Establishment of the Exotic Species Fucus evanescens C. Ag. (Phaeophyceae) in öresund, Southern Sweden
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S. A. Wikström
Abstract
The spread and establishment of the exotic species Fucus evanescens in Öresund, Southern Sweden was documented through inventories in 1966–72 and 2000. The species spread fast from the first known introduction in 1955, colonising harbours along the coast. After this expansion the further spread has been limited and the species is still largely confined to harbour areas, where it occurs in the same depth zone as its native relatives, F. vesiculosus, F. serratus and Ascophyllum nodosum. It is more common in the northern part of the area and has not expanded into the Baltic Sea proper. Tests of the attachment strength of F. evanescens plants suggest that the restriction to harbours is not due to the direct effects of wave exposure on adults. In the laboratory, reproductive success of F. evanescens decreased from 99% in 24 psu to 12% in 10 psu and at lower salinity reproduction failed. Growth of embryonic recruits was similarly affected by salinity. Hence, low salinity explains the limited success of F. evanescens in southern Öresund, where the salinity is low and fluctuating, and its failure to colonise the Baltic Sea proper.
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- Contents
- Subject Index
- Taxonomical Index
- Author Index
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- Comparative Study of the Volatile Compounds from Some Black Sea Brown Algae
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- Acknowledgement
- Meetings
Articles in the same Issue
- Contents
- Subject Index
- Taxonomical Index
- Author Index
- Growth and Biochemical Composition of the Diatom Phaeodactylum tricornutum at Different pH and Inorganic Carbon Levels under Saturating and Subsaturating Light Regimes
- Comparative Study of the Volatile Compounds from Some Black Sea Brown Algae
- Establishment of the Exotic Species Fucus evanescens C. Ag. (Phaeophyceae) in öresund, Southern Sweden
- Contribution to the Seaweed Flora of Namibia: New Records of Rhodophyta
- Observations on Cystoseira squarrosa De Notaris (Fucophyceae, Fucales), a Rare and Little Known Mediterranean Species, and Its Typification
- Taxonomic Notes on Marine Algae from Malaysia. VII. Five Species of Rhodophyceae, with the Description of Lomentaria gracillima sp. nov.
- A Reassessment and Reclassification of Species in the Genera Onikusa Akatsuka and Suhria J. Agardh ex Endlicher (Gelidiales, Rhodophyta) Based on Molecular and Morphological Data
- Mobility of Sulfate Ester during Structural Determinations of Red Algal Galactans
- Ceramium bisporum (Ceramiaceae, Rhodophyta), a New Record for the Mediterranean Algal Flora
- Taxonomic Notes on Marine Algae from Malaysia. VIII. Three Species of Laurencia (Rhodophyceae)
- Propagules of Alsidium corallinum (Rhodomelaceae, Rhodophyta)
- Macroalgal Volume: a Surrogate for Biomass in Some Green Algae
- Plant Resources of South-East Asia, No 15 (1). Cryptogams: Algae
- Acknowledgement
- Meetings
