a Record control number 000299536700098

a ISSN 1877-0428

a Original cataloging agency NEU GrandLibrary

a Language code of text/sound track or separate title eng

a Classification number G63

b Item number .E26 2011

a Personal name Karam, Fadi.

a Title Eco - physiological behaviour of two woody oak species to combat desertification in the east Mediterranean-a case study from Lebanon.

h Medium Electronic Document

c Statement of responsibility, etc Fadi Karama, Andreas Doulisb, Munir Ozturkc, Yunus Dogand, Serdal Sakcali.

c Date of publication, distribution, etc 2011.

b Name of publisher, distributor, etc Elsevier,

a Place of publication, distribution, etc Amsterdam :

a Summary, etc The Millennium Ecosystem Assessment scenarios as well as other global assessments have revealed that factors like climate change, land use changes, biotic interferences and atmospheric CO2 will be the major drivers of future biodiversity loss. This loss is important because it will lead to a loss of valuable genetic diversity as well, which is of paramount importance for well being of humans. The local species losses and extinctions are expected to take place at an even faster rate, which will directly affect local ecosystem functioning. However, the land-use change may play a more dominating role in the species loss at the global level during next 5 decades. This loss can vary between 7-25 percent depending on different biomes. Due to her existence in the Mediterranean Basin Lebanon is among one of the countires which has been severely suffering from changes in the land use and desertification, and will be affected much in future. Attempts should thus be made for obtaining detailed projections for the country. One of the ways to be followed is monitoring the efficiency of water use. Therefore in this study adaptation strategies of two typical woody oak species Quercus infectoria; a deciduous species; and Q. calliprinos; an evergreen species; to drought prone environments was studied in two different sites in Lebanon with high and low rainfall, during spring and autumn seasons. The water relations and photosynthetic behaviour of these species were investigated by conducting experiments in the field in order to assess their ecophysiological responses to water stress caused by increased drought. The leaves of Q. infectoria were bright green and larger than leaves of Q. calliprinos, allowing higher rates of photosynthesis and transpiration, but also resulting in low water use efficiency, regardless of site and season. Water stress reduced the rates of photosynthesis and transpiration in the course of the drying period in correspondence with an increase in vapour pressure deficit. The recovery of these two parameters in the autumn was correlated with a lowering of the air temperature and the saturation deficit of the atmosphere, for the same range of intercepted PAR. In all seasons, a mid-day depression in the photosynthesis and transpiration curves was due to stomata closure in response to water stress during the hottest hours of the day. These results are expected to enlighten the possibilities for future reclamation of degraded areas in the country. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Recep Efe and Munir Ozturk

a Topical term or geographic name as entry element Near East University Article

a Topical term or geographic name as entry element Yakın Doğu Üniversitesi Makale

a Topical term or geographic name as entry element Geography

a Topical term or geographic name as entry element Drought

a Topical term or geographic name as entry element Transpiration

g Relationship information 2011, Vol 19, p787-796

t Title 2nd International Geography Symposium-Mediterranean Environment 2010

t Title Procedia Social and Behavioral Sciences

x International Standard Serial Number 18770428

u Uniform Resource Identifier http://library.neu.edu.tr:2048/login?url=http://dx.doi.org/10.1016/j.sbspro.2011.05.197