aice environmental management unit 4

gross primary productivity

gross primary productivity

all production by producers

net primary productivity

GPP-R

abiotic factors that affect productivity

carbon dioxide, water, and sunlight

explain primary succession

no soil present, pioneer species: moss and lichen (break down rock into soil), takes a very long to reach climax community

secondary succession

soil present, pioneer species: small plants, takes shorter time to reach climax community (due to presence of soil).

pyramid of numbers

represents number of individual organisms in an ecosystem.

name major abiotic factors of a biome

temperature and precipitation

does the rainforest soil have low moisture content?

no, it’s high

does the tropical rainforest soil have a high decomposition rate?

yes

the rainforest has high biodiversity because…?

• Multiple layers in the tall trees vary sunlight

• multiple layers lead to more habitats.

reasons for deforestation

• urbanization -

• farming -

• mining

• to build new roads

• new wood materials

benefits of conserving tropical rainforest

• protect biodiversity

• preserve medicinal plants

• food security

• help combat climate change

• ecological services

• maintain biodiversity.