Dipòsit Digital de Documents de la UAB 4 registres trobats  La cerca s'ha fet en 0.04 segons. 
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A remotely sensed pigment index reveals photosynthetic phenology in evergreen conifers / Gamon, John A. (University of Nebraska-Lincoln. Center for Advanced Land Management Information Technologies.) ; Huemmrich, K. Fred (Goddard Space Flight Center) ; Wong, Christopher Y.S. (University of Toronto. Department of Biology) ; Ensminger, Ingo (University of Toronto. Department of Biology) ; Garrity, Steven (Decagon Devices, Inc.) ; Hollinger, David Y. (United States. Forest Service. Northern Research Station) ; Noormets, Asko (North Carolina State University. Departament of Forestry and Environmental Resources) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
In evergreen conifers, where the foliage amount changes little with season, accurate detection of the underlying “photosynthetic phenology” from satellite remote sensing has been difficult, presenting challenges for global models of ecosystem carbon uptake. [...]
2016 - 10.1073/pnas.1606162113
Proceedings of the National Academy of Sciences, Vol. 113, Issue 46 (November 2016) , p. 13087-13092  
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43 p, 2.3 MB Species interactions slow warming-induced upward shifts of treelines on the Tibetan Plateau / Liang, Eryuan (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Wang, Yafeng (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Piao, Shilong (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Lu, Xiaoming (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Camarero, Jesús Julio (Consejo Superior de Investigaciones Científicas (España). Instituto Pirenaico de Ecología) ; Zhu, Haifeng (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Zhu, Liping (Zhongguo ke xue yuan. Institute of Tibetan Plateau Research) ; Ellison, Aaron M. (Harvard Forest) ; Philippe Ciais (Laboratoire des Sciences du Climat et de l’Environnement) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
The alpine treeline is commonly regarded as being sensitive to climatic warming because regeneration and growth of trees at treeline generally are limited by low temperature. The alpine treelines of the Tibetan Plateau (TP) occur at the highest elevations (4,900 m above sea level) in the Northern Hemisphere. [...]
2016 - 10.1073/pnas.1520582113
Proceedings of the National Academy of Sciences, Vol. 113, no. 16 (April 2016) , p. 4380–4385  
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18 p, 4.9 MB Slow life history and physiological plasticity : survival strategies of a large mammal in a resource-poor environment / Köhler, Meike (Institut Català de Paleontologia Miquel Crusafont) ; Moyà Solà, Salvador (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Because of their physiological and life history characteristics, mammals exploit adaptive zones unavailable to ectothermic reptiles. Yet, they perform best in energyrich environments because their high and constant growth rates and their sustained levels of resting metabolism require continuous resource supply. [...]
2009 - 10.1073/pnas.0813385106
PNAS. Proceedings of the National Academy of Sciences of the United States of America, Vol. 106, Núm. 48 (2009) , p. 1-18  
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27 p, 114.0 KB Maternal ethnobotanical knowledge is associated with multiple measures of child health in the Bolivian Amazon / McDade, T.W. (Northwestern University. Institute for Policy Research. The Center on Social Disparities) ; Reyes García, Victòria (Institució Catalana de Recerca i Estudis Avançats) ; Blackinton, P. (Northwestern University. Department of Anthropology) ; Tanner, S. (University of Georgia. Department of Anthropology) ; Huanca, T. (Brandeis University. Sustainable International Development Program. Heller School for Social Policy and Management) ; Leonard, W.R. (Northwestern University. Department of Anthropology)
Culture is a critical determinant of human behavior and health, and the intergenerational transmission of knowledge regarding the use of available plant resources has historically been an essential function of culture. [...]
2007 - 10.1073/pnas.0609123104
Proceedings of the National Academy of Sciences of The United States of America (PNAS), Vol. 104, Núm. 15 (2007) , p. 6134-6139  

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