this knowledge is variously labelled as 'folk ecology', ‘ethno-ecology’, 'traditional environmental knowledge' or 'ecological knowledge', 'indigenous knowledge', 'customary law', and 'knowledge of the land'. traditional environmental or ecological knowledge is probably the most common term; however, there remains no universally accepted definition of the concept. for this work, 'traditional knowledge’ (tk) and some time 'folk knowledge' terms are used interchangeably.