Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
Conservation |
1. The act or process of conserving 2. a. Preservation from loss, damage, or neglect b. The controlled use of and systematic protection of natural resources, such as forest, soil, and water systems 3. The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change |
|
|
Natural Resource |
A material source of wealth, such as timber, fresh water, or a mineral deposit, that occurs in a natural state and has value |
|
|
How long have humans had a global impact? |
~40,000 years (more so in the last 20-15,000 years) |
|
|
What are some of the main factors in the disappearance of the Pleistocene large animals? |
Hunting by humans, climate change, parasites, disease |
|
|
What does endemic mean? |
Restricted to a certain area |
|
|
What were the main global impacts humans had in Europe? |
Land, mercury (to help pull out precious metals), timber (to make charcoal) |
|
|
What was the main global impact humans had in North American |
Loss of tall grass prairies |
|
|
What is the human ecological footprint? |
1. Loss of biodiversity 2. Loss of natural habitat (#2 impacts #1 directly and indirectly) |
|
|
4 reasons for optimism |
1. Population growth rates are actually decreasing in many countries 2. Biodiversity and natural resource impacts aren't due as much to numbers of people but how and where they live 3. Birth rates are often a result of socio-economic patterns 4. Conservation awareness is increasing and has become politically and economically important |
|
|
Stewardship |
Responsible management of natural resources |
|
|
Anadromous |
Fish that are born in fresh water but live in salt water (Ex: salmon) |
|
|
Catadromous |
Fish that are born in salt water but live in fresh water |
|
|
Epigenetics |
Study of the change of gene expression, above and beyond the nucleotide sequence |
|
|
Utilitarian Value of Biodiversity |
(Instrumental) Value of means to an end - biodiversity is useful for something...we can make money off of it |
|
|
Intrinsic Value of Biodiversity |
(Inherent) Value is end in itself - more ethical...nature for nature's sake |
|
|
Human Intrinsic Value |
"Everything is for us" |
|
|
Anthropocentric view of biodiversity |
Biodiversity has value only as means to human's end...What is the value? Better to keep it or not? |
|
|
Biocentric view of biodiversity |
Biodiversity valuable because it exists - never completely biocentric, still through human eyes |
|
|
Common denominator of all organismal diversity |
Genetic diversity |
|
|
Most typical diversity |
Allelic diversity |
|
|
Top 2 reasons for loss of biodiversity |
Habitat loss and invasive species |
|
|
Adaptive radiation |
Better partitioning of resources (reason why many resource poor environments can have high biodiversity) |
|
|
Biome |
Largest ecological unit containing a dominant indicator vegetation or physiotype |
|
|
Benthic zone |
Lowest level of a body of water |
|
|
Pelagic |
Out in the middle of nowhere |
|
|
Vagile |
Able to move far distances easily |
|
|
Reasons for amphibian loss? |
1. UV radiation 2. pollution 3. predation 4. introduced species 5. pathogens |
|
|
Souce |
high quality habitat that allows for increase in population |
|
|
Sink |
low quality habitat that could not support a population on its own |
