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Whole-lake carbon-13 additions reveal terrestrial support of aquatic food webs

Overview of attention for article published in Nature, January 2004
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About this Attention Score

  • Good Attention Score compared to outputs of the same age (73rd percentile)
  • Average Attention Score compared to outputs of the same age and source

Mentioned by

1 Wikipedia page
1 research highlight platform


343 Dimensions

Readers on

538 Mendeley
3 CiteULike
Whole-lake carbon-13 additions reveal terrestrial support of aquatic food webs
Published in
Nature, January 2004
DOI 10.1038/nature02227
Pubmed ID

Michael L. Pace, Jonathan J. Cole, Stephen R. Carpenter, James F. Kitchell, James R. Hodgson, Matthew C. Van de Bogert, Darren L. Bade, Emma S. Kritzberg, David Bastviken


Ecosystems are supported by organic carbon from two distinct sources. Endogenous carbon is produced by photosynthesis within an ecosystem by autotrophic organisms. Exogenous carbon is produced elsewhere and transported into ecosystems. Consumers may use exogenous carbon with consequent influences on population dynamics, predator-prey relationships and ecosystem processes. For example, exogenous inputs provide resources that may enhance consumer abundance beyond levels supported by within-system primary production. Exogenous fluxes of organic carbon to ecosystems are often large, but this material is recalcitrant and difficult to assimilate, in contrast to endogenously produced organic matter, which is used more easily. Here we show, by the experimental manipulation of dissolved inorganic (13)C in two lakes, that internal primary production is insufficient to support the food webs of these ecosystems. Additions of NaH(13)CO(3) enriched the (13)C content of dissolved inorganic carbon, particulate organic carbon, zooplankton and fish. Dynamics of (13)C indicate that 40-55% of particulate organic carbon and 22-50% of zooplankton carbon are derived from terrestrial sources, showing that there is significant subsidy of these ecosystems by organic carbon produced outside their boundaries.

Mendeley readers

The data shown below were compiled from readership statistics for 538 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 26 5%
Argentina 6 1%
Brazil 5 <1%
Canada 4 <1%
Germany 3 <1%
Spain 2 <1%
Malaysia 2 <1%
Australia 2 <1%
France 2 <1%
Other 12 2%
Unknown 474 88%

Demographic breakdown

Readers by professional status Count As %
Researcher 139 26%
Student > Ph. D. Student 121 22%
Student > Master 76 14%
Professor > Associate Professor 44 8%
Professor 36 7%
Other 122 23%
Readers by discipline Count As %
Agricultural and Biological Sciences 252 47%
Environmental Science 155 29%
Unspecified 55 10%
Earth and Planetary Sciences 48 9%
Engineering 7 1%
Other 21 4%

Attention Score in Context

This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 May 2017.
All research outputs
of 12,344,387 outputs
Outputs from Nature
of 64,033 outputs
Outputs of similar age
of 11,736,940 outputs
Outputs of similar age from Nature
of 63,511 outputs
Altmetric has tracked 12,344,387 research outputs across all sources so far. This one has received more attention than most of these and is in the 74th percentile.
So far Altmetric has tracked 64,033 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 72.5. This one is in the 31st percentile – i.e., 31% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 11,736,940 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 73% of its contemporaries.
We're also able to compare this research output to 63,511 others from the same source and published within six weeks on either side of this one. This one is in the 31st percentile – i.e., 31% of its contemporaries scored the same or lower than it.