Terms : Hide Images
| 5695179189 | Population | individuals that belong to the same species and live in a given area at a particular time | 0 | |
| 5695185916 | Community | all of the population of organisms within a given area | 1 | |
| 5695193431 | Population Ecology | study of factors that cause populations to increase or decrease | 2 | |
| 5695209231 | Population Size (N) | total number of individuals within a defined area at a given time | 3 | |
| 5695216670 | Population Density | number of individuals per unit area at a given time (N/A) | 4 | |
| 5695235023 | Population Distribution | description of how individuals are distributed with respect to one another (Random, Uniform, Clumped) | 5 | |
| 5695248762 | Sex Ratio | ratio of males to females in a population (M:F) | 6 | |
| 5695255563 | Age Structure | description of how many individuals fit into particular age categories in a population | 7 | |
| 5695266059 | Limiting Resource | resource that a population cannot live without and that occurs in quantities lower than the population would require to increase in size. | 8 | |
| 5695286029 | Density-dependent Factor | factor that influences an individual's probability of survival and reproduction in a manner that depends on the size of that population | 9 | |
| 5695299757 | Carrying Capacity (K) | limit of how many individuals in a population the environment can sustain | 10 | |
| 5695319098 | Density-independent Factor | factor that has the same effect on an individual's probability of survival and the amount of reproduction at any population size | 11 | |
| 5695339324 | Population Growth Models | mathematical equations that can be used to predict population size at any moment in time | 12 | |
| 5695351922 | Population Growth Rate | number of offspring an individual can produce in a given time periods, minus the deaths of the individual or its offspring during the same time period | 13 | |
| 5695365716 | Intrinsic Growth Rate (r) | maximum potential for growth of a population under ideal conditions with unlimited resources | 14 | |
| 5695381738 | Exponential Growth Model | growth model that estimates a population's future size (Nt) after a period of time (t), based on the intrinsic growth rate (r) and the number of reproducing individuals currently in the population (No) |  | 15 |
| 5695412596 | J-shaped Curve | curve of the exponential growth model when graphed |  | 16 |
| 5695422432 | Logistic Growth Model | growth model that describes a population whose growth is initially exponential, but slows as the population approaches the carrying capacity of the environment | 17 | |
| 5695434865 | S-shaped Curve | shape of the logistic growth model when graphed |  | 18 |
| 5695447027 | Die-off | rapid decline in a population due to death | 19 | |
| 5695457804 | K-selected Species | species with a low intrinsic growth rate that causes the population to increase slowly until it reaches carrying capacity | 20 | |
| 5695474739 | r-selected Species | species that has a high intrinsic growth rate that causes the population to increase rapidly, which often leads to population overshoots and die-offs | 21 | |
| 5695496220 | Type I Survivorship Curve | pattern of survival over time in which there is high survival throughout most of the life span, but then individuals start to die in large numbers as they approach old age. |  | 22 |
| 5695533004 | Type II Survivorship Curve | pattern of survival over time in which there is a relatively constant decline in survivorship throughout most of the life span. | | 23 |
| 5695551216 | Type III Survivorship Curve | pattern of survival over time which there is low survivorship early in life with few individuals reaching adulthood. | | 24 |
| 5695568161 | Corridor | Strips of natural habitat that connect populations | 25 | |
| 5695573865 | Metapopulations | group of spatially distinct populations that are connected by occasional movements of individuals between them | 26 | |
| 5695586308 | Inbreeding Depression | when individuals with similar genotypes- typically relatives- breed with each other and produce offspring that have an impaired ability to survive and reproduce | 27 | |
| 5695612775 | Community Ecology | study of interactions between species | 28 | |
| 5695616826 | Symbiotic Relationship | relationship between two species that live in close association with each other | 29 | |
| 5695627651 | Competition | struggle of individuals to obtain a shared limited resource | 30 | |
| 5695642382 | Competitive Exclusion Principle | idea stating that two species competing for the same limiting resource cannot coexist | 31 | |
| 5695653997 | Resource Partitioning | when two species divide a resource based on differences in their behavior or morphology | 32 | |
