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eutrophication in Lake Esrom. Verhandlungen der Internationalen Vereinig-
ung für Theoretische und Angewandte Limnologie 22. 800–804.
Pétur M. Jónasson 1984. Oxygen demand and long term changes of profundal
zoobenthos. Hydrobiologia 15. 121–126.
Pétur M. Jónasson 1984. The ecosystem of eutrophic Lake Esrom. Bls. 177–
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the world 2). Elsevier Science, Amsterdam.
Dall, P.C., Lindegaard, C., Erlendur Jónsson, Gunnar Steinn Jónsson & Pétur
M. Jónasson 1984. Invertebrate communities and their environment in the ex-
posed littoral zone of Lake Esrom, Denmark. Archiv für Hydrobiologie (Suppl.
69). 477–524.
Pétur M. Jónasson 1984. Forsuring af ferskvandets økosystemer. Naturens
Verden 1984. 106–115.
Sandlund, O.T., Jonsson, B., Hilmar J. Malmquist, Gydemo, R., Lindem, T.,
Skúli Skúlason, Sigurður S. Snorrason & Pétur M. Jónasson 1987. Habitat use
of Arctic charr Salvelinus alpinus in Thingvallavatn. Environmental Biology of
Fishes 20. 263–274.
Kairesalo, T., Karin Gunnarson, Gunnar Steinn Jónsson & Pétur M. Jónasson
1987. The occurrence and photosynthetic activity of epiphytes on the tips of
Nitella opaca AG (Charophyceae). Aquatic Botany 28. 333–340.
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Pétur M. Jónasson 1989. Nostalgiske minder fra Suserup-laboratoriet i
fyrrerne. Festskrift for Suserup-laboratoriet, Hillerød.
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Malmquist, Pétur M. Jónasson, Gydemo, R. & Lindem, T. 1988. Life history
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Malmquist, Gydemo, R., Lindem, T. & Pétur M. Jónasson 1988. Density, length
distribution and diet of age–0 Arctic charr Salvelinus alpinus in the surface
zone of Thingvallavatn. Environmental Biology of Fishes 23. 183–195.
Dall, P.C., Lindegaard, C. & Pétur M. Jónasson 1988. Water pollution in Den-
mark: A review with special reference to freshwater resources. Vatten 44. 96–103.
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Ridge lakes. Verhandlungen der Internationalen Vereinigung für Theor-
etische und Angewandte 23. 394–403.
Holopainen, I.J. & Pétur M. Jónasson 1989. Bathymetric distribution and
abundances of Pisidum (Bivalvia, Sphaeriidae) in Lake Esrom from 1954 to
1988. Oikos 55. 324–334.
Holopainen, I.J. & Pétur M. Jónasson 1989. Reproduction of Pisidium
(Bivalvia, Sphaeriidae) at different depths in Lake Esrom, Denmark. Archiv
für Hydrobiologie 116. 85–95.
Sandlund, O.T., Jonsson, B., Pétur M. Jónasson, Hilmar J. Malmquist, Skúli
Skúlason & Sigurður. S. Snorrason 1989. Reproductive investment patterns
in the polymorphic Arctic charr of Thingvallavatn, Iceland. Physiology and
Ecology Japan. Special Volume 1. 383–392.
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Jonsson, B. & Pétur M. Jónasson 1989. Shape polymorphism in Arctic Charr,
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Special Volume 1. 393–404.
Kairesalo, T., Gunnar Steinn Jónsson, Karin Gunnarson & Pétur M. Jón-
asson 1989. Macro- and microalgal production within a Nitella opaca bed in
oligotrophic, subarctic Lake Thingvallavatn, Iceland. Journal of Ecology 77.
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Ferskvandsbiologisk laboratorium, Hillerød. 29 bls.
Hamburger, K., Dall, P.C. & Pétur M. Jónasson 1990. The role of Dreissena polymorpha
Pallas (Mollousca) in Lake Esrom energy budget. Verhandlungen der Internationa-
len Vereinigung für Theoretische und Angewandte Limnologie 24. 621–625.
