(Or) Why are studies on nematodes, except on those of interest in animal and plant parasitology, relatively rare in the South American continent? Is it simply disinterest?
I think interest, time and money are only invested when these organisms affect human, animal or plants' health. One example in Protozoans are the free- living amoebae. Those affecting humans are much more investigated by parasitologists.
My opinion, is that scientists could be interested in a great many different things, but what gets researched is generally influenced by what can get funded. That would be organisms that have commercial value, or which affect humans, livestock or commercial plant crops.
I think free living nematodes is an interesting field for research, but the problem is mostly researchers are more interseted to work on organisms that have direct impact to human life.
Almost 5 years after the question above, we did not arrive at 5 answers indicating how neglected studies related to free-living nematodes are in South America. I am grateful for the comments of colleagues above and I insist on the question: what is the state of the art about? Is it practically null?