APES Chapter 6 Flashcards
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| 4890095398 | Factors that Regulate Population Abundance and Distribution | Population size- the total number of individuals within a defined area at a given time. Population density- the number of individuals per unit area at a given time. Population distribution- how individuals are distributed with respect to one another. Population sex ratio- the ratio of males to females Population age structure- how many individuals fit into particular age categories. | 0 | |
| 4890095399 | Population Distribution |  | 1 | |
| 4890095400 | Factors that Influence Population Size | Density-dependent factors- the size of the population will influence an individual's probability of survival. Density-independent factors- the size of the population has no effect on the individual's probability of survival. | 2 | |
| 4890095401 | Limiting Recourses | Carrying Capacity - "k"; the limit of individuals the environment can sustainably hold |  | 3 |
| 4890095402 | Exponential Growth Model | Growth rate- the number of offspring an individual can produce in a given time period, minus the deaths of the individual or offspring during the same period. Intrinsic growth rate- under ideal conditions, with unlimited resources, the maximum potential for growth. |  | 4 |
| 4890095403 | logistic growth model |  | 5 | |
| 4890095404 | Variations of Logistic Model |  | 6 | |
| 4890095405 | K selected species | the population of a species that grows slowly until it reaches the carrying capacity. Ex. elephants, whales, and humans. | 7 | |
| 4890095406 | R selected species | the population of a species that grows quickly and is often followed by overshoots and die-offs. Ex. mosquitoes and dandelions | 8 | |
| 4890095407 | Survivorship Curves |  | 9 | |
| 4890095408 | Metapopulations | a group of spatially distinct populations that are connected by occasional movements of individuals between them. |  | 10 |
| 4890095409 | Competition | the struggle of individuals to obtain a limiting resource. |  | 11 |
| 4890095410 | Resource Partitioning |  | 12 | |
| 4890095411 | Predation | the use of one species as a resource by another species. True Predators - kill their prey Herbivores- consume plants as prey. Parasites- live on or in the organism they consume. Parasitoids- lay eggs inside other organisms | 13 | |
| 4890095412 | Mutualism | A type of interspecific interaction where both species benefit | 14 | |
| 4890095413 | Commensalism | a type of relationship in which one species benefits but the other is neither harmed nor helped. (plant growing off of a tree) | 15 | |
| 4890095414 | Symbiosis | two organisms living together for many generations | 16 | |
| 4890095415 | Keystone Species | a species that plays a role in its community that is far more important than its relative abundance might suggest. It is vital to keep a ecosystem intact | 17 | |
| 4890095416 | Primary Succession | occurs on surfaces that are initially devoid of soil. |  | 18 |
| 4890095417 | Secondary Succession | occurs in areas that have been disturbed but have not lost their soil. |  | 19 |
| 4890095418 | Aquatic Succession |  | 20 | |
| 4890095419 | Factors that determine species richness | Latitude Time Island Biogeography -Habitat size -Distance from source | 21 | |
| 4890095420 | Island Biogeography | the theory that explains that both habitat size and distance determine species richness. |  | 22 |
| 4890095421 | Habitat Fragmentation |  | 23 |