| 5695672042 | Pedation | interaction in which one animal typically kills and consumes another animal | 33 | |
| 5695678600 | Parasitoid | specialized type of predator that lays eggs inside other organisms- referred to as its host | 34 | |
| 5695695662 | Parasitism | interaction in which one organism lives on or in another organism | 35 | |
| 5695703421 | Pathogen | parasite that causes diseases in its host | 36 | |
| 5695714550 | Herbivory | interaction in which an animal consumes a producer | 37 | |
| 5695719894 | Mutualism | interaction between two species that increase the chances of survival or reproduction for BOTH species | 38 | |
| 5695733418 | Commensalism | relationship between two species in which one species benefits and the other species is neither harmed nor helped | 39 | |
| 5695750804 | Keystone Species | species that plays a far more important role in its community than its relative abundance might suggest |  | 40 |
| 5695776703 | Ecosystem Engineer | keystone species that creates or maintains habitat from other species |  | 41 |
| 5695793895 | Ecological Succession | predictable replacement of one group of species by another group of species over time |  | 42 |
| 5695810307 | Primary Succession | ecological succession occurring on surfaces that are initially devoid of soil |  | 43 |
| 5695832972 | Secondary Succession | succession of plant life that occurs in areas that have been disturbed but have not lost their soil |  | 44 |
| 5695848729 | Pioneer Species | species that can colonize new areas rap[idly and grow well in full sunshine |  | 45 |
| 5695867930 | Theory of Island Biogeography | theory that demonstrates the dual importance of habitat size and distance in determining species richness |  | 46 |
| 5695921349 | Demography | study of human populations and population trends | 47 | |
| 5695925923 | Immigration | movement of people into a country or region, from another country or region | 48 | |
| 5695934998 | Emigration | movement of people out of a country or region | 49 | |
| 5695941587 | Crude Birth Rate (CBR) | number of births per 1000 individuals per year | 50 | |
| 5695949754 | Crude Death Rate (CDR) | number of deaths per 1000 individuals per year | 51 | |
| 5695956810 | Doubling Time | number of years it takes a population to double | 52 | |
| 5695978033 | Total Fertility Rate (TFR) | estimate of the average number of children that each woman in a population will bear throughout her childbearing years | 53 | |
| 5695992631 | Replacement-level Fertility | TFR required to offset the average number of deaths in a population in order to maintain the current population size | 54 | |
| 5696012555 | Developed Country | country with relatively high levels of industrialization and income | 55 | |
| 5696023731 | Developing Country | country with relatively low levels of industrialization and income | 56 | |
| 5696033734 | Life Expectancy | average number of years that an infant born in a particular year in a particular country can be expected to live, given the current average life span and death rate of that country | 57 | |
| 5696052528 | Infant Mortality | number of deaths of children under 1 year of age per 1000 live births | 58 | |
| 5696060376 | Child Mortality | number of deaths of children under age 5 per 1000 live births | 59 | |
| 5696074805 | Net Migration Rate | difference between immigration and emigration in a given year per 1000 people in a country | 60 | |
| 5696091425 | Age Structure Diagram | visual representation of the number of individuals within specific age groups for a country, typically expressed for males and females |  | 61 |
| 5696121356 | Population Pyramid | age structure diagram that is widest at the bottom and smallest at the top, typical of developing countries |  | 62 |
| 5696131665 | Population Momentum | continued population growth after growth reduction measures have been implemented | 63 | |
| 5696160132 | Theory of Demographic Transition | theory that as a country moves from a subsistence economy to industrialization and increased affluence, it undergoes a predictable shift in population growth |  | 64 |
| 5696191229 | Affluence | state if having plentiful wealth including the possession of money, goods or property | 65 | |
| 5696197138 | Family Planning | practice of regulating the number or spacing of offspring through the use of birth control | 66 | |
| 5696211644 | IPAT Equation | equation used to estimate the impact of the human lifestyle on the environment: Impact = population * affluence * technology | 67 | |
| 5696233007 | Gross Domestic Product (GDP) | measure of the value of all products and services produced in one year in one country | 68 | |
| 5696244429 | Urban Area | an area that contains more than 385 people per square kilometer (1000 people / sq. mile) |  | 69 |
