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Ecology Malley
Ecology
| Question | Answer |
|---|---|
| What is ecology? | The scientific study of interactions among organisms and between organisms and their environment, or surroundings. |
| What is the biosphere? | The largest of nature's "houses" that contains the combined portions of the planet in which all of life exists, including land, water, air, or atmosphere. |
| What is a species? | A group of organisms so similar to one another that they can breed and produce fertile offspring. |
| What is a population? | Groups of individuals that belong to the same species and live in the same area. |
| What is a community? | Assemblages of different populations that live together in a defined area. |
| What is an ecosystem? | A collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment. |
| What is a biome? | A group of ecosystems that have the same climate and similar dominant communities. |
| What is an autotroph? | Organisms that can capture energy from sunlight or chemicals and use that energy to produce food; only plants, some algae, and certain bacteria are autotrophs. |
| What is a heterotoph? | An organism that relies on other organisms for energy and food supply. Heterotophs are also called consumers. |
| What is a food web? | Relationships among the various organisms in an ecosystem that form a network of complex interactions. A food web links all the food chains in an ecosystem together. |
| What is trophic level? | Each step in a food chain or food web. Producers make up the first trophic level. Consumers the second, third, or higher trophic levels. |
| What is a biomass? | The total amount of living tissue within a given trophic level. |
| What is there biogeochemical cycle? | Elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through this cycle. |
| What is a limiting nutrient? | When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly, this substance ins called a limiting nutrient. |
| What is weather? | The day-to-day condition of Earth's atmosphere at a particular time and place. |
| What is climate? | Climate refers to the average, year-after-year conditions of temperature and precipitation in a particular region. |
| What is the greenhouse effect? | The natural situation in which heat is retained by this layer of greenhouse gases. |
| What is a biotic factor? | The biological influences on organisms within an ecosystem. |
| WHat is an abiotic factor? | Physical, or nonliving, factors that shape ecosytems. |
| What is a niche? | The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions. |
| What is logistic growth? | Occurs when a population's growth slows or stops following a period of exponential growth. |
| Why does logistic growth occur? | As resources become less available, the growth of a population slows or stops. |
| WHat is the carrying capacity? | The largest number of individuals of a population that a given environment can support. |
| What is demography? | The scientific study of human populations. |
| What is demographic transition? | A dramatic change in birth and death rates. |
| What is the green revolution? | The effort for the use of modern agricultural techniques were introduced, such as monoculture and the use of chemical fertilizers to increase the world's food supply greatly. |
| What is a renewable resource? | Resource that can regenerate quickly and that is replaceable. |
| What is a nonrenewable resource? | A resource that cannot be replenished by natural processes. |
| What is a pollutant? | A harmful material that can enter the biosphere through the land, air, or water. |
| What is biodiversity? | The sum total of the genetically based variety of all organism in the biosphere. |
| What is biological magnification? | Increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
saifman
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