The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Examination of published experimental data showed that nutrient addition can sometimes inhibit growth rate of natural algal communities. Such reductions in algal growth might be due to toxic effects of some enrichments. This hypothesis could not however explain inhibitions following moderate additions of nitrate and phosphate. A new hypothesis is proposed to account for such “unexplained” results...
In an attempt to follow algal senescence and grazing, some authors have used HPLC fluorescence detection of chlorophyll a breakdown products. Laboratory grazing experiments have shown that copepods reduce chlorophyll a from diatoms leading to an increase in pheophytin a rather than pheophorbidea . However, field measurements only indicated a slight increase of pheopigment concentrations in summer...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.