Dr. Shabtai Cohen, Israel

Dr. Shabtai Cohen, IsraelShabtai (or Shep) Cohen is a senior research scientist in the Dept. of Environmental Physics and Irrigation at the Institute of Soil, Water and Environmental Sciences, ARO Volcani Center for Agricultural research in Israel. His research covers a wide range of topics, most of which are related to the movement of water through trees and into the atmosphere. These include radiation balance of agricultural crops and forests, changes in climate due to anthropogenic influences and their impact on plant water relations, and measurement of LAI and sap flow. In recent years he has become increasingly interested in hydraulic limits of plants and the influence of xylem structure on water transport.

Shep was born in the USA and moved to Israel after his first degree to continue his studies at the Hebrew University of Jerusalem, where he obtained his PhD. His talk will include insights from a recent sabbatical at the Holbrook lab in Harvard University, Cambridge, Ma.


Title of talk to be presented

The radial and azimuthal distribution of sap velocity in tree stems – why and can we predict it?



Raz Yaseef, N., Yakir, D., Rotenberg, E., Schiller, G., Cohen, S. (2009). Ecohydrology of a semi-arid forest: partitioning among water balance components and its implications for predicted precipitation changes. Ecohydrology (online). DOI: 10.1002/eco.65

Sprintsin, M., Karnieli, A., Berliner, P., Rotenberg, E., Yakir, D., Cohen, S., (2009). Evaluating the performance of the MODIS Leaf Area Index (LAI) product over a Mediterranean dryland planted forest. International Journal of Remote Sensing 30 (19):5061-5069

Cohen, Y., Cohen, S., Cantuarias Aviles, T. and G. Schiller. (2008). Variations in the radial gradient of sap velocity in trunks of forest and fruit trees. Plant and Soil 305:49-59

Cohen, S., A. Naor, J. Bennink, A. Grava and M. Tyree. (2007). Hydraulic resistance components of mature apple trees on rootstocks of different vigours. Journal of Experimental Botany 58(15-16):4213-4224

Schiller, G., S. Cohen, ED Unger, Y. Moshe, and N. Herr. (2007). Estimating water use by sclerophyllous species under east Mediterranean climate: III. Tabor oak forest sap flow distribution and transpiration. Forest Ecology and Management 238:147-155