a symbiotic relationship between two organisms where one benefits and the other is harmed
the part of earth that supports life. it includes the top portion of earths crust, all the water on earths surface, and the atmosphere that surrounds earth.
the study of organisms and how they interact with their environment. ecologists are the scientists that study this.
when two or more organisms seek the same resource at the same time. limits population size. most intense between organisms of the same species. also between different species.
the size of a population. measured by population counts. trap-mark-release method is a method where you capture an organism, mark it, and release it and continue the process. sample count method is a rough estimate of how many organisms you have in a large area.
factors of an ecosystem that limit the population growth of a species. these include: living space, food amounts, organisms eating other organisms, mates,
the largest number of individuals of one species an ecosystem can support over time
organisms that can't create their own energy-rich molecules. they eat other organisms to gain energy.
organisms the help recycle once-living matter by breaking it down into simple, energy-rich substances
a mixture of mineral and rocks particles, the remains of dead organisms, water, and air. it is the topmost layer of earths crust. it's considered biotic and abiotic because it contains living and nonliving things inside
an area's average weather conditions over time, including temperatures, rainfall or other precipitation, and wind. it helps determines the types of organisms that live there.
a model that shows all the possible feeding relationships among the organisms in a community. it is made up of many food chains.
sending an item through a process to make a new item out of the old one. glass, metal, paper, and plastic can go through this process.
the variety of life in an ecosystem. the common measure of this is the number of species that live in an area. more organisms live in the natural version of this than in the unnatural version.
when a habitat is destroyed for some reason. some reasons are: humans building things in the place of habitat and natural causes such as forest fire or tornadoes.