http://www.mdpi.com/journal/water/special_issues/water_avail_trees/ Submission All manuscripts should be submitted to water@mdpi.com with a copy to the Guest Editor. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website. Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed Open Access monthly journal published by MDPI. Open Access publication is free of charge for manuscripts submitted in 2009 and 2010, and published in the first few issues of Water. English correction fees and/or formatting fees of 250 CHF will be billed in certain cases (250 CHF per paper for those papers that require extensive additional formatting and/or English corrections). http://www.mdpi.com/2073-4441/1/1/32/ Daily rates of whole tree water use were measured in a homogeneous 7-year-old plantation over 84 days. Two trees were selected in the two most contrasting ends, i.e., with mean water table at -1.5 m and -3.5 m. Results showed that the mean tree water use was close to 80 dm3 day–1 with a small mean difference between the two sites (5.4 dm3 day–1, about 7%). Higher daily variations were observed on a single tree over the season (from 17 to 138 dm3 day–1). These fluctuations could be modeled using linear regressions on the vapor pressure deficit (VPD). Results also indicated decreasing sap flux densities with radial sapwood depth and that the whole tree water use could be estimated from the sap flux densities measured at the 0–2 cm depth. http://www.mdpi.com/2073-4441/1/1/32/ Fri, 06 Nov 2009 00:00:00 CET Water 2009-11-06 1 1 Article 32 42 2073-4441 Daily Variations of Water Use with Vapor Pressure Deficit in a Plantation of I214 Poplars 2009-11-06 doi: 10.3390/w1010032 Etienne Muller Luc Lambs