BIO 311D Concept Map -Jasmine George

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GLOBAL WARMING the increase of the global average temperature on Earth

Global Warming Displaces Species Global Warming forces speciesto move into new eranges or alter habitats in ways that could disrupt the ecosystem.

Animals and plants that rely on one another were likely to migrate at different rates, leading to ecological disruption.

Will Lead to Health Hazards in the Furture

higher temperatures will excaberate respiratory ailments such as asthma and bronchitis

Major Tropical diseases likely to spread with an increase in tempteratures; Even a modest global tmeperature increase is epxected to extend the range of vectors

Mortality Rate of heat-related deaths will inrease with temperatures

Pollution in Ecosystems

Subtopic

Humans contribute to the aging of lake by increasing the nutrient level of the lake.

Human Sewage

Laundry Detergetn/Soaps runoff into water -addition potassium into water

Farm Runoff (Fertilizer)

Greenhouse Effect the trapping of heat in the atmosphere by certain (greenhouse) gases

Greenhouse Gases

methane

nitrous oxides

carbon dioxide

CFC's

water vapor

Loss of habitat

Leads to Species Extincitions

Hybridization

Hybridization can save an endangered species, but it can also make one go extinct .

can lead to genetic drift

Genetic Rescue- saving a species on the verge of extinction through hybridization

Species Introduction

Hunting

Exploitation

Abrupt Environmental Change

accounts for mass extinctions

Mass Extinction: 30-40% of species go extinct

POPULATION GENETICS

Hardy Weinberg Genetic Equillibrium: p^2 + 2pq + q^2 = 1 -states genotype frequencies are constant from 1 generation to another

CONDITIONS OF

NO MUTATION

Mutation is the ultimate source of GENETIC VARIATION

Mutation: random changes in genetic code

NO SELECTION

RANDOM MATING

INBREEEDING mating between relatives

NO MIGRATION

movement of genes between populations

migration=gene flow

GENETIC DRIFT

random changes in allele frequencies in a population from generation to generation