نتایج جستجو برای: vegetation dynamics

تعداد نتایج: 482770  

Journal: :Computer Research and Modeling 2020

Journal: :Environments 2022

A set of climatic events that have occurred throughout the Paleolithic ages and all way up to present day led profound changes in biosphere, such as periods glaciation global warming [...]

Journal: :Remote Sensing 2017
Charlotte Wirion Willy Bauwens Boud Verbeiren

A major challenge in hydrologic modeling remains the mapping of vegetation dynamics in an urban landscape. The impact of vegetation on interception storage varies over time and needs to be quantified in order to enable proper management of water resources in urban areas. However, the heterogeneity and complexity of the urban landscape makes it challenging to monitor urban vegetation. A more det...

2008
Valeriy Y. Ivanov Rafael L. Bras Enrique R. Vivoni

[1] Vegetation, particularly its dynamics, is the often-ignored linchpin of the land-surface hydrology. This work emphasizes the coupled nature of vegetation-water-energy dynamics by considering linkages at timescales that vary from hourly to interannual. A series of two papers is presented. A dynamic ecohydrological model [tRIBS + VEGGIE] is described in this paper. It reproduces essential wat...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Rachid Cheddadi Jacques-Louis de Beaulieu Jean Jouzel Valérie Andrieu-Ponel Jeanne-Marine Laurent Maurice Reille Dominique Raynaud Avner Bar-Hen

The Velay sequence (France) provides a unique, continuous, palynological record spanning the last four climatic cycles. A pollen-based reconstruction of temperature and precipitation displays marked climatic cycles. An analysis of the climate and vegetation changes during the interglacial periods reveals comparable features and identical major vegetation successions. Although Marine Isotope Sta...

Journal: :Complex Systems 2008
Brian Beckage Christopher D. Ellingwood

Positive feedbacks between vegetation and fire disturbance may lead to nonlinear ecosystem responses to variation in fire regime. We used a cellular automaton model of fire|vegetation dynamics based on pine savanna communities to explore the potential for fire|vegetation feedbacks to lead to ecological thresholds and abrupt transitions between alternate ecosystem states. We show that (i) ecosys...

Journal: :Remote Sensing 2014
Guang Xu Huifang Zhang Baozhang Chen Hairong Zhang John L. Innes Guangyu Wang Jianwu Yan Yonghong Zheng Zaichun Zhu Ranga B. Myneni

Understanding how the dynamics of vegetation growth respond to climate change at different temporal and spatial scales is critical to projecting future ecosystem dynamics and the adaptation of ecosystems to global change. In this study, we investigated vegetated growth dynamics (annual productivity, seasonality and the minimum amount of vegetated cover) in China and their relations with climati...

Journal: :Remote Sensing 2016
Felix Ndayisaba Hao Guo Anming Bao Hui Guo Fidele Karamage Alphonse Kayiranga

Knowledge of current vegetation dynamics and an ability to make accurate predictions of ecological changes are essential for minimizing food scarcity in developing countries. Vegetation trends are also closely related to sustainability issues, such as management of conservation areas and wildlife habitats. In this study, AVHRR and MODIS NDVI datasets have been used to assess the spatial tempora...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
B R Scanlon D G Levitt R C Reedy K E Keese M J Sully

The impact of climate variability on the water cycle in desert ecosystems is controlled by biospheric feedback at interannual to millennial timescales. This paper describes a unique field dataset from weighing lysimeters beneath nonvegetated and vegetated systems that unequivocally demonstrates the role of vegetation dynamics in controlling water cycle response to interannual climate variabilit...

2017
Rajchandar Padmanaban Avit K. Bhowmik Pedro Cabral

Mining for resources extraction may lead to several geological and associated environmental changes due to ground movements, collision with mining cavities and deformation of aquifers. Geological changes may continue in a reclaimed mine area, and the deformed aquifers may entail a breakdown of substrates and an increase in ground water tables, which may cause surface area inundation. Consequent...

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