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by BlastRoom
Tell primary succession from secondary, follow a site from pioneer species to climax community, and see what resets the clock.
#biology
20 questions
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An underwater eruption builds a new island of cooled lava out of the open sea. Over the next forty years, living things appear on its bare surface. What type of succession is happening on the island?
A hurricane snaps and blows down most of the trees in a coastal forest. The soil layer, the buried seeds in it and many of the root systems are left in place. What type of succession follows on that site?
Which site would begin primary succession?
A gravel lot where every bit of soil was scraped away years ago is now spotted with lichens and mosses growing directly on the stone. This site is undergoing primary succession.
The diagram shows what grew on one field after it was plowed for sixty years and then abandoned. The soil and the seeds buried in it were never removed. What type of succession does the diagram show?
The diagram shows a new sand dune building on a lake shore, where no soil is present when the process starts. Which type of succession is this, and which stage is the pioneer?
The diagram tracks a rock surface uncovered by a retreating glacier. Which stage belongs at the blank?
One stage in the diagram has been put in the wrong place. Which two stages should trade places so the sequence is correct?
The timeline follows a forest site after a wildfire. Which event belongs at the blank in 2020?
The diagram shows succession on a rockslide. Which stage belongs at the blank at the end of the sequence?
In an abandoned New England pasture, white pines take the site first and hardwoods such as oak and maple replace them decades later. Why do the hardwoods eventually take over?
The blank stage in the diagram is the first group of organisms to live on the cooled lava. What are those organisms doing to the site at that stage?
Why can lichens live on a bare rock face where grasses cannot?
Generation after generation of pioneer lichens and mosses grow and die on a bare rock surface. What does this do to the site?
Which organism is most likely to be acting as a pioneer species on a lava flow that cooled last year?
The timeline follows a single site over a century. Which event belongs at the blank in 1975, and what does it begin?
What is a climax community?
Two sites are the same size and in the same climate. Why does the one recovering from a fire usually reach a mature community faster than the one recovering from a glacier?
On the same site and in the same climate, primary succession reaches a mature forest faster than secondary succession does.
A forest has been stable for 150 years. Which event would restart succession there without removing the soil?
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Aquatic Ecosystems
20 questions
