Terms : Hide Images
| 6565415663 | abundance | A lot of something. | 0 | |
| 6565415664 | commensalism | A relationship between two organisms in which one organism benefits and the other is unaffected | 1 | |
| 6565415665 | trophic level | Each step in a food chain or food web | 2 | |
| 6565415666 | tertiary consumer | A carnivore that eats other carnivores. | 3 | |
| 6565415667 | secondary consumer | A carnivore that eats a herbivore | 4 | |
| 6565415668 | primary consumer | An organism that eats producers | 5 | |
| 6565415669 | complexity | difficulty | 6 | |
| 6565415670 | competition | Interaction among organisms that want the same resource in an ecosystem | 7 | |
| 6565415671 | thermocline | A layer of water in which temperature changes rapidly with the depth | 8 | |
| 6565415672 | tropical rainforest | Hot climate, wet season year-round. | 9 | |
| 6565415673 | tropical seasonal forest | Hot climate, wet and dry seasons, trees shed leaves during dry season | 10 | |
| 6565415674 | wetland | An area of land that is covered with a shallow layer of water during some or all of the year. | 11 | |
| 6565415675 | tundra | Cold climate, dry season year-round biome. Has permafrost, lots of shrubs | 12 | |
| 6565415676 | permafrost | Permanently frozen ground | 13 | |
| 6565415677 | temperate forest | Moderate climate, wet and dry season, trees shed leaves | 14 | |
| 6565415678 | taiga | Cold winters, moderate summers, forest of coniferous trees. | 15 | |
| 6565415679 | swamp | A wetland ecosystem in which trees grow | 16 | |
| 6565415680 | savanna | Dominated by grasses and scattered trees, close to the equator. | 17 | |
| 6565415681 | phytoplankton | Tiny floating photosynthetic organisms, primarily algae | 18 | |
| 6565415682 | pelagic | Ocean area anywhere but the bottom. Made up of photic and aphotic | 19 | |
| 6565415683 | marsh | A wetland ecosystem in which shrubs grow | 20 | |
| 6565415684 | mangrove | Coastal wetlands, plants grow in waterlogged saltwater | 21 | |
| 6565415685 | hypolimnion | The densest, coldest water layer in a lake. Isolated from wind. Too dark for photosynthesis, low oxygen. | 22 | |
| 6565415686 | grassland | hot climate, dry season year-round. rich soils. found in the interior of continents | 23 | |
| 6565415687 | estuary | A habitat in which the fresh water of a river meets the salt water of the ocean. | 24 | |
| 6565415688 | epilmnion | water temperature changing due to wind and sunlight, high photosynthesis, high oxygen | 25 | |
| 6565415689 | desert | An extremely dry area with little water and few plants, can be hot or cold. | 26 | |
| 6565415690 | deciduous forest | a biome based on trees that lose their leaves each fall | 27 | |
| 6565415691 | coral reef | An ocean ridge made up of skeletal remains of tiny sea animals | 28 | |
| 6565415692 | coniferous forest | Evergreen trees with needles and cones, do not lose leaves. | 29 | |
| 6565415693 | chapparal | biome bordering the mediterranean sea; characterized by wet winters and warm dry summers, shrubby --> prone to forest fires | 30 | |
| 6565415694 | bog | wet muddy ground full of decaying peat moss --> decay process is slow due to low oxygen--> slowly forms peat (used as an energy source) and is the precursor to coal | 31 | |
| 6565415695 | biome | A group of ecosystems with similar climates and organisms | 32 | |
| 6565415696 | benthos | Bottom-dwelling organisms. | 33 | |
| 6565415697 | tolerance limits | The limit of a variable at which a particular species cannot survive or is unable to reproduce | 34 | |
| 6565415698 | territoriality | Animal defends its territory | 35 | |
| 6565415699 | symbiosis | A close relationship between two species that benefits at least one of the species. | 36 | |
| 6565415700 | stability | A situation in which things continue without any major changes or problems | 37 | |
| 6565415701 | specialist | A consumer that primarily eats one specific organism or feeds on a very small number of organisms; disruptions to environment are catastrophic to survival | 38 | |
| 6565415702 | secondary succession | A type of succession that occurs where an existing community has been cleared by some disturbance that leaves the soil intact. | 39 | |
| 6565415703 | resource partitioning | The differentiation of niches that enables similar species to coexist in a community | 40 | |
| 6565415704 | resiliance | the ability of an organism to recover from stress or pressure | 41 | |
| 6565415705 | law of tolerance | For each abiotic factor, an organism has a set range of tolerances within which it can survive | 42 | |
| 6565415706 | realized niche | Part of a species fundamental niche that it actually uses, limited by competition. | 43 | |
| 6565415707 | primary succession | Process by which a community arises in a virtually lifeless area with no soil | 44 | |
| 6565415708 | primary productivity | Rate at which organic matter is created by producers in an ecosystem | 45 | |
| 6565415709 | consumer | An organism that obtains energy by feeding on other organisms | 46 | |
| 6565415710 | producer | An organism that makes its own food (usually through photosynthesis | 47 | |
| 6565415711 | photosynthesis | Converting light (heat energy) into food (chemical energy) CO2 + H2O --(light energy)--> C6H12O6 + O2 | 48 | |
