Madrid of dust humble company released a problem to be on June 1 " dump of climate change, waste, excessive catch: The challenge that ocean faces " the article says, when World Environment Day is coming on June 5, the expert points out to reporter of dust humble company, climate change may change the oxygen in ocean current and ocean generate, at the same time the future of marine health still is faced with a few otherer the challenge that the problem brings, for example excessive catch and plastic rubbish and industrial waste dump. |
The article says, the Mediterranean climate change of subordinate of institute of Spanish ocean science studies the group issued a report a few days ago, collect come nearly 30 years the data that in studying an activity, ocean obtains. Should report those who pointed out marine temperature and salinity is elevatory, and the influence of systems of these trend opposite state: From the change ocean current goes to those who rise temperate zone to come " blanch " effect brings about coral to die, and the difficulty that maintains photosynthesis course. Photosynthesis is the foundation of food chain, can produce the oxygen of on the earth 50% .
Mannuaier Baerjiasi tells the physicist of institute of science of ocean of one of authors of this research, Spain reporter of dust humble company, mediterranean is in with " warm up 100 every years the speed of about 2 Celsius " calefacient, this one trend compares system of water of other and large ocean " more apparent " , and this meeting affects briny salinity and " may change ocean current " , because the temperature of surface layer seawater and salinity are elevatory " formed bigger temperature and density difference with deep-seated seawater " , and block up of these two administrative levels " mix " .
But, it is necessary that this kind mixes, because " deep-seated seawater place contains oxygen very few, but nutrient material is rich " , and these nutrient material are to live in surface layer seawater what the medium, one-celled alga that can produce a large number of oxygen needs.
Scientific institute also is in Spanish ocean at present the menace that studies this kind of temperature rises to be formed to marine animal. Baerjiasi is with pilchard exemple say, pilchard is a kind of fish that lives in cold water area, "Need just can lay eggs below inferior temperature " , because this seawater warms up block up pilchard group develop.
The article says, another result with briny elevatory temperature is, warm up cause " blanch " effect causes coral death. As briny heated, coral can release a form inside algal, this will bring about anthozoan to die in great quantities, cause cay to degrade whiten.
Spanish biologist Maria Makesi is Malaya one of members that a coral resumes a project. She points out, the ecosystem that this kind of circumstance offers to coral serves a function (include to provide food, protection coastal habitat) caused " ruinous effect " , this goes to the influence " the marine species of 25% " .
According to the data of U.N. , in going 10 years, the underwater ecosystem that has 30% has disappeared, and of odd part 90% the likelihood disappears before 2050. This one process also will make the fisherman is affected. They see ecosystem is being drawn out empty, the fishing that catchs is obtained less and less.
Makesi says, this damaged the development of socioeconomy, make people use provide invasive technology to fish more, "These methods make in short-term internal energy they obtain more fishing to obtain, but the state of can farther exasperate cay " .
Makesi still points out, in ocean plastic rubbish increasingly the problem aggravate of grow in quantity of biology diversity decrease, this affected the health of whole water system.
Another problem that ocean faces is the influence that comes from industrial waste dump, wait in mediterranean especially " close " maritime space, oxygen is mixed over there of seawater it is more difficult to update.