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Transcript
Levels of Biological Organization From the whole to the individual Levels of Biological Organization The Earth is a big place! It is covered with land and water biomes. In each biome are thousands of living and non living things. Every thing that exists in the earth (alive or not) has an affect on the other things around it. The stages that things affect all life at different levels, makes up the Levels of Biological Organization. Levels of Biological Organization Ecology The study of organisms and their interactions with the physical features of their environment. From Greek: Eco comes from Oikos – “house” -logy – “the study of” Organism A living thing. Biosphere The outer layer of the earth (like the peel of an orange) that contains all living things and the things they need to survive). Biotic vs. Abiotic Factors Biotic: Abiotic: A living thing. A non-living thing. Never was alive. Light, temperature, gases, water, rock. Ecosystem A biotic community and the abiotic factors that affect it. Community Groups of populations that interact together. (Only living things!) Interactions in Communities An interaction is how two or more organisms act while they are around each other. There are lots of possibilities that could take place. Brainstorm… Predation One species feeds on another species. Symbiosis Symbiosis means that two organisms are living together without attempting to kill each other. Sometimes this is a good way to live together, and sometimes not so good and one organism possibly dies even though that was not the intent. There are three types of symbiosis: Mutualism Commensalism Parasitism Mutualism Two species help each other and both benefit. Commensalism One species benefits and one species gets nothing from the relationship. Parastism One species benefits and one species gets hurt from the relationship. The harm is unintentional. Population Density The number of individual species per unit area. Limiting Factor The factor or reason that a population cannot get any bigger. Carrying Capacity The amount of species that can live in an area. How many the area can support. Population Individuals of the same species living together that can breed. Habitat A home or an area where a species lives. Niche The role or job or an organism in its environment. Species A single living thing, an organism. Beyond Organism