Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Biogeography Ch. 6
Terms from "Biogegraphy" Ch. 6 by Lomolino et al. (5th edition)
| Term | Definition |
|---|---|
| dispersal | movement of individuals from their natal range (their birthplace) to new sites |
| immigration | the arrival of new individuals to an isolated site. |
| vicariance biogeography | an approach in historical biogeography that attempts to reconstruct the historical events that led to observed distributional patterns based largely on the assumption that these patterns resulted from the splitting (vicariance) of areas and not dispersal. |
| Baas Becking hypothesis (Beijerinck's law) | A statement which holds that where the likelihood of dispersal and eventual colonization is relatively high, the geographic distributions of these species are largely limited by local environmental conditions and physiological tolerances of the species. |
| migrations | roundtrip movements from and later returning to a breeding site or other area, typically in response to the seasons. |
| nomadism | movement of groups of individuals of a species in response to varying resources, but not following a fixed route or seasonal pattern. |
| vagrancy | unpredictable movements of individuals outside their normal range or migration route (i.e., "accidental" or extralimital occurrences), often in response to extreme weather. |
| stochastic | Random; expected (statistically) by chance alone. |
| jump dispersal | long-distance dispersal involving crossing a significant distance in which the species is absent, and accomplished by movement of individuals within a relatively short period. |
| propagules | any part of an organism, or group of organisms, or stage in the life cycle that can reproduce the species and thus establish a new population. |
| non-volant | An organism that is unable to fly. |
| diffusion | range expansion accomplished over generations by individuals moving out from the margins of the population's or species' range. |
| secular migration | dispersal and range expansion occurring over many generations, thus allowing substantial evolutionary changes in the populations en route as they expand and colonize new regions |
| vagrants | Individuals seen outside their normal range or migration route. |
| diaspores | Any part or stage in the life cycle of an organism that is adapted for dispersal. |
| aerial plankton | A diverse collection of organisms that are so tiny and light that they are carried by strong winds high above earth's survace and to places far removed from their natal ranges. |
| strand-line species | species found along beachfronts that are deposited as debris along the shoreline at high tide. |
| phoresy | dispersal of a smaller animal by some form of "hitchhiking" on a larger-bodied species. |
| exozoochory | dispersal of plant propagules that attach to the skin surfaces of mobile animals. |
| endozoochory | dispersal of plant propagules inside the bodies of animals. Some plants adapted for this require scarification or chemical degradation of their seeds inside the animal's digestive tract for germination. |
| diplochory | Species that have two modes of dispersal; e.g., strand-line flora that have colonized the Krakatau islands by floating across the sea, yet also have adaptations for inland dispersal aided by birds or bats. |
| euryhaline | having a tolerance to an extremely wide range of salt concetnrations |
| eurythermal | having a tolerance to a broad range of temperatures. |
| amphitropical | occurring in subtropical or temperate areas on opposite sides of the tropics. |
| habitat selection | the preference of an organism for a particular habitat type. |
| corridor | a dispersal route that permits the direct spread of many or most taxa from one region to another. |
| filter | a geographic or ecological barrier that blocks the passage of some forms, but not others. |
| Great American Biotic Interchange (GABI) | Term used to describe the waves of biotic exchange of terrestrial organisms between Nearctic and Neotropical Regions following the emergence of the Central American Land Bridge roughly 3.5 Ma. |
| sweepstakes route | a severe barrier (unlikely dispersal route) that results in the partly stochastic dispersal of some elements of a biota, and the establishment of a disharmonic biota. |
| apomictic | can produce viable seeds from unfertilized ovules. |
| aero-ecology | a relatively new discipline of the natural sciences that uses recent advances in remote sensing, including various forms of radar, infrared imagery, and ultrasound detection, to visualize the 3D movements of organisms through the aerosphere. |
| active dispersal | dispersal accomplished by energy expenditure by the individual. |
| passive dispersal | dispersal accomplished without energy expenditure by the individual, but instead by means of a stronger force such as wind, water currents, or via a larger animal. |
| dispersion | not a process of movement and dispersal, but the spatial distribution of individuals in a species population. |
Created by:
emcoogan
Popular Biology sets