首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Often conjuring images of dank, smelly, mosquito-infested wastelands, upon closer look, wetlands are actually biologically diver
Often conjuring images of dank, smelly, mosquito-infested wastelands, upon closer look, wetlands are actually biologically diver
admin
2022-06-07
31
问题
Often conjuring images of dank, smelly, mosquito-infested wastelands, upon closer look, wetlands are actually biologically diverse and productive ecosystems. Home to a variety of plant life, including floating pond lilies, cattails, cypress, tamarack, and blue spruce, wetlands support diverse communities of invertebrates, which in turn support a wide variety of birds and other vertebrates. Primary consumers from crustaceans, mollusks, and aquatic insect larvae to muskrats, geese, and deer rely on the abundance of algae, plants, and detritus for food. Wetlands also support a variety of carnivores, including dragonflies, otters, alligators, and osprey. Thus, wetlands of the world maintain biologically diverse communities of ecological and economic value.
Many ecologically and economically important species call wetlands home for at least part of their lives. For instance, commercially important fish and shellfish, including shrimp, blue crab, oysters, salmon, trout, and seatrout rely on, or are associated with, wetlands. Wetlands are also critical habitat for migratory birds and waterfowl, including ducks, egrets, and geese. In fact, more than one-third of the species listed as threatened or endangered in the United States live solely in wetlands and nearly half use wetlands at some point in their lives. As such, many wetlands are often recognized as important conservation or restoration targets.
While covering only six percent of the Earth’s surface, wetlands provide a disproportionately high number of ecosystem services, in addition to maintaining biodiversity. For instance, wetlands also mitigate floods, protect coastal areas from storms, improve water quality, recharge groundwater aquifers, serve as sinks, sources, or transformers of materials, and produce food and goods for human use. When evaluating the economic value of these various functions, scientists concluded that the economic value provided by wetland ecosystems exceeded that provided by lakes, streams, forests, and grasslands and was second only to that provided by coastal estuaries.
With mitigation, wetlands are created, restored, or enhanced to replace wetland loss due to development The Ramsar Convention, an international treaty aimed at conserving wetlands, requires member countries to develop national wetland policies, to establish wetland reserves, and to designate one or more wetlands as an area of international importance. All these efforts are designed to protect or conserve wetlands and the ecosystem services they provide.
In coastal wetlands, tidal influence drives the movement and distribution of water and can range from permanent flooding in subtidal wetlands to less frequent flooding in others, with changes in water level occurring daily or semi-daily. Inland wetlands, which lack daily tidal influences, can also be permanently flooded on one extreme or intermittently flooded on the other extreme, with fluctuations over time often occurring seasonally. It is the balance of water inflows and outflows, or the water budget, as well as the geomorphology and soils that determine the timing, duration, and patterns of flooding in a wetland.
A dragonfly is a carnivore because its menu includes________.
选项
A、insects
B、cattails
C、muskrats
D、seatrouts
答案
A
解析
本题问蜻蜓的食物是什么。根据常识可知蜻蜓以昆虫为食,故选A项。本题也可通过排除法解题,后三项分别是B项香蒲、C项麝鼠和D项河鳟,显然都不是蜻蜓的食物,故排除。
转载请注明原文地址:https://kaotiyun.com/show/I4MO777K
本试题收录于:
CATTI二级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI二级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
HackersAttackUSStateDepartmentComputersTheU.S.StateDepartmenthascloseditspublicemailsystemandwebsitesafter
WherecanthemangetafreewirelessInternetconnection?
RichDiseasesinPoorCountriesNon-communicablediseasesusedtobearich-worldproblem.Atthattime,peopleinpoorcount
Listentothefollowingpassage.WriteinEnglishashortsummaryofaround150wordsofwhatyouhaveheardontheANSWERSHEET
Peoplearoundtheworldarebitterlydividedaboutwhichanimalisthebetterpet,adogoracat.Butanewstudymayhavefoun
Thelongserviceofdecadesoftheto-be-retiredwiththecompanywas______apresenteachfromthePresident.
AfederaljudgeonMondaycertifieda$200billionclassactionlawsuitagainstthetobaccoindustryforitsmarketingoflight
Althoughmostofusthinkofthebrainasasingleframework,itisactuallydividedintotwohalves.
Thelongserviceofdecadesoftheto-be-retiredwiththecompanywas______apresenteachfromthePresident.
Hewasonlya(n)______rulerofthecountry;therealonewashismother,whoactuallyhandledstateaffairsandpossessedthepo
随机试题
患儿,男,5岁。进食时不慎跌倒,筷子戳破腭部2小时。急诊检查见软腭有一约15mm长创口,为贯穿伤。患儿清醒,检查合作。如同时存在硬腭组织缺损,创口较大,此时的局部处理为
A、一类医疗器械B、二类医疗器械C、三类医疗器械D、试产品E、难产品由省、自治区、直辖市人民政府药品监督管理部门批准并发给产品注册证书的是
()结构的特点主要表现在止水性好,构造简单,型钢插入深度一般小于搅拌桩深度,施工速度快,型钢可以部分回收、重复利用。
古人称早采茶为茗,晚采为茶,嫩芽叫“雀舌麦颗”。()
高中班主任应帮助学生形成的积极的教育观念是()。
用图式、同化、顺应、平衡这些概念来说明儿童认知发展规律的心理学家是()。
长方形操场四周栽了一些松树,每两棵松树相隔5米,操场四个角上各有一棵松树,小明和小丽从一个角上同时出发,向不同的方向走去,小明的速度是小丽的2倍,结果小丽在拐了一个弯后遇到的第5棵树遇见了小明。已知操场的长是宽的两倍,则操场周长多少米?
一个债券标明利率为10%,问哪种复利计息方式能带来最大的实际利率?()(清华大学2018年真题)
将展开为x的幂级数.
防止地址越界的工作是由下列哪一项完成的?______。
最新回复
(
0
)