The Accidental Rainforest IELTS Reading Answers with Explanation

Luyện tập đề IELTS Reading Practice với passage The Accidental Rainforest được lấy từ cuốn sách IELTS Practice Test Plus 2 - Test 5 - Passage 3 với trải nghiệm thi IELTS trên máy và giải thích đáp án chi tiết bằng Linearthinking, kèm list từ vựng IELTS cần học trong bài đọc.
The Accidental Rainforest IELTS Reading Answers with Explanation

📖 Bài đọc (reading passage)

The accidental rainforest
According to ecological theory, rainforests are supposed to develop slowly over millions of years. But now ecologists are being forced to reconsider their ideas
When PeterOsbeck, a Swedish priest, stopped off at the mid-Atlantic island of Ascension in 1752 on his way home from China, he wrote of ‘a heap of ruinous rocks’ with a bare, white mountain in the middle. All it boasted was a couple of dozen species of plant, most of them ferns and some of them unique to the island. And so it might have remained. But in 1843 British plant collector Joseph Hooker made a brief call on his return from Antarctica. Surveying the bare earth, he concluded that the island had suffered some natural calamity that had denuded it of vegetation and triggered a decline in rainfall that was turning the place into a desert. The British Navy, which by then maintained a garrison on the island, was keen to improve the place and asked Hooker's advice. He suggested an ambitious scheme for planting trees and shrubs that would revive rainfall and stimulate a wider ecological recovery. And, perhaps lacking anything else to do, the sailors set to with a will. In 1845, a naval transport ship from Argentina delivered a batch of seedlings. In the following years, more than 200 species of plant arrived from South Africa, from England came 700 packets of seeds, including those of two species that especially liked the place: bamboo and prickly pear. With sailors planting several thousand trees a year, the bare white mountain was soon cloaked in green and renamed Green Mountain, and by the early twentieth century the mountain's slopes were covered with a variety of trees and shrubs from all over the world. Modern ecologists throw up their hands in horror at what they see as Hookers environmental anarchy. The exotic species wrecked the indigenous ecosystem, squeezing out the islands endemic plants. In fact. Hooker knew well enough what might happen. However, he saw greater benefit in improving rainfall and encouraging more prolific vegetation on the island. But there is a much deeper issue here than the relative benefits of sparse endemic species versus luxuriant imported ones. And as botanist David Wilkinson of Liverpool John Moores University in the UK pointed out after a recent visit to the island, it goes to the heart of some of the most dearly held tenets of ecology. Conservationists' understandable concern for the fate of Ascension’s handful of unique species has, he says, blinded them to something quite astonishing the fact that the introduced species have been a roaring success. Today's Green Mountain, says Wilkinson, is ‘a fully functioning man-made tropical cloud forest' that has grown from scratch from a ragbag of species collected more or less at random from all over the planet. But how could it have happened? Conventional ecological theory says that complex ecosystems such as cloud forests can emerge only through evolutionary processes in which each organism develops in concert with others to fill particular niches. Plants eco-evolve with their pollinators and seed dispersers, while microbes in the soil evolve to deal with the leaf litter. But that’s not what happened on Green Mountain. And the experience suggests that perhaps natural rainforests are constructed far more by chance than by evolution. Species, say some ecologists, don’t so much evolve to create ecosystems as make the best of what they have. ‘The Green Mountain system is a man-made system that has produced a tropical rainforest without any co-evolution between its constituent species,’ says Wilkinson. Not everyone agrees. Alan Gray, an ecologist at the University of Edinburgh in the UK, argues that the surviving endemic species on Green Mountain, though small in number, may still form the framework of the new' ecosystem. The new arrivals may just be an adornment, with little structural importance for the ecosystem. But to Wilkinson this sounds like clutching at straws. And the idea of the instant formation of rainforests sounds increasingly plausible as research reveals that supposedly pristine tropical rainforests from the Amazon to south-east Asia may in places be little more titan the overgrown gardens of past rainforest civilizations. The most surprising thing of all is that no ecologists have thought to conduct proper research into this human-made rainforest ecosystem. A survey of the island’s flora conducted six years ago by the University of Edinburgh was concerned only with endemic species. They characterized everything else as a threat. And the Ascension authorities are currently turning Green Mountain into a national park where introduced species, at least the invasive ones, are earmarked for culling rather than conservation. Conservationists have understandable concerns, Wilkinson says. At least four endemic species have gone extinct on Ascension since the exotics started arriving. But in their urgency to protect endemics, ecologists are missing out on the study of a great enigma. ‘As you walk through the forest, you see lots of leaves that have had chunks taken out of them by various insects. There are caterpillars and beetles around.' says Wilkinson. ‘But where did they come from? Are they endemic or alien? If alien, did they come with the plant on which they feed or discover it on arrival?’ Such questions go to the heart of how- rainforests happen. The Green Mountain forest holds many secrets. And the irony is that the most artificial rainforest in the world could tell us more about rainforest ecology than any number of natural forests.

