首页
登录
职称英语
Trawling (用拖网捕鱼) the seabed for fish is an environmental disaster; it wrecks
Trawling (用拖网捕鱼) the seabed for fish is an environmental disaster; it wrecks
游客
2024-01-31
32
管理
问题
Trawling (用拖网捕鱼) the seabed for fish is an environmental disaster; it wrecks ecosystems, destroys fish stocks and leaves behind a marine desert. Right? Environment campaigners say so. But there is growing evidence that the effect is sometimes very different, with trawling increasing fish stocks from the North Sea to the California coast. A new modeling study may for the first time have demonstrated why.
Trawlers attach large nets to a metal beam dragged across the seabed to catch bottom-dwelling fish. Greenpeace compares it to "driving a huge bulldozer through a forest", leaving a flat, featureless desert on the seabed. Trawling clearly does remove fish, such as large crustaceans and shellfish, says Daniel van Denderen of the Wageningen Institute for Marine Resources and Ecosystem Studies in the Netherlands. But this is a lucky break for softer, smaller species lurking in the sandy seabed, such as worms. They survive and, with fewer rivals, flourish.
And if, as is often the case, these smaller critters are the main food for fish, then the overall effect is to nurture more marine life. Imants Priede, director of Oceanlab at the University of Aberdeen, UK, says there is growing evidence that—while far from universal—the phenomenon is real. "On continental shelves such as the southern North Sea, where shifting sands and gravels are stirred up by strong tidal currents, even trawling more than once a year may be beneficial for some fish stocks," he says.
In fact, studies going back 20 years have linked persistent trawling with increased fish stocks. The cause of this counter-intuitive finding has remained uncertain. Some have suggested that trawling stirs up the seabed, throwing potential food into the water column—rather like ploughing a field. Others think that discards from fish nets add to the food available on the sea floor. But van Denderen is the first to show how trawling can stimulate fisheries simply by drifting from ecosystems. "The findings are very important," says Priede. [br] Which of the following is the best title for the passage?
选项
A、Trawling is good for fish stocks.
B、Trawling reduces fish stocks.
C、Whether trawling is beneficial for fish stocks increasing
D、Trawling needs to be advocated.
答案
C
解析
文章对trawling和fish stocks的关系进行了探讨,指出trawling虽然对海床造成破坏,捕捞了一些大型的甲壳类水生动物,但是小型的水生动物生存下来并大量繁殖,所以在一定程度上也有利于鱼类增加。但文章最后一段明确指出这种关系并不明确。所以本题答案为C。
转载请注明原文地址:https://tihaiku.com/zcyy/3408766.html
相关试题推荐
SavingNature,ButOnlyManEnvironmentalNecessitiesan
SavingNature,ButOnlyManEnvironmentalNecessitiesan
SavingNature,ButOnlyManEnvironmentalNecessitiesan
SavingNature,ButOnlyManEnvironmentalNecessitiesan
SavingNature,ButOnlyManEnvironmentalNecessitiesan
InAugust,environmentalistsinthePhilippinesvandalized(肆意破坏)afieldofG
InAugust,environmentalistsinthePhilippinesvandalized(肆意破坏)afieldofG
Overthepastdecade,theenvironmentalmovementhasexplodedontothemind
Overthepastdecade,theenvironmentalmovementhasexplodedontothemind
Overthepastdecade,theenvironmentalmovementhasexplodedontothemind
随机试题
Thedesigningofasatelliteintheheavenlyenvironmentis______aneasyjob.A、b
(1)Itismid-September,theheatisjustleakingoutoftheendofsummer,a
收文的阅办阶段有分文,(),拟办和批办四个环节A.传阅 B.催办 C.承办
对灯具的绝缘性能进行现场抽样检测,灯具的绝缘电阻值不应小于()M?,灯具内绝缘
伦敦证券交易所的主要清算周期为()。A.T+0 B.T+1 C.T+
建设项目进行线性盈亏平衡分析的前提条件是()。A:产量不变,产品售价可变 B
一般资料:求助者,男性,16岁,高中一年级学生。 案例介绍:求助者原来学习成绩
按照物料流经的区域,可以把企业生产物流分为()。A.工厂间物流和工序间物流
某跨国公司2017年进入中国市场,业务范围不断扩大,不仅在通信领域站稳了脚跟.而
下列费用中包含在国际工程投标报价其他费用中的是()。A.保函手续费 B.保
最新回复
(
0
)