BBC蓝色星球纪录片英文观后感

The review of the blue planet by BBC

Our earth actually is a blue planet, which is covered with 71 percent of the world by brine. How vast such superficial content! Therefore, the mysterious field is composed of numerous parts, such as various marine animals and many different plants. This means a truth that we can’t neglect the effects alerted on the ocean by the creature and some terrestrial beings along the coast.

Food links, complex food net, describe relationship running through the animal-kinds, from plankton to the hugest sort, blue whale, approximately. To my surprise, blue whales, such a formidable giant, rely on millions of krill. Such gargantuan harvests depend on the continuing fertility of the ocean. There exists much amazing association between two species like this. Generally, grey whales are much bigger than killer whales. But 15 killer whales can trace an adult female grey whale several kilometers just for her baby. They chase the young until he can’t swim any longer because of toil. Whales b reathe with lung, as is known. These killer whales try their best to press the baby grey whale to make his head in the sea. At last, the young whale dies of oxygen-poor. His mother can not do anything about it and continue her journey north for food, leavi ng the child’s body behind. She has no choice to give up the one who she had conceived for thirteen months.

Moreover, the living in the water is usually classified according to their ambient living environment. In the abyssal area, large ranks of transparent lives lead a rich and varied life. Among the group, imitation is a necessary skill to confuse the enemy and attain what they want. These guys may imitate the surroundings or just copy the color around them. Some fish have special luminous organs, which function as viewfinders, hiding in the dark. They reflect the weak blue light from water surface and slightly disappear along with it. Some striped mullets and jellyfish have the ability to flash like neon light. Their motion is excellent in disguise. Most of them move slowly relatively. As the depth rises, the quantity of living grow gradually with the sunlight brightening and energy strengthened.

In the shallow sea, battles happen every day almost. Various animals join in the cruel conflict. As is commonly seen, bands of sardines used to take action together for safety. It’s not, nevertheless, an ideal method. Bottlenose dolphin and whales unintentionally work in conjunction with each other. Dolphins are in charge of getting the sardines apart, making use of waves foam. Whales can enjoy the dish much more easily. Smart seabirds fly low, pressing close to the water, to find the best location to seize the prey. After that, they rush into the water like spurting arrow. The hunters grab their relish to the habitat. Meantime, besides food link, there coexists symbiosis. Sea-gull and half-moon can help other fish by cleaning the mould on the cover.

What is vividly introduced above occurs in the diverse layers, while the layers are not alone, in touch with each other instead. Ocean current becomes the key factor to mix the brine from distinct areas. Nutrition blends to a new balance. Of course, this results in energetic fishing ground. Fish shuttle up and down, making water world filled with vitality and more oxygen dissolved.