1. 描寫海洋被污染的段落
具體如下:
1,、垃圾污染
工業(yè)冷卻水和工程殘土,、垃圾及疏浚泥等。前者入海后能提高局部海區(qū)的水溫,,使溶解氧的含量降低 ,,影響生物的新陳代謝,,甚至使生物群落發(fā)生改變,;后者可破壞海濱環(huán)境和海洋生物的棲息環(huán)境,。
2、噪聲污染
利用天然聲納進(jìn)行導(dǎo)航和捕獵,,讓無脊椎動(dòng)物深受其害??碧酱a(chǎn)生的聲音污染對頭足類動(dòng)物以及其他海洋動(dòng)物的生存造成不利影響,。
3、過度捕撈
人類的捕魚活動(dòng)導(dǎo)致海洋中生存的某種魚類種群不足以繁殖并補(bǔ)充種群數(shù)量?,F(xiàn)代漁業(yè)捕獲的海洋生物已經(jīng)超過生態(tài)系統(tǒng)能夠平衡彌補(bǔ)的數(shù)量,,結(jié)果使整個(gè)海洋系統(tǒng)生態(tài)退化。
4,、冰川融化
由于冰蓋的融化,,奇特的低鹽度海水正在慢慢的消失,截止到2002年,, 96%的低鹽度棲居環(huán)境已經(jīng)消失殆盡,。大部分以冰川徑流作為供水源的地區(qū)將會(huì)發(fā)生嚴(yán)重的缺水危機(jī)。
5,、石油泄漏污染
石油污染在海洋表面形成面積廣大的油膜,,阻止空氣中的氧氣向海水中溶解,同時(shí)石油的分解也消耗水中的溶解氧,,造成海水缺氧,,對海洋生物產(chǎn)生危害,,并禍及海鳥和人類。
2. 海水被污染的句子
1,、滔滔白浪從天際滾滾而來,,銀白皎亮的波濤推涌追逐,漸漸由遠(yuǎn)而近,,越近越高,,越高越響,宛如千軍萬馬挾著雷鳴一般的轟然巨響奔騰而至,。
2,、一層層的浪濤向遠(yuǎn)處擴(kuò)展延伸,慢慢平息下去,,像是喘一口氣似的,,留下一片轉(zhuǎn)瞬即逝的泡沫,還有搖晃著的海藻的霉腥味,。
3,、愛心是暗夜大海中燈塔上的一盞明燈,使驚濤駭浪中的水手們看到重生希望,。
4,、洶涌澎湃的浪花不斷地拍打著海岸。
5,、大海有時(shí)像一頭咆哮的猛虎,,洶涌澎湃,掀起陣陣狂瀾,,洶猛的海浪不時(shí)拍打著礁石,,它,濺起一片片晶瑩的浪珠,;有時(shí)又像一位溫柔的媽媽,,讓海浪歡快的跳躍。
6,、平靜的海面上忽然狂風(fēng)大作,,大海變的洶涌澎湃起來,海水以排山倒海之勢壓過來,,嚇的新船員們心驚肉跳,。
3. 描寫海洋被污染的段落摘抄
來自長江和省內(nèi)6大水系所攜帶的大量工農(nóng)業(yè)廢水和生活污水排入海中,使我省87%的近岸海域受到不同程度的污染,,基本已無I類海水,,沿海特別是河口海水中無機(jī)氮和無機(jī)磷嚴(yán)重超標(biāo),海水中磷酸鹽合量在沿海省,、自治區(qū)和直轄市中排居首位,。
近岸海底沉積物中氮,、磷超標(biāo)嚴(yán)重,成為海水二次污染的潛在危害源,。另外,,個(gè)別海域(如杭州灣和舟山海域)船舶排污及碰撞漏油,海上石油開采溢油等加劇了近岸海域的污染,,有機(jī)污染和重金屬也對海水水質(zhì)產(chǎn)生明顯的影響,。
海洋災(zāi)害頻繁——每年發(fā)生大小赤潮近20次
我省是風(fēng)暴潮、赤潮等海洋災(zāi)害最為嚴(yán)重的省份之一,。每年因臺(tái)風(fēng)給我省海洋漁業(yè)造成的直接經(jīng)濟(jì)損失在數(shù)十億元以上,。由于海水水質(zhì)下降和富營養(yǎng)化,導(dǎo)致赤潮災(zāi)害發(fā)生的頻率逐年上升,,給我省的海洋經(jīng)濟(jì)帶來巨大的損失,,近年來,每年發(fā)生的大小赤潮災(zāi)害近20次,,年直接經(jīng)濟(jì)損失達(dá)數(shù)億元,。
圍海造地——許多珍稀瀕危野生生物絕跡,破壞生態(tài)
我省沿海灘涂資源359.04萬畝,,主要分布在錢塘江和杭州灣兩岸,,以及各海灣。由于不合理的圍海造地,,使沿海自然灘涂濕地面積縮減,,不僅破壞了多種鳥類的棲息地,也使重要的經(jīng)濟(jì)魚,、蝦,、蟹和貝類生息、繁衍場所消失,,許多珍稀瀕危野生生物絕跡,而且大大降低了灘涂濕地調(diào)節(jié)氣候,、儲(chǔ)水分洪,、抵御風(fēng)暴潮、凈化地表徑流及護(hù)岸保田等的能力,,同時(shí)改變了海區(qū)的水動(dòng)力方向,,加速了航道和港口的淤積。
海洋食物鏈已經(jīng)遭到嚴(yán)重破壞——經(jīng)濟(jì)魚類資源大幅度降低
