WorldCat Identities

Elmgren, Ragnar

Overview
Works: 19 works in 33 publications in 2 languages and 272 library holdings
Roles: Author, Other, Thesis advisor, Editor
Publication Timeline
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Most widely held works by Ragnar Elmgren
The benthic macro- and meiofauna of the Askö-Landsort area (Northern Baltic proper) : a stratified random sampling survey by Sven Ankar( Book )

4 editions published in 1976 in English and held by 16 WorldCat member libraries worldwide

The Tsesis oil spill : report of the first year scientific study (October 26, 1977 to December 1978)( Book )

2 editions published in 1980 in English and held by 10 WorldCat member libraries worldwide

The benthic macro-and meiofauna of the Askö-Landsort area (northern Baltic proper) by Sven Ankar( Book )

1 edition published in 1976 in English and held by 6 WorldCat member libraries worldwide

Ecological studies of two shallow brackish water ecosystem[s] by Ragnar Elmgren( Book )

1 edition published in 1974 in English and held by 5 WorldCat member libraries worldwide

Ecological studies of shallow brackish water ecosystem[s] by Ragnar Elmgren( Book )

2 editions published in 1974 in English and held by 4 WorldCat member libraries worldwide

Benthic macro- and meiofauna in the Gulf of Bothnia (northern Baltic)( Book )

1 edition published in 1984 in English and held by 3 WorldCat member libraries worldwide

The Tsesis oil spill : report of the first year scientific study (October 26, 1977 to December 1978 by J. J Kineman( Book )

3 editions published in 1980 in English and held by 3 WorldCat member libraries worldwide

Benthic macro- and meiofauna in the Gulf of Bothnia (Northern Baltic)( Book )

1 edition published in 1984 in English and held by 2 WorldCat member libraries worldwide

The Tsesis oil spill : report of the first year scientific study (October 26, 1977 to December 1978)( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Eutrofiering i marin miljö : Forskningsprogram 1983-1989( Book )

1 edition published in 1986 in Swedish and held by 1 WorldCat member library worldwide

Tsesis Oil Spill: Its Impact On The Coastal Ecosystem Of The Baltic Sea by O Lindén( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Adult interference with postlarvae in soft sediments : the Macoma-Pontoporeia example( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

The thesis oil spill, acute and long-term impact on the benthic ecosystem( Book )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

Fisk eller olja ur havet? vad säger forskarna? : aktuell debatt om havet by Hans Ackefors( Recording )

1 edition published in 2008 in Swedish and held by 1 WorldCat member library worldwide

Ecological studies of two shallow brackish ecosystem by Ragnar Elmgren( Book )

1 edition published in 1974 in English and held by 1 WorldCat member library worldwide

Benthic use of phytoplankton blooms : uptake, burial and biodiversity effects in a species-poor system by Agnes M.L Karlson( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Animals living in marine sediments (the second largest habitat on earth) play a major role in global biogeochemical cycling. By feeding on organic matter from settled phytoplankton blooms they produce food for higher trophic levels and nutrients that can fuel primary production. In the Baltic Sea, anthropogenic stresses, such as eutrophication and introductions of invasive species, have altered phytoplankton dynamics and benthic communities. This thesis discusses the effects of different types of phytoplankton on the deposit-feeding community and the importance of benthic biodiversity for fate of the phytoplankton bloom-derived organic matter. Deposit-feeders survived and fed on settled cyanobacterial bloom material and in doing so accumulated the cyanobacterial toxin nodularin. Their growth after feeding on cyanobacteria was much slower than on a diet of spring bloom diatoms. The results show that settling blooms of cyanobacteria are used as food without obvious toxic effects, although they do not sustain rapid growth of the fauna. Since all tested species accumulated the cyanotoxin, negative effects higher up in the food web can not be ruled out. Both species composition and richness of deposit-feeding macrofauna influenced how much of the phytoplankton bloom material that was incorporated in fauna or retained in the sediment. The mechanism behind the positive effect of species richness was mainly niche differentiation among functionally different species, resulting in a more efficient utilization of resources at greater biodiversity. This was observed even after addition of an invasive polychaete species. Hence, species loss can be expected to affect benthic productivity negatively. In conclusion, efficiency in organic matter processing depends both on pelagic phytoplankton quality and benthic community composition and species richness
Structure and dynamics of Baltic benthos communities, with particular reference to the relationship between macro- and meiofauna by Ragnar Elmgren( Book )

1 edition published in 1978 in English and held by 0 WorldCat member libraries worldwide

Biological effects of eutrophication in the Baltic Sea, particularly the coastal zone by Hans Cederwall( Book )

1 edition published in 1990 in English and held by 0 WorldCat member libraries worldwide

 
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Audience level: 0.63 (from 0.42 for The Tsesis ... to 1.00 for Biological ...)

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