Chapter 1 Geology of the Baltic Sea

Winterhalter, Boris; Flodén, Tom; Ignatius, Heikki; Axberg, Stefan; Niemistö, Lauri

doi:10.1016/s0422-9894(08)70138-7

Cited by 87 publications

(73 citation statements)

References 19 publications

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“…The source area of the Ö jlemyr cherts is presumed to be the region of the Hall Banks (algal reefs after Winterhalter et al 1981) in the Baltic Sea off the northeast coast of Gotland (Martinsson 1958) or still further north to the Gulf of Bothnia (Spjeldnaes 1985).…”

Section: Methodsmentioning

confidence: 99%

The oldest synallactid sea cucumber (Echinodermata: Holothuroidea: Aspidochirotida)

Reich¹

2010

Paläontol Z

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Aspidochirote holothurian ossicles were discovered in Upper Ordovician-aged Ö jlemyr cherts from Gotland, Sweden. The well-preserved material allows definitive assignment to the family Synallactidae, a deepsea sea cucumber group that is distributed worldwide today. The new taxon Tribrachiodemas ordovicicus gen. et sp. nov. is described, representing the oldest member of the Aspidochirotida. The further fossil record of Synallactidae and evolutionary implications are also discussed.

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Section: Methodsmentioning

confidence: 99%

The oldest synallactid sea cucumber (Echinodermata: Holothuroidea: Aspidochirotida)

Reich¹

2010

Paläontol Z

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“…Only C. strumosum and C. semerme were recorded in earlier studies of fish and seals from the Bothnian Bay (Helle & Valtonen, 1980. 1981Valtonen 1983aValtonen .…”

Section: T Hree Corynosomamentioning

confidence: 96%

“…The prevalence and mean abundance of C. semerme in the deeper study site was nearly the same in the two periods (separated by 14 years, whole time scale of these studies extending over 21 years). It shows that C. semerme, the most common marine acanthoce phalan species in seals (Dailey, 1975), has adapted to the brackish water ecosystem and survived through the varying history of the Baltic Sea following the latest glacial period (Winterhalter et al, 1981).…”

Section: T He Threementioning

confidence: 99%

Corynosomaacanthocephalans in their paratenic fish hosts in the northern Baltic Sea

Sinisalo

Valtonen

2003

Parasite

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Summary:Cystacanth stages of three Corynosoma (Acanthocephala) species, C. strumosum and C. semerme, and a new species in the Bothnian Bay, C. magdaleni, were studied in the fourhorn sculpin (Myoxocephalus quadricornis) in 1996-1997. The length of the trunk and proboscis differentiated the three species in the fish. The stability of the Corynosoma infection was studied by comparing the present results with those collected from the same areas (central and coastal) in 1977(central and coastal) in -1982(central and coastal) in (Valtonen, 1983a. As C. magdaleni and C. strumosum were not separated at that time, the joint infections of these two species (called "C. slrumosum") were compared. The stability of infection with C. semerme in the central Bothnian Bay was noticeable (prevalences were 82.9 in earlier period and 81.9 % in later period), while the prevalences of "C. strumosum" in the same areas had decreased (21 and 1 3.5 %, respectively). This is suggested to be due to the disappearance of the marine bull-rout, Myoxocephalus scorpius, from the Bothnian Bay during the 1990s due to an overall decline in salinity throughout the Baltic Sea. In the coastal area Corynosoma infection was clearly lower than in central area in both periods. 1977 (Valtonen, 1983a

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“…The soil at Möskatan in Kungsö, Herrö and Järsö Bergö are young as they have developed during (Winterhalter et al 1981). The type soils of Åland, but Mg ++ , K + and PO 4 in humus is a thin mull-type humus (or mull-like Järsö, which are high (cf.…”

Section: The Soilmentioning

confidence: 99%