Dataset of diatoms in Dutch moorland pools: 1916 - 2022

データ レコード

この sampling event リソース内のデータは、1 つまたは複数のデータ テーブルとして生物多様性データを共有するための標準化された形式であるダーウィン コア アーカイブ (DwC-A) として公開されています。 コア データ テーブルには、407 レコードが含まれています。

拡張データ テーブルは1 件存在しています。拡張レコードは、コアのレコードについての追加情報を提供するものです。 各拡張データ テーブル内のレコード数を以下に示します。

この IPT はデータをアーカイブし、データ リポジトリとして機能します。データとリソースのメタデータは、 ダウンロード セクションからダウンロードできます。 バージョン テーブルから公開可能な他のバージョンを閲覧でき、リソースに加えられた変更を知ることができます。

バージョン

次の表は、公にアクセス可能な公開バージョンのリソースのみ表示しています。

引用方法

研究者はこの研究内容を以下のように引用する必要があります。:

van Dam H, Creuwels J, Geurts K (2024). Dataset of diatoms in Dutch moorland pools: 1916 - 2022. Version 1.1. Stichting Bargerveen. Samplingevent dataset. https://ipt.nlbif.nl/resource?r=st_bargerveen_diatoms&v=1.1

権利

研究者は権利に関する下記ステートメントを尊重する必要があります。:

パブリッシャーとライセンス保持者権利者は Stichting Bargerveen。 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF登録

このリソースをはGBIF と登録されており GBIF UUID: 0446df64-a3be-49e4-b9b9-c05218773da3が割り当てられています。   Netherlands Biodiversity Information Facility によって承認されたデータ パブリッシャーとして GBIF に登録されているStichting Bargerveen が、このリソースをパブリッシュしました。

キーワード

recovery; acidification; moorland pools; soft water lakes; Specimen

連絡先

地理的範囲

This dataset contains data collected from various moorland pools across the Netherlands.

生物分類学的範囲

Various diatom species.

時間的範囲

プロジェクトデータ

説明がありません

プロジェクトに携わる要員:

収集方法

1. Diatoms from the intensively sampled pools were collected two times a year (May and November) from 1978 to 2022, along with records of water level and samples for surface water chemistry. In the extensively sampled pools, diatoms were collected in summer or early autumn every four years from 1978 to 2012, along with chemical samples. 2. Samples were taken with a plankton net (mesh size 30-40 µm) pulled slightly through macrophytes if present, and slightly through the upper sediment layer. Until 2010 the samples were preserved with formaldehyde (4%), later on the samples were stored at -12 °C. 3. In addition to these 'recent' samples, net samples collected by J. Heimans in the years 1916 - 1932 (now in Naturalis Biodiversity Centre, Leiden) were examined, supplemented with samples from later years from employees of the former Research Institute for Nature Management (now in Meise Botanic Garden). We have made all efforts to ensure the comparability of our sampling method with the historical sample methods. 4. In the laboratory, HCl (10%) was added to remove the diatoms from the macrophyte fragments and to dissolve iron (when present). After rinsing several times with H2O, the organic material was digested by warming (80 °C) in H2O2 (30%). From 2014 onwards, KMnO4 was added after this step to end the oxidation process. After rinsing several times with H2O, slides were prepared by embedding the diatom valves in Naphrax. The slides were examined under oil immersion using a Zeiss Standard RA or Axioskop 40 microscope and phase contrast objective (x 100, NA = 1.30, total magnification x 1250). 5. During the first years of the project, diatoms were identified using van der Werff & Huls (1957-1974) and Hustedt (1927-1966, 1930) as main reference works and special publications as listed by van Dam (1984). Krammer & Lange-Bertalot (1986-1991) was used as a central reference in the following decades, supplemented by many special publications, as listed in van Dam (1984) and van Dam & Mertens (2019). The taxonomy in the checklist by van Dam et al. (1994) is used as a base-line in the present study, with some exceptions: Eunotia bilunaris var. mucophila Lange-Bertalot et al. is included in E. bilunaris (Ehrenberg) Mills, E. steineckii Petersen is included in E. exigua (De Brébisson) Rabenhorst, Frustulia rhomboides var. crassinervia (De Brébisson) Ross is included in F. saxonica Rabenhorst, Navicula heimansioides Lange-Bertalot is included in N. leptostriata E.G. Jørgensen. The group around N. subtilissima Cleve is combined to the genus Kobayasiella Lange-Bertalot. The nomenclature is adapted to the most recent insights (Guiry & Guiry, 2021). 6. In each slide, 400 valves were counted. The per cent abundance of each taxon was calculated after counting.

Method step description:

1. The identifications of the original counts were adapted to the most recent taxonomical and nomenclatural insights to create an homogeneous database.

コレクションデータ

書誌情報の引用

1. M.L. Franssen, K. Geurts, A. Mertens & H. van Dam (2024). Het referentiemeetnet vennen; langetermijnmonitoring van verzuring en klimaatverandering: temperatuur, hydrologie, chemie, kiezelwieren 1978-2022. Stichting Bargerveen, Nijmegen / Adviseur Water en Natuur, Amsterdam. 119p. http://edepot.wur.nl/654984
2. H. van Dam & A. Mertens (2023). A century of diatom monitoring in acidified and warmed Dutch moorland pools. Limnologica 99(126059): 1-13 https://doi.org/10.1016/j.limno.2023.126059

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