Inglise keel unit 5 answers
ref to pioneer species / named pioneer;
series of recognisable, seres / stages;
progresses to, climax / final equilibrium stage; max 2
(b) stabilise environment;
soil development / increase humus / organic material;
change soil pH;
hold more water;
release more minerals or nutrients / increase N content or fix N / hold
ions;
form microhabitat / reduce exposure / provide shelter / reduce erosion; max 3
(c) any two from following:
grazing;
burning;
mowing / application of fertilizer / application of selective herbicide;
exposure to wind;
grass able to continue to grow (linked to a statement above); 2
(d) increases;
plants at later stages are large / plants in early stages are small;
trees / shrubs
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