Advances in Ecological Research, Vol. 18 by M. Begon, A.H. Fitter, E.D. Ford, A. Macfadyen (Eds.)

By M. Begon, A.H. Fitter, E.D. Ford, A. Macfadyen (Eds.)

Advances in Ecological learn , first released in 1962, is one among educational Press's so much profitable and prestigious sequence. In 1999, the Institute for clinical info published figures exhibiting that the serial has an effect issue of 9.6, with a part lifetime of 10.0 years, putting it 1st within the hugely aggressive type of Ecology. The Editors have consistently striven to supply a variety of top of the line papers on all features of ecology, reminiscent of animal/plant, physiology/population/community, panorama and surroundings ecology. Eclectic volumes within the serial are supplemented via thematic volumes on such issues as Estuaries and old Lakes . Now edited by means of Dr Hal Caswell, of Woods gap Oceanographic establishment, Advances in Ecological examine keeps to submit topical and significant reports, reading ecology as commonly as long ago, to incorporate all fabric that contributes to our realizing of the sphere.

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Although the time period for induction may vary somewhat between species, the induction requirement for maximum photosynthetic rates is an intrinsic feature of photosynthesis in all plants (Rabinowitch, 1956; Walker, 1981). 3 0 1 -- u) O t -50 I I b 250 550 Time (s) 850 Fig. 4. The time course of photosynthetic induction in Alocasia macrorrhiza grown in low light. (a) Induction during a step-change in photon flux density from 10 to 400 pmol m-* s - I (b) Induction during 60-s lightflecks (400 pmol m-2 s-I) separated by 2 min of low light (10 p o l m - 2 s-l).

1983). C. Constraints on Sunfleck Utilization in Understorey Habitats Photosynthetic utilization of sunflecks may be constrained by a variety of factors including loss of induction during low-light periods, restricted stomatal opening to conserve water, photoinhibition, wilting, and high leaf temperatures during prolonged high-light periods. Under field conditions, photosynthesis is influenced by a combination of environmental factors, of which PFD is only one. We are far from understanding how these different environmental factors affect carbon gain during sunflecks and during the intervening low-light periods.

Complete induction loss required over 60 min of exposure to constant low light. The rate of induction loss in high-light grown leaves of Toona australis was considerably faster (Chazdon and Pearcy, 1986a). 2. Photosynthetic Dynamics and Carbon Gain During Sunjlecks Few studies have examined photosynthetic dynamics of forest understorey species. Because of the difficulties in making accurate, rapid measurements and in carefully controlling and replicating experimental conditions, most of these studies have been carried out under laboratory conditions.

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