Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds
Abstract Benthic primary producers are recognised for their important role in contributing to ecosystem productivity and nutrient cycling in lake and stream ecosystems, particularly in polar environments. In Arctic lakes, benthic producers often comprise mats or colonies of cyanobacteria capable of...
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crwiley:10.1111/fwb.13636 2024-06-02T08:02:42+00:00 Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds Trout‐Haney, Jessica V. Ritger, Amelia L. Cottingham, Kathryn L. Division of Integrative Organismal Systems Division of Graduate Education Division of Polar Programs 2020 http://dx.doi.org/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/fwb.13636 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 66, issue 2, page 266-277 ISSN 0046-5070 1365-2427 journal-article 2020 crwiley https://doi.org/10.1111/fwb.13636 2024-05-03T11:19:58Z Abstract Benthic primary producers are recognised for their important role in contributing to ecosystem productivity and nutrient cycling in lake and stream ecosystems, particularly in polar environments. In Arctic lakes, benthic producers often comprise mats or colonies of cyanobacteria capable of producing cyanotoxins. However, the extent to which benthic communities contribute cyanotoxins in polar regions remains poorly described. We evaluated the potential for benthic colonies of the cyanobacterium Nostoc pruniforme from lakes in Kangerlussuaq, Greenland, to contribute microcystins (MCs) to lake water using three approaches. First, we dissected field‐collected Nostoc colonies and measured MCs within multiple layers of fresh colony tissue. Second, we conducted a laboratory experiment to evaluate the temporal dynamics of MC release by incubated, intact colonies. Finally, we quantified whether MC concentrations in water and sediment samples in the field were higher in and above dense bands of benthic Nostoc as compared to bare sediment. Field‐collected Nostoc colonies contained MCs throughout the colony tissue, suggesting that damage to colonies from grazers or physical disturbance could facilitate the release of toxins into the water. Undamaged Nostoc colonies incubated in high‐nutrient conditions in the laboratory leaked MCs into the surrounding water at a steady mass‐specific rate over the course of 7 days. Microcystin concentrations in water and sediment from two Greenlandic lakes were highly variable, but slightly higher in lake water immediately above dense bands of Nostoc than in water immediately above bare sediments, suggesting that benthic Nostoc colonies contribute cyanotoxins to lake water and that MCs vary at very fine, 1–2 m spatial scales. Benthic cyanobacteria may be important in releasing MCs into aquatic ecosystems, especially in systems where benthic producers dominate, such as polar environments. Article in Journal/Newspaper Arctic Greenland greenlandic Kangerlussuaq Wiley Online Library Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Freshwater Biology 66 2 266 277 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Benthic primary producers are recognised for their important role in contributing to ecosystem productivity and nutrient cycling in lake and stream ecosystems, particularly in polar environments. In Arctic lakes, benthic producers often comprise mats or colonies of cyanobacteria capable of producing cyanotoxins. However, the extent to which benthic communities contribute cyanotoxins in polar regions remains poorly described. We evaluated the potential for benthic colonies of the cyanobacterium Nostoc pruniforme from lakes in Kangerlussuaq, Greenland, to contribute microcystins (MCs) to lake water using three approaches. First, we dissected field‐collected Nostoc colonies and measured MCs within multiple layers of fresh colony tissue. Second, we conducted a laboratory experiment to evaluate the temporal dynamics of MC release by incubated, intact colonies. Finally, we quantified whether MC concentrations in water and sediment samples in the field were higher in and above dense bands of benthic Nostoc as compared to bare sediment. Field‐collected Nostoc colonies contained MCs throughout the colony tissue, suggesting that damage to colonies from grazers or physical disturbance could facilitate the release of toxins into the water. Undamaged Nostoc colonies incubated in high‐nutrient conditions in the laboratory leaked MCs into the surrounding water at a steady mass‐specific rate over the course of 7 days. Microcystin concentrations in water and sediment from two Greenlandic lakes were highly variable, but slightly higher in lake water immediately above dense bands of Nostoc than in water immediately above bare sediments, suggesting that benthic Nostoc colonies contribute cyanotoxins to lake water and that MCs vary at very fine, 1–2 m spatial scales. Benthic cyanobacteria may be important in releasing MCs into aquatic ecosystems, especially in systems where benthic producers dominate, such as polar environments. |
author2 |
Division of Integrative Organismal Systems Division of Graduate Education Division of Polar Programs |
format |
Article in Journal/Newspaper |
author |
Trout‐Haney, Jessica V. Ritger, Amelia L. Cottingham, Kathryn L. |
spellingShingle |
Trout‐Haney, Jessica V. Ritger, Amelia L. Cottingham, Kathryn L. Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
author_facet |
Trout‐Haney, Jessica V. Ritger, Amelia L. Cottingham, Kathryn L. |
author_sort |
Trout‐Haney, Jessica V. |
title |
Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
title_short |
Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
title_full |
Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
title_fullStr |
Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
title_full_unstemmed |
Benthic cyanobacteria of the genus Nostoc are a source of microcystins in Greenlandic lakes and ponds |
title_sort |
benthic cyanobacteria of the genus nostoc are a source of microcystins in greenlandic lakes and ponds |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13636 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/fwb.13636 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Greenland Kangerlussuaq |
geographic_facet |
Arctic Greenland Kangerlussuaq |
genre |
Arctic Greenland greenlandic Kangerlussuaq |
genre_facet |
Arctic Greenland greenlandic Kangerlussuaq |
op_source |
Freshwater Biology volume 66, issue 2, page 266-277 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fwb.13636 |
container_title |
Freshwater Biology |
container_volume |
66 |
container_issue |
2 |
container_start_page |
266 |
op_container_end_page |
277 |
_version_ |
1800747182493532160 |