Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana)
Sixty morphospecies of Decapoda (Malacostraca: Crustacea) representing 34 families were recorded in the material collected in 2012 from 265 van Veen grab (0.1 m2) samples, from the nine transects distributed along the coast of Ghana in the 25–1000 m depth range. The examined material was dominated b...
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Institute of Oceanology of the Polish Academy of Sciences
2024-04-01
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| Series: | Oceanologia |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S007832342300088X |
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| author | Krzysztof Podwysocki Krzysztof Pabis Ferran Palero Magdalena Błażewicz Bjørn Serigstad |
| author_facet | Krzysztof Podwysocki Krzysztof Pabis Ferran Palero Magdalena Błażewicz Bjørn Serigstad |
| author_sort | Krzysztof Podwysocki |
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| description | Sixty morphospecies of Decapoda (Malacostraca: Crustacea) representing 34 families were recorded in the material collected in 2012 from 265 van Veen grab (0.1 m2) samples, from the nine transects distributed along the coast of Ghana in the 25–1000 m depth range. The examined material was dominated by the Diogenidae, Panopeidae, Leucosiidae, Pilumnidae and Xanthidae families. Species accumulation curves showed undersampling of the studied area and a large number of the morphospecies comprised singletons and doubletons. Panopeus africanus was the most frequent morphospecies in the analysed material (9.1% of all samples). We observed a substantial decrease of diversity (Shannon Index) and abundance along a depth gradient. Species richness also decreased with depth, starting from the highest number of morphospecies ‒ 38 at 25 m depth, then 33 at 50 m, 17 at 100 m, 11 at 250 m, 8 at 500 m and ending with 1 morphospecies at 1000 m bottom depth. Higher diversity was observed on the continental shelf (25–250 m – 57 morphospecies), while on the slope (500–1000 m) only eight morphospecies were recorded. Numerous factors of natural and anthropogenic origin may affect decapod communities on the coast of Ghana. Since our material was collected using a sampler collecting material at a very small scale, the observed patterns might be affected by the sampling method. |
| format | Article |
| id | doaj-art-0feee6f66a214099aba83140f7126c69 |
| institution | Kabale University |
| issn | 0078-3234 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Institute of Oceanology of the Polish Academy of Sciences |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj-art-0feee6f66a214099aba83140f7126c692025-08-20T03:54:29ZengInstitute of Oceanology of the Polish Academy of SciencesOceanologia0078-32342024-04-0166222023810.1016/j.oceano.2023.11.003Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana)Krzysztof Podwysocki0Krzysztof Pabis1Ferran Palero2Magdalena Błażewicz3Bjørn Serigstad4Corresponding author at: Department of Invertebrate Zoology and Hydrobiology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland.; Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland; Cavanilles Institute of Biodiversity and Evolutionary Biology, Valencia, Paterna, Spain; Institute of Marine Research, Bergen, NorwayFaculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland; Cavanilles Institute of Biodiversity and Evolutionary Biology, Valencia, Paterna, Spain; Institute of Marine Research, Bergen, NorwayFaculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland; Cavanilles Institute of Biodiversity and Evolutionary Biology, Valencia, Paterna, Spain; Institute of Marine Research, Bergen, NorwayFaculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland; Cavanilles Institute of Biodiversity and Evolutionary Biology, Valencia, Paterna, Spain; Institute of Marine Research, Bergen, NorwayFaculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland; Cavanilles Institute of Biodiversity and Evolutionary Biology, Valencia, Paterna, Spain; Institute of Marine Research, Bergen, NorwaySixty morphospecies of Decapoda (Malacostraca: Crustacea) representing 34 families were recorded in the material collected in 2012 from 265 van Veen grab (0.1 m2) samples, from the nine transects distributed along the coast of Ghana in the 25–1000 m depth range. The examined material was dominated by the Diogenidae, Panopeidae, Leucosiidae, Pilumnidae and Xanthidae families. Species accumulation curves showed undersampling of the studied area and a large number of the morphospecies comprised singletons and doubletons. Panopeus africanus was the most frequent morphospecies in the analysed material (9.1% of all samples). We observed a substantial decrease of diversity (Shannon Index) and abundance along a depth gradient. Species richness also decreased with depth, starting from the highest number of morphospecies ‒ 38 at 25 m depth, then 33 at 50 m, 17 at 100 m, 11 at 250 m, 8 at 500 m and ending with 1 morphospecies at 1000 m bottom depth. Higher diversity was observed on the continental shelf (25–250 m – 57 morphospecies), while on the slope (500–1000 m) only eight morphospecies were recorded. Numerous factors of natural and anthropogenic origin may affect decapod communities on the coast of Ghana. Since our material was collected using a sampler collecting material at a very small scale, the observed patterns might be affected by the sampling method.http://www.sciencedirect.com/science/article/pii/S007832342300088XBenthosDeep seaDepth gradientDistribution patternsDiversity |
| spellingShingle | Krzysztof Podwysocki Krzysztof Pabis Ferran Palero Magdalena Błażewicz Bjørn Serigstad Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) Oceanologia Benthos Deep sea Depth gradient Distribution patterns Diversity |
| title | Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) |
| title_full | Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) |
| title_fullStr | Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) |
| title_full_unstemmed | Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) |
| title_short | Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana) |
| title_sort | low abundance and high patchiness of decapod fauna sampled with van veen grab on the west african continental margin gulf of guinea ghana |
| topic | Benthos Deep sea Depth gradient Distribution patterns Diversity |
| url | http://www.sciencedirect.com/science/article/pii/S007832342300088X |
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