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Changing nutrient cycling in Lake Baikal, the world’s oldest lake
Lake Baikal, lying in a rift zone in southeastern Siberia, is the world's oldest, deepest, and most voluminous lake that began to form over 30 million years ago. Cited as the “most outstanding example of a freshwater ecosystem” and designated a World Heritage Site in 1996 due to its high level...
Autores principales: | , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7959572/ https://www.ncbi.nlm.nih.gov/pubmed/33077588 http://dx.doi.org/10.1073/pnas.2013181117 |
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author | Swann, George E. A. Panizzo, Virginia N. Piccolroaz, Sebastiano Pashley, Vanessa Horstwood, Matthew S. A. Roberts, Sarah Vologina, Elena Piotrowska, Natalia Sturm, Michael Zhdanov, Andre Granin, Nikolay Norman, Charlotte McGowan, Suzanne Mackay, Anson W. |
author_facet | Swann, George E. A. Panizzo, Virginia N. Piccolroaz, Sebastiano Pashley, Vanessa Horstwood, Matthew S. A. Roberts, Sarah Vologina, Elena Piotrowska, Natalia Sturm, Michael Zhdanov, Andre Granin, Nikolay Norman, Charlotte McGowan, Suzanne Mackay, Anson W. |
author_sort | Swann, George E. A. |
collection | PubMed |
description | Lake Baikal, lying in a rift zone in southeastern Siberia, is the world's oldest, deepest, and most voluminous lake that began to form over 30 million years ago. Cited as the “most outstanding example of a freshwater ecosystem” and designated a World Heritage Site in 1996 due to its high level of endemicity, the lake and its ecosystem have become increasingly threatened by both climate change and anthropogenic disturbance. Here, we present a record of nutrient cycling in the lake, derived from the silicon isotope composition of diatoms, which dominate aquatic primary productivity. Using historical records from the region, we assess the extent to which natural and anthropogenic factors have altered biogeochemical cycling in the lake over the last 2,000 y. We show that rates of nutrient supply from deep waters to the photic zone have dramatically increased since the mid-19th century in response to changing wind dynamics, reduced ice cover, and their associated impact on limnological processes in the lake. With stressors linked to untreated sewage and catchment development also now impacting the near-shore region of Lake Baikal, the resilience of the lake’s highly endemic ecosystem to ongoing and future disturbance is increasingly uncertain. |
format | Online Article Text |
id | pubmed-7959572 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-79595722021-03-22 Changing nutrient cycling in Lake Baikal, the world’s oldest lake Swann, George E. A. Panizzo, Virginia N. Piccolroaz, Sebastiano Pashley, Vanessa Horstwood, Matthew S. A. Roberts, Sarah Vologina, Elena Piotrowska, Natalia Sturm, Michael Zhdanov, Andre Granin, Nikolay Norman, Charlotte McGowan, Suzanne Mackay, Anson W. Proc Natl Acad Sci U S A Physical Sciences Lake Baikal, lying in a rift zone in southeastern Siberia, is the world's oldest, deepest, and most voluminous lake that began to form over 30 million years ago. Cited as the “most outstanding example of a freshwater ecosystem” and designated a World Heritage Site in 1996 due to its high level of endemicity, the lake and its ecosystem have become increasingly threatened by both climate change and anthropogenic disturbance. Here, we present a record of nutrient cycling in the lake, derived from the silicon isotope composition of diatoms, which dominate aquatic primary productivity. Using historical records from the region, we assess the extent to which natural and anthropogenic factors have altered biogeochemical cycling in the lake over the last 2,000 y. We show that rates of nutrient supply from deep waters to the photic zone have dramatically increased since the mid-19th century in response to changing wind dynamics, reduced ice cover, and their associated impact on limnological processes in the lake. With stressors linked to untreated sewage and catchment development also now impacting the near-shore region of Lake Baikal, the resilience of the lake’s highly endemic ecosystem to ongoing and future disturbance is increasingly uncertain. National Academy of Sciences 2020-11-03 2020-10-19 /pmc/articles/PMC7959572/ /pubmed/33077588 http://dx.doi.org/10.1073/pnas.2013181117 Text en Copyright © 2020 the Author(s). Published by PNAS. http://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (http://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Physical Sciences Swann, George E. A. Panizzo, Virginia N. Piccolroaz, Sebastiano Pashley, Vanessa Horstwood, Matthew S. A. Roberts, Sarah Vologina, Elena Piotrowska, Natalia Sturm, Michael Zhdanov, Andre Granin, Nikolay Norman, Charlotte McGowan, Suzanne Mackay, Anson W. Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title | Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title_full | Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title_fullStr | Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title_full_unstemmed | Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title_short | Changing nutrient cycling in Lake Baikal, the world’s oldest lake |
title_sort | changing nutrient cycling in lake baikal, the world’s oldest lake |
topic | Physical Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7959572/ https://www.ncbi.nlm.nih.gov/pubmed/33077588 http://dx.doi.org/10.1073/pnas.2013181117 |
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