id	keyword
biotropia-486	valves
biotropia-486	diatom
biotropia-486	lake
biotropia-486	species
biotropia-486	rawapening
biotropia-486	number
biotropia-486	count
biotropia-486	site
biotropia-486	minimum
biotropia-486	analysis
biotropia-486	soeprobowati
biotropia-486	water
biotropia-486	efficiency