Staying cool also has consequences: increased sea ice cover disrupts food web structure in East Antarctica-Data
最新版本 由 SCAR - AntOBIS 發佈於 Apr 8, 2019
Samples collected in the framework of a study to understand implications of these environmental changes for coastal Southern Ocean ecosystemsThis study looked at benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral summers without seasonal break-up). Using time-tested integrative trophic markers (stable isotope ratios of carbon, nitrogen and sulfur) and state-of-the-art data analysis tools (Bayesian ecological models), exploring feeding habits of benthic macroinvertebrates communities. In total, 28 taxa spanning most present animal groups and functional guilds were investigated.
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Michel L (2019): Staying cool also has consequences: increased sea ice cover disrupts food web structure in East Antarctica-Data. v1.1. SCAR - AntOBIS. Dataset/Occurrence. https://ipt.biodiversity.aq/resource?r=ddu_isotopes_verso_2013_2015&v=1.1
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關鍵字
Occurrence; Southern Ocean; Sea ice; benthic invertebrates; food web; trophic ecology
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地理涵蓋範圍
East Antarctica, Adélie Land, Dumont-d’Urville research station
| 界定座標範圍 | 緯度南界 經度西界 [-67, 139], 緯度北界 經度東界 [-66.5, 141] |
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分類群涵蓋範圍
無相關描述
| Genus | Acodontaster, Golfingia, Harmothoe, Hemigellius, Heterocucumis, Margarella, Marseniopsis, Deontostoma, Ophiura, Perkinsiana, Polycirrus, Staurocucumis |
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| Species | Adamussium colbecki, Ammothea carolinensis, Charcotia obesa, Decolopoda australis, Demospongiae, Diplasterias brucei, Flabegraviera mundata, Himantothallus grandifolius, Homaxinella balfourensis, Isotealia antarctica, Laternula elliptica, Mycale acerata, Odontaster validus, Parborlasia corrugatus, Phyllophora antarctica, Pygoscelis adeliae guano, Saliasterias brachiata, Sterechinus neumayeri, Trophonella longstaffi |
| Unranked | Sympagic algae |
時間涵蓋範圍
| 起始日期 / 結束日期 | 2014-01-22 / 2014-01-26 |
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| 起始日期 / 結束日期 | 2014-12-17 / 2015-01-12 |
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計畫資料
This research was funded by the Belgian Science Policy Office (BELSPO) through the vERSO project (www.rectoversoprojects, contract nr. BR/132/A1/vERSO).
| 計畫名稱 | vERS0 |
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| 研究區域描述 | Access to Dumont-d’Urville station was granted through REVOLTA 1124, a research program cofunded by the French Polar Institute Paul-Emile Victor (IPEV), MNHN, Sorbonne Université and CNRS. Authors warmly thank all involved IPEV staff for their efficient logistical support during the planning and execution of the field campaigns. |
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取樣方法
Six items (producers or organic matter pools) were identified as potential food sources for primary consumers. Sympagic algae, that mostly occurred as several cm long filaments, were sampled by SCUBA divers by scraping the lower surface of fast ice. The dominant macroalgae, the large Phaeophyceae Himantothallus grandifolius and the Rhodophyceae Phyllophora antarctica, were hand-collected by SCUBA divers. Benthic biofilm was collected by scraping rocks in situ. It was scarce in 2013-2014 but extremely abundant in 2014-2015 (thick layer of several cm covering rocks but also macroalgae and sponges, supporting information S2). Seawater for suspended particulate organic matter (SPOM) was collected through the diving holes, at 10 m depth using a Niskin bottle. 195 Seawater was then pre-sieved to remove items larger than 5 mm, and filtered on pre-combusted (4h at 400 °C) glass fiber filters (Whatman GF/F, sieve size 0.7 μm). For each SPOM sample, 20 liters of seawater were filtered. Finally, samples of the abundant deposits of guano surrounding the extensive colonies of Adélie penguins (Pygoscelis adeliae) were hand collected on land, in vicinity of the diving holes.
| 研究範圍 | Sampling took place in the surroundings of Dumont-d'Urville station (French Polar Institute Paul-Emile Victor - IPEV), on Petrels Island (Adélie Land, East Antarctica) during the austral summers of 2013-2014 (sampling dates: 22 - 26/01/2014) and 2014-2015 (sampling dates: 17/12/2014 - 12/01/2015). During these two austral summers, extreme sea ice conditions occurred, as fast ice did not undergo seasonal breakup for two successive years (ice thickness fluctuating between 40 and over 200 cm during summer, cf. supporting information S1). Two sampling sites were chosen. Site 1 ("Anse du Lion"; 140.003° E, 66.661° S) was visited during both sampling campaigns, while site 2 ("Cap des Eléphants"; 139.997° E, 66.667° S) was sampled only in 2014-2015. In both sampling campaigns, both sites were covered by a thick layer of fast ice (from around 100 to over 200 cm, supporting information S1), and holes were drilled to allow access to the sea |
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方法步驟描述:
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