… each annual tree ring has its origin in the CO 2 of air, and O and H come from soil water and
… exchange with xylem water, which will push δD of tree rings back towards that of the source …

… Thus, combined analyses of carbon and oxygen isotopes in tree rings is probably the best
way to investigate changes in tree physiological responses (McCarroll and Loader 2004, …

… We aimed to gain knowledge on the changes in intrinsic water use efficiency (iWUE) in
response to increasing atmospheric CO 2 concentrations and climate change over the last …

… Tree rings The synchronous occurrence of pointer years, ie, very narrow and very wide tree
rings, in both species indicates that tree rings … , tree-ring growth is mainly limited by soil water …

… In this paper, we evaluate interspecific differences in intrinsic water use efficiency (WUE i )
… We used δ 13 C in rings to assess inter-annual changes in WUE i while the influence of the …

… reported increases in intrinsic water use efficiency based on δ 13 C measurements in tree
… rings are formed annually, we provide a review of 130 studies on tree rings in tropical trees (…

… The RGWCD monitors wells and water use, funds studies for water quality and other
environmental issues, and is involved in outreach and education efforts. It takes a leadership role in …

… CO 2 concentrations, increasing water-use efficiency (WUE) … Here we use time series of tree
ring (Pinus sylvestris L.) δ 13 … records of changes in intrinsic water-use efficiency (iWUE) and …

… However, our results support only in part the prediction that tree ring cellulose δ 18 O will
necessarily increase with aridity, because significant correlations between drought index and …

… Scholarly output of the subject area published as derived from a search for (“tree rings” AND
“carbon isotopes” AND “water-use efficiency”) in the title, abstract, or keywords of scientific …