隨著海洋開發(fā)話動(dòng)的增多,,海洋生態(tài)環(huán)境遭受破壞,,使生物多樣性衰減,某些生物種類已近絕跡,,傳統(tǒng)的經(jīng)濟(jì)魚類資源大幅度降低,,再也形不成漁汛,,海洋食物鏈已經(jīng)遭到嚴(yán)重破壞。東海生態(tài)系統(tǒng)中的主要經(jīng)濟(jì)物種嚴(yán)重衰竭,,整體結(jié)構(gòu)發(fā)生顯著變異,,系統(tǒng)內(nèi)部自我調(diào)節(jié)的能力受到嚴(yán)重?fù)p害。
請勿將廢水和生活垃圾直接排入海中
造成海水如此惡劣的污染源主要有陸上和海上兩大類,。陸上污染源主要是工業(yè)污水,、居民的生活廢水以及農(nóng)田中使用的農(nóng)藥通過河流流入大海,沿海企業(yè)和居民直接將污水和廢水排入海中,。海上的污染源主要有船舶上和港口的油污和生活廢水,,養(yǎng)殖場、海洋工程,、海岸工程產(chǎn)生的污染,。
為了使我們的海域不再受污染,省有關(guān)部門已經(jīng)頒布了一系列的政策法規(guī)對海域污染進(jìn)行了治理,。同時(shí)也提醒沿海的居民不要將廢水和生活垃圾直接排入海中,,出海的漁民應(yīng)該把該回收的都要回收,而不要一丟完事,。
4. 描寫海洋被污染的段落200字
是石油,,進(jìn)入海洋的石油在海浪、海流作用下擴(kuò)散形成很薄的油膜覆蓋在海洋表面,,不僅隔絕了大氣與水的氣體交換,,也由于自身的生物分解和氧化作用消耗掉海水中含有氧氣,造成海水中氧氣含量的大幅度下降
5. 描寫海洋被污染的句子
海洋污染物依其海洋污染來源,、性質(zhì)和毒性,,可分為以下幾類:
①石油及其產(chǎn)品(見海洋石油污染)。
②金屬和酸,、堿,。包括鉻、錳,、鐵,、銅、鋅,、銀,、鎘 、銻 ,、汞 ,、鉛等金屬,磷,、砷等非金屬,,以及酸和堿等,。它們直接危害海洋生物的生存和影響其利用價(jià)值。
③農(nóng)藥,。主要由徑流帶入海洋,。對海洋生物有危害。
④放射性物質(zhì),。主要來自核爆炸,、核工業(yè)或核艦艇的排污。
⑤熱污染和固體廢物,。主要包括工業(yè)冷卻水和工程殘土,、垃圾及疏浚泥等。前者入海后能提高局部海區(qū)的水溫,,使溶解氧的含量降低 ,,影響生物的新陳代謝,甚至使生物群落發(fā)生改變;后者可破壞海濱環(huán)境和海洋生物的棲息環(huán)境,。
⑥有機(jī)廢液和生活污水,。由徑流帶入海洋。極嚴(yán)重的可形成赤潮,。
6. 描寫海洋被污染的段落有哪些
污水給魚兒帶來的只有死亡,,如果人們吃了被污染的海里的魚,大多數(shù)會(huì)生病的就海洋污染而言,,是個(gè)大問題呀,!海洋生物物種一旦遭難,生態(tài)就會(huì)失去平衡,,也許會(huì)就此產(chǎn)生新物種來適應(yīng)這種惡劣環(huán)境也說不定,。但最大的可能就是愈演愈烈,最終地球?qū)?huì)成為一顆“死亡星球”,。到時(shí)我們就慘了,,還是現(xiàn)在好好保護(hù)吧。
7. 描寫海洋被污染的簡短優(yōu)美句
對海洋生態(tài)系統(tǒng)的破壞主要表現(xiàn)在:(
1)漁業(yè)捕撈過度和海水養(yǎng)殖管理不善,。海洋捕撈產(chǎn)量的迅速增加是機(jī)動(dòng)漁船大量增加的結(jié)果,。但是,逐年增長的捕撈力量主要集中在近海漁場,,造成近海漁業(yè)資源開發(fā)利用過度。過度的開發(fā)利用導(dǎo)致優(yōu)質(zhì)魚類資源嚴(yán)重衰退,,漁獲物中主要經(jīng)濟(jì)魚類所占比例逐年減少,,個(gè)體也趨向小型化、低齡化,,低質(zhì)小雜魚所占比例逐年增加,。
有些地區(qū)的海水養(yǎng)殖業(yè)管理不善,,出現(xiàn)了污染海洋生態(tài)環(huán)境的傾向,如養(yǎng)殖過程中產(chǎn)生的廢水造成海水有機(jī)物污染和富營養(yǎng)化,;大量采捕餌料生物,,使部分灘涂貝類大量減少,破壞了正常的食物鏈,;等等,。
(2)灘涂圍墾和填海造陸奪走了大片海洋生境。沿海灘涂大量圍墾和人工填海造陸等,,不僅使許多海洋動(dòng)物失去了大面積的棲息地,、產(chǎn)卵地、育苗場,、索餌場
8. 描寫海洋污染的作文
Pollution
Sea pollution is becoming an increasing problem for our planet and we have a responsibility to reduce sea pollution.
