caa a22 4500 477110975 CHVBK 20180405111608.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02415515 doi (NATIONALLICENCE)springer-10.1007/BF02415515 Effects of an African grass invasion on Hawaiian shrubland nitrogen biogeochemistry [Elektronische Daten] [Gregory Asner, Susan Beatty] African perennial C4 grasses are highly successful invaders in Hawaiian ecosystems. We examined the effects of African molasses grass (Melinis minutiflora Beauv.) on Hawaiian shrubland nitrogen (N) dynamics without the influence of fire disturbance. Vegetation tissue carbon and nitrogen chemistry, soil inorganic N pools, net N mineralization rates, and total soil N were studied in three adjacent areas: a monospecificMelinis grassland, a mixed grass/shrubland mosaic, and an un-invaded shrubland.Melinis plots within the mosaic area exhibited the largest inorganic N pools and fastest net N mineralization rates, but were temporally variable with grass phenology. Un-invaded shrubland plots contained the smallest inorganic N pools and lowest net N mineralization rates. Grass foliar C:N and litter C:N were lower than those of common shrubland species, providing one possible link between species and ecosystem N dynamics at this site. The combined effects of N cycle modification, successful light competition, and fire-cycle enhancement make the invasion ofMelinis a significant perturbation to Hawaiian shrubland ecosystem function and successional dynamics. ei]Section editor H Lambers Kluwer Academic Publishers, 1996 African grasses nationallicence biological invasions nationallicence ecosystem processes nationallicence Hawaii nationallicence Melinis minutiflora nationallicence nitrogen cycle nationallicence Asner Gregory Department of Geography, University of Colorado, 80309-0260, Boulder, CO, USA aut Beatty Susan Department of Geography, University of Colorado, 80309-0260, Boulder, CO, USA aut Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 205-211 0032-079X 186:2<205 1996 186 11104 https://doi.org/10.1007/BF02415515 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02415515 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Asner Gregory Department of Geography, University of Colorado, 80309-0260, Boulder, CO, USA aut NATIONALLICENCE 700 1- Beatty Susan Department of Geography, University of Colorado, 80309-0260, Boulder, CO, USA aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 205-211 0032-079X 186:2<205 1996 186 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer