GEV 4517 Lecture Notes - Lecture 8: Heterocyst, Venus Flytrap, Limiting Factor
1 Dec 2016
School
Department
Course
Professor
Document Summary
Nutrient availability and light limit the distribution patterns and abundance of organisms. How soil development affects the availability of nutrients for life on earth. How plants and microbes are affected by low/high nutrient levels. How light/co2/o2 availability can impact the distribution and abundance of different species. How species distributions are often limited by multiple abiotic factors. Dry weights of plants contain 1. 5% n and 0. 2% p. Animals contain 6. 5% n and 1% p. Earth"s (cid:272)rust: (cid:1004). (cid:1004)(cid:1007)% n a(cid:374)d (cid:1004). (cid:1005)(cid:1005)%p: these ele(cid:373)e(cid:374)ts are i(cid:374) short supply for organisms. Carbon mass for plants is 45% and animals 57% supplied by atmospheric co2, crust only 0. 18% c. Ca, s important because components of dna and proteins. Soil is the complex loose terrestrial surface material in which plants grow. 3 components (forms individual soil profile) soil starts as weathering rocks, water, organic components: o horizon organic layer.
