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13 Cards in this Set

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Conservation biology

is a goal-oriented science that seeks to counter the biodiversity crisis, the current rapid decrease in Earth's variety of life

Habitat loss

Human alteration of habitat is the single greatest threat to biodiversity

Introduced species

invasive/nonnative/exotic species

Overexploitation

Harvest wild plants/animals

Global change

Alter climate, atmosphere, and ecological》reduce Earth's capacity to sustain life

Movement corridors

Can promote dispersal if habitats are fragmented

Eutrophication

Excess nitrogen from agriculture enters aquatic ecosystems

How does acid precipitation affect the environment?

1. Caused by burning of wood and fossil fuels》release sulfur oxides and nitrogen oxides


2. React with water in the atmosphere to produce sulfuric and nitric acids


3. Rain, snow, or fog with a pH less than 5.6

Biological magnification

1. Toxins become more concentrated in successive trophic levels of food web


2. Toxins can't be broken down and magnify in concentration up the food chain


3. Problem: mercury in fish

Human activities are depleting atmospheric ozone

1. Life on earth is protected from the damaging affects of ultraviolet radiation (uv) by a layer of O3, or ozone


2. Chlorine-containing compounds erode the ozone layer

Greenhouse effect

1. Absorbing of heat the Earth experience due to certain greenhouse gasses.


2. CO2 and water vapor absorb infrared radiation and re-reflect back towards earth.


3. The Earth needs this heat, but too much could be disatrous.

What are some negative affects of greenhouse gasses?

1. Studies predict doubling of CO2 in the atmosphere will cause a 3°C increase in the average temperature of earth


2. Rising temperatures could cause polar ice cap melting, which could flood coastal areas

How to fix global warming

Stabilize use of fossil fuels and reduce deforestation