biology

Nathan Havill

Nathan Havill 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 Nathan Havill rather than just read about it. In short: Nathan Peterson Havill (born 1972) is an American entomologist and evolutionary biologist. Havill is a Research Entomologist with the United States Forest Service in Hamden, Connecticut and is internationally recognized on the phylogeny of Adelgidae.

Key takeaways

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

Reference excerpt

Nathan Peterson Havill (born 1972) is an American entomologist and evolutionary biologist. Havill is a Research Entomologist with the United States Forest Service in Hamden, Connecticut and is internationally recognized on the phylogeny of Adelgidae.

Career Since 1996 Havill has been a member of the Entomological Society of America. Since 2001, he has been a member of the Connecticut Entomological Society. Since 2012, he has been a member of the Society for the Study of Evolution. His research focuses on the ecology and evolution of multi-trophic interactions and, in particular invasive pests, their natural enemies, and the impacted trees.

Selected publications Havill, Nathan P.; Montgomery, Michael E.; Keena, Melody (2011). "Hemlock woolly adelgid and its hemlock hosts: a global perspective". Implementation and Status of Biological Control of the Hemlock Woolly Adelgid (PDF). Forest Health Technology Enterprise Team. pp. 3–14. Havill, Nathan P.; Shiyake, Shigehiko; Galloway, Ashley Lamb; Foottit, Robert G.; Yu, Guoyue; Paradis, Annie; Elkinton, Joseph; Montgomery, Michael E.; Sano, Masakazu; Caccone, Adalgisa (2016). "Ancient and modern colonization of North America by hemlock woolly adelgid, Adelges tsugae (Hemiptera: Adelgidae), an invasive insect from East Asia". Molecular Ecology. 25 (9): 2065–2080. Bibcode:2016MolEc..25.2065H. doi:10.1111/mec.13589. hdl:10919/97881. PMID 26880353. S2CID 32577303. Retrieved 23 July 2023. Havill, Nathan P.; Gaimari, Stephen D.; Caccone, Adalgisa (2018). "Cryptic east-west divergence and molecular diagnostics for two species of silver flies (Diptera: Chamaemyiidae: Leucopis) from North America being evaluated for biological control of hemlock woolly adelgid". Biological Control. 121. Academic Press: 23–29. Bibcode:2018BiolC.121...23H. doi:10.1016/j.biocontrol.2018.02.004. Havill, Nathan; Cognato, Anthony; del-Val, Ek; Rabaglia, Robert; Garrick, Ryan C. (2019). "New Molecular Tools for Dendroctonus frontalis (Coleoptera: Curculionidae: Scolytinae) Reveal an East–West Genetic Subdivision of Early Pleistocene Origin". Insect Systematics and Diversity. 3 (2). Oxford University Press: 2. doi:10.1093/isd/ixz002. Retrieved 23 July 2023. Andersen, Jeremy C.; Havill, Nathan P.; Caccone, Adalgisa; Elkinton, Joseph S. (2021). "Four times out of Europe: Serial invasions of the winter moth, Operophtera brumata, to North America". Molecular Ecology. 30 (14): 3439–3452. Bibcode:2021MolEc..30.3439A. doi:10.1111/mec.15983. PMID 34033202. S2CID 234212289. Retrieved 23 July 2023. Gaimari, Stephen D.; Havill, Nathan P. (2021). "A new genus of Chamaemyiidae (Diptera: Lauxanioidea) predaceous on Adelgidae (Hemiptera), with a key to chamaemyiid species associated with Pinaceae-feeding Sternorrhyncha". Zootaxa. 5067 (1): 1–39. doi:10.11646/zootaxa.5067.1.1. PMID 34810763. Retrieved 23 July 2023. Havill, Nathan P.; Griffin, Brian P.; Andersen, Jeremy C.; Foottit, Robert G.; Justesen, Mathias J.; Caccone, Adalgisa; D'Amico, Vincent; Elkinton, Joseph S. (2021). "Species delimitation and invasion history of the balsam woolly adelgid, Adelges (Dreyfusia) piceae (Hemiptera: Aphidoidea: Adelgidae), species complex". Systematic Entomology. 46 (1): 186–204. Bibcode:2021SysEn..46..186H. doi:10.1111/syen.12456. S2CID 226336413. Retrieved 23 July 2023. Schulz, Ashley N.; Mech, Angela M.; Ayres, Matthew P.; Gandhi, Kamal J. K.; Havill, Nathan P.; Herms, Daniel A.; Hoover, Angela M.; Hufbauer, Ruth A.; Liebhold, Andrew M.; Marsico, Travis D.; Raffa, Kenneth F.; Tobin, Patrick C.; Uden, Daniel R.; Thomas, Kathryn A. (2021). "Predicting non-native insect impact: focusing on the trees to see the forest". Biological Invasions. 23 (12): 3921–3936. doi:10.1525/bio.2010.60.11.5. S2CID 28154739. Retrieved 23 July 2023. Havill, Nathan P.; Dickson, Stephen M.; Kanoti, Allison; Parisio, Michael S.; Weimer, Jennifer; Zembrzuski, Deanna (2022). "Mass deposition of hemlock woolly adelgid sexuparae on New England beaches" (PDF). Journal of the Acadian Entomological Society. 18: 14–17. Retrieved 23 July 2023. Dial, Dustin T.; Weglarz, Kathryn M.; Aremu, Akintunde O.; Havill, Nathan P.; Pearson, Taylor A.; Burke, Gaelen R.; von Dohlen, Carol D. (2022). "Transitional genomes and nutritional role reversals identified for dual symbionts of adelgids (Aphidoidea: Adelgidae)". The ISME Journal. 16 (3): 642–654. Bibcode:2022ISMEJ..16..642D. doi:10.1038/s41396-021-01102-w. PMC 8857208. PMID 34508228.

References

External links Nathan P. Havill at the USDA Nathan Havill at ResearchGate and Google Scholar

Worked examples

Example 1 — a first encounter with Nathan Havill

Start with the simplest possible case. Write down what Nathan Havill 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 Nathan Havill 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 Nathan Havill 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 Nathan Havill

In research: Nathan Havill 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 Nathan Havill 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: Nathan Havill is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1972 births, American entomologists, American evolutionary biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Nathan Havill 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 Nathan Havill in 20 minutes

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

Frequently asked questions

What is Nathan Havill in simple terms?

Why does Nathan Havill 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 Nathan Havill?

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 Nathan Havill.