The text and the lecture are about reasons that caused sea otters declination. The text provide two reasons ro suppot the pollution theory of otters declining. However, the lecturer refutes this theoty and states that three reason is predator, ocra.
First, the text says thata lot of sourses of chemical pollution are allonf the Alaskan coast. Thus the chemical pollution could cause immune system of sea otters and as a result to decline populatiion. However, the lecture says thatit it have not found any threatened otter, but if this theory right we should find a lot od daeth animals. Moreover the predator theory explains why we do not find death animals.
Second, the text says that other sea mammals too declined, and it is explained by pollution
First, the text says thata lot of sourses of chemical pollution are allonf the Alaskan coast. Thus the chemical pollution could cause immune system of sea otters and as a result to decline populatiion. However, the lecture says thatit it have not found any threatened otter, but if this theory right we should find a lot od daeth animals. Moreover the predator theory explains why we do not find death animals.
Second, the text says that other sea mammals too declined, and it is explained by pollution