Overwintering survival of soil microarthropods under differing natural snow covers

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說明

The Arctic has a diverse terrestrial microarthropod fauna which overwinters in situ in soil and vegetation. This fauna is involved in key ecosystem process, for example decomposition and pollination, and has tolerance to the Arctic’s winter conditions. However, the Arctic is undergoing rapid change. Svalbard is experiencing warming rates up to four times the global average as well as alterations in precipitation (quantity and form; snow or rain) and wind direction. These will modify the conditions experienced by the overwintering fauna. Since laboratory experiments often fail to capture the diversity of environmental stressors, we employed a manipulation experiment to use the naturally accumulating snow pack to moderate soil winter soil temperatures, combined with an extended incubator treatment, to map the duration limits of naturally induced cold tolerance. We demonstrate that the Collembola fauna can tolerate temperatures of -25°C but that, in areas devoid of snow accumulation and when soil temperatures dip below -30°C there is significant mortality. Furthermore, we demonstrate that exposure to a further extended 12 month period at -6°C, as a simple model of a situation where snow cover is not lost during the short Arctic summer, results in additional mortality with relatively few Collembola surviving. By contrast, while oribatid mites displayed similar survival over a natural winter as the Collembola, they were highly resistant to the extended exposure at -6°C, with no additional mortality occurring. We also documented survival amongst other invertebrate groups, including Nematocera and Brachycera larvae, Hemiptera (A. svalbardicum), Coleoptera (I. flagellum), and Araneae (Linyphiidae). We conclude that snow depth and winter air temperatures interact to regulate soil microarthropod populations over local scales and the functioning of the Arctic soil ecosystem. Moreover, the environmental changes currently being observed in polar regions will continue to modify this fauna and its local and micro-scale distribution.

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 7 筆紀錄。

亦存在 2 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。

610

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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。:

Interactions between winter temperatures and duration of exposure may structure Arctic microarthropod communities Stephen James Coulson, Peter Convey, Sil Schuuring, Simone Iris Lang Journal of Thermal Biology

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: 9bf3a189-b38c-4999-a7b3-f926b51769f8。 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

Polar; Snow; Climate change; Soil; Invertebrate

聯絡資訊

Stephen Coulson

元數據提供者 ●
出處 ●
使用者 ●
連絡人

Professor

University Centre in Svalbard (UNIS)

pb156

9171 Longyearbyen

Svalbard

stevec@unis.no

https://www.unis.no/staff/steve-coulson/

https://orcid.org/0000-0003-0935-959X

地理涵蓋範圍

Svalbard

界定座標範圍	緯度南界經度西界 [-90, -180], 緯度北界經度東界 [90, 180]

取樣方法

Sampling 10*10cm soil cores through the organic soil, c. 5 to 10cm.

研究範圍	Dryas octopetala tundra at the entrance to Endalen, Svalbard.

方法步驟描述:

See paper: Interactions between winter temperatures and duration of exposure may structure Arctic microarthropod communities Stephen James Coulson, Peter Convey, Sil Schuuring, Simone Iris Lang. Journal of Thermal Biology

收藏資料

蒐藏名稱	UNIS invertebrate collection

標本保存方法	Alcohol

額外的詮釋資料

目的
維護說明	This was a one-off study and the data set will not be extended further.
替代的識別碼	https://ipt.gbif.no/resource?r=invert_cold_survival