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 sit outdoor overview day observe pair of glasses three quarter shot botany rain boots 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 seat siting outdoors outsides outside overviews global sight global sights full length days daytime observed observing be careful being careful three quarter views three quarter view three quarter shots three quarter sight three quarter sights three quarter length botanies rainy boots rubber boots estación biológica la selva phytologist environment protection environment management biodiversity management environment naturalness area tropical forest forest science individual enumeration posture behavior shot ambiance accessory discipline heredia province costa rica central america america tool material