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 _____
