Detailed text transcripts for TV channel - DW - 20190702:04:38:00
Chain they belong to and are often replaceable so what makes the order as a keystone species. by the hunted for that benefit the biggest in the animal kingdom c orders had been driven to near extinction by the end of the 19th century . in the 1973 american marine biologist james estus did a survey of sea floors around islands rissi autos had survived and those in which they had disappeared what he found was that around islands that lacked the op does that mean pre sea urchins had was the increase in size and number resulting in the almost complete disappearance off forests all that was left we...
Source: archive.org