APES- Chapter 6 Flashcards
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| 5941059615 | Population Ecology | Study of factors that make the populations to increase or decrease. |  | 0 |
| 5941059616 | Population size | (N). The number of individuals within a defined area at a given time. |  | 1 |
| 5941059617 | Population density | The number of individuals per unit area at a given time. |  | 2 |
| 5941064712 | Population distribution | A description of how individuals are distributed with respect to one another. |  | 3 |
| 5941067505 | sex ratio | the ration of males to females in a population. | 4 | |
| 5941071008 | age structure | A description of how many individuals fit into particular age categories in a population. |  | 5 |
| 5941072891 | density-dependent factors | A factor that influences an individual's probability of survival and reproduction in a manner that depends on the size of the population. |  | 6 |
| 5941075727 | limiting resource | A resource that a population cannot live without | 7 | |
| 5941079931 | carrying capacity | K. The maximum number of individuals in a population the environment can sustain. |  | 8 |
| 5941081675 | population growth rate | The number of offspring an individual can produce , minus the deaths in its offspring during the same period. |  | 9 |
| 5941081676 | intrinsic growth rate | (r) The maximum potential for growth of a population under ideal conditions with unlimited resources. | 10 | |
| 5941086452 | Exponential growth model | Estimates a population's future size after a period of time, based on the intrinsic growth rate and the number of reproducing individuals. |  | 11 |
| 5941086453 | logistic growth model | A population model that is initially exponential, but slows as the population approaches the carrying capacity of the environment. |  | 12 |
| 5941088451 | overshoot | When the population is larger than the environment's carrying capacity. |  | 13 |
| 5941088452 | die-off | A rapid decline in a population due to death. | 14 | |
| 5941091129 | k-selected species | Species with low intrinsic growth that causes the population to increase slowly until it reaches carrying capacity. |  | 15 |
| 5941093249 | r-selected species | A species that has a high intrinsic growth rate, which often leads ti population overshoots and die-offs. |  | 16 |
| 5941094676 | Type I Survivorship curve | When there is a high survival throughout most of the life span, but then the individuals start to die in large numbers as they approach old age. |  | 17 |
| 5941097806 | Type II Survivorship curve | When there is a relatively constant decline in survivorship throughout mot of the life span. | | 18 |
| 5941099606 | Type III Survivorship curve | When there is a low survivorship early in life with few individuals reaching adulthood. | | 19 |
| 5941099607 | corridors | strips of natural habitat that connect populations. |  | 20 |
| 5941101223 | metapopulation | A group of spatially distinct populations that are connected by occasional movements of individuals between them. |  | 21 |
| 5941103766 | Inbreeding depression | When individuals of similar genotypes breed with each other and produce offspring that have an impaired ability to survive and reproduce. |  | 22 |
| 5941103767 | community ecology | The study of interactions between species. |  | 23 |
| 5941106375 | symbiotic relationship | The close relationship between two species. |  | 24 |
| 5941106376 | competition | The struggle of individuals to obtain a shares limiting resource. |  | 25 |
| 5941109266 | competitive exclusion principle | when two species competing for the same limiting resource cannot coexist. |  | 26 |
| 5941109267 | resource partitioning | When two species divide a resource based on differences in their behavior or morphology. |  | 27 |
| 5941110620 | predation | When one animal kills and consumes another animal. |  | 28 |
| 5941113590 | parasitoids | A special type of predator that lays eggs inside other organisms- referred to as its host. |  | 29 |
| 5941113632 | pathogen | A parasite that causes disease in its host. |  | 30 |
| 5941115848 | herbivory | When an animal consumes a producer. |  | 31 |
| 5941115849 | mutualism | When two species increases their chances of survival or reproduction for both species. |  | 32 |
| 5941117653 | commensalism | When one organism benefits and the other species is neither harmed nor helped. |  | 33 |
| 5941117654 | keystone species | A species that plays a far more important in its community than its relative abundance might suggest. |  | 34 |
| 5941121913 | ecosystem engineer | A keystone species that creates or maintains habitat for other species. |  | 35 |
| 5941125562 | ecological succession | The predictable replacement of one group of species by another group of species over time. |  | 36 |
| 5941156707 | primary succession | A succession occurring on surfaces that are initially devoid of soil. |  | 37 |
| 5941156708 | secondary succession | A succession of plant life that occurs in areas that have been disturbed but have lost their soil. |  | 38 |
| 5941161619 | pioneer species | A species that can colonize new ares rapidly and grow well in full sunshine. |  | 39 |
| 5941166112 | theory of island biogeography | Demonstrates the dual importance of habitat size and distance in determining species richness. |  | 40 |