說明
In the project MICROSNOW, the zooplankton community composition at station Svartnes in Balsfjorden was investigated in June 2017 and June 2018. Balsfjord is a 57 km long, narrow fjord with a shallow sill (35 m) and the bottom depth at the sampling station Svartnes is 190 m. The zooplankton was collected in vertical hauls of a WP-2 zooplankton net (mesh size 64 µm). The sampling was done in sets, consisting of deep haul (170 - 50 m) and shallow haul (50 m - surface). In 2017, 5 sets of zooplankton hauls were done (two sets on 20 June 2017, three sets on 21 June 2017) to investigate potential changes of the community composition throughout the day. In 2018, only one set (deep + shallow haul) was collected (12 June 2018). Under the projectID "Microsnow_2017_2018_Balsfjord" in GBIF also an additional data set on Microsetella norvegica (developmental stage composition from samples collected with a 30 L GoFlow bottle) is available.
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 12 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。
如何引用
研究者應依照以下指示引用此資源。:
Svensen C (2023). Zooplankton community composition in Svartnes, Balsfjord, Norway in June 2017 and June 2018 (sampled with a WP-2). Version 1.6. UiT The Arctic University of Norway. Samplingevent dataset. https://ipt.gbif.no/resource?r=microsnow2017_2018_zooplanktoncommunitycomposition_wp2&v=1.6
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: 6ce52028-93fe-43c4-a2cb-62d9adb7d5ba。 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
- 元數據提供者 ●
- 處理者
- 處理者
- 處理者
地理涵蓋範圍
The samples were collected at station Svartnes, Balsfjorden, Northern Norway (bottom depth 190 m).
| 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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時間涵蓋範圍
| 起始日期 / 結束日期 | 2017-06-20 / 2017-06-21 |
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| 起始日期 | 2018-06-12 |
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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
The zooplankton community was sampled with a WP-2 type net (Hydrobios Apparatebau GmbH, Altenholz, Germany) in two depth intervals (50-0 m and 170-50 m). Five vertical profiles (at approximately 6 h intervals) were sampled in 2017 to quantify differences in vertical abundance distributions over a 24 h cycle. In 2018, one profile for abundance quantification was sampled during daytime. The net and its cod end had a mesh size of 64 µm and was used with a closing mechanism for stratified sampling. Due to the small mesh-size, the net was hauled vertically at low speed, 0.2-0.3 m s-1. On deck, the content of the cod-end was gently rinsed onto a 64 µm sieve, transferred to 100 mL PVC bottles and preserved with sodium tetraborate buffered formaldehyde in filtered seawater at 4 % final concentration.
| 研究範圍 | All samples were taken at the same station in Balsfjorden. However, samples were taken in two different years (2017 and 2018). |
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方法步驟描述:
- Zooplankton samples were examined with an Olympus model SZX7 stereomicroscope 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).
- Zooplankton identification and counting was performed on sub-samples obtained from the whole sample by splitting with a box splitter. From each sample, a sub-sample of at least 500 individuals was examined. The remainder of the sample was screened in its entirety for the presence of individuals of rare species and ephemeral taxa.