Some large seeds produced by tropical trees such as palms and Black probably were ingested whole by former expelled large mammals called gomphotheres.
The gomphotheres weighed over a ton and disperse seeds to great distances.
But these creatures neo-tropical disappeared over 10,000 years ago. So how does the palm trees as black have survived for 10,000 years, if the animals are extinct disperse its seeds?
Recent research has provided the solution for this stale enigma of ecology. All indications are that some rodents may have assumed the job of dispersing seeds that performed the gomphotheres.
Fixing tiny radio transmitters over 400 seeds, team of Roland Kays, a zoologist at the University North Carolina State and the Museum of Natural Sciences North Carolina, and Patrick Jansen, scientist from Smithsonian Tropical Research Institute (STRI) and the University of Wageningen in the Netherlands, found that 85 percent of the seeds were buried, as a depot of food, agoutis, common rodents tropical lowlands.
The agouti transports the seeds with his mouth and bury for when food is scarce.
The radio-tracking revealed something surprising: When rodents dig seeds usually do not eat them, but the move to a new site and re-bury, often many times. In the study there was a seed that was moved from place 36 times.
Some of these seeds have a chance to finish germinating.
The researchers used cameras to monitor the animals and found that the frequent movement of seeds was caused mainly by stealing animals from other seeds.
In the end, 35 percent of the seeds ended more than 100 meters from their home.
The investigation was also worked by Ben Hirsch of Ohio State University, Veronica Zamora Gutierrez and Willem-Jan Emsens of Wageningen University, and Martin Wikelski from the Max Planck Institute for Ornithology in Germany.