, G., Pio, C., David, J. S., Andrade, V., Banza, J., David, T. S., Paço, T. A., Rodrigues, A.   +10 more
openaire   +4 more sources

Modeling of net ecosystem exchange and its components for a humid grassland ecosystem [PDF]

Journal of Geophysical Research: Biogeosciences, 2006
We measured the net ecosystem exchange (NEE) of a managed humid grassland in southwest Ireland from 2002 to 2004 with an eddy covariance (EC) system. In addition, a process‐based biogeochemical model (PaSim) incorporating land management practices such as grazing and grass harvesting was used to simulate the carbon dynamics. The modeled NEE of 2.6, 2.7
Lawton, Delphine, Leahy, Paul, Kiely, Ger, Byrne, Kenneth A., Calanca, Pierluigi   +4 more
openaire   +1 more source

Net ecosystem CO₂ exchange measurements by the closed chamber method and the eddy covariance technique and their dependence on atmospheric conditions [PDF]

Atmospheric Measurement Techniques, 2014
Carbon dioxide flux measurements in ecosystem sciences are mostly conducted by eddy covariance technique or the closed chamber method. But there is a lack of detailed comparisons that assess present differences and uncertainties.
M. Riederer, A. Serafimovich, T. Foken
doaj   +1 more source

Factors controlling and variations of CO2 fluxes during the growing season in Gurbantunggut Desert

Ecological Indicators, 2023
Although previous studies have illustrated the variation of CO2 fluxes in different terrestrial ecosystems, more needs to be reported on desert ecosystems.
Gulnur Amar, Ali Mamtimin, YongHui Wang, Yu Wang, JiaCheng Gao, Fan Yang, Meiqi Song, Ailiyaer Aihaiti, Cong Wen, Junjian Liu   +9 more
doaj   +1 more source

Longer growing seasons do not increase net carbon uptake in Northeastern Siberian tundra [PDF]

, 2011
With global warming, snowmelt is occurring earlier and growing seasons are becoming longer around the Arctic. It has been suggested that this would lead to more uptake of carbon due to a lengthening of the period in which plants photosynthesize.
Dolman, A.J., Parmentier, F.J.W., Suzdalov, D., Maximov, T.C., Molen, M.K., van der, Huissteden, J., van, Karsanaev, S., Kononov, A.V., Kononov, A. V., M. K. van der Molen, S. A. Karsanaev, Parmentier, Frans-Jan,, J. van Huissteden, A. V. Kononov, Suzdalov, D.A., Suzdalov, D. A., van Molen, M.K., van Huissteden, J.; id_orcid, Maximov, T. C., van Huissteden, J., D. A. Suzdalov, Parmentier, Frans-Jan, van der Molen, M. K., Dolman, A. J., F. J. W. Parmentier, Dolman, A.J.; id_orcid, Karsanaev, S. A., Karsanaev, S.A., T. C. Maximov, Lund University., A. J. Dolman   +30 more
core   +1 more source

Effects of Nitrogen Addition on the Drought Susceptibility of the Leymus chinensis Meadow Ecosystem Vary with Drought Duration

Frontiers in Plant Science, 2018
It is not clear yet how extreme drought and nitrogen (N) deposition influence grassland ecosystem functions when they are considered together, especially in complex field conditions.
Baoku Shi, Yunbo Wang, Yunbo Wang, Bo Meng, Shangzhi Zhong, Wei Sun   +5 more
doaj   +1 more source

Effects of water and nitrogen addition on ecosystem carbon exchange in a meadow steppe. [PDF]

PLoS ONE, 2015
A changing precipitation regime and increasing nitrogen deposition are likely to have profound impacts on arid and semiarid ecosystem C cycling, which is often constrained by the timing and availability of water and nitrogen.
Yunbo Wang, Qi Jiang, Zhiming Yang, Wei Sun, Deli Wang   +4 more
doaj   +1 more source

Seasonality in CO2 and H2O flux at an Eastern Amazonian Rain Forest [PDF]

, 2002
Previous studies of CO2 fluxes in Amazonia have suggested seasonal variation in net ecosystem exchange. We find little evidence of this seasonality at a new site in eastern Amazonia, despite the expectation that this site would be particularly sensitive ...
Palheta, P., Grace, J., Costa, J. M. N., Clement, R. J., Meir, P., Costa, J. de P. R., Ruivo, M. de L., Costa, A. L., Malhi, Y., Leal, L. do S. M., Carswell, F. E.   +10 more
core   +1 more source

Data for: Net Ecosystem Carbon Exchange Prediction and Analysis based on Gradient Boosting Regression and Random Forest

, 2021
Data for paper Net Ecosystem Carbon Exchange Prediction and Analysis based on Gradient Boosting Regression and Random ...
Cai, Jianchao, Cai, J (via Mendeley Data)   +1 more
core   +2 more sources

Experimental climate change in desert steppe reveals the importance of C4 plants for ecosystem carbon exchange

Ecological Indicators, 2023
Global climate change has greatly altered plant community composition and affected ecosystem carbon exchange of grasslands. However, the influences of long-term increasing temperature and precipitation on the composition of plant community and the ...
Guangyi Lv, Mengting He, Qi Li, Zhanyi Wang, Chengjie Wang   +4 more
doaj   +1 more source