EVPP 108 Lecture Notes - Lecture 3: Protoplasm, Ecological Pyramid, Photoperiodism

• School: George Mason University
• Department: Environmental Science and Public Policy
• Course: EVPP 108
• Professor: Kim Largen

Document Summary

Structural (architectural) aspect: the composition of biological community including species, numbers, biomass, life history etc. The quantity and distribution of non-living materials like nutrients, water etc. The conditions of existence such as temperature, light etc. The rate of material (nutrient) cycles: biological regulation including both regulation of organisms by environment (photoperiodism) and regulation of environment by the organism (nitrogen fixing organism) Abiotic (non-living) components: includes inorganic substances (c, n, o, p, s etc. ), inorganic chemicals (chlorophyll), organic materials (proteins, carbohydrates, lipids etc. : they are present either in biomass or in the environment. Biotic (living) components: these are the trophic (nutritional) structure of ecosystem (trophic feeding, based on nutritional relationship they are distinguished. Autotrophic or self-nourishing components: use light energy to make food from simple inorganic substances (h. Heterotrophic or other-nourishing components: utilize rearrange and decompose the complex materials produced by the autotrophs, known as consumers, eg.