Practise IB ESS HL 2.1.17 by applying capture-recapture models, calculating the Lincoln index and testing population-estimate assumptions.
Outline how the abundance of a motile species in an ecosystem can be measured.
abundance of motile organisms can be measured using direct and/or indirect methods;
b. numbers can be counted from aerial images/ satellite images/trigger cameras over a representative area
c. overall population numbers can be calculated from extrapolation to whole area;
d. mark recapture techniques can be used to sample populations / description of Lincoln Index method/equation;
e. method of capture e.g. pitfall trap/live trap/collection of species
f. method of marking with appropriate tag that doesn't affect survival;
g. appropriate time interval between release and recapture