Research assistant working on nitrogen exchanges between bacteria and the roots of legumes in the tropical forest of the "La Selva" research station in Puerto Viejo de Sarapiqui, Costa Rica

natural reserve natural area tropical rainforest undergrowth scientific research scientist researcher man person alone core sampling smile outdoor front shot overview day pair of glasses botany march month la selva biological station sieve botanist nature reserves nature reserve nature natural areas ecosystem ecosystems tropical rain forests ombrophile forest shade plants rain forest rainforest rain forests ombrophile forests scientific researches scientific studies scientific study scientists researchers men human beings persons human being human presence human presences human humans single lonely only solo one lone core samplings nicking nick nicks nicked smiling smiles outdoors outsides outside front views front sights front sight front shots front view overviews global sight global sights full length days daytime botanies estación biológica la selva phytologist environment protection environment management biodiversity management environment naturalness area tropical forest forest science individual enumeration take behavior shot ambiance accessory discipline heredia province costa rica central america america tool material