BSC 2011 Lecture Notes - Lecture 33: Extinction Vortex, Genetic Drift, Allele Frequency

• School: University of Florida
• Department: Biology - Biological Sciences
• Course: BSC 2011
• Professor: Norman Douglas, Nicole Gerlach, Todd Palmer

Document Summary

Harsh environmental conditions can wipe out small populations. Genetic drift: loss of alleles by genetic drift, some alleles may be important for population persistence. Rare drought resistance allele in some populations. Inbreeding depression: the production of inherited deleterious traits in offspring as a consequence of close relationships between parents. Effective population size: us(cid:272)epti(cid:271)le to the (cid:862)e(cid:454)ti(cid:374)(cid:272)tio(cid:374) vorte(cid:454)(cid:863, at small populations allee effects occur. Do(cid:374)"t get the (cid:271)e(cid:374)efits of pa(cid:272)k hu(cid:374)ti(cid:374)g. Declining population approach: emphasizes the factors that are causing population decline. Develop hypotheses for possible causes of decline. Test the most likely causes for experimental populations. Apply the results to management strategies and monitor: theory of reserve design. Distance from the mainland: close vs far. Shape: lots of edge vs little edge. Connectivity: single large vs several small, corridors to connect or not to connect. (cid:862)better(cid:863) solutio(cid:374) is o(cid:374)e of the left pairs. Biodiversity occurs outside of the protected areas. A(cid:374)i(cid:373)als do(cid:374)"t pa(cid:455) atte(cid:374)tio(cid:374) to reserve (cid:271)ou(cid:374)daries.