Section 3

the process of one ecological community gradually changing into another

define ecological succession

climax community

during a secondary succession ____________________________ might develop over time

aquatic succesion

freshwater ecosystems change over time in a natural predictable process called _______________________

algae, succession

high nutrient levels in freshwater bodies support large populations of _____ and other microscopic organisms when these organisms die their bodies decay and add up to the burnup of the soil speeding up ________________

nutrients

humans contribute to eutrophication wen fertilizers or pollution run-off onto a lake or pond increasing the ____________ concentrations

forest

open feilds might become a ___________if they are left undisturbed

top

plants help build the ______ layer

as a plant dies new species grow in place

relate how a stable climate affects plant life in a climax community

mosses, ferns,soil,water

spores of _________and ___________germinate thhese organisms add tothe _____when they die. Soil can now hold _________

type of biome

Climax Communities differ depending on the __________________________that they occur in

lava

After a volcano erupts molten ____ cools and hardens into bare rock

soil, grasses, animals, shrubs, trees , climax community

After many years, ______is deep and has enough__________ to support ________,_____________,________________,__________________move in eventually there becomes a ______________________

soil

Broken-down Rock and nutrients from decaying soil help create _______

Climax Community,new plants

The final stage of succession in a land ecosystem is the _______________________which is stable for long periods of time, in these communities________________of the same species replave each other over time

Pioneer Species, Lichens, Mosses

The first species that colonize new or undisturbed land are ____________________. These species include _________ and ___________

sediments, remains

___________ carried by rainwater and streams accumulate on the bottom of lakes and ponds and wetlands the _______ of dead organisms add to the buildup of soil

lichen,acid

____________ spores are carried by wind and settle on rock. Lichens release ____ that break down the rock

eutripication

________________ is the process of a body of water becoming nutrient rich

secondary succession

____________________ takes place in areas where ecosystems have been disturbed

airborne spores

_____________________ from mosses and ferns settle in thin soil on the side of a volcano and plants soon sprout

Primary Succession

_______________________ is the ecological succession that occurs in areas where there are little to no soil

Ecological Succession

________________________ is the process of one ecological community changing into another

lichens spores, rock, nutrients

_____________carried on the wind settle lichens break down______ and add _______ to the soil

plants

after many years the soil is deep enough for many types of _____ to grow

bare rock

after volcano erupts cools and hardens into ____________

nutrients

as decaying organisms fall to the bottom of a wetland lake or pond they add _________ to the water

land

as time passes more and more soil accumulates eventually so much has collected it becomes _____