Klaus Rohde

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Klaus Rohde
KlausRohde (cropped).jpeg
Born (1932-03-30) 30 March 1932 (age 91)
Alma mater
Known for
Awards Clarke Medal
Scientific career
Fields Biology, ecology, parasitology, ultrastructure
Institutions University of New England, Australia

Klaus Rohde (born 30 March 1932) is a German biologist and parasitologist at the University of New England (UNE), Australia. He is known particularly for his work on marine parasitology, evolutionary ecology, zoogeography, phylogeny, and ultrastructure of lower invertebrates.

Contents

Early life and education

Klaus Rohde was born in Brandenburg an der Havel, Germany, on 30 March 1932. [1] He attended the Saldria­ Gymnasium and Nikolai-Schule in Brandenbug, earning his Abitur in 1949. Rohde went on to study at the Teachers Training College in Brandenburg, receiving, in 1950, a Teacher's Diploma in Russian language. From 1950 to 1951, he studied Slavic languages at the University of Potsdam. Near the end of 1951 he moved from East to West Germany, enrolling at the University of Münster, studying botany, zoology, physics and physiological chemistry. Rohde undertook research for his PhD in 1954, [2] under the supervision of Berhard Rensch, a notable German zoologist; [3] his thesis was on the behaviour and physiology of Paramecium . In 1957 he was awarded his PhD, magna cum laud . [2]

Career

From 1957 to 1959, he did scientific work at ASTA-Werke, Brackwede/Westfalen (pharmaceutical industry) on the development of new tests for screening anthelminthic drugs (filariasis, hookworms, cysticercus). From 1960 to 1967, Rohde was a lecturer at the University of Malaya, Kuala Lumpur, conducting work on the taxonomy, life cycles and fine structure of trematodes and monogeneans and supervising BSc. Honours, MSc. and PhD candidates. He participated in expeditions to various parts of Malaysia and visited many countries in Eastern, Southeastern, Southern Asia, and America.

From 1967 to 1970 he was a Research Fellow (Habilitandenstipendiat) at the Ruhr University Bochum, Germany. Habilitation in Bochum was successfully concluded in 1970 with a thesis on the morphology, life cycle and ultrastructure of the aspidogastrean Multicotyle purvisi.

He moved to Australia in 1970 to assume a two-year Postdoctoral Fellowship at the University of Queensland, Australia, with research on the taxonomy, ecology, life cycles and ultrastructure of the aspidogastrean Lobatostoma manteri and various monogenea. During this period, he visited the Great Barrier Reef as part of his work. In 1972 he was Reader in Zoology at the University of Khartoum, Sudan.

1973–1976 he was Director of the Heron Island Research Station, Great Barrier Reef, conducting research on the taxonomy and ecology of Monogenea and Aspidogastrea. The University of Queensland awarded him the degree of DSc. in 1975 for his parasitological and zoological work. In 1976 he was appointed Lecturer at the University of New England (UNE), Australia, subsequently promoted to Associate Professor and Professor (Personal Chair). In 2001 he became Professor emeritus.

Research and work

Rohde's main research fields are fine structure, ecology, zoogeography, parasitology, and phylogeny of invertebrates, particularly of Aspidogastrea, Monogenea, Amphilinidea, and general aspects of ecology (niche theory, competition) and zoogeography (latitudinal gradients). He supervised many BSc.Honours, MSc. and PhD candidates in these fields, and, jointly with Tim Littlewood at the Natural History Museum London, Nikki Watson, UNE and others, studied the phylogeny of Platyhelminthes, using ultrastructure, life cycle and DNA data.

His most important scientific contributions are on the following topics:

Rohde was the first who supplied quantitative evidence for the enormous species diversity of marine parasites in tropical (coral reef) waters, and for differences in latitudinal gradients between endo- and ectoparasites.[ citation needed ] His hypothesis of effective evolutionary time was an important stimulus for the development of the metabolic theory of ecology. His work on the phylogeny of Platyhelminthes provided evidence that the Neodermata (major groups of parasitic Platyhelminthes) have split early off the other flatworm groups. His demonstration of the great number and variety of sensory receptors and of the great complexity of nervous systems in some parasitic flatworms is convincing evidence that sacculinization (reduction in complexity) of parasites is not a general phenomenon. Rohde's work on the ecology of marine parasites has shown that most parasites live in largely non-saturated niche space, i.e., that most niches are vacant; proceeding from these findings, he concluded that equilibrium conditions in animal communities are the exception rather than the rule (discussed in detail in his book Nonequilibrium Ecology).

