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短篇科普小品：第二十六篇
本文为原创纪实科普文稿
沿用《国家地理》严谨写实文风，内容独立撰写、无抄袭。
英文原文
The crisis of coral reefs stands as
one of the most urgent ecological emergencies
facing our blue planet.
Often called the rainforests of the sea,
coral reefs occupy less than one percent
of the total ocean floor,
yet sustain nearly a quarter of all marine species.
These vibrant underwater cities
are built by tiny coral polyps,
minuscule soft-bodied creatures
that secrete calcium carbonate
to construct the hard rocky frameworks of reefs.
Within the coral tissue live symbiotic algae
known as zooxanthellae.
These microscopic partners supply corals
with energy from photosynthesis,
and lend reefs their dazzling spectrum of colours.
This delicate partnership can only survive
within narrow ranges of water temperature,
salinity and water clarity.
For thousands of years,
coral reefs have served as vital foundations
for coastal marine ecosystems.
They offer shelter, breeding grounds and hunting space
for fish, crustaceans, mollusks and sea turtles.
Reefs also act as natural sea walls,
absorbing the power of incoming waves,
reducing coastal erosion and shielding shoreline communities
from storm surges and tsunamis.
Millions of coastal people around the globe
rely on healthy reefs for protein-rich seafood,
fishery income and sustainable tourism revenue.
Today, this ancient marine ecosystem
is under unprecedented assault.
The primary threat is ocean warming driven by climate change.
When seawater grows too hot,
corals expel their symbiotic algae.
Without these colourful energy providers,
the white coral skeleton is exposed,
a devastating phenomenon known as coral bleaching.
If high temperatures persist for too long,
the corals cannot recover and die.
Mass bleaching events have swept across
the Great Barrier Reef and countless tropical reef systems
over the past decades.
Ocean acidification compounds the harm.
As the sea absorbs excess carbon dioxide
from human emissions,
water chemistry shifts,
lowering the concentration of carbonate ions.
This makes it far harder for coral polyps
to build and repair their calcium skeletons,
slowing reef growth and weakening their structures.
Local human pressures worsen the crisis further.
Runoff from farmland carries fertilisers and sediment
into coastal waters.
Nutrient pollution triggers explosive algae blooms,
which smother corals and block sunlight.
Dynamite fishing, cyanide fishing and overharvesting
of reef species directly shatter reef frameworks
and disrupt the food balance.
Unregulated coastal development,
wastewater discharge and careless tourism
add extra damage to fragile shallow reef habitats.
The loss of coral reefs triggers cascading consequences.
Fish populations decline as shelter and food disappear.
Coastlines lose their natural wave defence,
raising risks of flooding and land loss.
Fishermen lose their livelihoods,
and the rich biological heritage of the ocean fades away.
Scientists and conservationists are racing
to protect and restore these vanishing reefs.
Marine protected areas are established
to restrict destructive fishing practices
and give reefs a chance to recover.
Researchers breed heat-tolerant coral strains
in underwater nurseries,
transplanting resilient fragments back onto damaged reefs.
Communities reduce polluted runoff,
regulate coastal construction
and educate visitors about low-impact reef tourism.
Global cuts to greenhouse gas emissions
remain the most essential long-term solution.
Coral reefs are silent witnesses
to the changing health of planet Earth.
Their slow growth spans centuries,
yet they can collapse within just a few years.
The crisis of coral reefs is not merely
a marine environmental problem.
It is a warning signal from the ocean,
revealing how deeply human activity
is reshaping the world’s biosphere.
To save these underwater gardens,
human society must act quickly,
balancing development needs
with the preservation of irreplaceable marine life.
