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Transcript
Notes 2 Carrying Capacity SCI 10 Ecology Carrying Capacity Carrying capacity: The largest population of a species that can be supported by an environment Carrying Capacity Determined by 4 factors: 1. Matter and energy 2. Food chains 3. # of predators Size of populations lower down on the chain (the amount of food available) Competition 4. Sunlight, water, carbon, etc. Intraspecific: between the members of a same species Interspecific: between different species Population density: the number of individuals that can live in one place at the same time Density-dependent factors: factors that are present during times of overpopulation (stress, spread of illness and parasites, etc.) Density-independent factors: factors that are present regardless of population size (fire, flood, earthquake, volcanic eruption, drought, hurricane) Healthy Ecosystems An ecosystem where each organism has many different food sources is more sustainable Greater biodiversity (variety in number of different species) implies a healthier ecosystem Better able to withstand changes (loss of a population of organisms, illness, etc.) Graphing Carrying Capacity Population (Y axis) vs. Year/Time (X axis) If the line on the graph is: Going up: population is increasing Going down: population is decreasing Horizontal: population is at its carrying capacity for that species in that ecosystem Example Graph Questions During which months is the hare population increasing? What is the carrying capacity of hares in Sackville? To Do Notes 2 Fill-in-the-blanks (use your text and these notes)