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<p>As part of the DAM pilot mission “MGF Ostsee”, a subsector in a marine protected area (MPA) and a neighbouring reference area (REF) in the Oderbank (eastern Baltic Sea, Germany) were sampled for meiofauna in 2021. In both areas, mobile bottom trawling fisheries (MGF) was permitted at the time of the investigations. These shall therefore serve as a baseline for future BACI studies when MGF will be excluded from the MPA. Five sites were sampled in the MPA, and three sites were sampled in the REF. These samples served for morphology-based similarity and diversity analyses to determine whether the communities of MPA and REF differ from each other. Comparisons were carried out both at the level of major meiobenthic taxa and at the species level in the Copepoda Harpacticoida. The taxa inventory revealed that the second-most common major taxon was not Copepoda but Tardigrada, followed by Annelida. Furthermore, the planktonic Calanoida were the dominant copepod taxon instead of Harpacticoida. At major taxon level, no significant differences could be proven between a meiobenthic MPA and a REF community in terms of composition, abundance and diversity, despite minor differences. However, for harpacticoid species, significant differences were detected regarding species composition and abundance values but not regarding diversity.</p>

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Baseline studies on meiofauna in the Baltic Sea before bottom-trawl fisheries exclusion III: comparison of communities in the Oderbank (eastern Baltic Sea), with special reference to the Harpacticoida (Crustacea, Copepoda)

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • Alexandra Ostmann,
  • Jana Packmor,
  • Pedro Martínez Arbizu,
  • Kai Horst George

摘要

As part of the DAM pilot mission “MGF Ostsee”, a subsector in a marine protected area (MPA) and a neighbouring reference area (REF) in the Oderbank (eastern Baltic Sea, Germany) were sampled for meiofauna in 2021. In both areas, mobile bottom trawling fisheries (MGF) was permitted at the time of the investigations. These shall therefore serve as a baseline for future BACI studies when MGF will be excluded from the MPA. Five sites were sampled in the MPA, and three sites were sampled in the REF. These samples served for morphology-based similarity and diversity analyses to determine whether the communities of MPA and REF differ from each other. Comparisons were carried out both at the level of major meiobenthic taxa and at the species level in the Copepoda Harpacticoida. The taxa inventory revealed that the second-most common major taxon was not Copepoda but Tardigrada, followed by Annelida. Furthermore, the planktonic Calanoida were the dominant copepod taxon instead of Harpacticoida. At major taxon level, no significant differences could be proven between a meiobenthic MPA and a REF community in terms of composition, abundance and diversity, despite minor differences. However, for harpacticoid species, significant differences were detected regarding species composition and abundance values but not regarding diversity.