它比主水体或远洋区的生物总产量要少一些。
With warm, buoyant water on top and cold, dense water below, the water column doesn mix easily.上层水温暖而浓度小,下层水寒冷而浓度大,因此水体难以混合。
"Whales, on the other hand, often feed at depth," says Roman. "So they feed low in the water column."“另一方面,鲸鱼通常在深海觅食,”罗曼说:“它们在深水层吃东西,在海面附近排便。”