❓ Câu hỏi (questions)

Question 1 - 6
Do the following statements agree with the information given in The Reading Passage?
In following statements below, choose
TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN if it is impossible to say what the writer thinks about this
1
When Peter Osbeck visited Ascension, he found no inhabitants on the island.
2
The natural vegetation on the island contained some species which were found nowhere else.
3
Joseph Hooker assumed that human activity had caused the decline in the island's plant life.
4
British sailors on the island took part in a major tree planting project.
5
Hooker sent details of his planting scheme to a number of different countries.
6
The bamboo and prickly pear seeds sent from England were unsuitable for Ascension.
Question 7 - 11
Complete each sentences with correct ending
List of Endings
A
other rainforests may have originally been planted by man.
B
many of the island's original species were threatened with destruction.
C
the species in the original rainforest were more successful than the newer arrivals.
D
rainforests can only develop through a process of slow and complex evolution.
E
steps should be taken to prevent the destruction of the original ecosystem.
F
randomly introduced species can coexist together.
G
the introduced species may have less ecological significance than the original ones.
The reason for modern conservationists’ concern over Hooker's tree planting programme is that
7
David Wilkinson says the creation of the rainforest in Ascension is important because it shows that
8
Wilkinson says the existence of Ascension’s rainforest challenges the theory that
9
Alan Gray questions Wilkinson’s theory, claiming that
10
Additional support for Wilkinson's theory comes from findings that
11
Question 12 - 14
Choose appropriate options A, B, C or D.
12
Wilkinson suggests that conservationists' concern about the island is misguided because
A
it is based on economic rather than environmental principles.
B
it is not focusing on the most important question.
C
it is encouraging the destruction of endemic species.
D
it is not supported by the local authorities.
13
According to Wilkinson, studies of insects on the island could demonstrate
A
the possibility of new ecological relationships.
B
a future threat to the ecosystem of the island.
C
the existence of previously unknown species.
D
a chance for the survival of rainforest ecology.
14
Overall, what feature of the Ascension rainforest does the writer stress?
A
the conflict of natural and artificial systems
B
the unusual nature of its ecological structure
C
the harm done by interfering with nature
D
the speed and success of its development

🔥 Answer key (đáp án và giải thích)

1
Not Given
Rút gọn

Giải thích chi tiết



Hiểu câu hỏi: When Peter Osbeck visited Ascension, he found no inhabitants on the island.

=> Khi Peter Osbeck đến đảo Ascension, anh ấy không thấy bất kì cư dân nào

=> Ta dễ dàng tìm thấy thông tin về 'Peter Osbeck' + 'Ascension'đoạn 1, tuy nhiên cả đoạn không hề nhắc về inhabitants

=> Chọn NOT GIVEN



>>>

Vì thông tin về 'Peter Osbeck' chỉ được nhắc đến duy nhất ở đoạn 1, ta không cần phải lo rằng thông tin trên sẽ còn xuất hiện ở đoạn khác

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2
True
Mở rộng

Giải thích chi tiết



Áp dụng Linearthinking để nắm main idea:

 All it boasted was a couple of dozen species of plant , most of them ferns and some of them unique to the island.

=> Unique to the island = đặc trưng đối với hòn đảo -> Chỉ hòn đảo này mới có các loại cây này

=> Chọn TRUE



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3
False
Mở rộng

Giải thích chi tiết



Dựa vào tên riêng 'Joseph Hooker', ta có thể nhanh chóng xác định được thông tin cần đọc



Áp dụng Linearthinking để nắm main idea:

 he concluded that the island had suffered some natural calamity that had denuded it of vegetation and triggered a decline in rainfall that was turning the place into a desert.

=> Vậy 'natural calamity' là thứ khiến cho vegetation bị denuded - và - gây ra sự sụt giảm lượng mưa, khiến hòn đảo trở thành sa mạc

>>> Cho dù không hiểu 'natural calamity' là gì, ta vẫn biết nó là cái gì đó liên quan đến tự nhiên, và nó tác động tới vegetation của hòn đảo

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4
True
Mở rộng

Giải thích chi tiết



Ta áp dụng đọc connection với Linearthinking để nắm main idea:

 1 He suggested an ambitious scheme for planting trees and shrubs

 2 perhaps lacking anything else to do , the sailors set to with a will.