Dall, P.C., Lindegaard, C. & Pétur M. Jónasson 1990. In-lake variations in the
compositions of zoobenthos in the littoral of Lake Esrom, Denmark. Verhandl-
ungen der Internationalen Vereinigung für Theoretische und Angewandte
Limnologie 24. 613–620.
Pétur M. Jónasson, Lindegaard, C. & Hamburger, K. 1990. Energy budgets
of Lake Esrom, Denmark: Interactions between energy flow in the pelagic,
profundal and littoral zone. Verhandlungen der Internationalen Vereinigung
für Theoretische und Angewandte Limnologie 24. 632–640.
Pétur M. Jónasson, Lindegaard, C., Dall, P.C., Hamburger, K. & Hákon Aðal-
steinsson 1990. Ecosystem studies on temperate Lake Esrom and the subarctic
lakes Mývatn and Thingvallavatn. Limnologica 20. 259–266.
Pétur M. Jónasson, Lindem, T., Sigurður S. Snorrason, Hilmar J. Malmquist,
Sandlund, O.T., Jonsson, B., Kristinn P. Magnússon, Skúli Skúlason & Gydemo,
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1991–2000
Hákon Aðalsteinsson, Pétur M. Jónasson, Gunnar Steinn Jónsson & Sigurjón
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Sandlund, O.T., Jonsson, B., Pétur M. Jónasson, Hilmar J. Malmquist, Skúli
Skúlason & Sigurður S. Snorrason 1991. The biology of threespine stickleback
Gasterosteus aculeatus L. in Thingvallavatn. Oikos 64. 365–370.
Sandlund, O.T., Karin Gunnarsson, Pétur M. Jónasson, Jonsson, B., Lindem,
T., Kristinn P. Magnússon, Hilmar J. Malmquist, Hrefna Sigurjónsdóttir, Skúli
Skúlason & Sigurður S. Snorrason 1991. The Arctic charr Salvelinus alpinus
(L.) in Thingvallavatn. Oikos 64. 305–351.
Pétur M. Jónasson, Hákon Aðalsteinsson & Gunnar Steinn Jónsson 1991.
Production and nutrient supply of phytoplankton in subarctic, dimictic
Thingvallavatn.Oikos 64. 162–187.
Pétur M. Jónasson 1991. Einer Steemann Nielsen. Bls. 133–141 í: Oversigt over
selskabets virksomhed 1990–1991. Det Kongelige Danske Videnskabernes
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J. Malmquist, Jonsson, B., Sandlund, O.T. & Skúli Skúlason 1991. Population
dynamics of the planktivorous arctic charr, Salvelinus alpinus (“murta”) in
Thingvallavatn. Oikos 64. 352–364.
Kairesalo, T., Gunnar Steinn Jónsson, Karin Gunnarsson, Lindegaard, C. &
Pétur M. Jónasson 1991. Metabolism and community dynamics within Nitella
opaca (Charophyceae) beds in Thingvallavatn. Oikos 64. 241–256.
Pétur M. Jónasson (ritstj) 1992. Ecology of oligotrophic, subarctic Thingvalla-
vatn. Oikos 64. 1–437.
Pétur M. Jónasson 1992. Exploitation and conservation of the Thingvallavatn
catchment area. Oikos 64. 32–40.
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Pétur M. Jónasson 1992. The ecosystem of Thingvallavatn. Oikos 64. 405–434.
Pétur M. Jónasson 1992. Thingvallavatn research history. Oikos 64. 15–32.
Pétur M. Jónasson 1992. Continental rifting – energy pathways of two
contrasting rift lakes. Presidential address. Verhandlungen der Internationa-
len Vereinigung für Theoretische und Angewandte Limnologie 25. 1–14.
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Sandlund, O.T. & Pétur M. Jónasson 1992. Diet differentiation in polymorphic
Arctic charr in Thingvallavatn. Journal of Animal Ecology 61. 21–35.
Pétur M. Jónasson 1992. SIL: Retrospect and future prospects. SIL News 7. 1–2.
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of limnology. Memorie dell’Istituto italiano di Idrobiologia 52. 9–26.
Pétur M. Jónasson, Jonsson, B. & Sandlund, O.T. 1994. Continental rifting and
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