B18 - Biodiversity and Ecosystems Flashcards
1
Q
why is human population growing?
A
- no natural predators
- better living conditions
- less infectious disease
- growing lots of food
2
Q
what is biodiverity?
A
a measure of the number of the different species in a habitat/ecosystem
3
Q
what is pollution?
A
substances which has harmful or poisness effects to the enviroment
4
Q
what is bioacculilation?
A
the build up of toxins in a food chain
5
Q
how do we know if water is polluted?
A
- oxygen levels
- Ph levels
- indication species: organisms that are sensitive to the effects of pollution
6
Q
what is deforestation?
A
the destorying and cutting down trees in a large area, natural forests
- logging, burning
7
Q
effects of deforestation?
A
- contributes to climate change
- release carbon dioxide into the atmosphere
- less photosynthesis to remove carbon dioxide
- biodiversity getting destoryed
8
Q
what is peat?
A
made up of plant meterials that cannot decay due to acidic or anoxic conditions
9
Q
what 2 gases contribute to global warming?
A
- carbon dioxide
- methane
10
Q
what is the greenhouse effect?
A
when greenhouse gases get absorbed and trapped into the atmosphere like carbon dioxide and methane