I need to describe the problem. Our ship currently dumps all its rubbish into the sea.It's easy to result in huge endanger. First of all, Non-organic substances such as plastic bags kill fish and whales. Because fish get trapped and whales cannot digest them. Secondly some rubbish is inherently toxic.
I can suggest some solutions. First and foremost we can create a better system of disposing of rubbish for instance. We ought to store rubbish. Next, we are supposed to make ships environmentally and friendly. A case in point is that we should stop providing plastic bags.
We must act now before it is too late!
海洋污染英語作文二:Reduce Sea Pollution
Several problems are caused by the non-organic substance. We ought not to pour wastes into the ocean, because it not only pollutes the ocean, but also lead to a series of harmful consequence. First and foremost, the non-organnic things, for instance, plastic bags, may kill fish and whales. Second, fishes can't digest them. Finally, some of the rubbish is inherently toxic, they will posion marine life.
We must take actions to protect our whale from dying. One thing we should do is creating a better system of disposing of rubbish. Another effective solution is making ships environmentally friendly. Sypermarkets shall stop the giving of plastic bags.
As a captain of the ship, you should spare no efforts to think more helpful ideas and stop dumping rubbish from now on. We all need to raise awareness of these problems. It now becomes necessary that we must act now, before it is too late!
海洋污染英語作文三:Sea pollution
Between 75 and 80% of marine pollution is caused by land, particularly agriculture. 30% of this is from the atmosphere. Around 12% of the pollution is caused by maritime transport.
In South America, 98% of domestic wastewater ends up, untreated, in the sea. The countries along the Mediterranean Sea throw 50 million tons of waste into it every year and the Chinese throw 60 million tons of waste into the Yellow sea daily. Over half of the hydrocarbon discharge comes from continents, 5% comes from oil tanker accidents, 20% comes from waste and other ship-related accidents, 4% from sea exploitation and 11 to 15% is due to natural causes. Accidental pollution through hydrocarbon is significantly decreasing and only represents a small percentage of waste through degassing estimated at between 1.5 and 3 million tons of oil a year. In 2003, according to the WWF, between 0.7 and 1.3 million tons of oil were spread by degassing in the Mediterranean. According to the Ifremer (the French Institute for Exploitation of the Sea), coastal water pollution cost the world economy almost 12.8 billion dollars in 2006.
Marine pollution is the result of products being thrown into seas and oceans, mostly by mnkind: domestic waste (sewage and rubbish, pollutants in runoff water...), industrial waste (hydrocarbons, metals, synthetic chemical and organic substances, radionuclides...) and agricultural waste (fertilisers, pesticides...).
This includes water pollution and marine sediments, and more generally all damage to marine ecosystems caused by harmful substances being discharged into the sea, either by their nature or their quantity.
海洋污染英語作文四:Sea Pollution
Marine environment is one in water, seawater tolerance hydrolyzate and suspended solids, seabed sediment and marine organisms, including complex systems. Ocean rich biological resources, mineral resources, chemical resources and power resources is an indispensable resource treasure house of human beings, with human survival and development of the relationship very close.
The main objective of the current marine conservation is to protect the living marine resources, so as not to failure, in order for human sustainable use. In particular, give priority to protect those valuable and critically endangered marine life. According to the UN for investigation, due to overfishing, accidental capture and killing of non-target to allow hunting of marine, coastal shoreline construction, mangrove deforestation, widespread marine pollution, at least the world's 25 most valuable fishery resources depleted, whales, sea turtles, manatees and many other marine animals face extinction risk. Is expected that with the expansion of the scale of ocean development,Marine living resources are likely to cause more damage.
