Chapter 7 Flashcards
Algal Bloom
A rapid increase in the population of algae or other micro-organisms at the surface of a water body, that blocks sunlight from entering.
Anoxic
Completely devoid of oxygen
Biological Control
A method of pest control in which another species is introduced that can control the population of the pest species
Biomagnification
The sequence of processes in an ecosystem by which higher concentrations of a particular non-biodegradable chemical accumulate in the tissues of organisms higher up the trophic levels
Bottom trawling
A destructive metho of fishing which invloves dragging a large net across the seafloor
Bush corridors
The strips of regenerated land between isolated habitats that reconnect subpopulations, returning habitat to populations and enabling subpopulations to interbreed
By-catch
The unwanted fish and other marine creatures trapped by commercial fishing nets during fishing
Captive-breed-for-release
Describes a program designed to provide additional animals for release into the wild to establish new populations or to augment existing ones
Chemical Control
A chemical, such as a pesticide or poison, that is used to control the population of a pest or invasive species
Climate
The average, long-term, predictable atmospheric weather conditions at a site over a long period of time
Climate change
A significant change in the global climate that can be identified by changes in the average.
Culling
A conservation management strategy involving the killing and removal of individuals in a population in order to reduce the negative impact the animal is having on an ecosystem
Culling
A conservation management strategy involving the killing and removal of individuals in a population in order to reduce the negative impact the animal is having on an ecosystem
Deforestation
The permanent removal of standing forests
Enhanced greenhouse effect
The intensified version of the natural greenhouse effect.
Caused by:
Increased of greenhouse gases in the atmosphere from human activity
Eutrophication
The process that occurs when excess nutrients particularly phosphorus, enter a body of water and become highly concentrated, leading to excess growth of organisms such as algae,
Fossil Fuels
Natural energy sources, formed from fossilised living things
Fragmentation
The separation of some parts of the habitat of an ecosystem into isolated sections
Global Warming
The steady rise in global average temperature in recent decades
Greenhouse effect
The insulating effect of greenhouse gases in the atmosphere, which prevent some of the solar radiation from escaping Earth’s atmosphere
Greenhouse gases
The gases that trap heat from the sun and keep Earth's surface warm Carbon dioxide Nitrous oxide Water Methane
