%0 Journal Article %1 Fieldetal_83 %A Field, C. %A Merino, J. %A Mooney, H. A. %D 1983 %J Oecologia %K bibtex-import citeulikeExport %P 384--389 %T Compromises between water-use efficiency and nitrogen-use efficiency in five species of California evergreens %V 60

@article{Fieldetal_83, added-at = {2019-03-31T01:14:40.000+0100}, author = {Field, C. and Merino, J. and Mooney, H. A.}, biburl = {https://www.bibsonomy.org/bibtex/2de8b2c4b8f35819640c76b8a74a0af5b/dianella}, citeulike-article-id = {1523694}, comment = {(private-note)cited by Monson, Russell K. (1986) Field measurements of photosynthesis, water-use efficiency, and growth inAgropyron smithii (C3) and Bouteloua gracilis (C4) in the Colorado shortgrass steppe. Oecologia 68(3) leaf N was a major determinate of photosynthetic capacity within spp A and g corellate well water use efficiency A/Tr was highest in dry-habitat spp In the present study, we emphasize longer-term constraints, factors that limit photosynthesis under controlled conditions approximating the natural conditions that elicit maximum photosynthetic rates. This we define as photosynthetic capacity. We define instantaneous nitrogen-use efficiency (NUE) as the ratio of photosynthetic capacity to leaf nitrogen content and instantaneous water-use efficiency (WUE) as the ratio of photosynthetic capacity to transpiration, both measured under a defined set of controlled conditions. These indices are intended to provide a measure of potential resource-use efficiency and are not meant to describe resource-use efficiency under complex and varying natural conditions. - A scaled linearly with leaf N per gram and per leaf area within spp Between spp as well, but explained less variation - A decreased steadily with leaf age - E scaled linearly with g - A scaled with g within spp, the result being that Ci didn't change consistently with photosynthetic capacity , but between spp, there were three significant groups, high, low and medium Ci. For all these species, the absence of a significant relationship between photosynthetic capacity and ci suggests that, within each species, stomatal effects limited photosynthesis to approximately the same extent. - No significant relationship between specific leaf weight and photosynthetic capacity within spp - over all species NUE and WUE didn't change with leaf age. - Over the five species, NUE varied more than tw0-fold, ranging from 29.5 lamol CO2/(mol N.s) in P. ilicifolia to 66.6 pmol CO2/(mol N's) in A. menziesii. - with one exception, higher WUE meant lower NUE, showing that there's a tradeoff (the cost of a high WUE is a low NUE) - specific leaf weight increased with age (up to 1 year, then plateaued) - under the controlled experimental conditions where c o, leaf temperature, and Aw were fixed, WUE and Ca are related according to Eq. (1). WUE = Ca/((delta)w. 1.56) - Ci/((delta)w. 1.56). (1) The factor of 1.56 corrects for differences in the diffusion properties of CO 2 and H20.}, interhash = {d6a965580d70370281a3600f266fd48c}, intrahash = {de8b2c4b8f35819640c76b8a74a0af5b}, journal = {Oecologia}, keywords = {bibtex-import citeulikeExport}, pages = {384--389}, posted-at = {2007-07-31 06:17:28}, priority = {2}, timestamp = {2019-03-31T01:16:26.000+0100}, title = {{Compromises between water-use efficiency and nitrogen-use efficiency in five species of California evergreens}}, volume = 60, year = 1983 }