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Overgrazing, climate changes, and drainage are the important disturbances and critical environmental problems for Zoig刈 alpine meadow. These factors play an important role in regulating the soil nitrogen ( N) cycle and to some extent influence alpine meadow ecosystem structure and function. In this study, we investigated the effect of grazing intensity on

As one of the most widespread forest types, China忆s plantation plays an important role in global carbon balance. It is crucial to reduce the uncertainties in the estimation of carbon and water fluxes of plantation ecosystems, and model鄄data fusion technique provides an effective way. The purpose of this research is to improve the modeling accuracy of SIPNET model, the simplified Photosynthesis and Evapo鄄Transpiration(ET) model through two experiments, namely NEE alone and NEE & ET multi鄄constraints. The model鄄data fusion method used here is a combination of Metropolis鄄Hastings algorithm and Simulated Annealing algorithm. Based on eddy fluxes and meteorological observation data of Qianyanzhou subtropical coniferous plantation during 2004-2009 in ChinaFLUX (Chinese Terrestrial Ecosystem Flux Research Network) , we estimated the key parameters of SIPNET model and simulated the corresponding carbon and water fluxes. Comparisons

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