Limnology and Oceanography 

About: Limnology and Oceanography is an academic journal published by Wiley-Blackwell. The journal publishes majorly in the area(s): Phytoplankton & Dissolved organic carbon. It has an ISSN identifier of 0024-3590. Over the lifetime, 11222 publications have been published receiving 917692 citations. The journal is also known as: Limnology & oceanography & L and o on cd-rom.

The use of DAPI for identifying and counting aquatic microflora1

Abstract: A highly specific and sensitive fluorescing DNA stain, 4′6-diamidino-2-phenylindole (DAPI) was compared with acridine orange (AO) for counting aquatic microflora. Use of DAPI improved visualization and counting of <1-µm bacteria and blue-green algae in seston-rich samples and extended sample storage to at least 24 weeks.

A trophic state index for lakes1

Abstract: A numerical trophic state index for lakes has been developed that incorporates most lakes in a scale of 0 to 100. Each major division ( 10, 20, 30, etc. ) represents a doubling in algal biomass. The index number can bc calculated from any of several parameters, including Secchi disk transparency, chlorophyll, and total phosphorus. My purpose here is to present a new approach to the trophic classification of lakes. This new approach was developed because of frustration in communicating to the public both the current nature or status of lakes and their future condition after restoration when the traditional trophic classification system is used. The system presented hcrc, termed a trophic state index (TSI), involves new methods both of defining trophic status and of determining that status in lakes. All trophic classification is based on the division of the trophic continuum, howcvcr this is defined, into a series of classes termed trophic states. Traditional systems divide the continuum into three classes: oligotrophic, mesotrophic, and cutrophic. There is often no clear delineation of these divisions. Determinations of trophic state are made from examination of several diverse criteria, such as shape of the oxygen curve, species composition of the bottom fauna or of the phytoplankton, conccntrations of nutrients, and various measures of biomass or production. Although each changes from oligotrophy to eutrophy, the changes do not occur at sharply defined places, nor do they all occur at the same place or at the same rate. Some lakes may be considered oligotrophic by one criterion and eutrophic by another; this problem is

Spectrophotometric determination of hydrogen sulfide in natural waters1

Abstract: Winkler method for dissolved oxygen analysis. Limnol. Oceanog., 10: 135-140. CARRITT, D. E., AND J. H. CARPENTER. 1966. Comparison and evaluation of currently employed modifications of the Winkler method for determining dissolved oxygen in seawater; a NASCO report. J. Marine Res., 24: 286318. CLINE, J. D. 1968. Kinetics of the sulfide-oxygen reaction in seawater; An investigation at constant temperature and salinity. M.S. Thesis, Univ. Washington, Seattle. 68 p. CUSTER, J. J., AND S. NATELSO?\T. 1949. Spectrophotometric determination of microquantities of iodine. Anal. Chem., 21: 1005-1009. THOMPSON, T. G., AND R. J. ROBINSON. 1939. Notes on the determination of dissolved oxygen in sea water. J. Marine Res., 2: 1-8. WHEATLAND, A. B., AND L. J. SMITH. 1955. Gasometric determination of dissolved oxygen in pure and saline water as a check of titrimetric methods. J. Appl. Chem. (London), 5: 144-148. WINKLER, L. W. 1888. Die Bestimmung des im Wasser gelosten Sauerstoffes. Chem. Ber., 21: 2843-2855.