Sentences with phrase «keep prey populations»

As an essential part of the marine ecosystem, they keep food webs in balance, keep prey populations healthy, and keep sea grass beds and other vital habitats healthy, for starters.

The idea is that the new grizzly bears would fill the same ecological role as their vanished relatives, as omnivores that spread seeds, break up soil and keep prey populations in check.

Not exact matches

That did not happen: there is no geological record of a world - wide flood, there is not enough diversity to regenerate the population we currently, there is not enough water to cover the earth to the height of Everest, the logistics of retrieving and returning animals to the then - unknown Americas, Australia, etc. were staggeringly difficult, managing the animals on the Ark was impossible — a few humans keeping predators from their prey, cleaning the waste, etc., pretty much all life on earth would have been killed, etc. etc..

According to the popular logic, the wolves preyed on elk, keeping the grazers» populations in check, which allowed dwindling aspen populations, and the beavers that fed on them, to rebound.