BIOLOGY 2F03 Lecture 6: Ch.20 – Nutrient and Elemental Cycling
11 Dec 2015
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Document Summary
Nutrients: the elements organisms require for development, maintenance and. Nutrient cycling: the transformation, movement and refuse of nutrients in an. Energy makes a one-way passage through ecosystems, while essential nutrients such as phosphorus (p), may be recycled. Macronutrients: essential element required in large concentrations within an. Micronutrients: essential element required in small concentrations within an reproduction ecosystem organism organism. All common elements have global cycles that include biotic and. Chemical transformations move c, n and p among different biotic and abiotic. Human actions and natural processes influence the rate of chemical flux and the size of each pool. Essential to energetics, genetics and structure of living systems, forming part of atp, rna, dna and phospholipid molecules. P is not very abundant in biosphere. Phosphorus limits plant growth in old soils only. P is released into terrestrial and aquatic ecosystems through the weathering of rocks. As it is released, it is absorbed by plants.
