Trophic Level
1. Define the following terms (Chapter 19):
Ecology - the study of how organisms interact within their environments population size - number of individuals in a population population growth - the rate in which a population is growing or sinking
Population density - how many organisms share an area immigration - movement of individuals into an environment emigration - movement of individuals out of a population carrying capacity - stabilization of a population density dependent factors - factors that affect a population growth based on population size density independent factors - factors that affect population growth regardless of population size r - maximum growth rate K - represents the carrying capacity in mathematical formula …show more content…
A pioneering community is the first to be established. A climax community is the last stage of succession in which the populations of all organisms have remained stable.
7. What is a trophic level? Name and describe the trophic levels of an ecosystem. What is an omnivore?
A trophic level is composed of organisms that obtain energy the same way. Trophic level 1 is composed of plants, or producers. Trophic level 2 consists of primary consumers, or animals that eat plants (herbivore). Trophic level 3 is composed of secondary consumers, or animals that eat the herbivores (carnivores). Carnivores that consume carnivores are placed in the trophic level 4. Omnivores are animals that consume both plants and other animals.
8. Define primary productivity and net primary productivity. Why are more individuals found at lower trophic levels than at higher trophic levels?
Primary productivity is the amount of energy converted by producers into organic compounds. Net primary productivity is the amount of energy produced by photosynthesis excluding the energy use for the process. Due to the increased energy required for every step, more organisms can be found at lower trophic levels because they require very little
Ecology - the study of how organisms interact within their environments population size - number of individuals in a population population growth - the rate in which a population is growing or sinking
Population density - how many organisms share an area immigration - movement of individuals into an environment emigration - movement of individuals out of a population carrying capacity - stabilization of a population density dependent factors - factors that affect a population growth based on population size density independent factors - factors that affect population growth regardless of population size r - maximum growth rate K - represents the carrying capacity in mathematical formula …show more content…
A pioneering community is the first to be established. A climax community is the last stage of succession in which the populations of all organisms have remained stable.
7. What is a trophic level? Name and describe the trophic levels of an ecosystem. What is an omnivore?
A trophic level is composed of organisms that obtain energy the same way. Trophic level 1 is composed of plants, or producers. Trophic level 2 consists of primary consumers, or animals that eat plants (herbivore). Trophic level 3 is composed of secondary consumers, or animals that eat the herbivores (carnivores). Carnivores that consume carnivores are placed in the trophic level 4. Omnivores are animals that consume both plants and other animals.
8. Define primary productivity and net primary productivity. Why are more individuals found at lower trophic levels than at higher trophic levels?
Primary productivity is the amount of energy converted by producers into organic compounds. Net primary productivity is the amount of energy produced by photosynthesis excluding the energy use for the process. Due to the increased energy required for every step, more organisms can be found at lower trophic levels because they require very little