biology

Harald W. Krenn

Harald W. Krenn 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 Harald W. Krenn rather than just read about it. In short: Harald W. Krenn (born 25 October 1958) is an Austrian biologist and a professor for integrative zoology at the Fakultät für Lebenswissenschaften at the University of Vienna.

Key takeaways

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Reference excerpt

Harald W. Krenn (born 25 October 1958) is an Austrian biologist and a professor for integrative zoology at the Fakultät für Lebenswissenschaften at the University of Vienna.

Life Harald W. Krenn studied biology and earth science from 1977 to 1978 and zoology and botany at the University of Vienna. He finished a study of lectureship and environmental science and received his PhD in 1987 in zoology and botany. Next to his work as a teacher of biology and as a product manager in the pharmaceutical industry Krenn became assistant professor in 1993 at the Institut für Zoologie at the University of Vienna. After his habilitation in 2001 he became assistant professor at the department of evolutionary biology and from 2012 on at the department of Intergative Zoologie. Since 2012 Krenn has been head of Studienprogramme in biology at the University of Vienna.

Scientific contributions The investigation of Krenn and co-workers contributed to reveal the form and functional mechanism of insect mouthparts relationships. The study of insect mouthparts was helpful for the understanding of the functional mechanism of the proboscis of butterflies (Lepidoptera) to elucidate the evolution of new forms and functions. The study of the proboscis of butterflies revealed surprising examples of adaptations to different kinds of fluid food, for example nectar, plant sap, tree sap, dung) and of adaptations to the use of pollen as complementary food in butterflies of the Neotropical genus Heliconius. An extremely-long proboscis appears within multiple groups of flower visiting insects but is relatively rare. Current studies represent the first attempt to evaluate the costs and benefits of these long sucking organs taking into consideration sucking and pumping organs of different insects. In a group of Lepidoptera, novel mouthpart organs were analysed in detail, not homologous to related raxa. A novel mouth part organ evolved in the female yucca moth and serves for the pollination of the larval host plant.

Practical research activity Krenn's research activity combines experimental field work, for example at the tropical Field Station La Gamba, Costa Rica, with morphological and experimental studies at the University of Vienna.

Academic memberships Deutsche Zoologische Gesellschaft Austrian Entomological Society Birdlife Austria Auring-Verein Societas Europaea Lepidopterologica

Publications Selected papers:

H. W. Krenn, J. Plant, N. U. Szucsich (2005) "Mouthparts of flower-visiting insects". In: Arthropod Structure & Development. 34, 2005, S. 1–40. doi:10.1016/j.asd.2004.10.002 pdf Archived 2017-03-04 at the Wayback Machine H. W. Krenn, B-A. Gereben-Krenn, B. M. Steinwender, A. Popov: "Flower visiting Neuroptera: mouthparts and feeding behaviour of Nemoptera sinuata (Nemopteridae)." In: European Journal of Entomology. 105, 2008, S. 267–277. pdf H. W. Krenn, H. Aspöck: "Form, Function and Evolution of the Mouthparts of Blood-Sucking Arthropods". In: Arthropod Structure & Development. 41, 2012, S. 101–118 doi:10.1016/j.asd.2011.12.001. A. Wilhemi, H. W. Krenn: "Elongated mouthparts of nectar-feeding Meloidae (Coleoptera)". In: Zoomorphology. 131, 2012, S. 325–337 doi:10.1007/s00435-012-0162-3. F. Karolyi, N. U. Szucsich, J. F. Colville, H. W. Krenn: "Adaptations for nectar-feeding in the mouthparts of long-proboscid flies (Nemestrinidae: Prosoeca)". In: Biological Journal of the Linnean Society. 107, 2012, S. 414–424. doi: 10.1111/j.1095-8312.2012.01945.x

References

External links ResearchGate Publication list

Worked examples

Example 1 — a first encounter with Harald W. Krenn

Start with the simplest possible case. Write down what Harald W. Krenn 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 Harald W. Krenn 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 Harald W. Krenn 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 Harald W. Krenn

In research: Harald W. Krenn 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 Harald W. Krenn 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: Harald W. Krenn is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1958 births, 21st-century Austrian biologists, Evolutionary biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Harald W. Krenn 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 Harald W. Krenn in 20 minutes

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Frequently asked questions

What is Harald W. Krenn in simple terms?

Harald W. Krenn (born 25 October 1958) is an Austrian biologist and a professor for integrative zoology at the Fakultät für Lebenswissenschaften at the University of Vienna.

Why does Harald W. Krenn 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 Harald W. Krenn?

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 Harald W. Krenn.