說明
This study aims to do a repeated survey along two proglacial chronosequences near Kongsfjorden, Svalbard. This study will revisit and sample the same sites as those studied by Hodkinson et al. (2004) in their work "invertebrate community assembly along proglacial chronosequences in the high Arctic". their study demonstrated that the succession was predictable, directional and deterministic closely linked to plant colonisation, soil development and species specific traits.
Since the study was conducted in 2004 climate change has increased temperatures causing the glacier to further retreat. With temperatures in Svalbard increasing with approximately four degrees in the past century. The Arctic is particularly vulnerable to climate change due to a phenomenon known as Arctic amplification, whereby the region is warming up to four times faster than the global average.
In addition to analysing community assembly and assessing explanatory abiotic/biotic factors, we're also evaluating potential climate-driven shift in colonisation patterns.
資料紀錄
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版本
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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 The University Centre in Svalbard。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: a93a9b5b-1240-4163-8eb4-b4775620d91e。 The University Centre in Svalbard 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
Earth Science > Biosphere > Ecosystems > Terrestrial ecosystems > Alpine/Tundra > Arctic tundra; Earth science > Biological classification > Animals/invertebrates; Earth science > Human dimensions > Climate change responses; Earth science > Biosphere > Ecological dynamics > Community dynamics > Plant succession; Earth science > Agriculture > Soils > Soil pH; Earth science > Agriculture > Soils > Soil moisture/water content; Earth science > Agriculture > Soils > Carbon; Occurrence; Observation
聯絡資訊
- 出處
地理涵蓋範圍
Kongsfjorden NYA - Lovénbreen, Storholmen, Midtholmen.
| 界定座標範圍 | 緯度南界 經度西界 [78.892, 12.072], 緯度北界 經度東界 [78.935, 12.299] |
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分類群涵蓋範圍
無相關描述
| Kingdom | Animalia |
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| Phylum | Arthropoda |
| Class | Enthognatha, Insecta, Arachnida |
| Order | Acari, Araneae, Collembola |
計畫資料
無相關描述
| 計畫名稱 | UNIS AB-201 |
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| 辨識碼 | https://www.wikidata.org/wiki/Q119442230 |
參與計畫的人員:
- 研究主持人
取樣方法
At each site three plots were established, selected based on the presence of either Saxifraga oppositifolia or Salix polaris and each plot had to be at least 10 meters apart. From each plot, two invertebrate samples were extracted containing one of the two focal plant species. Moisture content of the local sample area was measured and noted with a Delta-T SM150 moisture-meter. Afterwards, the samples were cut 10x10x10 centimeters with a knife, using a piece of cardboard as template and extracted with the help of a trowel where the organic layer depth was measured with a ruler (average of 4 sides of the square) as well as determining the observed parental soil type as described in the field protocol, appendix XX. Furthermore, UTM coordinates and date and time were noted for each sample. The samples were stored in, partially closed (sufficient breathing room for the invertebrate species), zip-lock bags in a 5 degrees Celsius fridge to be used for Tullgren-funnel-extraction of invertebrates. In addition to the six invertebrate samples, 3 soil samples were also sampled from each site. The soil sample’s requirements were to be extracted next to Saxifraga oppositifolia and Salix polaris with the third soil sample being extracted from a “random” spot within the site. The soil samples were handled with latex gloves to prevent human contamination, as skin flakes and sweat contain organic carbon and nitrogen, which could alter the sample's C/N ratio and make the analysis unreliable. Furthermore, UTM coordinates and date and time were noted for each sample. The soil samples were stored in labeled zip-lock bags, unrefrigerated and airtight, to be used for pH measurement, C/N analysis and organic matter content.
| 研究範圍 | In total, our study included ten different sampling sites (Fig. 1). Site one through seven were the same sites used by Hodkinson et al. (2003), as shown in figure 1. The sampling sites form a chronosequence in the proglacial area of a land-terminating glacier, the Midtre Lovénbre SE of Ny-Ålesund, and represent a gradient of time exposed to the atmosphere, post-glacial retreat, where new land can be colonized by the surrounding flora and fauna. Site one to seven were located in-field via the coordinates cited in Hodkinson et al. (2003), using a Garmin eTrex GPS. Site zero, not featured in existing studies, was chosen based on recent satellite images and confirmed in the field as a suitable and relatively flat area. The age of this site was determined using Landsat 8-9 satellite imagery, identifying the absence of snow during summer months from 2023 onwards (EROS, 2013). The two additional sample sites, Midtholmen and Storholmen, located NE of Ny-Ålesund, are small islands in Kongsfjord that were released successively from beneath the ice during the regression of the main valley glacier, the Kongsbre. These islands lie 3 km from the mainland shore and are separated by approximately 1 km of open water. Unlike the mainland sites, the Lovén Island communities developed on glacial diamicton, receiving a substantial influx of nutrients from surrounding marine ecosystems (Alsos, Elvebakk & Gabrielsen 1998; Hodkinson et al. 2003). While the general sampling protocol for the islands was identical to that used at the glacier sites, the three plots for each island were intentionally spread out to ensure coverage of the whole island. |
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方法步驟描述:
- N/A
額外的詮釋資料
| 致謝 | Thank you to Anna Seniczak for her expertise and guidance in invertebrate identification. |
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| 替代的識別碼 | https://ipt.gbif.no/resource?r=chronosequence_invertebrates |