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Comparisons of trophic state measurements


, : Comparisons of trophic state measurements. Water Research 17(11): 1619-1626

Methods (29) commonly used to measure trophic state were compared with respect to their ability to rank 44 test lakes against 2 standards: total P, a nutrient or driving force standard and chlorophyll a, a eutrophication response standard. The P loading models had high rank correlations with P, but they did not rank the lakes well against chlorophyll. The relative trophic ranking of many lakes differed depending upon whether primary nutrients or biological manifestations were used as the ranking mechanism. Secchi disk was very effective in ranking the lakes against P but was relatively ineffective in ranking them against chlorophyll. Total Kjeldahl N was effective in ranking the lakes against P and had the highest rank correlation of all the methods tested against chlorophyll. Methods based upon phytoplankton community structure were especially ineffective in ranking the test lakes. Algal assay control yield gave disappointing results when compared against the chlorophyll standard. Most methods were much more effective in ranking the lakes against the total P standard than the chlorophyll a standard.

US$19.90

DOI: 10.1016/0043-1354(83)90020-9


Other references

Kerber, R.E.; Marcus, M.L., 1978: Evaluation of regional myocardial function in ischemic heart disease by echocardiography. Echocardiography can display motion abnormalities of acutely or chronically ischemic myocardium. In experimental studies, this permits the evaluation of the effect on regional dyskinesis of potentially therapeutic interventions. In clinical studie...

Papp, M.; Krasznai, I.; Acs, Z.; Varga, E.; Foeldes, J., 1964: Examination Of The Blood Volume Flowing Through The Pancreas In Experimental Pancreatitis. Orvosi Hetilap 105: 1746-1748

Signoret, J.P., 1977: Chemical communication and reproduction in mammals. A review of the influence of pheromones on reproduction, with particular reference to farm livestock and laboratory mammals.

Mukerji, K.G., 1968: Sphaerotheca macularis.. A description is provided for Sphaerotheca macularis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Humulus lupulus and many other plants, e.g. Fragaria vesca, espe...

Buzsáki, G.; Horváth, Z.; Urioste, R.; Hetke, J.; Wise, K., 1992: High-frequency network oscillation in the hippocampus. Pyramidal cells in the CA1 hippocampal region displayed transient network oscillations (200 hertz) during behavioral immobility, consummatory behaviors, and slow-wave sleep. Simultaneous, multisite recordings revealed temporal and spatial coherenc...

Li, Y.G.; Groenefeld, G.; Hohnloser, S.H., 2001: Reentrant ventricular tachycardia involving a bundle branch with a normal HV interval during sinus rhythm. European Heart Journal 22(Abstract Supplement): 697, September

Demski L.S., 1990: Neuroendocrine mechanisms controlling the sexual development and behavior of sharks and rays. Journal of Aquariculture & Aquatic Sciences 5(3): 53-67

Roden, D.M., 2014: Pharmacology and Toxicology of Nav1.5-Class 1 anti-arrhythmic drugs. Although cardiac sodium channel blocking drugs can exert antiarrhythmic actions, they can also provoke life-threatening arrhythmias through a variety of mechanisms. This review addresses the way in which drugs interact with the channel, and how th...

Oakley, J.R.; Jagelman, D.G.; Fazio, V.W.; Lavery, I.C.; Weakley, F.L.; Easley, K.; Farmer, R.G., 1985: Complications and quality of life after ileorectal anastomosis for ulcerative colitis. Ileorectal anastomosis is a safe operation with low mortality and morbidity and offers a good prospect for success in many patients with ulcerative colitis. The functional results are good in the majority of patients, and there is a high level of...

Anonymous, 1963: The new 1:5,000 subsurface map of the Aachen city area. Nineteen maps have been issued showing lithology, soils, and other properties of engineering geologic significance of the area in and around Aachen (Germany). The maps represent the conditions at a depth of two meters below the surface. Vertical s...