After retirement he continues to publish scientific papers and books. He has cooperated with Dietrich Stauffer, a theoretical physicist, in using mathematical models to investigate latitudinal gradients in species diversity and niche width. He is running two blogs with articles and posts on science, politics and philosophy [5] and. [6]

Honors

Personal life

Rohde lived and worked in Münster/Westfalen (Germany), Brackwede/Bielefeld (Germany), Bochum (Germany), Kuala Lumpur (Malaysia), Khartoum (Sudan), Heron Island (Great Barrier Reef) and Brisbane (Australia). He now lives in Armidale (Australia).

Bibliography

Rohde has published about 480 scientific papers in international journals and book chapters, as well as several books.

Books

The first edition of Ecology of Marine Parasites, University of Queensland Press 1982, has been translated into Malay-Indonesian: Ekologi Parasit Laut, Dewan Bahasa dan Pustaka, Kuala Lumpur.

Selected papers and book chapters

Related Research Articles

<span class="mw-page-title-main">Flatworm</span> Phylum of soft-bodied invertebrates known as flatworms

The flatworms, flat worms, Platyhelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates. Unlike other bilaterians, they are acoelomates, and have no specialised circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity has only one opening for both ingestion and egestion ; as a result, the food cannot be processed continuously.

<span class="mw-page-title-main">Monogenea</span> Class of ectoparasitic flatworms

Monogeneans, members of the class Monogenea, are a group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish. They have a direct lifecycle and do not require an intermediate host. Adults are hermaphrodites, meaning they have both male and female reproductive structures.

<span class="mw-page-title-main">Aspidogastrea</span> Species of fluke

The Aspidogastrea is a small group of flukes comprising about 80 species. It is a subclass of the trematoda, and sister group to the Digenea. Species range in length from approximately one millimeter to several centimeters. They are parasites of freshwater and marine molluscs and vertebrates. Maturation may occur in the mollusc or vertebrate host. None of the species has any economic importance, but the group is of very great interest to biologists because it has several characters which appear to be archaic.

Rapoport's rule is an ecogeographical rule that states that latitudinal ranges of plants and animals are generally smaller at lower latitudes than at higher latitudes.

<span class="mw-page-title-main">Latitudinal gradients in species diversity</span> Global increase in species richness from polar regions to tropics

Species richness, or biodiversity, increases from the poles to the tropics for a wide variety of terrestrial and marine organisms, often referred to as the latitudinal diversity gradient. The latitudinal diversity gradient is one of the most widely recognized patterns in ecology. It has been observed to varying degrees in Earth's past. A parallel trend has been found with elevation, though this is less well-studied.

Thorson's rule is an ecogeographical rule which states that benthic marine invertebrates at low latitudes tend to produce large numbers of eggs developing to pelagic and widely dispersing larvae, whereas at high latitudes such organisms tend to produce fewer and larger lecithotrophic (yolk-feeding) eggs and larger offspring, often by viviparity or ovoviviparity, which are often brooded.

The hypothesis of effective evolutionary time attempts to explain gradients, in particular latitudinal gradients, in species diversity. It was originally named "time hypothesis".

The issue of what exactly defines a vacant niche, also known as empty niche, and whether they exist in ecosystems is controversial. The subject is intimately tied into a much broader debate on whether ecosystems can reach equilibrium, where they could theoretically become maximally saturated with species. Given that saturation is a measure of the number of species per resource axis per ecosystem, the question becomes: is it useful to define unused resource clusters as niche 'vacancies'?

<i>Clypeomorus batillariaeformis</i> Species of gastropod

Clypeomorus batillariaeformis, common name : the necklace or channeled cerith, is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.

