Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient
Subarctic lakes are getting warmer and more productive due to the joint effects of climate change and intensive land-use practices (e.g. forest clear-cutting and peatland ditching), processes that potentially increase leaching of peat- and soil-stored mercury into lake ecosystems. We sampled biotic...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2021
|
Subjects: | |
Online Access: | http://urn.fi/URN:NBN:fi:jyu-202103302224 |
id |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/74892 |
---|---|
record_format |
openpolar |
spelling |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/74892 2024-05-19T07:49:10+00:00 Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient Kozak, Natalia Ahonen, Salla A. Keva, Ossi Østbye, Kjartan Taipale, Sami J. Hayden, Brian Kahilainen, Kimmo K. 2021 application/pdf fulltext http://urn.fi/URN:NBN:fi:jyu-202103302224 eng eng Elsevier Science of the Total Environment 0048-9697 779 10.1016/j.scitotenv.2021.146261 Kozak, N., Ahonen, S. A., Keva, O., Østbye, K., Taipale, S. J., Hayden, B., & Kahilainen, K. K. (2021). Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient. Science of the Total Environment , 779 , Article 146261. https://doi.org/10.1016/j.scitotenv.2021.146261 CONVID_51860791 URN:NBN:fi:jyu-202103302224 http://urn.fi/URN:NBN:fi:jyu-202103302224 CC BY 4.0 © 2021 The Authors. Published by Elsevier B.V. openAccess https://creativecommons.org/licenses/by/4.0/ climate change fish food chain length invertebrates land-use stable isotopes elohopea kasautuminen vesiekosysteemit kalat maankäyttö isotooppianalyysi ravintoketjut ympäristömyrkyt selkärangattomat ilmastonmuutokset article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 publishedVersion A1 2021 ftjyvaeskylaenun 2024-04-23T23:38:28Z Subarctic lakes are getting warmer and more productive due to the joint effects of climate change and intensive land-use practices (e.g. forest clear-cutting and peatland ditching), processes that potentially increase leaching of peat- and soil-stored mercury into lake ecosystems. We sampled biotic communities from primary producers (algae) to top consumers (piscivorous fish), in 19 subarctic lakes situated on a latitudinal (69.0–66.5° N), climatic (+3.2 °C temperature and + 30% precipitation from north to south) and catchment land-use (pristine to intensive forestry areas) gradient. We first tested how the joint effects of climate and productivity influence mercury biomagnification in food webs focusing on the trophic magnification slope (TMS) and mercury baseline (THg baseline) level, both derived from linear regression between total mercury (log10THg) and organism trophic level (TL). We examined a suite of environmental and biotic variables thought to explain THg baseline and TMS with stepwise generalized multiple regression models. Finally, we assessed how climate and lake productivity affect the THg content of top predators in subarctic lakes. We found biomagnification of mercury in all studied lakes, but with variable TMS and THg baseline values. In stepwise multiple regression models, TMS was best explained by negative relationships with food chain length, climate-productivity gradient, catchment properties, and elemental C:N ratio of the top predator (full model R2 = 0.90, p < 0.001). The model examining variation in THg baseline values included the same variables with positive relationships (R2 = 0.69, p = 0.014). Mass-standardized THg content of a common top predator (1 kg northern pike, Esox lucius) increased towards warmer and more productive lakes. These results indicate that increasing eutrophication via forestry-related land-use activities increase the THg levels at the base of the food web and in top predators, suggesting these sources of nutrients and mercury should be considered in future ... Article in Journal/Newspaper Subarctic JYX - Jyväskylä University Digital Archive |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
climate change fish food chain length invertebrates land-use stable isotopes elohopea kasautuminen vesiekosysteemit kalat maankäyttö isotooppianalyysi ravintoketjut ympäristömyrkyt selkärangattomat ilmastonmuutokset |
spellingShingle |
climate change fish food chain length invertebrates land-use stable isotopes elohopea kasautuminen vesiekosysteemit kalat maankäyttö isotooppianalyysi ravintoketjut ympäristömyrkyt selkärangattomat ilmastonmuutokset Kozak, Natalia Ahonen, Salla A. Keva, Ossi Østbye, Kjartan Taipale, Sami J. Hayden, Brian Kahilainen, Kimmo K. Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
topic_facet |
climate change fish food chain length invertebrates land-use stable isotopes elohopea kasautuminen vesiekosysteemit kalat maankäyttö isotooppianalyysi ravintoketjut ympäristömyrkyt selkärangattomat ilmastonmuutokset |
description |
Subarctic lakes are getting warmer and more productive due to the joint effects of climate change and intensive land-use practices (e.g. forest clear-cutting and peatland ditching), processes that potentially increase leaching of peat- and soil-stored mercury into lake ecosystems. We sampled biotic communities from primary producers (algae) to top consumers (piscivorous fish), in 19 subarctic lakes situated on a latitudinal (69.0–66.5° N), climatic (+3.2 °C temperature and + 30% precipitation from north to south) and catchment land-use (pristine to intensive forestry areas) gradient. We first tested how the joint effects of climate and productivity influence mercury biomagnification in food webs focusing on the trophic magnification slope (TMS) and mercury baseline (THg baseline) level, both derived from linear regression between total mercury (log10THg) and organism trophic level (TL). We examined a suite of environmental and biotic variables thought to explain THg baseline and TMS with stepwise generalized multiple regression models. Finally, we assessed how climate and lake productivity affect the THg content of top predators in subarctic lakes. We found biomagnification of mercury in all studied lakes, but with variable TMS and THg baseline values. In stepwise multiple regression models, TMS was best explained by negative relationships with food chain length, climate-productivity gradient, catchment properties, and elemental C:N ratio of the top predator (full model R2 = 0.90, p < 0.001). The model examining variation in THg baseline values included the same variables with positive relationships (R2 = 0.69, p = 0.014). Mass-standardized THg content of a common top predator (1 kg northern pike, Esox lucius) increased towards warmer and more productive lakes. These results indicate that increasing eutrophication via forestry-related land-use activities increase the THg levels at the base of the food web and in top predators, suggesting these sources of nutrients and mercury should be considered in future ... |
format |
Article in Journal/Newspaper |
author |
Kozak, Natalia Ahonen, Salla A. Keva, Ossi Østbye, Kjartan Taipale, Sami J. Hayden, Brian Kahilainen, Kimmo K. |
author_facet |
Kozak, Natalia Ahonen, Salla A. Keva, Ossi Østbye, Kjartan Taipale, Sami J. Hayden, Brian Kahilainen, Kimmo K. |
author_sort |
Kozak, Natalia |
title |
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
title_short |
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
title_full |
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
title_fullStr |
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
title_full_unstemmed |
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
title_sort |
environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://urn.fi/URN:NBN:fi:jyu-202103302224 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
Science of the Total Environment 0048-9697 779 10.1016/j.scitotenv.2021.146261 Kozak, N., Ahonen, S. A., Keva, O., Østbye, K., Taipale, S. J., Hayden, B., & Kahilainen, K. K. (2021). Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient. Science of the Total Environment , 779 , Article 146261. https://doi.org/10.1016/j.scitotenv.2021.146261 CONVID_51860791 URN:NBN:fi:jyu-202103302224 http://urn.fi/URN:NBN:fi:jyu-202103302224 |
op_rights |
CC BY 4.0 © 2021 The Authors. Published by Elsevier B.V. openAccess https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1799467622996115456 |