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Ecology St. Geme
Ecology Flashcards
| Question | Answer |
|---|---|
| What is Ecology? | The scientific study of interactions among organisms and their environment, or their surroundings. |
| What is a biosphere? | 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 breathe and produce 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? | Acollection of all the organisms that live in a particular place, together with their nonliving,or physical, environment. |
| What is an autotroph? | Plants, some algae, and bacteria that capture energy from sunlight or chemicals and use that energy to produce food. |
| What is a heterotroph? | Organisms that rely on other organisms for their energy, ad food supply. |
| What is a food web? | Wehn the feeding relationships among the various organisms in an ecosystem form a network of complex interactions. |
| What is a trophic level? | Each step in a food chain or food web. |
| What is biomass? | The total amount of living tissue within a given trophic level. |
| What is a biogeochemical cycle? | Allows elements, chemical compounds, and other forms of matter to pass from one organism to another and from one part of the biosphere to another, through this. |
| What is limiting nutrient? | When an ecosytem is limited by a single nutrient that is scarce or cycles very slowly. |
| What is weather? | The day-to-day condition of Earth's atmosphere ata particular time and place. |
| What is climate? | Refers to the average, year-by-year conditions of temperature and precipitation in a particular region. |
| What is the greenhouse affect? | 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 ecosystems. |
| What is a niche? | The full range of physical and biological conditions in which an organism lives and the way in which the organisms use these conditions. |
| What is logistic growth? | Occurs when a population's growth slows or stops following a period of exponential growth. |
| What is carrying capacity? | The largest number of individuals in an environment. |
| What is demography? | The scientific study of human populations. |
| What is demographic transition? | Adramatic change in birth and death rates. |
| What is the green revolution? | The introducton of modern agricultural techniques. |
| What is a renewable source? | Can regenerate if they are alive or can be replenished by biochemical cycles if they are nonliving. |
| What is a pollutant? | A harmful material that can enter the bioshpere thorugh the land, air, or water. |
| What is biodiversity? | The sum total of the genetically based variety of all organisms in the biosphere. |
| What is biological magnification? | Concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web. |
Created by:
bostgeme1
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