The term phylogenetic niche conservatism has seen increasing use in recent years in the scientific literature, though the exact definition has been a matter of some contention. Fundamentally, phylogenetic niche conservatism refers to the tendency of species to retain their ancestral traits. When defined as such, phylogenetic niche conservatism is therefore nearly synonymous with phylogenetic signal. The point of contention is whether or not "conservatism" refers simply to the tendency of species to resemble their ancestors, or implies that "closely related species are more similar than expected based on phylogenetic relationships". If the latter interpretation is employed, then phylogenetic niche conservatism can be seen as an extreme case of phylogenetic signal, and implies that the processes which prevent divergence are in operation in the lineage under consideration. Despite efforts by Jonathan Losos to end this habit, however, the former interpretation appears to frequently motivate scientific research. In this case, phylogenetic niche conservatism might best be considered a form of phylogenetic signal reserved for traits with broad-scale ecological ramifications. Thus, phylogenetic niche conservatism is usually invoked with regards to closely related species occurring in similar environments.

Lethacotyle is a genus of polyopisthocotylean monogeneans, included in the family Protomicrocotylidae.
The genus includes only two species: Lethacotyle fijiensisManter & Price, 1953 , the type-species of the genus, and Lethacotyle veraJustine, Rahmouni, Gey, Schoelinck, & Hoberg, 2013 . Both species are parasitic on the gills of jacks in the Pacific Ocean. They are known only from three localities: off Fiji, Andaman Islands, and New Caledonia.
The genus Lethacotyle is special in that its members have no clamps on their posterior attachment organ or haptor, in contrast to most polyopisthocotylean Monogenean which have clamps. This is reflected in the etymology of the name, which, according to Manter & Price is "from letha = forgetting, and cotyle = cup, and refers to the absence of clamps".

<span class="mw-page-title-main">Haptor</span>

The haptor is the attachment organ of the monogeneans, a group of parasitic Platyhelminthes. The haptor is sometimes called opisthaptor to emphasize that it is located in the posterior part of the body, and to differentiate it from the prohaptor, a structure including glands located at the anterior part of the body. According to Yamaguti (1963), the chief adhesive organ of the monogeneans, the haptor, is posterior, more or less discoid, muscular, may be divided into alveoli or loculi, is usually provided with anchors, has nearly always marginal larval hooklets, or is in a reduced form with anchors. The haptor may consist of symmetrical or asymmetrical, sessile or pedunculate, muscular suckers or clamps with or without supporting sclerites; accessory adhesive organs may be present in form of armed plaques, lappets or appendices.

<span class="mw-page-title-main">Louis Euzet</span> French parasitologist

Louis Euzet was a French parasitologist.

Hexabothriidae is a family of monogenean parasites. The family name was proposed by Emmett W. Price in 1942. The family includes 14-16 genera according to authors and about 60 species; all are parasitic on the gills of chondrichthyan fishes.

<span class="mw-page-title-main">Neodermata</span> Clade of flatworms

Neodermata is a clade of rhabditophoran flatworms containing the parasitic groups Trematoda, Monogenea and Cestoda.

Rhabditophora is a subphylum of flatworms. It includes all parasitic flatworms and most free-living species that were previously grouped in the now obsolete class Turbellaria. Therefore, it contains the majority of the species in the phylum Platyhelminthes, excluding only the catenulids, to which they appear to be the sister group.

<span class="mw-page-title-main">Rhabdocoela</span> Order of flatworms in the class Rhabditophora

Rhabdocoela is an order of flatworms in the class Rhabditophora with about 1700 species described worldwide. The order was first described in 1831 by Christian Gottfried Ehrenberg. Most of rhabdocoels are free-living organisms, but some live symbiotically with other animals.

Delane C. Kritsky is an American parasitologist who specialised on the Monogenea, a class of parasitic flatworms which are important ectoparasites of fishes. His research was mainly in the fields of taxonomy, faunistics, and phylogeny of the Monogenea.

<span class="mw-page-title-main">Jean-Lou Justine</span> French parasitologist and zoologist

Jean-Lou Justine, French parasitologist and zoologist, is a professor at the National Museum of Natural History in Paris, France, and a specialist of fish parasites and invasive land planarians.

<span class="mw-page-title-main">Oncomiracidium</span>

An oncomiracidium is the ciliated and free-living larva of a monogenean, a type of parasitic flatworm commonly found on fish. It is similar to the miracidium of Trematoda, but has sclerotised (hardened) hooklets not found in the latter.

References

Awards
Preceded by Clarke Medal
1996
Succeeded by