說明
In the project MICROSNOW the ecological role of the small copepod Microsetella norvegica in the sub-Arctic Balsfjorden, Norway, was investigated. Since M. norvegica is often undersampled in net hauls with a standard WP-2 net (180 µm mesh size), this project collected zooplankton water samples with a 30 L GoFlow bottle at distinct depths (0, 10, 20, 50, 90, 120 m). From the collected water, 20 L were concentrated onto a 20 µm mesh sieve, the collected zooplankton was preserved with buffered formaldehyde and later different developmental stages of M. norvegica were enumerated (adult male, adult female, copepodite stage CIV- CV, copepodite stage CI-CIII, nauplius). Under the projectID "Microsnow_2017_2018_Balsfjord" there is also an an additional data set on the zooplankton community composition at the same station (WP-2 net, 64 µm mesh size) available on GBIF.
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 24 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 UiT The Arctic University of Norway。 This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 5d37bb8b-4108-45b5-b3da-e648c95e5d5c。 UiT The Arctic University of Norway 發佈此資源，並經由GBIF Norway同意向GBIF註冊成為資料發佈者。
關鍵字
Samplingevent
聯絡資訊
- 出處 ●
- 連絡人 ●
- 研究主持人
https://orcid.org/0000-0001-9577-3935
- 處理者
- 處理者
- 處理者
地理涵蓋範圍
Svartnes, Balsfjorden, Norway (190 m bottom depth)
| 界定座標範圍 | 緯度南界 經度西界 [69.363, 19.117], 緯度北界 經度東界 [69.363, 19.117] |
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分類群涵蓋範圍
無相關描述
| Species | Microsetella norvegica |
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時間涵蓋範圍
| 起始日期 | 2017-06-19 |
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| 起始日期 | 2017-06-21 |
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| 起始日期 | 2018-06-11 |
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| 起始日期 | 2018-06-13 |
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計畫資料
Vertical export of organic carbon from pelagic to benthic ecosystems consists mainly of copepod faecal pellets and detrital aggregates (marine snow). However, it is estimated that 20-70 % of the aggregate-associated carbon is degraded by grazing organisms within the euphotic zone. One copepod species believed to play a vital role in particle flux reduction is Microsetella norvegica, but little is known about its ecology and biology. In the first year (2017) of MICROSNOW, we successfully completed high-resolution field-investigations focusing on the role of M. norvegica for regulating the pelagic-benthic coupling in Balsfjord. More specifically, we investigated the zooplankton community composition, aggregate distribution, hydrographical and chemical properties of the water column and vertical carbon fluxes. Experiments on M. norvegica egg hatching and respiration rates at 4 different temperatures, grazing experiments and behavioural studies were successfully completed and data are now being processed. In the second year of the project we will continue building a strong data-set by including new complementary investigations. We will also focus on dissemination of results through outreach and publication. Novelties within the project are: 1) high-resolution in situ mapping of marine snow and copepods, 2) identifying interactions between sinking particles and copepods through in situ video-observations and experiments and 3) increased knowledge on M. norvegica biology and its role for pelagic-benthic coupling. This is a timely approach in the context of the future role of coastal marine ecosystems as a sink or source for atmospheric CO2, and for building knowledge on the resources available for harvestable species.
| 計畫名稱 | MICROSNOW |
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| 辨識碼 | Microsnow_2017_2018_Balsfjord |
| 經費來源 | Financially supported by fram center flagship “Climate Change in Fjord and Coast” grant nr. 2019147470 292018 |
| 研究區域描述 | Svartnes, Balsfjord, Northern Norway |
| 研究設計描述 | Field sampling and analysis of field data in combination with experiments in the laboratory |
參與計畫的人員:
取樣方法
To enumerate different developmental stages of Microsetella norvegica in June 2017 and June 2018, a 30 L GoFlow bottle was in each year successively deployed to 6 water depth (surface, 10, 20, 50, 90, 120 m) on two different days. The collected water was brought on board. From each GoFlow bottle cast, 20 L water were gently emptied via a silicone tube. The water sample was concentrated onto a 20 μm meshed sieve and transferred to a PVC bottle for later counts of Microsetella norvegica. These zooplankton samples were preserved with buffered formaldehyde at 4 % final concentration.
| 研究範圍 | All samples were collected at the same station. Both in 2017 and 2018, the station was sampled twice and during each of the in total 4 sampling days, zooplankton water samples were collected at 6 depths (0, 10, 20, 50, 90, 120 m). |
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方法步驟描述:
- Zooplankton enumeration was generally done according to the procedures described in Postel et al. (2000., Biomass and abundance, p. 83-192. In R. Harris, J. Lenz, M. Huntley, P. Wiebe and H. R. Skjoldal (eds.), ICES Zooplankton Methodology Manual. Academic Press.) and Kwasniewski et al. (2010, doi: 10.1016/j.pocean.2010.06.004).
- Only a sub-sample was identified and counted. A box splitter was used to divide the GoFlo samples into two halves, and then only 1 half was examined in its entirety due to the low zooplankton concentrations. Copepodite life stages CI-CV of M. norvegica were identified at higher magnification using the Olympus light microscope model BX50, the other indentification was mostly done in a Olympus model SZX7 stereomicroscope.