Textbook of Limnology |
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Page 113
... light passing through various thicknesses of an absorb- ing medium . When a parallel beam of monochromatic light enters chemically pure water , for example , it is absorbed exponentially ; the absorption varies di- rectly with the ...
... light passing through various thicknesses of an absorb- ing medium . When a parallel beam of monochromatic light enters chemically pure water , for example , it is absorbed exponentially ; the absorption varies di- rectly with the ...
Page 114
... light path , z , is ex- pressed in cm . Io OD = log T The sum of three coefficients contrib- ute to the total coefficient of absorption in natural waters , so that the intensity of light at depth z is : w . p ' I_ = le- * Xe - hin xec ...
... light path , z , is ex- pressed in cm . Io OD = log T The sum of three coefficients contrib- ute to the total coefficient of absorption in natural waters , so that the intensity of light at depth z is : w . p ' I_ = le- * Xe - hin xec ...
Page 118
... light in Lake Erie , but this is unusually high for lakes . In some very turbid waters the euphotic zone / Zsp ratio is substan- tially above 3.0 . In such cases , the white disc rapidly disappears from sight , but diffuse light ...
... light in Lake Erie , but this is unusually high for lakes . In some very turbid waters the euphotic zone / Zsp ratio is substan- tially above 3.0 . In such cases , the white disc rapidly disappears from sight , but diffuse light ...
Contents
Introduction | 1 |
A limnologic perspective | 7 |
The freshwater biota and aquatic habitats | 22 |
Copyright | |
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Common terms and phrases
abundant algae algal anaerobic animals aquatic autotrophic bacteria basins beneath benthic benthos bicarbonate biota bluegreens body of water bottom CaCO3 calcium carbonic acid cells chlorophyll cm² CO₂ coefficient common compounds concentration copepods crustaceans curve density depth diatoms dissolved ecosystem edaphic energy epilimnion eutrophic example factor fauna flow fresh water freshwater habitats heat Hutchinson hydrogen ions hypolimnetic hypolimnion inland waters lake surface larvae layer light Limnol limnologists limnology liter littoral magnesium ments meromictic meromixis mg/liter minerals nitrogen nutrients occurs oligotrophic organic oxidized oxygen periphyton phosphorus photosynthesis phytoplankton plankton plants ponds precipitation primary production profundal profundal zone ratio redox reduced regions relative respiration result rotifers saline salt sample sediments seiche shallow sodium solar soluble solution species stratification stream sulfate sulfur summer temperature thermocline tion titration Tom Wallace trophic trophic level vertical volume Wallace Lake waves wind winter zone