APES Flashcards

16729926065	Types of Natural Selection	directional, stabilizing, disruptive	0
16729926066	adaptive radiation	a process where organisms diversify rapidly into new forms, particularly after a change in the environment that opens up to new niches. often used as a measure of the health of biological systems. THREE LEVELS: Genetic diversity - diversity of genes within a species. Species diversity - diversity among species ecosystem diversity- diversity of a a habitat in a given area	1
16729947926	Biodiversity	the variety of life in the world or in a particular habitat or ecosystem.	2
16729947927	biodiversity hotspots	a region with a significant reservoir of biodiversity that is threatened with destruction. twenty five area of in the world today qualify under this definition. these sites support nearly 60% of the worlds plant, bird, etc. species with a large proportion of endemic species.	3
16729947928	ecological succession	gradual change in living communities that follows a disturbance. May be initiated either by formation of new, unoccupied habitat or by some form of disturbance of an existing community.	4
16730018361	Desertification	Degradation of land, especially in semiarid areas, primarily because of human actions like excessive crop planting, animal grazing, and tree cutting.	5
16730018362	desertification remediation	regulating grazing, slash and burn, anchoring soil, installing sand fences, regulate water resources, planting legumes, installing sand fences, distributing solar cookers.	6
16730018363	Salinization	water that is not absorbed into the soul eventually evaporated and leaves behind dissolved salts in topsoil. symptoms include: stunted crop growth; lower yield; eventual destruction of plant life. Remediation: takes land out of production for 2-5 years, installing underground drainage pipes, flushing soil with fresh water, planting salt tolerating plants.	7
16730018364	Waterlogging	saturation of the soil by groundwater sufficient to prevent or hinder agriculture.	8
16730018365	deforestation	conversion of forests to non-forested areas.	9