Plasmatic resistance and rate of respiration and photosynthesis of Zostera marina at different salinities and temperatures

摘要: Zostera marina L. was studied at the Izembek Lagoon, Alaska Peninsula. Two morphologically different forms, tidepool and subtidal, can be distinguished. Both show a high tolerance to salinities temperatures. The plasmatic resistance found in range of distilled H2O up 3.0 seawater (24 h) between-6° 34°C (12 h). Within these limits, photosynthesis, which has its maximum normal (1.0) seawater, decreases nearly zero not only but even 2.0 increases with temperature form 35°C, subtidal 30°C only. At higher temperatures photosynthesis declines sharply both forms. Respiration minimum 0°C increasing salinity temperature.