翻訳と辞書 Words near each other ・ Coral reef fish ・ Coral Reef Initiative for the South Pacific ・ Coral reef organizations ・ Coral reef protection ・ Coral Reef Restaurant ・ Coral Reef Senior High School ・ Coral Reefer Band ・ Coral Reefs (film) ・ Coral reefs in India ・ Coral Ridge ・ Coral Ridge Baptist University ・ Coral Ridge Mall ・ Coral Ridge Presbyterian Church ・ Coral Rock ・ Coral Ross ・ Coral sand ・ Coral Sea ・ Coral Sea (disambiguation) ・ Coral Sea Ferry ・ Coral Sea Glacier ・ Coral Sea gregory ・ Coral Sea Islands ・ Coral Sea Reserves Ramsar Site ・ Coral Sea stingaree ・ Coral Secondary School ・ Coral Seymour Ballpark ・ Coral Short ・ Coral Smith ・ Coral snake ・ Coral Springs Center for the Arts Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Coral sand ： ウィキペディア英語版 Coral sand Coral sand is sand of particles originating in tropical and sub-tropical marine environments from bioerosion of limestone skeletal material of marine organisms. One example of this process is that of parrot fishes which bite off pieces of coral, digest the living tissue, and excrete the inorganic component as silt and sand. However, the term "coral" in ''coral sand'' is used loosely in this sense to mean limestone of recent biological origin; corals are not the dominant contributors of sand particles to most such deposits. Rather, remnant skeletal fragments of foraminifera, calcareous algae, molluscs, and crustaceans can predominate. Because it is composed of limestone, coral sand is acid-soluble. ==Environmental issues== Coral sand mining is a significant industry in some areas, and can have damaging environmental effects. Over 500,000 tons of coral sand are mined annually from Mauritius. Many Comoros beaches have been scarred by sand mining. Over 250 tons of shells and corals were exported from Tanzania in 1974. Exploitive collection has moved from the depleted areas off Tanzania and Kenya to the islands of Zanzibar and Mafia. Such extensive mining can be very harmful to reef ecosystems and beaches. In an effort to prevent damage from reef sand mining, the Convention on international trade in endangered species urged parties to the convention to work for the conservation and sustainable use of the coral reef ecosystems. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Coral sand」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.