BIOL150 Chapter 3: BIOL 150 Chapter 3: Lecture 4 Readings: Aquatic Ecosystems
20 Jul 2016
School
Department
Course
Professor
Document Summary
Saturday, september 13, 2014 7:50 pm abiotic: or physical aspects such as temperature, precipitation, sunlight and wind biotic: living components are members of the same or different species. 3 key physical features affect the distribution and abundance of organisms: nutrient availability, water depth, water movement. Nutrient availability: washed away or fall to the ground. 2. can sweep organisms away fast flowing streams vs intertidal regions (air and waves) Freshwater environments: lakes and ponds ponds: small lakes: large enough that the water in them can be mixed by wind and wave action high latitudes, in depressions due to glaciers tropics: old river channels. 7 percent of the world"s renewable water supply runs through canada. Seashore shallow waters along the shore plants are rooted limnetic: Lake offshore receives enough light to support photosynthesis benthic: Depths made up of substrate photic: receive light vs aphotic: do not receive light. Differences: littoral and limnetic are warmer and better oxygenated benthic more nutrient rich.
