Dataset of diatoms in Dutch moorland pools: 1916 - 2022

Отбор проб
Последняя версия опубликовано Stichting Bargerveen дек. 19, 2024 Stichting Bargerveen
Дата публикации:
19 декабря 2024 г.
Опубликовано:
Stichting Bargerveen
Лицензия:
CC0 1.0

Скачайте последнюю версию данных этого ресурса в формате Darwin Core Archive (DwC-A) или метаданных ресурса в форматах EML или RTF:

Данные в формате DwC-A Скачать 407 Записи в English (106 KB) - Частота обновления: не планируется
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Описание

To monitor the recovery from acidification, diatoms from plants and surficial sediments were sampled in 11 Dutch moorland pools from 1978 to 2012. As far as we know, this is the longest series of semi-annual diatom records in stagnant shallow waters recovering from acidification. Early 20th-century samples were retrieved from collections. Changes in the diatom assemblages were assessed by analyses of traits (including pH-preference) and ecological groups. Between 1916 and 1978, the greatest species composition changes occurred in pools with relatively flat banks exposed to the air in extremely dry summers. After the dry summer of 1921, the changes were insignificant, but after the extremely dry summer of 1976, the changes were dramatic due to acidification by oxidation of the reduced sulphur and nitrogen compounds stored in the moorland pool bottom. After 1980, the changes were consistent with chemical recovery from acidification. However, there was a significant interaction with climatic factors: drought episodes in the short term and temperature increases in the long term. Some species in the samples from the last decades indicate an acid, but the eutrophic environment, due to internal eutrophication. The species composition did not return to the historical composition (1920s), as the chemical dynamics due to the large stock of sulphur and nitrogen compounds are now entirely different from those a century ago.

Записи данных

Данные этого sampling event ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 407 записей.

Также в наличии 1 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.

Event (core)
407
Occurrence 
5683

Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.

Версии

В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.

Как оформить ссылку

Исследователи должны дать ссылку на эту работу следующим образом:

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

Права

Исследователи должны соблюдать следующие права:

Публикующей организацией и владельцем прав на данную работу является Stichting Bargerveen. Насколько это возможно по закону, издатель отказался от всех прав на эти данные и посвятил их Public Domain (CC0 1.0). Пользователи могут без ограничений копировать, изменять, распространять и использовать работу, в том числе в коммерческих целях.

Регистрация в GBIF

Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: 0446df64-a3be-49e4-b9b9-c05218773da3.  Stichting Bargerveen отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке Netherlands Biodiversity Information Facility.

Ключевые слова

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

Контакты

Herman van Dam
  • Originator
  • Aquatic ecologist
Consultancy for Water and Nature
  • Spyridon Louisweg 141
NL-1034 WR Amsterdam
NL
  • +31207723295
Jeroen Creuwels
  • Originator
  • Data manager
NLBIF
  • PO Box 9517
NL-2300 RA Leiden
Zuid-Holland
NL
  • +31.71.7519600
Kevin Geurts
  • Metadata Provider
  • Point Of Contact
  • Researcher
Stichting Bargerveen
NL-6525 ED Nijmegen
NL

Географический охват

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

Ограничивающие координаты Юг Запад [50,75, 3,358], Север Восток [53,555, 7,228]

Таксономический охват

Various diatom species.

Class Bacillariophyceae (Diatoms)

Временной охват

Дата начала / Дата окончания 1916-06-29 / 2022-11-14

Данные проекта

Описание отсутсвует

Название Dataset of diatoms in Dutch moorland pools: 1916 - 2022
Идентификатор nlbif2024.001
Финансирование Funding through NLBIF call 2024

Исполнители проекта:

Kevin Geurts
Herman van Dam

Методы сбора

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.

Охват исследования 1916 - 2022
Контроль качества New or 'difficult' taxa were discussed with European colleagues (e.g. Kurt Krammer, Horst Lange-Bertalot

Описание этапа методики:

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

Данные коллекции

Название коллекции Herman van Dam (Pantentuin Meise)

Библиографические ссылки

  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

Дополнительные метаданные

Альтернативные идентификаторы 0446df64-a3be-49e4-b9b9-c05218773da3
https://ipt.nlbif.nl/resource?r=st_bargerveen_diatoms