An international team of scientists has discovered a huge coral reef in the Amazon River. The team from the universities of Georgia in the USA and Rio de Janeiro in Brazil was on an expedition to learn more about Amazon River plumes when it made the discovery. Plumes are the areas close to where a river meets the sea and the river's freshwater mixes with the saltwater of the ocean. The reef system spans an area of 5,800 square kilometres, stretching from the coast of French Guiana to the rainforest of the Brazilian state of Maranhao. The finding has surprised marine biologists because reefs are rarely found in large rivers as the water is usually too muddy and dark, and does not contain enough salt.
The scientists only explored 10 per cent of the reef. They said there were many sponges, creatures and other marine life that had adapted to life in the darker waters. They also recorded 73 species of reef fish, many of them carnivorous. Researcher Dr. Patricia Yager enthused about what she had seen. She said: "We brought up the most amazing and colorful animals I have ever seen on an expedition." Sadly, not all news about the reef is good. The whole area has been earmarked for oil exploration. Dr Yager warned that: "From ocean acidification and ocean warming to plans for offshore oil exploration right on top of these new discoveries, the whole system is at risk from human impacts."
国际科学团队在亚马逊河发现巨大珊瑚礁。为更好了解亚马逊羽流，美国乔治亚大学和里约科学家前往探寻，并意外发现珊瑚礁 。羽流区域靠近淡水与海水聚合的河海交汇处 。珊瑚礁绵延5800公里，从法属圭亚那延伸至巴西马拉尼昂州 。由于亚马逊水质浑浊，且日照不足，盐分不够，这片淡水水域应该是不适宜珊瑚生长，此发现震惊了海洋生物学家 。
科学家只探寻了珊瑚的10%。称海绵等海洋生物已适应了“昏暗”环境 。他们还记录了73种珊瑚鱼，其中许多为食肉生物 。研究学家帕特丽夏·耶格尔博士侃侃而谈起来 。她称：“在以往探寻中，我们从未发现过如此奇幻的生物 。但这一消息喜忧参半 。整片区域已确定进行石油勘探 。耶格尔博士警告称：“从海洋酸化到海温升高，再到对珊瑚礁上方进行近海石油勘探，整个生态系统已遭到人类活动威胁 。”
1.at risk 有危险
例句：The crisis could well place the relationship at risk.
2.close to 在附近
例句：We were close to when it happened.
3.coral reef 珊瑚礁
例句：An unspoiled coral reef encloses the bay.
4.marine life 海洋生物
例句：Water pollution imperils all kinds of marine life.
1.What kind of team discovered the reef?
a) a swimming team
b) an international one
c) a big team
d) a soccer team
2.What did the team originally set out to study?
3.How large is the reef?
a) 558,000 sq kms
b) 580 sq kms
c) 5,800 sq kms
d) 55,800 sq kms
4.In which country does the river meet the sea?
a) French Guiana
b) British Guyana
5.What is there usually not enough of in rivers for reefs to develop?
6.How much of the reef has the team explored?
7.How many different species of reef fish did the scientists find?
8.What did the article say about the eating habits of some reef fish?
a) they are carnivorous
b) they are hungry
c) they are herbivorous
d) they are messy
9.What has the area been earmarked for?
b) a surfing competition
c) a marine park
d) oil exploration
10.What did the article say the area system was at risk from?
c) human impacts