RNR 1001 : Exam 2 Notes
Document Summary
At the bottom of trophic web, consumes mercury. That species gets eaten in multiples by another specie. As you get hire in the trophic web the mercury intake is greater. Time out for science: we want to determine whether a secchi disk is adequate for measuring turbidity in louisiana and. Canada lakes: we measure secchi depths and turbidity levels in 20 lakes in both canada and louisiana, and get the following data: Most obvious effect is excessive plant growth, both macrophytes algae: chesapeake bay- chicken farms, eventually you"ll see fish gills with excessive nutrients in water areas. Loss of dissolved oxygen: diurnal oxygen production high, nocturnal respiration high, algae can become self-limiting mortality and decomposition go up. Some species (cyanobacteria) produce cyantoxins, such as anatoxin and microcystin. Harmful to many vertebrates, including fish and humans, fish mortality occurs in relatively low concentrations.
