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Nitrogen partitioning and transport through a subalpine lake measured with an isotope tracer.

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Title: Nitrogen partitioning and transport through a subalpine lake measured with an isotope tracer.
Authors: Epstein, David M., Wurtsbaugh, Wayne A., Baker, Michelle A.
Source: Limnology & Oceanography. 2012, Vol. 57 Issue 5, p1503-1516. 14p.
Subjects: Stable isotope tracers, Lakes, Nitrogen, Biotic communities, Epiphytes
Abstract: We used a stable isotope tracer to measure nitrogen (N) assimilation and transfer through Bull Trout Lake, a 0.3-km² mountain lake in Idaho, specifically to explore the relative importance of pelagic and benthic producers. was added into the inflow stream above the lake during spring runoff and the resulting mass of tracer was measured within the various ecosystem compartments, including the outflow stream. Although a portion of the moved through the lake quickly due to a low hydraulic residence time during the addition, the tracer was also assimilated rapidly by seston in the water column and at a slower rate by benthic primary producers. By the end of the 10-d injection, 10% of the tracer had left via outflow, 21% was within seston, and 17% was in epiphytes and macrophytes. However, 70 d after the termination of the injection, only ~ 1% of the tracer remained within seston, whereas 10% was within the benthic primary production compartment as N was recycled within the benthic zone. Quantitative transfer of 15N to invertebrate and fish consumers was low, but turnover in these compartments was slow. A conservative water mass tracer (bromide) indicated that the turnover rate for lake water was 1.8% d-1, whereas 15N turnover for the whole lake was only 0.7% d-1, demonstrating how lakes exert drag on nutrients as they move through the watershed. Due to uptake and storage of nutrients, Bull Trout Lake strongly influenced the timing and magnitude of nutrient export from its watershed. [ABSTRACT FROM AUTHOR]
Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 88949109
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Nitrogen partitioning and transport through a subalpine lake measured with an isotope tracer.
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  Data: <searchLink fieldCode="AR" term="%22Epstein%2C+David+M%2E%22">Epstein, David M.</searchLink><br /><searchLink fieldCode="AR" term="%22Wurtsbaugh%2C+Wayne+A%2E%22">Wurtsbaugh, Wayne A.</searchLink><br /><searchLink fieldCode="AR" term="%22Baker%2C+Michelle+A%2E%22">Baker, Michelle A.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Limnology+%26+Oceanography%22">Limnology & Oceanography</searchLink>. 2012, Vol. 57 Issue 5, p1503-1516. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Stable+isotope+tracers%22">Stable isotope tracers</searchLink><br /><searchLink fieldCode="DE" term="%22Lakes%22">Lakes</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen%22">Nitrogen</searchLink><br /><searchLink fieldCode="DE" term="%22Biotic+communities%22">Biotic communities</searchLink><br /><searchLink fieldCode="DE" term="%22Epiphytes%22">Epiphytes</searchLink>
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  Label: Abstract
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  Data: We used a stable isotope tracer to measure nitrogen (N) assimilation and transfer through Bull Trout Lake, a 0.3-km² mountain lake in Idaho, specifically to explore the relative importance of pelagic and benthic producers. was added into the inflow stream above the lake during spring runoff and the resulting mass of tracer was measured within the various ecosystem compartments, including the outflow stream. Although a portion of the moved through the lake quickly due to a low hydraulic residence time during the addition, the tracer was also assimilated rapidly by seston in the water column and at a slower rate by benthic primary producers. By the end of the 10-d injection, 10% of the tracer had left via outflow, 21% was within seston, and 17% was in epiphytes and macrophytes. However, 70 d after the termination of the injection, only ~ 1% of the tracer remained within seston, whereas 10% was within the benthic primary production compartment as N was recycled within the benthic zone. Quantitative transfer of 15N to invertebrate and fish consumers was low, but turnover in these compartments was slow. A conservative water mass tracer (bromide) indicated that the turnover rate for lake water was 1.8% d-1, whereas 15N turnover for the whole lake was only 0.7% d-1, demonstrating how lakes exert drag on nutrients as they move through the watershed. Due to uptake and storage of nutrients, Bull Trout Lake strongly influenced the timing and magnitude of nutrient export from its watershed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.4319/lo.2012.57.5.1503
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 14
        StartPage: 1503
    Subjects:
      – SubjectFull: Stable isotope tracers
        Type: general
      – SubjectFull: Lakes
        Type: general
      – SubjectFull: Nitrogen
        Type: general
      – SubjectFull: Biotic communities
        Type: general
      – SubjectFull: Epiphytes
        Type: general
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      – TitleFull: Nitrogen partitioning and transport through a subalpine lake measured with an isotope tracer.
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            NameFull: Epstein, David M.
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            NameFull: Wurtsbaugh, Wayne A.
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            NameFull: Baker, Michelle A.
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              M: 09
              Text: 2012
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              Y: 2012
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              Value: 57
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            – TitleFull: Limnology & Oceanography
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