The Mail-Journal, Volume 11, Number 27, Milford, Kosciusko County, 31 July 1974 — Page 8

THE MAIL-JOURNAL—Wed., July 31, 1974

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Earlham biology station operating at Dewart Lake

By ROBERT BRIDGES The Earlham college biological station is one of four field biologyteaching institutions in the state of Indiana that offer course work in limnology or lake ecology. The station is located on the southeast corner of Dewart Lake and is operated by Earlham college of Richmond The biological station, started as a summer school for high school biology teachers in the summer of 1946, presently offers undergraduate college students the opportunity to study the ecology of a glacially formed lake, Dewart Lake. An average of 10 to 12-students participate in the educational

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program during an eight-week session that begins in early June and ends in early August. Students attending the program come from a large number of colleges and universities in the Indiana and Ohio areas, and often continue their studies upon returning to their educational institutions in the fall. Eight-Week Session The eight-week session is divided into two four-week sections During the first four-weeks, students attend lectures that expose them to the basic concepts of aquatic biology, ecology and animal behavior. Each morning, six-days a week.

students attend a series of these lectures, while in the afternoons they are busy gathering plants found floating on the lake surface and submerged in both shallow and deep water. The specimens collected are brought to the central biology laboratory where they are identified and characteristics studied. Algae and invertebrates found suspended in -the lake water or attached to the surfaces of large plants and the lake bottom are also collected during the first month of study These smaller forms of life are examined microscopically in order to identify them. In late June. ( prior to the completion of the first month s work, fish and at times turtles and frogs are collected and identified. It is not uncommon to see students seining for fish along the shore of “Pooh" Island or at the the mouths of swampy areas. In addition U> learning the plant and animal inhabitants of Dewart Lake, students are exposed to basic lake chemistry and physics. Samples of water are collected from the lake and measurements of oxygen, phosphates and nitrates are taken. These substances have been found to be exceedingly important for the growth of both small and large organisms, from algae to largemouth bass. Water temperature and light transmission readings are recorded on a regular basis throughout this section of the program. Each of these factors studied helps to determine the relative condition of the lake, and the information gained during the entire first month of study enables each student to plan an independent research project that is examined during the second month of the program. Seven Under graduates This year a total of seven undergraduate students from Earlham college are participating in the program at the biological station. The independent projects this summer include behavioral studies of the blackbirds on "Pooh” Island, investigations about the behavior of dragonflies, chemical analysis of the decomposition of pond weeds, a study of bacteria and their effects upon the replenishment of important nitrogen nutrients Also, an examination of the effects of high levels of phosphates on the rate of algae growth, a determination of what invertebrates are found in different habitats within Dewart Lake,and a study of fish parasites in numerous species of fish. In addition to the undergraduate independent projects, a number of students not taking formal course work in the past have been sponsored by either federal or local funds to study various aspects of lake ecology at both Dewart and nearby lakes. For example, in 1971 three students, under the direction of Cameron Gifford, studied the chemical and physical properties of Lake Wawasee under the

Enchanted Hills Playhouse Theatre Guild is growing

A theatre enthusiast this week said “a great deal of community pride and spirit is developing amongst all the local residents who have become involved at the Enchanted Hills Playhouse this summer The writer added that players friendliness and appreciation, plus interest in the community here, has prompted many to contribute hours of time to the playhouse in every way imaginable from painting and building scenery, gathering props. concession work, ushering, organizing parade floats, not to mention the vast numbers who fill the audience for each show.

sAiYSoat i Wawasee Village 457-4350 Syracuse

It ' DAV /ORTH DENNIS - WWI QB BIOLOGICAL STATION HQ T| EARLHAM COLLEGE Bpj AT THE STATION — Shown above with the sign are Robert Bridge, director of the station, from the University of Connecticut in Storrs. Conn.; Jean Musselman from Farmington. Mich.; and Tony Cziraky of Fort Lee. N. J. Each sunfiper from 10 to 12 students participate in the program which is sponsored by Earlham college. fl IBHr 1 -fldflr-C / flhH /■ ROUTINE TESTING — Working on routine testing at the biological station on Dewart Lake are Cam Bradley of Boulder, Colo., and David Evans of Crossville. Tenn. Each summer college students spend eight weeks at Dewart Lake working on various biology studies.

sponsorship of the residents of that community. The following year the National Science foundation sponsored a study of similar properties in lakes Tippecanoe, and Webster. The findings of this latter project indicated —4hat Lake Webster had some potential problems. Since 1972 improvements, largely based on the findings of the biological station's researchers, have been initiated at Webster Lake. List Directors The 1974 program at the Earlham biological station is being directed by Robert Bridges, department of biobehavior. University of Connecticut. Storrs. Conn., and by Robert Haubrich, department of biology. Denison imiversity, Granville. Ohio.

Local residents appearing in the current production of “Fiddler on the Roof’ agree that it is a most enjoyable experience working with the players, said the spokesman, adding “Our community is fortunate to have such a fine summer theatre and we appreciate the chance to feel a part of it.” The theatre guild will be at the playhouse at 10 a m. this Thursday and persons interested in attending or assisting at the playhouse, are urged to attend. Further information may be obtained by contacting Mrs. Harry Alfrey. Jr., or Mrs. Marilyn Deck

Bridges was a student at the station in 1968, a student assistant in 1969 and is an instructor at the station this summer. Haubrich has taught at Dewart since 1967 and also carries on research - studying aggressive and territorial behavior in the

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starhead topminnow. An Earlham student, Endre Nyerges. class of 1974, is the student assistant for the 1974 program. Both the staff and students of the biological station feel fortunate to be able to study basic

principles of science at Dewart Lake and are interested in sharing and trading knowledge with the residents of Dewart Lake and others in the

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surrounding lake region. Perhaps because of this all will develop a deeper understanding of the lakes as a whole and their biology in particular.