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Short-term effects of enhanced UV-B and CO-2 on lichens at different latitudes


, : Short-term effects of enhanced UV-B and CO-2 on lichens at different latitudes. Lichenologist (London) 27(6): 547-557

Interaction effects of UV-B and CO-2 on three lichens species, Cladonia arbuscula, Cetraria islandica and Stereocaulon pashale, from two latitudinal sites, 68 degree N and 56 degree N, were studied in a laboratory experiment. The response of the plants was recorded by measuring their chlorophyll fluorescence. All species had a similar response to enhanced UV-B depending on the latitude from which the population came and the time of the season when they were sampled. Overall, there was a significant increase in photosystem II yield (as measured by a fluorescence technique) due to UV-B and no separate effect due to enhanced CO-2, although there was a significant interaction between CO-2 and UV-B. The increase due to UV-B was at the low CO-2 level. There were also significant differences in response due to latitude. The results contradict our hypotheses that negative effects of UV-B would be larger in the North than in the South and that a negative response should be especially large during the early season.

US$19.90

DOI: 10.1016/s0024-2829(05)80013-1


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Singla, A.; Sahni, D.; Gupta, A.K.; Loukas, M.; Aggarwal, A., 2014: Surgical anatomy of round window and its implications for cochlear implantation. The objective of this work was to study the morphometry and morphology of the round window (RW) and its relationships with the internal carotid artery, jugular bulb (JB), facial nerve and oval window (OW). Fifty cadaveric temporal bones were micro...

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Williams, R.J.B., 1969: The rapid determination of nitrate in crops, soils, drainage and rainwater by a simple field method using dipheny lamine or diphenylbenzidine with glass fibre paper. In this field method, the blue colour formed when a small piece of fibre-glass paper moistened with a small quantity of plant sap, drainage water, or damp soil is treated with diphenylamine reagent is compared with permanent colour standards in pa...

Singer M.V.; Gyr K.E.; Sarles H., 1986: Revised marseille classification of pancreatitis. Malfertheiner, P And H Ditschuneit (Ed ) Diagnostic Procedures in Pancreatic Disease; Symposium, Ulm, West Germany, Mar 1985 Xiii+331p Springer-Verlag: Berlin, West Germany; New York, N Y , Usa Illus 1-3

Wolfram, G.; Adolph, M.; Eckart, J., 1989: Distribution and elimination of medium - and long-chain fatty acids in the lipoproteins of severely injured patients after bolus injection of a fat emulsion. A fat emulsion containing 20% fat as medium-chain triglycerides (MCT) and long-chain triglycerides (LCT) (1:1) was injected as a bolus with fat 0.2 g/kg body weight to 6 patients, 3 to 5 days after a serious injury. Triglyceride concentrations inc...

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