Growth and reproductive responses of Laminaria longicruris (Laminariales,Phaeophyta) to nutrient enrichment |
| |
Authors: | Yarish C Penniman C A Egan B |
| |
Institution: | (1) Department of Ecology and Evolutionary Biology, University of Connecticut, 06903 Stamford, CT, USA;(2) Jackson Estuarine Laboratory, University of New Hampshire, 03924 Durham, NH, USA |
| |
Abstract: | A series of comparative culture experiments were conducted in order to determine responses of Laminaria longicruris male and female gametophytes and juvenile sporophytes to several temperatures (5, 10, 15, 20 °C), light levels (10, 35, 75 µmol m–2 s–1) and media nitrogen concentrations (0, 20, 100 µM ammonium-nitrogen). Responses were measured as numbers of male and female gametophytes producing gametangia and number of sporophytes produced following fertilization. Both male and female gametogenesis was reduced at 5 and 20 °C versus 10 and 15 °C. At 20 °C gametogenesis inhibition was greater with higher levels of ammonium-nitrogen concentration (100 µM). Sporophyte production was more sensitive to light, temperature and nitrogen concentration than gametogenesis. Production of sporophytes was inhibited completely at 20 °C. At lower temperatures, increasingly higher nutrient concentrations produced greater inhibition of production of sporophytes. |
| |
Keywords: | growth kelp Laminaria nutrient enrichment reproduction |
本文献已被 SpringerLink 等数据库收录! |
|