Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions
In nitrogen-poor streams or under nitrogen-limiting conditions, algae and cyanobacteria that fix atmospheric nitrogen can have a competitive advantage over other taxa. As an energetically costly process, however, N2-fixation rates can be constrained by light availability and temperature levels. Envi...
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ftstcatherineuni:oai:sophia.stkate.edu:bio_fac-1044 2023-05-15T16:50:39+02:00 Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions Furey, Paula Welter, Jill 2021-05-23T07:00:00Z https://sophia.stkate.edu/bio_fac/44 https://works.bepress.com/paula-furey/52/download/ unknown SOPHIA https://sophia.stkate.edu/bio_fac/44 https://works.bepress.com/paula-furey/52/download/ Biology Faculty Scholarship aquatic ecosystems climate change eutrophication algae diatoms Biology Terrestrial and Aquatic Ecology text 2021 ftstcatherineuni 2022-04-16T22:36:51Z In nitrogen-poor streams or under nitrogen-limiting conditions, algae and cyanobacteria that fix atmospheric nitrogen can have a competitive advantage over other taxa. As an energetically costly process, however, N2-fixation rates can be constrained by light availability and temperature levels. Environmental preferences of different N2-fixing species can further shape distribution patterns over time and space. The abundance and species composition of N2-fixing taxa, and their rates of N2-fixation can determine how, where, and under what conditions nitrogen enters the ecosystem and where it goes from there. From nitrogen-poor streams in Iceland and California, we compared N2-fixation rates for cyanobacteria (e.g., Anabaena, several Nostoc species, Rivularia) and Epithemia spp. (diatoms with cyanobacteria endosymbionts) under different light and temperature conditions. N2-fixation rates varied by genus and species, though light and temperature preferences complicated taxon-specific comparisons. N2-fixation rates generally increased with temperature but varied by taxon. Results highlighted areas needing further research. Knowledge of taxon-specific N2-fixation rates under varied environmental conditions will strengthen our ability to scale up predictions of nitrogen cycling and to predict biofilm response to our warming, nutrient-rich world. Text Iceland St. Catherine University: SOPHIA |
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St. Catherine University: SOPHIA |
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ftstcatherineuni |
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topic |
aquatic ecosystems climate change eutrophication algae diatoms Biology Terrestrial and Aquatic Ecology |
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aquatic ecosystems climate change eutrophication algae diatoms Biology Terrestrial and Aquatic Ecology Furey, Paula Welter, Jill Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
topic_facet |
aquatic ecosystems climate change eutrophication algae diatoms Biology Terrestrial and Aquatic Ecology |
description |
In nitrogen-poor streams or under nitrogen-limiting conditions, algae and cyanobacteria that fix atmospheric nitrogen can have a competitive advantage over other taxa. As an energetically costly process, however, N2-fixation rates can be constrained by light availability and temperature levels. Environmental preferences of different N2-fixing species can further shape distribution patterns over time and space. The abundance and species composition of N2-fixing taxa, and their rates of N2-fixation can determine how, where, and under what conditions nitrogen enters the ecosystem and where it goes from there. From nitrogen-poor streams in Iceland and California, we compared N2-fixation rates for cyanobacteria (e.g., Anabaena, several Nostoc species, Rivularia) and Epithemia spp. (diatoms with cyanobacteria endosymbionts) under different light and temperature conditions. N2-fixation rates varied by genus and species, though light and temperature preferences complicated taxon-specific comparisons. N2-fixation rates generally increased with temperature but varied by taxon. Results highlighted areas needing further research. Knowledge of taxon-specific N2-fixation rates under varied environmental conditions will strengthen our ability to scale up predictions of nitrogen cycling and to predict biofilm response to our warming, nutrient-rich world. |
format |
Text |
author |
Furey, Paula Welter, Jill |
author_facet |
Furey, Paula Welter, Jill |
author_sort |
Furey, Paula |
title |
Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
title_short |
Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
title_full |
Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
title_fullStr |
Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
title_full_unstemmed |
Are all N2-fixing taxa equal?- Taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
title_sort |
are all n2-fixing taxa equal?- taxon-specific nitrogen-fixation rates of benthic cyanobacteria and diatoms under different environmental conditions |
publisher |
SOPHIA |
publishDate |
2021 |
url |
https://sophia.stkate.edu/bio_fac/44 https://works.bepress.com/paula-furey/52/download/ |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Biology Faculty Scholarship |
op_relation |
https://sophia.stkate.edu/bio_fac/44 https://works.bepress.com/paula-furey/52/download/ |
_version_ |
1766040769245741056 |