جستجوی مقالات مرتبط با کلیدواژه "جلبک سبز" در نشریات گروه "مهندسی دریا"

Biological, chemical and physical factors influence on physiology of aquatic microalgae. Changes in these factors effect and disturb the life cycle of microalgae as well as their physiological parameters.In this study the changes of pH in the culture medium of green algae Scenedesmus quadricauda (Turp.)‌Bréb. In three different culture media under chemical stresses using herbicideMetribuzin and water hardness, was investigated. The experiment was conducted in a completely randomized design for a period of 21 days. Change in acidityof culture media A and B had direct relationship with water hardness and presence of herbicide. Results of pH changes in medium A suggest a direct correlation with the amount of chlorophyll a,‌ b and carotenoid. According to the results of analysis of variance, there are also significant differences (P < 0.05) in some treatments in different media. The greatest amount of carotenoid was observed at 150 mg/L CaCO3. In general, it can be said that the green algae, Scenedesmus quadricauda species, had high tolerance to changes in the acidity of the medium, along with chemical stresses caused by water hardness and presence of herbicide Metribuzin.

In this research, identification and biomass of macroalgae in Jofreh, Naftkesh, Daneshjo, Lian sights in Bushehr Province in winter 1388 (2010) at low, mid and high intertidal zone have been studied. Sampling was done randomly with 0.5 m2 quadrate. Totally 9 genera of green, red and brown macro algae were recognized. Maximum and minimum biomass of algae belonged to brown and green algae with 2166/7and 687g/m2, respectively. The green algae  Codium, sp., Chaetomorpha, sp. , Chatomotpha gracilis and the red algae   Hypnea sp., Gracillaria, sp., Laurencia,sp. , Gracillara corticata, Laurencia papillosa and Laurencia obtuse , also 6 brown algae including Sargassum sp., Padina sp., Colpomenia sp. , Cystoseria sp. ,Colpomenia sinuosa and Cystoseria fimbriata, were recognized. Key words: