'We did not expect the cleared forest area to ever recover,' said a scientist who studied the primates.
More and more parts of tropical forests are being demolished to make way for human activity, from the construction of hydroelectric dams and roads to farming,Sometimes these woody areas can't repopulate naturally. If they can, plant seeds must somehow be spread: and animals play an important part in this. First, animals such as bats and birds might defecate as they fly over an area, leaving behind seeds. As plants grow, they attract animals such as primates.
Over a period of 20 years, the researchers studied how these two species of monkey interacted with the repopulating pasture. As more plants emerged, the team found the monkeys used the deforested area increasingly, bringing with them seeds from the existingforest and compared them to the plants in the existing forest. The team noted that different plants of the same species had varying heights, suggesting the seeds from which they emerged were brought to the area in different years.
"However, the study shows how important data collection and investigations over a very long period of time are in order to be able to make reliable statements about slowly developing ecological processes," he said.
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