译文
珊瑚礁危机，
是蓝色星球当下最紧迫的生态灾难之一。
珊瑚礁素有“海洋热带雨林”之称，
虽然占地不足海底总面积的百分之一，
却供养着将近四分之一的海洋物种。
这些生机盎然的水下城邦，
由微小的珊瑚虫构筑而成。
这种软体微小动物分泌碳酸钙，
搭建起礁石坚硬的骨架。
珊瑚组织内部共生着虫黄藻。
这些微小共生伙伴依靠光合作用
为珊瑚供给能量，
也赋予珊瑚礁缤纷绚烂的色彩。
这套脆弱的共生关系，
只能在有限的水温、盐度与水体透明度范围内维持。
数千年来，珊瑚礁一直是
近海海洋生态系统至关重要的基石。
它为鱼类、甲壳类、软体动物与海龟
提供庇护、繁殖场所与觅食空间。
同时珊瑚礁也是天然防波堤，
削弱海浪冲击力，减轻海岸侵蚀，
保护沿岸居民，降低风暴潮与海啸带来的威胁。
全球数百万沿海居民，
依靠健康珊瑚礁获取高蛋白海产品、渔业收入，
以及可持续旅游收益。
如今，这套古老海洋生态系统
正遭受前所未有的冲击。
首要威胁来自气候变化引发的海水升温。
当海水温度过高，珊瑚便会排出体内共生藻。
失去这些提供能量的彩色共生生物，
珊瑚白色骨骼裸露出来，
这便是极具破坏力的珊瑚白化现象。
倘若高温持续太久，
珊瑚无法恢复，最终走向死亡。
过去数十年，大规模白化事件
接连席卷大堡礁以及无数热带珊瑚礁群。
海洋酸化加剧了伤害。
海洋吸收人类排放的过量二氧化碳，
水体化学性质发生改变，
碳酸根离子浓度下降。
珊瑚虫因此更难构建、修复碳酸钙骨骼，
礁石生长放缓，结构变得脆弱。
来自本地人类活动的压力，进一步加重危机。
农田径流携带化肥与泥沙汇入近海。
营养污染引发藻类暴发性繁殖，
藻类覆盖珊瑚，遮挡阳光。
炸鱼、毒鱼以及过度捕捞礁栖生物，
直接击碎礁石结构，破坏食物链平衡。
无序海岸开发、污水排放、粗放旅游活动，
持续损害浅海脆弱的珊瑚栖息地。
珊瑚礁消亡会引发连锁恶果。
随着庇护场所与食物消失，鱼类种群衰减。
海岸线失去天然防波屏障，
洪水与土地流失风险上升。
渔民失去赖以生存的资源，
海洋丰富的生物遗产逐步消逝。
科学家与保护工作者正全力抢救、修复这些正在消失的礁体。
海洋保护区陆续设立，
限制破坏性捕捞，给珊瑚礁留出休养空间。
科研人员在水下苗圃培育耐热珊瑚品系，
将耐受性更强的珊瑚断枝移植回受损礁区。
沿岸社区减少污染径流，管控海岸工程，
向游客普及低影响的珊瑚观光理念。
而从长远来看，削减温室气体排放，才是最根本的解决方案。
珊瑚礁静静见证着地球健康状态的变迁。
它们历经数百年缓慢生长，
却可能短短数年之内彻底崩溃。
珊瑚礁危机，不只是单纯的海洋环境问题。
它是来自海洋的警示信号，
揭示人类活动正在深刻改变地球生物圈。
想要守护这片水下花园，
人类社会必须迅速行动，
在发展需求和保护不可替代海洋生命之间找到平衡。
一、核心生词
1. polyp
/ˈpɒlɪp/
珊瑚虫
名词（n.）
2. symbiotic
/ˌsɪmbaɪˈɒtɪk/
共生的
形容词（adj.）
3. zooxanthellae
/ˌzuːəzænˈθeliː/
虫黄藻
名词（n.）
4. calcium carbonate
/ˈkælsiəm ˈkɑːbəneɪt/
碳酸钙
名词（n.）
5. bleaching
/ˈbliːtʃɪŋ/
白化
名词（n.）
6. acidification
/əˌsɪdɪfɪˈkeɪʃn/
酸化
名词（n.）
7. sediment
/ˈsedɪmənt/
沉积物，泥沙
名词（n.）
8. crustacean
/krʌˈsteɪʃn/
甲壳动物
名词（n.）
9. nursery
/ˈnɜːsəri/
苗圃；培育场
名词（n.）
10. greenhouse gas
/ˈɡriːnhaʊs ɡæs/
温室气体
名词（n.）
11. ecosystem
/ˈiːkəʊsɪstəm/
生态系统
名词（n.）
12. irreplaceable
/ˌɪrɪˈpleɪsəbl/
不可替代的
形容词（adj.）
二、重点短语
1. rainforests of the sea
海洋热带雨林
2. coral reef
珊瑚礁
3. coral bleaching
珊瑚白化
4. ocean acidification
海洋酸化
5. coastal erosion
海岸侵蚀
6. storm surge
风暴潮
7. algae bloom
藻类爆发
8. marine protected area
海洋保护区
9. greenhouse gas emissions
温室气体排放
10. biosphere
生物圈
三、长难句拆解
句子
The crisis of coral reefs stands as
one of the most urgent ecological emergencies
facing our blue planet.
主干：
The crisis of coral reefs stands as
one of the most urgent ecological emergencies facing our blue planet
主干译文：
珊瑚礁危机，是蓝色星球当下最紧迫的生态灾难之一。
句子
Often called the rainforests of the sea,
coral reefs occupy less than one percent
of the total ocean floor,
yet sustain nearly a quarter of all marine species.
主干：
coral reefs occupy less than one percent of the total ocean floor
并列句：
yet sustain nearly a quarter of all marine species
状语：
Often called the rainforests of the sea
译文：
珊瑚礁素有“海洋热带雨林”之称，虽然占地不足海底总面积的百分之一，
却供养着将近四分之一的海洋物种。
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