caa a22 4500 469096829 CHVBK 20180323133033.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00317420 doi (NATIONALLICENCE)springer-10.1007/BF00317420 Olff Han Department of Plant Biology, University of Groningen, P.O. Box 14, 9750 AA, Haren (Gn.), The Netherlands aut Effects of light and nutrient availability on dry matter and N allocation in six successional grassland species [Elektronische Daten] Testing for resource ratio effects [Han Olff] Summary: Recent discussions on determinants of competitive success during succession require the study of the combined effect of light and nutrient availability on growth and allocation. These effects can be used to predict the outcome of competition at changing resource availabilities. This work is part of a study on the successional sequence in permanent grassland starting after fertilizer application is stopped, but with continued mowing, in order to restore former species-rich communities. This yields a successional sequence which proceeds from grasslands with a high nutrient availability and a closed canopy, to grasslands with a low nutrient availability and an open canopy. If allocation is related to competitive ability, species from the productive stages would be expected to allocate more biomass and nitrogen to leaves, which could make them better competitors for light, while species from the unproductive stages would allocate more biomass to roots, which could make them better nutrient competitors. This study reports on growth, specific leaf area (SLA), vertical display of leaves, and allocation of biomass and nitrogen of six grassland species from this successional sequence at 16 combinations of light and nutrient supply. Species from the poorer successional stages reached a lower final dry weight than species from the richer stages, over all treatment combinations. The experimental design made it possible to test for unique effects of the resource ratio effect of light and nutrients on allocation characteristics. This resource-ratio effect was defined as the ratio light intensity/(light intensity + nutrient supply rate), using standardized levels for the treatments. The within-species variation (plasticity) in both allocation of dry matter and nitrogen was linearly related to this resource-ratio effect. Some interspecific differences in this relationship were found which could be related to the position of the species along the successional gradient. However, the range of plasticity in allocation pattern expressed within each species was much larger than the differences between species. It was concluded that allocation differences between these grassland species are relatively unimportant, given the large amount of plasticity in these traits. Interspecific differences in SLA and vertical stature seemed to be more important in explaining the position of species along the successional gradient. Springer-Verlag, 1992 Allocation nationallicence Plasticity nationallicence Succession nationallicence Resource ratios nationallicence Oecologia Springer-Verlag 89/3(1992-03-01), 412-421 0029-8549 89:3<412 1992 89 442 https://doi.org/10.1007/BF00317420 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317420 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Olff Han Department of Plant Biology, University of Groningen, P.O. Box 14, 9750 AA, Haren (Gn.), The Netherlands aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 89/3(1992-03-01), 412-421 0029-8549 89:3<412 1992 89 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer