Biology 2485B Lecture Notes - Lecture 9: Hubbard Brook Experimental Forest, Particulates, Wollastonite
11 Apr 2018
School
Department
Course
Professor
Document Summary
Reading-acid rain at hubbard brook experimental forest (p. 408-409: acidic deposition= subtle changes in ph levels over long periods of time, hubbard brook is a forest in new hampshire"s mountains used for research and experiments. Research on hydrology study of water flow through forests and streams. Later on broadened research to study nutrient cycling in forests: measure long-term acid precipitation levels in the forest. Use small plastic funnels to channel precipitation into clean bottles. Measures acidity + conductivity amount of salt and other electrolytic contaminants dissolved in the water. Increased aluminum concentration"s in soil prevents tree roots from absorbing nutrients. =nutrient deficiency slows forest growth weakens trees making them more vulnerable to drought & insects. Acidification of soil doesn"t directly kill trees, but affects the availability of nutrients to trees. Reduces ability of soil & water to neutralize acidity: researchers dropped 50 tons of calcium mineral wollastonite over hubbard"s water sheds.
