science

Stone wall trees in Hong Kong

Stone wall trees in Hong Kong is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Stone wall trees in Hong Kong rather than just read about it. In short: Masonry wall trees refer to trees grown from openings in masonry stone retaining walls. In alleviating hazards from landslides, many slopes adjacent to main roads and developments on Hong Kong Island in Hong Kong needed to be secured.

Key takeaways

Stone wall trees in Hong Kong belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Stone wall trees in Hong Kong to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Stone wall trees in Hong Kong from memory before moving on to harder problems.

Reference excerpt

Masonry wall trees refer to trees grown from openings in masonry stone retaining walls. In alleviating hazards from landslides, many slopes adjacent to main roads and developments on Hong Kong Island in Hong Kong needed to be secured. Between the 19th century and World War II, the Hong Kong Government and other contractors constructed masonry stone walls to prevent these hazards. Not until the last two decades have slopes been stabilised through cementing. In early constructed walls, opened joints between stones allowed strong species like banyans to sprout. Traffic and human activities carry on despite the growth of these plants, which further stabilise the retaining walls they are growing on. As time goes by, sprouts mature into fully developed stone wall trees.

Distribution As of today, 1275 stone wall trees are situated on 504 masonry stone retaining walls, with 110 walls in the Central and Western District, where most walls remain, with many others in Wan Chai District. A majority of these trees have lived for over a century. According to the Conservancy Association, some notable trees are located at:

Hong Kong Island The largest tree is an over-a-century-old Chinese banyan (Ficus microcarpa), located in Forbes Street, near Forbes Street Playground. Another tree on Bonham Road near Centre Street had a height of around 20 metres, and was the tallest in the city, however it fell on 22 July 2015 in a storm.

Central and Western District

Kennedy Town Forbes Street

Mid-Levels Hollywood Road (Former police quarters) Bonham Road near Centre Street (All trees are now removed by the government in view of Typhoon Soudelor, which actually didn't have any impact to Hong Kong according to its route) Rose Lane Intersection of Bonham Road and High Street Hospital Road near Bonham Road Opposite of 84 Robinson Road St. Stephen's Lane King George V Memorial Park

Wan Chai District Stubbs Road near Kennedy Road Ship Street (near Nam Koo Terrace)

Kowloon

Yau Tsim Mong District Adjacent to aviary pond in Kowloon Park

Sham Shui Po District Lung Chu Street Nullah In Lung Chu Street Nullah, there are about 20 wall trees. More than 12 wall trees exist at the site and most of them are Chinese banyan and common red-stem fig. All of them are mature trees with a height between 3 and 11 metres high. The special one is those common red-stem fig. It is a unique phenomenon for those particular wall trees since the majority of wall trees in Hong Kong are Chinese banyan. It is the only site in Hong Kong, which have a dozen common red-stem fig trees in one location, which its buttress root adapted to the condition of the masonry walls. The nullah, therefore, is a scene with special scientific value for further study. Comparing the trees planted in the park next to the nullah, the trees in the nullah are rich in biodiversity. Various kinds of birds could be found on those trees along the nullah, for example, yellow wagtail and white wagtail etc. Besides, the trees around nullah formed a green canopy and functioned as a green lung for the community. For all those years, the trees benefited the community, for example, by minimizing the heat island effect. Lai Chi Kok Hospital HACare Home There is also a Chinese banyan growing on the masonry wall next to Lai Chi Kok hospital, HACare Home.

Ecological value In the beginning, greenery of the site was not taken into consideration during road constructions. Roads built at that time were often narrow and had no space for adding canopy by simply planting trees. Trees naturally emerged from the walls taking up no additional space at ground level, and shield the pathways from heat during the summer. Tall wall trees, especially banyans, also improve air quality by filtering particulates and blocking heat emitted from automobiles and building-wide air conditioning systems, that would otherwise be trapped between skyscrapers, generating air pollution. Biodiversity is maintained through these trees by providing habitats for birds and various insects. The integrity of the retaining wall may be enhanced or compromised, depending on the size of the tree that develops, the disposition of its roots and to what extent the roots have been able to penetrate through the wall.

Cultural value Stone wall trees in Hong Kong have become a part of the landscape in communities, as most of them have existed since before World War II. The artistic shapes and endurance of these trees won appreciation from nearby residents, which transform into an indispensable part of the collective memories of the community. Some senior residents believe that the trees can improve Feng Shui and bring positive prospects towards the neighbourhood. Wall trees also create a beneficial environment that enables higher property prices around the trees compared to other premises in the area.

Additional conservations Ding Tomb among the Ming Dynasty Tombs, Beijing Ming Dynasty walls in Yuexiu Park, Guangzhou

Illustrations

Worked examples

Example 1 — a first encounter with Stone wall trees in Hong Kong

Start with the simplest possible case. Write down what Stone wall trees in Hong Kong claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Stone wall trees in Hong Kong before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Stone wall trees in Hong Kong ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Stone wall trees in Hong Kong

In research: Stone wall trees in Hong Kong appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Stone wall trees in Hong Kong in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Stone wall trees in Hong Kong is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Hong Kong, Natural history of Hong Kong, Nature conservation in Hong Kong, so understanding it makes those chapters shorter.
In everyday life: Look for Stone wall trees in Hong Kong outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Stone wall trees in Hong Kong in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Stone wall trees in Hong Kong means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Stone wall trees in Hong Kong out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Stone wall trees in Hong Kong in simple terms?

Why does Stone wall trees in Hong Kong matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Stone wall trees in Hong Kong?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Stone wall trees in Hong Kong.