caa a22 4500 469096012 CHVBK 20180323133031.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00317465 doi (NATIONALLICENCE)springer-10.1007/BF00317465 Titus John Department of Biological Sciences, State University of New York, 13902, Binghamton, NY, USA aut Submersed macrophyte growth at low pH [Elektronische Daten] II. CO2 × sediment interactions [John Titus] The submersed macrophyte Vallisneria americana was grown for seven weeks in a greenhouse to test for differences in the ability of three different sediments to support growth stimulation in response to CO2 enrichment at low pH. Plants accumulated 21- to 24-fold greater biomass at 10 × ambient CO2 concentrations than at ambient CO2 on all sediments. At both CO2 levels, plants grown on sediment from an acidified lake accumulated ca. 81%, and those grown on oligotrophic lake sediment ca. 47% as much biomass as plants grown on alkaline lake sediment. Despite striking CO2 and sediment effects on biomass accumulation, there was no significant interaction (using log-transformed data) between CO2 and sediment effects, indicating that all sediments allowed similar proportionate growth responses to CO2 enrichment. Plants grown on the less fertile sediments showed greater relative allocation to horizontal versus vertical growth by producing more rosette-bearing stolons in relation to plant height (leaf length) than plants grown on relatively fertile, alkaline lake sediment. Tissue analysis suggested that sediment effects on Vallisneria growth could be attributed neither to mineral putrient (nitrogen and phosphorus) limitation nor to aluminum toxicity in these low pH treatments. In any case, CO2 availability can be an important regulator of submersed macrophyte growth at low pH on a variety of sediment types, including those from oligotrophic and acidic lakes. Springer-Verlag, 1992 Submersed macrophyte nationallicence Low pH nationallicence CO2 enrichment nationallicence Sediment nationallicence Growth nationallicence Oecologia Springer-Verlag 92/3(1992-12-01), 391-398 0029-8549 92:3<391 1992 92 442 https://doi.org/10.1007/BF00317465 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317465 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Titus John Department of Biological Sciences, State University of New York, 13902, Binghamton, NY, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/3(1992-12-01), 391-398 0029-8549 92:3<391 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer