biology

Merriam's elk

Merriam's elk 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 Merriam's elk rather than just read about it. In short: The Merriam's elk (Cervus canadensis merriami) is an extinct subspecies or population of elk once found in the arid lands of the southwestern United States (in Arizona, New Mexico and Texas), as well as in Mexico. The taxonomic validity of this subspecies is disputed.

Key takeaways

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

Reference excerpt

The Merriam's elk (Cervus canadensis merriami) is an extinct subspecies or population of elk once found in the arid lands of the southwestern United States (in Arizona, New Mexico and Texas), as well as in Mexico. The taxonomic validity of this subspecies is disputed.

Taxonomy Merriam's elk was first described in 1902 by Edward William Nelson using a small number of museum specimens. It was originally classified as its own species, Cervus merriami. Nelson reported that compared to Rocky Mountain elk (Cervus canadensis nelsoni), Merriam's elk had a darker nose and a more reddish head and legs, as well as a larger head, among other notable anatomic features. However, in the mid Twentieth Century, morphological analyses of remaining specimens assigned to Merriam's elk determined that these specimens fell within the parameters of individual variation of Rocky Mountain elk specimens. This led to the reclassification of Merriam's elk as a subspecies of C. canadensis (C. c. merriami, historically called C. elaphus merriami). Several genetic studies of elk across North America have found no discernible difference between the DNA markers of Merriam's elk specimens and Rocky Mountain elk, leading many researchers to conclude that Merriam's elk is not a valid subspecies, and instead represents a historically southern population of Rocky Mountain elk (C. canadensis). In 2017, the International Union for Conservation of Nature (IUCN) reclassified all North American elk subspecies, excluding the Tule elk and Roosevelt elk, as C. c. canadensis. This taxonomic ruling means that Merriam's elk is not an extinct species or subspecies, but rather a population of Rocky Mountain elk that was extirpated (locally extinct) or depleted from large swathes of its former home range.

Extinction From the first New World arrival of Europeans, unregulated hunting, rapid growth of farms and ranches, and uncontrolled livestock grazing had driven the subspecies into extinction. Actual records on wildlife management were not reliably maintained until the late 19th century; the population of Merriam's elk was experiencing notable decline by the beginning of the 20th century, with the approximate year of extinction being 1906. Another subspecies of elk, the eastern elk (Cervus canadensis canadensis), also became extinct at roughly the same time.

See also List of extinct animals of North America

References

Illustrations

Worked examples

Example 1 — a first encounter with Merriam's elk

Start with the simplest possible case. Write down what Merriam's elk 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 Merriam's elk 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 Merriam's elk 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 Merriam's elk

In research: Merriam's elk 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 Merriam's elk 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: Merriam's elk is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cervus, Extinct animals of Mexico, Extinct animals of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Merriam's elk 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 Merriam's elk in 20 minutes

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

Frequently asked questions

What is Merriam's elk in simple terms?

Why does Merriam's elk 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 Merriam's elk?

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 Merriam's elk.