Biology 102 Notes3

Biology 102 Notes3 - BIOL 102 Lecture 11 INTRODUCTION TO...

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BIOL 102 Lecture 11: INTRODUCTION TO ECOLOGY The study of ecology is how organisms interact with their environment. There are different factors that are involved such as, biotic (living) and abiotic factors (non-living: sunlight, temperature). o Organismal ecology: Physical and behavioral adaptations that allow individuals to survive in their environment. How does the individual fit in and deal with their environment. o Population ecology: How and why the number of individuals in a population changes over time. What influences how many of the species there are? o Community ecology: Interaction between species and the consequences of those interactions. Who eats who? o Ecosystem ecology: How the nutrients and energy move among organisms and through surrounding soil and water. How it moves through the ecosystem. Where it comes from. Trophic levels : Organisms are organized based on their food source. o Autotrophs: Make their food with inorganic nutrient and an outside energy source. Also called producers. They are critical because it takes energy from abiotic factors and creates energy for everyone else. o Heterotrophs: Get their food from another source. Also called consumers, but some are decomposers, but they absorb their food from dead organic material. Primary consumers: Eat producers (herbivores). Secondary consumers: eat herbivores (carnivores/ omnivores) Tertiary consumers: Eat secondary consumers. Decomposers: absorb their food from dead organic material (fungi or bacteria). Photosynthesis: Producers preform this process to make high-energy organic molecules using low energy inorganic molecules. Chemosynthesis: Producers make food without using sunlight. It allows organisms to produce glucose using heat and high-energy inorganic molecules.
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