LIFESCI 1 Lecture 27: LS1- Chpater 36 and 53 Notes
Document Summary
Life and global chemical cycles: micronutrients: elements require in small amounts by all life, macronutrients: 24 elements required by all organisms. Building blocks of life ( big six ): c, o2, h, n, p, s. Living soils : hold water (key to thriving during drought, sequester carbon ( ght climate change, hold nutrients in soil, permeates and lters pollutants out of water, naturally decomposes organic matter (cycles nutrients) Maintains nutrients and water, aeration, balanced acidity (ideal for plants: micro ora: physically and through combouns produced help bind soil aggregates. Tilling the soil: soil erosion and loss, sediment pollution in streams, killing of soil, rids topsoil. Tropical regions soil (tropical regions have largest biodiversity of any environment) Monday, november 28, 2016: nutrients cycle quickly, most of the biomass in the tropics is living, deforestation means organic matter and nutrients are gone.
