Plasmatic resistance and rate of respiration and photosynthesis ofZostera marinaat different salinities and temperatures

✍ Scribed by R. Biebl; C. P. McRoy

• Book ID: 104734216
• Publisher: Springer-Verlag
• Year: 1971
• Tongue: English
• Weight: 958 KB
• Volume: 8
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00349344

✦ Synopsis

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 different salinities and temperatures. The plasmatic resistance was found in a range of distilled H20 up to 3.0 seawater (24 h) and between -6 ~ and 34~ (12 h). Within these resistance limits, the photosynthesis, which has its maximum in normal (1.0) seawater, decreases nearly to zero not only in distilled H20 but even in 2.0 seawater, and increases with the temperature in the tidepool form up to 35 ~ but in the subtidal form up to 30 ~ only. At higher temperatures photosynthesis declines sharply in both forms. Respiration has its minimum in distilled tt20 and at 0 ~ and increases with increasing salinity and temperature.