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Armonies, W. (1987). Freilebende Plathelminthen in supralitoralen Salzwiesen der Nordsee: Ökologie einer borealen Brackwasser-Lebensgemeinschaft. Microfauna Marina. 3: 81-156.
1696
Armonies, W.
1987
Freilebende Plathelminthen in supralitoralen Salzwiesen der Nordsee: Ökologie einer borealen Brackwasser-Lebensgemeinschaft
Microfauna Marina
3: 81-156
Publication
Available for editors  PDF available [request]
At the island of Sylt, North Sea, the plathelminth fauna of supralittoral salt marshes was investigated. A total of 103 species is recorded, 75 of which were found throughout the year. These species are truely brackish. 78 % of them perform univoltine life-cycles. Salinity, oxygen, and water availability are less stable in salt marshes than further seaward in the tidal zone. Many plathelminth species are able to encyst when conditions deteriorate. Thus they can withstand intermittent harshness. It is shown that every common plathelminth species prefers a distinct range of salinity. In species capable of encystment, every change in salinity causes a change in abundance. Regarding all plathelrninth species, salinity affects the species composition. The plathelminth distribution pattern is determined by (1) salinity, (2) oxygen availability, and (3) temperature. Together with differences in ground relief, water content, sediment composition, vegetation density, and insolation these factors form a patchy environment. Sites of similar combination of factors are patchily distributed, and the plathelminth distribution matches these mosaics. Thus, the distribution of species is non-random in salt marshes. A modified index of 'mean crowding' (LLOYD 1967) is proposed to describe the distribution of species in patchy environments. From the distribution pattern, the combination of the factors preferred is extracted. Closely related species differ in the preferred ranges, and their niches overlap to a small extent only.
North Sea (and Channel)
Ecology
Fauna and Flora, Faunistic inventories, Checklists, Catalogues
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Germany for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
Germany for Anthopharynx sacculipenis Ehlers, 1972 
Germany for Anthopharynx vaginatus Karling, 1940 
Germany for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
Germany for Bresslauilla relicta Reisinger, 1929 
Germany for Byrsophlebs dubia (Ax, 1956) Karling, 1985 
Germany for Coelogynopora schulzii Meixner, 1938 
Germany for Macrostomum balticum Luther, 1947 
Germany for Mecynostomum auritum (Schultze, 1851) 
Germany for Monocelis lineata (Müller, 1773) Oersted, 1843 
Germany for Parautelga bilioi Karling, 1964 
Germany for Pogaina suecica (Luther, 1948) Marcus, 1954 
Germany for Postmecynostomum pictum Dörjes, 1968 
Germany for Pratoplana salsa Ax, 1960 
Germany for Proxenetes bilioi Den Hartog, 1966 
Germany for Proxenetes britannicus Den Hartog, 1966 
Germany for Proxenetes deltoides Den Hartog, 1965 
Germany for Proxenetes puccinellicola Ax, 1960 
Germany for Ptychopera westbladi (Luther, 1943) Den Hartog, 1964 
Germany for Vejdovskya halileimonia Ax, 1960 
Germany for Vejdovskya pellucida (Schultze, 1851) Graff, 1905 
Germany for Westbladiella obliquepharynx Luther, 1943 
Germany for Zonorhynchus salinus Karling, 1952 
North Sea for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
North Sea for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
North Sea for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
North Sea for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
North Sea for Acrorhynchides robustus (Karling, 1931) Strand, 1928 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Adenopharynx mitrabursalis Ehlers, 1972 
North Sea for Anthopharynx sacculipenis Ehlers, 1972 
North Sea for Anthopharynx sacculipenis Ehlers, 1972 
North Sea for Anthopharynx sacculipenis Ehlers, 1972 
North Sea for Anthopharynx sacculipenis Ehlers, 1972 
North Sea for Anthopharynx sacculipenis Ehlers, 1972 
North Sea for Archilopsis unipunctata (Fabricius, 1826) 
North Sea for Archilopsis unipunctata (Fabricius, 1826) 
North Sea for Archimonotresis limophila Meixner, 1938 
North Sea for Archimonotresis limophila Meixner, 1938 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Baicalellia brevituba (Luther, 1918) Nasonov, 1930 
North Sea for Balgetia semicirculifera Karling, 1962 
North Sea for Brederveldia bidentata Van Der Velde & Van De Winkel, 1975 
North Sea for Bresslauilla relicta Reisinger, 1929 
North Sea for Bresslauilla relicta Reisinger, 1929 
North Sea for Bresslauilla relicta Reisinger, 1929 
North Sea for Bresslauilla relicta Reisinger, 1929 
North Sea for Bresslauilla relicta Reisinger, 1929 
North Sea for Byrsophlebs dubia (Ax, 1956) Karling, 1985 
North Sea for Byrsophlebs dubia (Ax, 1956) Karling, 1985 
North Sea for Byrsophlebs dubia (Ax, 1956) Karling, 1985 
North Sea for Byrsophlebs dubia (Ax, 1956) Karling, 1985 
North Sea for Castrada (Castrada) subsalsa Luther, 1946 
North Sea for Castrada (Castrada) subsalsa Luther, 1946 
North Sea for Castrada (Castrada) subsalsa Luther, 1946 
North Sea for Coelogynopora biarmata Steinböck, 1924 
North Sea for Coelogynopora schulzii Meixner, 1938 
North Sea for Coelogynopora schulzii Meixner, 1938 
North Sea for Coelogynopora schulzii Meixner, 1938 
North Sea for Coelogynopora schulzii Meixner, 1938 
North Sea for Coronhelmis inornatus Ehlers, 1974 
North Sea for Coronhelmis lutheri Ax, 1951 
North Sea for Coronhelmis multispinosus Luther, 1948 
North Sea for Coronhelmis multispinosus Luther, 1948 
North Sea for Coronhelmis multispinosus Luther, 1948 
North Sea for Coronopharynx pusillus Luther, 1962 
North Sea for Diascorhynchus serpens Karling, 1949 
North Sea for Doliopharynx geminocirro Ehlers, 1972 
North Sea for Gyratrix hermaphroditus Ehrenberg, 1831 
North Sea for Halammovortex nigrifrons (Karling, 1935) Karling, 1943 
North Sea for Haloplanella curvistyla Luther, 1946 
North Sea for Haloplanella curvistyla Luther, 1946 
North Sea for Haloplanella hamulata Ehlers, 1974 
North Sea for Haloplanella minuta Luther, 1946 
North Sea for Haloplanella obtusituba Luther, 1946 
North Sea for Haloplanella obtusituba Luther, 1946 
North Sea for Haloplanella obtusituba Luther, 1946 
North Sea for Haloplanella obtusituba Luther, 1946 
North Sea for Hoplopera littoralis Karling, 1957 
North Sea for Hoplopera pusilla Ehlers, 1974 
North Sea for Hoplopera pusilla Ehlers, 1974 
North Sea for Itaipusa scotica (Karling, 1954) Karling, 1978 
North Sea for Lutheriella diplostyla Hartog, 1966 
North Sea for Lutheriella diplostyla Hartog, 1966 
North Sea for Macrostomum balticum Luther, 1947 
North Sea for Macrostomum balticum Luther, 1947 
North Sea for Macrostomum balticum Luther, 1947 
North Sea for Macrostomum balticum Luther, 1947