BSC 2011 Lecture Notes - Lecture 36: Thermoregulation, Raymond Lindeman, Energy
21 Apr 2015
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Bsc2011 - integrated principles of biology 2 - lecture 36: ecosystems. An ecosystem is a community of interacting organisms, along with their environment that influence the flow of energy and nutrients. Grouped organisms by how they obtain their food. Ooze particulate or dead organic matter. Photosynthesis: 6co2 + 6h2o ----> c6h12o6 + 6o2 in the presence of light. Net primary productivity = rate primary produces make plant biomass. Energy can be transferred or transformed, but it cannot be created or destroyed. Quality of matter/energy deteriorates gradually over time. Usable energy is converted into unusable energy. The basis for most food webs . Makes energy from solar radiation available to organisms . Captures only 1- 2% of total solar radiation. Ecological efficiency = % energy transferred from one trophic level to the next trophic level. ~10% of energy passes between trophic levels. Secondary production and energy flow through ecosystems.
