Quick-Fire Review: Invasive Species and Biodiversity
A plant can arrive from another country, settle in, and do no harm at all. Alien and invasive are not the same word.
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Quick-Fire Review: Invasive Species and Biodiversity
This is a fast pass through the invasive species, biodiversity and conservation material in Environmental Systems and Societies, with eleven questions, each one followed by the answer and the reasoning that earns the mark.
What this review covers
Invasive species and native communities. What separates an alien species from an invasive one, why island wildlife is so easily overwhelmed, and how biological control can backfire.
Measuring and reading biodiversity. What the word biodiversity actually includes, how to work out Simpson's diversity index from a quadrat count, and why two sites with the same species count can still differ.
Keystone species and damaged food webs. The sea otter and the kelp forest, why cutting a wood into small patches lowers its diversity, and how invertebrates and lichens act as indicators.
Protecting and restoring. In-situ against ex-situ conservation, and the order of control for an invasive species that is already in.
How to use it
Answer each question before the host gives it away. The pause is there for exactly that. If you get one wrong, the reason that follows is the part worth repeating, because that is where the marks live.
The ones that catch people out are alien against invasive, evenness inside the diversity index, and prevention coming before control. Each of those turns on a single word, so say that word out loud before you say the answer.
Replay the whole thing the night before, and once more on the way to the exam.
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