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Unit 6 Lesson 6

Changes in Ecosystems

QuestionAnswer
A drought would most likely cause a herd of wildebeests to migrate further to find food.
What natural disaster might cause a species of fish to move from one pond to another? flood
If soil is present, the type of succession is ... secondary succession
What is the first step in the eutrophication of a pond? excessive nutrients build up in the water
What would happen to the biodiversity of an area if it experienced a volcanic eruption? Biodiversity would decrease
How can you distinguish between primary and secondary succession? Primary succession begins with no soil; Secondary succession has soil present at the beginning.
What does biodiversity indicate about an ecosystem? The ability to survive change.
Is it possible for a pond to become a meadow from eutrophication? Yes
What are examples of pioneer species and what do they do? Lichen and mosses that break down rock into soil.
What happens to the number of species in an ecosystem during succession? The number increases as succession proceeds.
Are ecosystems constantly changing over time? Yes
How do ecosystems change over time? Biological communities are gradually being replaced by other communities.
Which ecosystem likely has the greatest biodiversity and highest sustainability? Rain Forest
How does natural eutrophication affect a pond ecosystem? It causes nutrients to build up.
Created by: lmsraiders