biology

Pinus sibirica

Pinus sibirica is a biology 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 Pinus sibirica rather than just read about it. In short: Pinus sibirica, or Siberian pine, in the family Pinaceae is a species of pine tree that occurs in Siberia from 58°E in the Ural Mountains east to 126°E in the Stanovoy Range in southern Sakha Republic, and from Igarka at 68°N in the lower Yenisei valley, south to 45°N in central Mongolia. Description Pinus sibirica is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the l…

Key takeaways

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

Reference excerpt

Pinus sibirica, or Siberian pine, in the family Pinaceae is a species of pine tree that occurs in Siberia from 58°E in the Ural Mountains east to 126°E in the Stanovoy Range in southern Sakha Republic, and from Igarka at 68°N in the lower Yenisei valley, south to 45°N in central Mongolia.

Description Pinus sibirica is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. They are 5–10 cm long. Siberian pine cones are 5–9 cm long. The 9–12 mm long seeds have only a vestigial wing and are dispersed by spotted nutcrackers. Siberian pine is treated as a variety or subspecies of the very similar Swiss pine (Pinus cembra) by some botanists. It differs in having slightly larger cones, and needles with three resin canals instead of two in Swiss pine. Like other European and Asian white pines, Siberian pine is very resistant to white pine blister rust (Cronartium ribicola). This fungal disease was accidentally introduced from Europe into North America, where it has caused severe mortality in the American native white pines in many areas, notably the closely related whitebark pine. Siberian pine is of great value for research into hybridisation and genetic modification to develop rust resistance in these species.

Distribution In the north of its range, it grows at low altitudes, typically 100–200 m, whereas further south, it is a mountain tree, growing at 1,000-2,400 m altitude. It often reaches the alpine tree line in this area. The mature size is up to 30–40 m height, and 1.5 m trunk diameter. Its maximum lifetime is 800–850 years.

Cultivation

Siberian pine, Pinus sibirica, is a popular ornamental tree in parks and large gardens where the climate is cold, such as central Canada, giving steady though not fast growth on a wide range of sites. It is very tolerant of severe winter cold, hardy down to at least –60 °C, and also of wind exposure. The seeds are also harvested and sold as pine nuts, which in Russia are marketed as Cedar nuts (Russian: Кедровые орехи).

"Siberian cedar" The Russian name Сибирский кедр (tr. Sibirsky kedr) is usually translated in English as "Siberian cedar." References to "cedar" or "dwarf cedar" in texts translated from Russian usually refer to this tree or related pines, not to true cedars.

Chemistry Pinostilbene is a stilbenoid found, along with resveratrol, in the bark of P. sibirica.

See also Siberia portal Pinus pumila × P. sibirica

References

External links Pinetum.org: Pinus sibirica cone picture - (scroll to bottom of page) Media related to Pinus sibirica at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Pinus sibirica

Start with the simplest possible case. Write down what Pinus sibirica claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Pinus sibirica 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 Pinus sibirica 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 Pinus sibirica

In research: Pinus sibirica appears in biology 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 Pinus sibirica 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: Pinus sibirica is common in secondary-school and first-year university syllabi. It links to neighbouring topics Edible nuts and seeds, Flora of Mongolia, Flora of Northeast Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Pinus sibirica 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 Pinus sibirica in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pinus sibirica 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 Pinus sibirica out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pinus sibirica in simple terms?

Why does Pinus sibirica matter?

Because it connects several biology 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 Pinus sibirica?

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 Pinus sibirica.