Number 01
http://edoc.hu-berlin.de/18452/26764
2024-03-29T01:34:41ZProceedings in Marine Biology - Volume 4, Number 1, 2024
http://edoc.hu-berlin.de/18452/29088
Proceedings in Marine Biology - Volume 4, Number 1, 2024
Stach, Thomas; Lüter, Carsten
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28418
Stach, Thomas; Lüter, Carsten
“Proceedings in Marine Biology” is an international journal publishing original research by graduate students on all aspects of marine biology. Subjects covered include: ecological surveys and population studies of oceanic, coastal and shore communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants. Papers are also published on techniques employed at sea for sampling, recording, capture and observation of marine organisms.
This volume deals exlusively with the results of the research field trip of the Humboldt-Universität zu Berlin to the AWI - Biologische Anstalt Helgoland (Germany) from 26.09. - 05.10.2023
2024-03-27T00:00:00ZBiodiversity survey of marine invertebrates of Helgoland: Anthozoa (Cnidaria)
http://edoc.hu-berlin.de/18452/29087
Biodiversity survey of marine invertebrates of Helgoland: Anthozoa (Cnidaria)
Herde, Max; Rose, Lucille
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28417
Global warming, pollution and other anthropogenic influences severely affect species richness and alter community structure and composition of marine environments globally. To better understand how marine invertebrate communities changed over the last centuries in the southern North Sea, we conducted a field study on and around the shores of the German island of Helgoland to observe selected marine environments. This study focuses on Anthozoa, a sessile group of cnidarians, because of their sensitivity to environmental changes such as global warming and pollution. We observed which anthozoan species are currently present in the rocky shore and the offshore benthic environment “Tiefe Rinne” of Helgoland and how this compares to previous estimates (37-87 years ago). The two localities observed are inhabited by different species, except one species (Sagartiogeton laceratus) that was found in both environments. Our results show that the community composition of anthozoans changed in both environments over time. While in the „Tiefe Rinne“ the species richness remained the same, the species richness in the rocky shore decreased. Our results could be explained by the displacement of certain anthozoan species due to anthropogenic impacts and the introduction of neobiotic taxa through increased global shipping. However, sampling was only conducted for a short period of time, and the possibility of misidentifications cannot be excluded. Further sampling and the addition of molecular data to improve species identification, would greatly enhance this study.
2024-03-27T00:00:00ZBiodiversity survey of marine Gastropoda of Helgoland
http://edoc.hu-berlin.de/18452/29086
Biodiversity survey of marine Gastropoda of Helgoland
von Drenkmann, Helen; Keramopoulou, Myrto
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28416
Marine Gastropoda and their distribution around the island of Helgoland (North Sea) were studied at two different locations; the intertidal zone of the northeastern rocky shore and the so-called Tiefe Rinne, a depression situated on the edge of the island with an average depth of 50 m. 31 species of gastropods were identified and the findings were compared to previous data from the same locations. The most common species in the intertidal are Littorina littorea, Littorina obtusata, Littorina saxatilis, Steromphala cineraria, and Lacuna pallidula. In the intertidal, species composition and dynamics compared to previous studies remain largely unchanged. In the area of the Tiefe Rinne, the most common species are Crepidula fornicata, Rissoa parva, Candiella plebeia, and Atalodoris inconspicua, none of which were found in this habitat in a previous study.
2024-03-27T00:00:00ZBiodiversity survey of marine invertebrates of Helgoland: Polychaeta
http://edoc.hu-berlin.de/18452/29085
Biodiversity survey of marine invertebrates of Helgoland: Polychaeta
Musolf, Janine; Ewald, Nick
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28415
To investigate the species diversity of polychaetes on Helgoland, we collected samples from a total of three different locations including rocky shore intertidal, the subtidal „Tiefe Rinne“ and plankton samples in the open sea. In this context, a total of 14 different species were identified, which were then compared with historical records. One species was found that had not previously been documented on Helgoland. Anthropogenic factors were examined, and future research possibilities were discussed.
2024-03-27T00:00:00ZBiodiversity survey of marine invertebrates of Heligoland: The subphylum “Crustacea”
http://edoc.hu-berlin.de/18452/29084
Biodiversity survey of marine invertebrates of Heligoland: The subphylum “Crustacea”
Gigliotti, Alessandro; Dima, Fahmida Sultana
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28414
The subphylum Crustacea is characterized by a huge range of morphological, developmental, and adaptive diversity across virtually all marine, freshwater, and various terrestrial habitats. They are very abundant on North Sea shores, including on the intertidal rocky mud flats of the German archipelago of Heligoland. We collected a total of 32 species on two distinct localities in proximation to the main island: the rocky mud flats on the North tip and the “Tiefe Rinne” southwest of the main island. We compared our survey with different datasets for crustacean macrofaunae on Heligoland from different time periods (1850-1950, 1984, 1950-2004, 2022) and found 12 species that were not documented in these datasets but are known for the North Sea region.
2024-03-27T00:00:00ZInvestigations on the Echinodermata Biodiversity of Heligoland
http://edoc.hu-berlin.de/18452/29083
Investigations on the Echinodermata Biodiversity of Heligoland
Kraft, Jana Marie; Thonagel, Hannes
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28413
Echinodermata are ecologically important in marine ecosystems and play a central role in the marine food web. The aim of this study is to provide an overview on the current biodiversity of Echinodermata on the coasts of Heligoland and compare our findings to historical data of the last 150 years from. We collected samples from the rocky shore next to “Lange Anna”, the “Tiefe Rinne” and the north-east harbor of Heligoland. We identified eight different species from three classes: Asteroidea, Ophiuroidea, and Echinoidea. In Asteroidea, we identified Asterias rubens and Asterina phylactica. Within Ophiuroidea, three species were identified: Amphipholis squamata, Amphiura chiajei, and Ophiuocten affinis. In Echinoidea, we found three species: Echinocyamus pusillus, Psammechinus miliaris, and Strongylocentrotus droebachiensis. Generally, low numbers of Asteroidea and Echinoidea were found, while most individuals were Ophiuroidea. With A. phylactica we have been able to identify a new species that had not been found in Heligoland before. We suggest that rising water temperatures around Heligoland may have led to this new species that is normally found more southerly occurring in this habitat.
2024-03-27T00:00:00ZA survey of the biodiversity of Tunicata with a focus on Ascidiacea in the waters of Heligoland Island, North Sea
http://edoc.hu-berlin.de/18452/29082
A survey of the biodiversity of Tunicata with a focus on Ascidiacea in the waters of Heligoland Island, North Sea
Gordetckaia, Olga
Lebenswissenschaftliche Fakultät
http://dx.doi.org/10.18452/28412
During a comprehensive study of the biodiversity of marine invertebrates on the island of Heligoland in September 2023, I identified 14 species of tunicates. I observed that some of these species occur only in specific locations on the island during this period and This agrees well with the results of previous studies on the distribution of species in different locations on the island. I suggest, that Molgula manhattensis is a relatively recently introduced species in this region.
2024-03-27T00:00:00Z