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| Group of individuals of the same species that live, interact, and reproduce together in a particular geographic area |
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| The number of individuals in a population per unit of area |
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| the spatial distribution of individuals |
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| The quantitative study of the processes that determine the structure of populations (the relative proportions of individuals of different sizes, ages, stages, and genders), and the changes in these attributes |
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| Diagrams show how a population is distributed. It divides the population into pre-reproductive, reproductive and post-reproductive phases.The shape of the diagram can show you if a country is growing rapidly, slowly, or negatively. |
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| Refers to the ratio at conception. |
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| A graph showing the number or proportion of individuals surviving to each age for a given species or group |
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| The average number of offspring produced by in individual female during a particular lifestage, age, or period of time |
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| A type of reproductive life history in which individuals are physiologically capable of reproducing multiple times in a lifetime |
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| A type of reproductive fight history in which individuals are physiologically capable of reproducing only one time during their lives. Organisms often die after reproducing once |
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•J-Shaped curve
•Only the physiological capacity of the organism limits growth |
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•S-shaped curve
•Applies to most populations |
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| The maximum population size or density of a given species that a given unchanging environment can support indefinitely |
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| variables that exert greater influence on population size when population has high density |
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| density-independent factor |
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Definition
| variables that influence population size regardless of population size and usually include abiotic factors such as Weather events, fires, and floods. |
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| when a population grows at exponential or near-exponential rates, then either outstrips its resources or the population density becomes so high that other limiting features kick in, such as endemic disease, or stress inhibiting breeding, at which point the death rate outstrips the birth rate and the population level crashes. |
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| species with a capicty for a high rate of population increase, overcome losses by reproducign many offspring |
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| reproduce later in life and have a smaller number of offspring, long life spans, cared for by parents |
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| individuals of different species simultaneously occupying the same general area, utilizing the same resources, and influenced by similar environmental factors |
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| Reciprocal evolutionary change in 2 or more species resulting from the interaction between them |
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| to capture, kill, & consume another organism |
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| blending into the environment |
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| bold colors that serve as a warning sign to would be predators |
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| one organism copies another organism to gain a protective advantage |
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| relationship in which one organism benefits & the other is harmed |
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The “eater”
-An organism that feeds on the cell contents, tissues, or body fluids of another species (the host) while in or on the host organism. They harm but usually do not kill their host. |
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The “eaten”
-The larger participant in a symbiotic relationship, serving as home and food source for the smaller symbiont. |
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Requires coevolution of both species
-Interaction between 2 organisms, both benefit. |
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| An interaction between individuals of the same or different species whereby resources used by one are made unavailable to others |
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how an organism “fits” in the community
-The sum of a species' use of the biotic and abiotic resources in its environment. |
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| One organism benefits without affecting the other |
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| number of different species present |
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| frequency of appearance of a species |
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| accounts for the frequency with which species appear in the community and the number of different species |
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Definition
practice of growing same crop repeatedly in time and space
-producing or growing one crop over a wide area |
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| Complex form of intercropping in which a large number of different plants maturing at different times are planted together. |
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| pattern of change in community composition following a disturbance |
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