Succession Webquest
primary succession: __________ in habitat secondary succession: ____________________ of a community that has been disturbed
barren; reestablishment
Secondary Succession follows the ___________ or partial destruction of the _________________ by some sort of disturbance, like a ______, _____________, or _______ that leaves the soil ___________.
destruction; vegetation area; fire; windstorm; flood; intact
AS SUCCESSION PROCEEDS THE AREA BECOMES MORE______________ AND IS ABLE TO SUPPORT MORE COMPLEX __________________
diverse; food webs
Succession occurs on _______ scales involving ___________ plants and animals, but may involve ____________ communities on a smaller scale.
large; higher; microbial
• Primary Succession follows the formation of ________________________ consisting of _______, _______, ____________________, _______, _______, or some other exclusively ____________ substrate. o This means that there is ___________ present. o Soil is a mixture of _________ material, ___________________ material, and ________ organisms.
new land surfaces; rock; lava; volcanic ash; sand; clay; mineral; no soil; mineral; decaying organic; living organisms
Alder trees perform _____________ which improves the soil ___________ allowing for _____________.
nitrogen fixation; quality; spruce tree growth
Species composition tends towards a ________________________ through succession.
Climax Community
examples of secondary succession: - -after ____________ - - - -
abandoned farm; harvesting; fire; flooding; logging; hurricane
change in the species composition of a community over time
ecological succession
The climax community describes an _______________ of succession that persists until disturbed by _____________________.
end product; environmental change
secondary succession is ____________ than primary succession
faster
• Pioneer species initiate ____________ following disturbance in both __________ AND _________ successions Pioneers "______________" for later colonists by altering the ________ and ___________- environment: o _______________________ (decreases erosion) their roots accelerate soil formation o soil ______________ enrichment (organic matter and biological _____________) o increased _____________________ o ________ availability o _________________ o exposure to _______
recovery; primary; secondary; pave the way; biotic; abiotic; soil stabilization; nutrient; organic matter; nitrogen fixation; moisture holding capacity; light; temperature; wind
Bog Succession is ____________
secondary
examples of primary succession: -newly formed _______________________ -____________ retreat -_______________
volcanic island; glaciers; lakes dry up
Characteristics of a Bog Area: ______________ areas characterized by ________ and __________ matter. remain __________ for a while and then develops grasses, shrubs, and then finally trees. Water is diverted because the beavers build dams which causes __________ in the valley and ___________ the vegetation. Over time deeper rooted trees are able to grow until eventually it is a _________ with a narrow ___________.
waterlogged; mosses; organic; wetlands; flooding; waterlogs; forest; stream
