* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 4.3 Succession File
Survey
Document related concepts
Fire ecology wikipedia , lookup
Overexploitation wikipedia , lookup
Habitat conservation wikipedia , lookup
Biodiversity action plan wikipedia , lookup
Ecological fitting wikipedia , lookup
Natural environment wikipedia , lookup
Reconciliation ecology wikipedia , lookup
Biological Dynamics of Forest Fragments Project wikipedia , lookup
Ecosystem services wikipedia , lookup
Ecological resilience wikipedia , lookup
Restoration ecology wikipedia , lookup
Theoretical ecology wikipedia , lookup
Transcript
Succession POINT > Describe primary succession in ecosystems POINT > Describe secondary succession in ecosystems POINT > Define a climax community WB CHECK: Bees help flowers reproduce by spreading pollen. The bees benefit by getting energy-rich pollen. What type of symbiosis is this? Triggerfish move large rocks on the seafloor to find food. Smaller fish, which could not move the rocks, benefit by getting new feeding opportunities. What type of symbiosis is this? What type of symbiosis occurs when you get a mosquito bite? POINT > Describe succession in ecosystems Succession is a series of relatively predictable changes that occur in an ecosystem over time Succession occurs after ecological disturbances or as some species die and others replace them WB CHECK: What is one reason succession occurs? POINT > Describe primary succession in ecosystems Primary succession occurs after a major ecological disruption in an area with no remnants of an older community (Ex. volcanic eruptions, retreating glaciers) POINT > Describe succession in ecosystems Primary succession begins in an area with no remnants of an older community Pioneer species: The first species to colonize lifeless areas ex. lichen POINT > Describe secondary succession in ecosystems Secondary succession occurs when a disturbance disrupts an ecosystem without totally destroying it Seeds and root systems may still be present Ex. after wildfire, hurricane, etc POINT > Describe secondary succession in ecosystems Secondary succession proceeds faster than primary succession because the soil and some species survive the disturbance POINT > Describe secondary succession in ecosystems Succession occurs as one organism alters the environment, and allows other species to compete for resources For example, new grasses grow after a fire. This allows herbivores to move into the area and survive WB CHECK: What is a pioneer species? What type of succession would you expect after a tsunami? Why is secondary succession faster? WB CHECK: What is the difference between primary and secondary succession? a) Secondary succession takes longer to occur b) Secondary succession occurs when remnants of the original ecosystem are still in place c) Secondary succession occurs after an ecosystem has been completely destroyed POINT > Define a climax community A climax community is the end result of ecological succession, and can be very stable POINT > Define a climax community After natural disasters ecosystems often recover to the original climax community After human disruption (like farming) ecosystems may or may not fully recover, depending on the extent of damage WB CHECK: A climax community: a) b) c) d) changes rapidly as the ecosystem changes is dominated by pioneer species only occurs after primary succession can be a stable, long term ecosystem Homework: Read pages 106-109 Assess page 109 #1-2 Workbook Pages 353, 363-366