The task of the first marine protected right to stop over-exploitation of living marine resources and secondly to protect the habitat of marine life or habitat, in particular, their migration, spawning, foraging, avoiding predators coast, tidal flats, estuaries, coral reefs, it is necessary to prevent the heavy metals, pesticides, oil, organic and easy to produce nutrients such as eutrophication of marine pollution. Preservation of the marine living resources of the natural regeneration capacity and water purification capacity, preservation of the marine ecological balance, to ensure sustainable human development and utilization of the oceans.
海洋污染英語作文五:Polluting the seas
The seas and oceans receive the brunt of human waste, whether it is by deliberate dumping or by natural run-off from the land.
In fact over 80% of all marine pollution comes from land-based activities and many pollutants are deposited in estuaries and coastal waters. Here the pollutants enter marine food chains, building up their concentrations until they reach toxic levels. It often takes human casualties to alert us to pollution and such was the case in Minimata Bay in Japan when many people died as a result of a pollutant building up in food chains. A factory was discharging waste containing methyl mercury in low concentrations into the sea and as this pollutant passed through food chains it became more concentrated in the tissues of marine organisms until it reached toxic levels.
As a consequence 649 people died from eating fish and shellfish contaminated with mercury and 3500 people suffered from mercury poisoning.
海洋污染英語作文六:Sea Pollution
From the overall situation, wastewater emissions growth speed. Is expected in 2000 will reach 666 tons. City life sewage volume will continue to increase, in 2000 reached about 783 tons. The wastewater of low (estimated at 20% ~ 30%),most of untreated wastewater directly or indirectly discharged into the water body, the serious pollution of water resources. China's seven major river systems in nearly half of serious pollution, city section of river water qualitygenerally exceed the standard 86%. The polluted water, more serious is the Huaihe, Haihe, Liaohe, Songhua River, the downstream Yangtze River and the Pearl River Delta industries in developed region.
River city section of riverpollution, heavy on the river, north to south. In 1990, 94 river city section of evaluation, 65 are subject to different degrees of pollution, accounting for 69.1%, the main pollutants ammonia nitrogen, volatile phenol and oxygen consumption of organic matter. According to the survey, 700000000 peopledrinking water the Escherichi a coli exceed the standard, 164000000 people drink organic pollution of water, 35000000 people nitrate drinking water exceed the standard.
Huaihe is one of the most polluted rivers. Huaihe in the evaluation of the 2000kilometers of the river, 78.7% river does not meet the drinking water standard,the 79.7% section does not meet the standard of fishery water, 32% do not meet the standard of irrigation water. According to statistics, the national 3000 heavily polluting enterprises, enterprises of wastewater discharge of industrial pollution,Huaihe River Basin accounts for 160. A sewage units 1.55 182 towns within the basin, industrial wastewater emissions of 1610000000 cubic meters, 700000000 cubic meters of urban living water emissions. Huaihe sewage irrigation farmland,causing serious crop production; in 1989 the occasion of the Spring Festival, the sewage discharge upstream gate opening, the tap water in Huainan, Bengbu twocity is seriously polluted and not drinking, Huaihe basin, the public drinking watercrisis, people Voices of discontent.
Huaihe basin in many areas of cancer incidence rate than the normal area than 10 times to hundreds of times, some villages in 2/3 of hepatomegaly. At the same time, due to the pollution of the estuary, anadromous fish resources has been damaged, the sharp drop in output, part of the in
9. 海邊被污染的描寫
黃昏,我覺得是一天中最美的時(shí)刻,。黃昏的海邊,,更是美的了,。
那沙灘上的貝殼,,顏色 、形狀都大不相同,。有的貝殼是扇形的,,說不定是有珍珠的呢;有的貝殼五角形,,就像天上的小星星,。夕陽照在貝殼上好像鋪上了金莎,,美極了,。
大海把浪水推到金沙灘上,,讓它休息,,別著涼。片刻,,又把浪水帶回自己身邊,不可思議,。海鷗在海上飛著,好像在說:“大海好美啊,,好美??!”當(dāng)然,,黃昏照在大海上,,所以非常的美,。一絲陽光照在海面上,。金色的海面波光粼粼,,簡直是金子掉進(jìn)了海里,。那帆船慢慢地游過,也為大海增添了風(fēng)景線,。
夕陽中的晚霞,,差不多都是金色的,,也有一些是紅的,,都有絢麗,仿佛一個(gè)彩虹世界,。
我喜歡黃昏的海邊,,它給我增添了樂趣,!