earth science

Western Polynesian tropical moist forests

Western Polynesian tropical moist forests is a earth 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 Western Polynesian tropical moist forests rather than just read about it. In short: The Western Polynesian tropical moist forests is a tropical and subtropical moist broadleaf forests ecoregion in Polynesia. It includes Tuvalu, the Phoenix Islands in Kiribati, Tokelau, and Howland and Baker islands, which are possessions of the United States.

Key takeaways

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

Reference excerpt

The Western Polynesian tropical moist forests is a tropical and subtropical moist broadleaf forests ecoregion in Polynesia. It includes Tuvalu, the Phoenix Islands in Kiribati, Tokelau, and Howland and Baker islands, which are possessions of the United States.

Geography The islands are mostly atolls, low islands of coralline sand ringing a central lagoon, or raised platforms of coralline limestone. The ecoregion includes three archipelagos along with some scattered islands. Tuvalu, formerly known as the Ellice Islands, includes nine atolls between 6º to 9º S latitude and 176º to 180º E longitude. The Phoenix Islands include eight atolls between 2º to 5º S latitude and 171º to 175º W longitude. They are part of Kiribati, and mostly uninhabited. Tokelau includes three inhabited atolls, Atafu, Nukunonu, and Fakaofo, and uninhabited Swain's Island, which is disputed with American Samoa. Tokelau lies between 8º to 12º S latitude and 170º to 173º W longitude. Howland and Baker islands lie north of the Phoenix Islands.

Climate The climate of the islands is tropical, with little seasonal variation in temperature. Tuvalu and Tokelau are in the trade wind belt, and average annual rainfall ranges 150 to 350 centimetres (59 to 138 in), falling relatively consistently from month to month and year to year. Most of the Phoenix Islands and Howland and Baker islands receive less than 100 centimetres (39 in) of rain annually, with a March through June dry season. Rainfall on these islands is also more variable from year to year, with droughts during El Niño cycles.

Flora Native vegetation on the wetter islands is principally tropical moist forest, with shrub and herbaceous plant communities in rocky areas and shoreline areas exposed to salt spray. Characteristic canopy trees include Pisonia grandis up to 25 meters high, Cordia subcordata, and Heliotropium arboreum in single-species or mixed stands, with Calophyllum inophyllum, Pandanus tectorius, Hernandia nymphaeifolia, Ficus tinctoria, and Guettarda speciosa. Understory plants include the shrubs Suriana maritima and Pemphis acidula, the fern Asplenium nidus, and the vine Ipomoea violacea. Forests are interspersed with areas of Scaevola taccada and Morinda citrifolia scrub. The drier islands are covered with low plants, including sparse grassland dominated by Lepturus repens, the creepers Portulaca spp., Sida fallax, and Sesuvium portulacastrum, the grass Eragrostis paupera, and occasionally the shrubs Cordia subcordata, Abutilon indicum, Suriana maritima, Pemphis acidula, and Tribulus cistoides. The flora is mostly of widespread coastal Indo-Pacific species, with relatively few endemic species.

Fauna The native vertebrates are mostly seabirds, who roost in large numbers on many of the islands. The only forest birds are the Pacific imperial pigeon (Ducula pacifica), a year-round resident, and the migratory Pacific long-tailed cuckoo (Urodynamis taitensis), which winters in the tropical Pacific and breeds in New Zealand during the spring and summer. There are no native non-marine mammals or amphibians. Polynesian rat (Rattus exulans) and house cats have been introduced to several islands, and prey heavily on native birds. Buff-banded rails (Hypotaenidia philippensis) from Fiji have recently colonized Niulakita in Tuvalu.

Protected areas 64.3% of the ecoregion is in protected areas. Protected areas include the Phoenix Islands Protected Area.

References

External links Media related to Western Polynesian Tropical Moist Forests Ecoregion at Wikimedia Commons "Western Polynesian tropical moist forests". Terrestrial Ecoregions. World Wildlife Fund. Western Polynesian tropical moist forests (DOPA) Western Polynesian tropical moist forests (Encyclopedia of Earth)

Illustrations

Worked examples

Example 1 — a first encounter with Western Polynesian tropical moist forests

Start with the simplest possible case. Write down what Western Polynesian tropical moist forests claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth 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 Western Polynesian tropical moist forests 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 Western Polynesian tropical moist forests 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 Western Polynesian tropical moist forests

In research: Western Polynesian tropical moist forests appears in earth 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 Western Polynesian tropical moist forests 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: Western Polynesian tropical moist forests is common in secondary-school and first-year university syllabi. It links to neighbouring topics Biota of Tuvalu, Ecoregions of American Samoa, Ecoregions of Kiribati, so understanding it makes those chapters shorter.
In everyday life: Look for Western Polynesian tropical moist forests 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 Western Polynesian tropical moist forests in 20 minutes

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

Frequently asked questions

What is Western Polynesian tropical moist forests in simple terms?

Why does Western Polynesian tropical moist forests matter?

Because it connects several earth 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 Western Polynesian tropical moist forests?

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 Western Polynesian tropical moist forests.