Untersuchung über die Dominanz der invasiven Seepockenart Austrominius modestus im Eulitoral und obersten Sublitoral des Sylter Königshafens
Anthropogenic action has introduced many non-native species to different environments around the world. In northern Germany, the shores of the Island of Sylt in the Wadden Sea are no exception. Many alien species have been reported there, among them the barnacle Austrominius modestus, whose populati...
| Main Authors: | , |
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| Other Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | German |
| Published: |
Humboldt-Universität zu Berlin
2023
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| Subjects: | |
| Online Access: | http://edoc.hu-berlin.de/18452/26877 https://nbn-resolving.org/urn:nbn:de:kobv:11-110-18452/26877-0 https://doi.org/10.18452/26180 |
| Summary: | Anthropogenic action has introduced many non-native species to different environments around the world. In northern Germany, the shores of the Island of Sylt in the Wadden Sea are no exception. Many alien species have been reported there, among them the barnacle Austrominius modestus, whose population appears to have surpassed that of the native barnacles Semibalanus balanoides and Balanus crenatus over the past 15 years. In this study we analyze and compare the barnacle populations in the Intertidal and upper subtidal zone near List in the North of Sylt. It is known that previously (until 2001) S. balanoides was the most frequent barnacle species in the Intertidal zone and B. crenatus in the Subtidal zone, with only a few Austrominius modestus scattered in between. Furthermore, it was also investigated whether the three species of barnacles showed a preference for which mussel they would colonize, the native blue mussel Mytilus edulis or the neozoan Pacific oyster Magallana gigas. In our analysis, we found that the invasive species A. modestus dominated both Intertidal and upper Subtidal and outnumbers both S. balanoides and B. crenatus, which suggests that it is more competitive than the native species. Neither the native barnacles nor A. modestus showed a preference regarding the substrate. Durch menschliche Eingriffe wurden weltweit viele nicht heimische Arten in verschiedene Lebensräume eingeführt. In Norddeutschland bilden die Küsten der Insel Sylt im Wattenmeer keine Ausnahme. Viele gebietsfremde Arten wurden dort verzeichnet, darunter die Seepocke Austrominius modestus, deren Population in den letzten 15 Jahren die der einheimischen Seepocken Semibalanus balanoides und Balanus crenatus übertroffen zu haben scheint. In dieser Studie analysieren und vergleichen wir die Seepockenpopulationen in der Gezeitenzone bei List im Norden von Sylt. Es ist bekannt, dass früher (bis 2001) S. balanoides die häufigste Seepockenart im Eulitoral und B. crenatus im obersten Sublitoral war, mit nur wenigen verstreut ... |
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