=> Ta có cụm 'set to' nghĩa là 'start working or dealing with something'

=> 'Sailors' là những người tham gia vào 'scheme for planting trees'

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5
Not Given
Mở rộng

Giải thích chi tiết



Vẫn xoay quanh 'planting scheme' như câu trước nên ta có thể dễ dàng xác định được thông tin

Hiểu câu hỏi: Hooker sent details of his planting scheme to a number of different countries

=> Hookers gửi chi tiết kế hoạch trồng cây cho các nước khác nhau

=> Điều này không được đề cập tới trong bài đọc

=> Chọn NOT GIVEN



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6
False
Mở rộng

Giải thích chi tiết



Thông tin 'bambooo' + 'prickly pear' + 'England' cho phép ta dễ dàng xác định thông tin cần đọc



Áp dụng Linearthinking để nắm main idea:

 from England came 700 packets of seeds ,  including those of two species that especially liked the place : bamboo and prickly pear

=> Hạt gióng của 'bamboo and prickly pear' - đặc biệt thích the place (hòn đảo)

=> Nói cách khác, hòn đảo Ascension là nơi thích hợp để các loại cây này phát triển

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7
B
Mở rộng

Giải thích chi tiết



Dựa vào thông tin 'modern conservationists', ta có thể tìm thấy thông tin 'modern ecologists'



Thông tin nằm ở 2 câu nên ta đọc connection với Linearthinking để nắm main idea:

 1 Modern ecologists throw up their hands in horror at what they see as Hookers environmental anarchy. 

 2 The exotic species wrecked the indigenous ecosystem , squeezing out the islands endemic plants.

>>> 'throw up your hands in horror' là một cụm, được dùng để diễn tả sự ngạc nhiên, không đồng tình với điều gì đó

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8
F
Mở rộng

Giải thích chi tiết



Dựa vào tên riêng 'David Wilkinson' ta nhanh chóng tìm được thông tin cần đọc



Vì thông tin nằm ở 2 câu, ta đọc simplify + connection với Linearthinking nhé

 1 as botanist David Wilkinson pointed out , it goes to the heart of some of the most dearly held tenets of ecology. 

 2 Conservationists' understandable concern for the fate of Ascension’s handful of unique species has blinded them to the fact that the introduced species have been a roaring success.

=> Nếu bạn thấy cụm 'goes to the heart of some of the most dearly held tenets of ecology' khó hiểu, ta đọc câu 2 là được

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9
D
Mở rộng

Giải thích chi tiết



Sau khi nhắc về 'Green Mountain, a tropical forest', bài đọc đề cập tới 'conventional theory'

=> Biết đang nói về mối liên hệ giữa 'the existence of Ascension’s rainforest' + 'the theory'

=> Xác định được thông tin



Áp dụng Linearthinking để nắm main idea:

 1 Today's Green Mountain , says Wilkinson , is ‘a fully functioning man-made tropical cloud forest' that has grown from scratch from a ragbag of species collected more or less at random from all over the planet.

Xem full giải thích
10
G
Mở rộng

Giải thích chi tiết



Áp dụng Linearthinking để nắm main idea:

 1 Alan Gray argues that the surviving endemic species on Green Mountain , though small in number , may still form the framework of the new' ecosystem.

 2 The new arrivals may just be an adornment , with little structural importance for the ecosystem.

=> 1 + 2 : Dù có số lượng ít - các loài endemic species (loài bản địa) - vẫn hình thành nền tảng cho hệ sinh thái - còn - new arrivals - thì ít quan trọng hơn đối với hệ sinh thái

=> Ít quan trọng hơn với hệ sinh thái -> Have less ecological significance -> Answer: G



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11
A
Mở rộng

Giải thích chi tiết



'instant formation of rainforests' là theory của Wilkinson - và nó trở nên increasingly plausible (hợp lý)' -> Biết đang ủng hộ theory

=> Xác định được thông tin



Áp dụng Linearthinking để nắm main idea:

 ...as research reveals that supposedly pristine tropical rainforests from the Amazon to south-east Asia may in places be little more titan the overgrown gardens of past rainforest civilizations.

=> Research phát hiện rằng - những khu rừng tưởng chừng như hoang sơ - trước đây có thể là những 'overgrown gardens' - của cư dân ngày xưa

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12
B
Mở rộng

Giải thích chi tiết



Ở đầu đoạn 3 từ dưới đếm lên, bài đọc có nói conservationists' understandable concern is - sau đó có từ nối 'But..'

=> Có thể hiểu được - nhưng ... -> Biết chuẩn bị nói về một mặt hạn chế của concern đó -> Ứng với 'misguided'

=> Xác định được thông tin





Áp dụng Linearthinking để nắm main idea:

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13
A
Mở rộng

Giải thích chi tiết



Thông tin nằm ở nhiều câu nên ta áp dụng đọc connection với Linearthinking nhé

 1 There are caterpillars and beetles around .' says Wilkinson.

 2 ‘But where did they come from? 

 3 Are they endemic or alien?

 4 If alien , did they come with the plant on which they feed or discover it on arrival?’

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14
D
Mở rộng

Giải thích chi tiết



Ta thấy tất cả các đáp án đều được nhắc đến trong bài, ta chỉ cần chọn ra đáp án được nhấn mạnh nhất



Đọc sub-heading ta sẽ thấy:

 Rainforests are supposed to develop slowly over millions of years . But now ecologists are being forced to reconsider their ideas

=> Rainforests - đáng lẽ ra phải mất hàng triệu năm để phát triển - nhưng bây giờ - ecologists phải suy cân nhắc lại về chuyện này

=> Sub-heading đặt vấn đề về tốc độ (speed) phát triển của rainforests

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