
1) Ecological experiment
Found on
https://www.crosswordclues.com/clue/chronosequence

A chronosequence (in forest sciences) is a set of forested sites that share similar attributes but are of different ages. Since many processes in forest ecology take a long time (decades or centuries) to develop, chronosequence methods are used to represent and study the time-dependent development of a forest. Field data from a chronosequence can ...
Found on
http://en.wikipedia.org/wiki/Chronosequence
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