| 6565415712 | predation | An interaction in which one organism kills another for food. | 49 | |
| 6565415713 | pioneer species | First species to populate an area during primary succession | 50 | |
| 6565415714 | pathogen | An organism that causes disease | 51 | |
| 6565415715 | natural selection | A natural process resulting in the evolution of organisms best adapted to the environment. | 52 | |
| 6565415716 | species | A group of living organisms that can breed and produce fertile offspring. | 53 | |
| 6565415717 | parasitism | A symbiotic association in which one organism benefits while the other is harmed. | 54 | |
| 6565415718 | mutualism | A relationship between two species in which both species benefit | 55 | |
| 6565415719 | keystone species | A species that influences the survival of many other species in an ecosystem | 56 | |
| 6565415720 | intraspecific competition | Competition among members of the same species | 57 | |
| 6565415721 | interspecific competition | Competition between members of different species | 58 | |
| 6565415722 | generalist | a species with a broad niche that can tolerate a wide range of conditions and can use a variety of resources; highly adaptable to environmental disturbances | 59 | |
| 6565415723 | exotic species | Non-native species in an area; may take over niches of native species in an area and eventually replace them. | 60 | |
| 6565415724 | native species | Species that have naturally evolved in an area | 61 | |
| 6565415725 | fundamental niche | The full potential range of conditions and resources a species could theoretically use if there was no competition from other species | 62 | |
| 6565415726 | fire-climaxed communities | biome characterized by periodic fires every few years, followed by secondary succession (Chapparal) | 63 | |
| 6565415727 | evolution | Change over time | 64 | |
| 6565415728 | environmental indicators | A measured variable that can inform a scientist about the state of an environmental system | 65 | |
| 6565415729 | edge effect | different conditions along the boundaries of an ecosystem | 66 | |
| 6565415730 | ecotone | A transitional zone where ecosystems meet. edge effect | 67 | |
| 6565415731 | succession | Gradual change in organisms that occurs when the environment changes | 68 | |
| 6565415732 | niche | Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions | 69 | |
| 6565415733 | diversity | A measurement of the number of species inhabiting an ecosystem. | 70 | |
| 6565415734 | biotic potential | maximum rate at which a population could increase without competition | 71 | |
| 6565415735 | density dependent factors | A limiting factor of a population wherein large, dense populations are more strongly affected than small, less crowded ones. (food shortages, land, disease) | 72 | |
| 6565415736 | emigration | movement of individuals out of an area | 73 | |
| 6565415737 | immigration | movement of individuals into an area | 74 | |
| 6565415738 | mortality | Death rate | 75 | |
| 6565415739 | natality | Birth rate | 76 | |
| 6565415740 | survivorship | Shows the number of survivors of each age group for a particular species. | 77 | |
| 6565415741 | S curve | Logistic growth curve. Leveling off of an exponential, J-shaped curve when a rapidly growing population exceeds the carrying capacity of its environment and ceases to grow. | 78 | |
| 6565415742 | r-selected species | Species that reproduce early in their life span and produce large numbers of usually small and short-lived offspring in a short period; no mothering of their young | 79 | |
| 6565415743 | population crash | a sudden population decline caused by predation, waste accumulation, or resource depletion | 80 | |
| 6565415744 | population density | Describes how many individuals are in a certain area. | 81 | |
| 6565415745 | overshoots | to exceed the carrying capacity of an area | 82 | |
| 6565415746 | minimum viable population | The smallest population size at which a species is able to sustain its numbers and survive. Any lower than this, and genetic diversity is too low. | 83 | |
| 6565415747 | logistic growth | Population growth that is controlled by limited resources. | 84 | |
| 6565415748 | life expectancy | How long an individual is expected to live | 85 | |
| 6565415749 | k-selected species | are characterized by producing low numbers of large offspring. They have slow maturation, long gestation periods, parental care and long life in a stable environment. Bigger animals. humans | 86 | |
| 6565415750 | J curve | a curve representing exponential (unrestricted) population growth | 87 | |
| 6565415751 | genetic drift | A change in the gene pool of a population due to chance | 88 | |
| 6565415752 | founder effect | Genetic drift that occurs after a small number of individuals colonize a new area | 89 | |
| 6565415753 | fertility | the ability of a population to reproduce, or soil to support plants | 90 | |
| 6565415754 | fecundity | fertility | 91 | |
| 6565415755 | environmental resistance | All of the limiting factors that act together to limit the growth of a population. | 92 | |
| 6565415756 | density independent factors | Environmental resistance that affects a population regardless of density. (weather disasters) | 93 |
