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Erik Jeppesen

Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions

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Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions. / Kristensen, Peter Brinkmann; Riis, Tenna; Dylmer, Hans Erik; Kristensen, E. A.; Meerhoff, Mariana; Olesen, B.; Teixeira-de Mello, F.; Baattrup-Pedersen, A.; Cavalli, Giulia; Jeppesen, E.

In: Freshwater Science, Vol. 35, No. 3, 2016, p. 909-921.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Kristensen, PB, Riis, T, Dylmer, HE, Kristensen, EA, Meerhoff, M, Olesen, B, Teixeira-de Mello, F, Baattrup-Pedersen, A, Cavalli, G & Jeppesen, E 2016, 'Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions', Freshwater Science, vol. 35, no. 3, pp. 909-921. https://doi.org/10.1086/687284

APA

Kristensen, P. B., Riis, T., Dylmer, H. E., Kristensen, E. A., Meerhoff, M., Olesen, B., Teixeira-de Mello, F., Baattrup-Pedersen, A., Cavalli, G., & Jeppesen, E. (2016). Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions. Freshwater Science, 35(3), 909-921. https://doi.org/10.1086/687284

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MLA

Vancouver

Author

Kristensen, Peter Brinkmann ; Riis, Tenna ; Dylmer, Hans Erik ; Kristensen, E. A. ; Meerhoff, Mariana ; Olesen, B. ; Teixeira-de Mello, F. ; Baattrup-Pedersen, A. ; Cavalli, Giulia ; Jeppesen, E. / Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions. In: Freshwater Science. 2016 ; Vol. 35, No. 3. pp. 909-921.

Bibtex

@article{bae2512cc4a744798c93c69059673eaf,
title = "Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions",
abstract = "Relationships between land use and stream consumer δ15N values are well established and, as a consequence, different primary consumers have been suggested as suitable system-specific baseline indicators in isotope studies of trophic structure. These baselines are often based on bulked data including several taxonomic groups and feeding types due to difficulties of finding ubiquitous taxonomic groups. We identified taxonomic groups which correlated well with land use in Danish lowland streams, and several of those are widely distributed in running waters in the Northern hemisphere. Particularly Baetidae, Simuliidae and Gammarus pulex appeared to be good indicators of land use. Scrapers (Baetidae), however, generally had higher δ15N than filtrators (Simuliidae) in catchments with a high level of anthropogenic activities, but lower δ15N in nature-dominated catchments. The trophic position of two common fish species (three-spined stickleback, Gasterosteus aculeatus, and brown trout Salmo trutta) differed markedly depending on the baseline chosen. The estimated trophic position was lowest when based on Baetidae and highest when using Simuliidae. The trophic position of Gasterosteus aculeatus was independent of land use (proxy used=%nature) when based on Gammarus pulex and Simuliidae, and the trophic position of Salmo trutta was independent of land use when based on Simuliidae only. The trophic position estimates based on Baetidae and mean primary consumers correlated with %nature in the catchment and had a slope deviating from zero for both fish species, despite gut content analysis revealed no such trophic level dependency of land use. This suggests that Baetidae are not good baseline indicators of trophic position, perhaps because their main food item (periphyton) may include nitrogen-fixing cyanobacteria, being potentially more important in less anthropogenic affected streams, resulting in lower scraper (e.g. Baetidae) δ15N values at such sites. We also found that within-site variation in δ15N was highest for Gammarus pulex, then Baetidae and the lowest for Simuliidae. Filtrators (e.g. Simuliidae) are thus apparently the best indicator of land uses, not least when the gradient of land use is large. Our results strongly support the use of these organisms as baseline in stable isotope studies of trophic webs.",
keywords = "foodweb analyses, stream ecosystems, isotope baseline, isotope methods, trophic relations, FOOD WEBS, FRESH-WATER, NITROGEN ISOTOPES, MIXING MODELS, STREAMS, FISH, RATIOS, CARBON, FRACTIONATION, INDICATORS",
author = "Kristensen, {Peter Brinkmann} and Tenna Riis and Dylmer, {Hans Erik} and Kristensen, {E. A.} and Mariana Meerhoff and B. Olesen and {Teixeira-de Mello}, F. and A. Baattrup-Pedersen and Giulia Cavalli and E. Jeppesen",
year = "2016",
doi = "10.1086/687284",
language = "English",
volume = "35",
pages = "909--921",
journal = "North American Benthological Society. Journal",
issn = "0887-3593",
publisher = "University of Chicago Press",
number = "3",

}

RIS

TY - JOUR

T1 - Baseline identification in stable -isotope studies of temperate lotic systems and implications for calculated trophic positions

AU - Kristensen, Peter Brinkmann

AU - Riis, Tenna

AU - Dylmer, Hans Erik

AU - Kristensen, E. A.

AU - Meerhoff, Mariana

AU - Olesen, B.

AU - Teixeira-de Mello, F.

AU - Baattrup-Pedersen, A.

AU - Cavalli, Giulia

AU - Jeppesen, E.

PY - 2016

Y1 - 2016

N2 - Relationships between land use and stream consumer δ15N values are well established and, as a consequence, different primary consumers have been suggested as suitable system-specific baseline indicators in isotope studies of trophic structure. These baselines are often based on bulked data including several taxonomic groups and feeding types due to difficulties of finding ubiquitous taxonomic groups. We identified taxonomic groups which correlated well with land use in Danish lowland streams, and several of those are widely distributed in running waters in the Northern hemisphere. Particularly Baetidae, Simuliidae and Gammarus pulex appeared to be good indicators of land use. Scrapers (Baetidae), however, generally had higher δ15N than filtrators (Simuliidae) in catchments with a high level of anthropogenic activities, but lower δ15N in nature-dominated catchments. The trophic position of two common fish species (three-spined stickleback, Gasterosteus aculeatus, and brown trout Salmo trutta) differed markedly depending on the baseline chosen. The estimated trophic position was lowest when based on Baetidae and highest when using Simuliidae. The trophic position of Gasterosteus aculeatus was independent of land use (proxy used=%nature) when based on Gammarus pulex and Simuliidae, and the trophic position of Salmo trutta was independent of land use when based on Simuliidae only. The trophic position estimates based on Baetidae and mean primary consumers correlated with %nature in the catchment and had a slope deviating from zero for both fish species, despite gut content analysis revealed no such trophic level dependency of land use. This suggests that Baetidae are not good baseline indicators of trophic position, perhaps because their main food item (periphyton) may include nitrogen-fixing cyanobacteria, being potentially more important in less anthropogenic affected streams, resulting in lower scraper (e.g. Baetidae) δ15N values at such sites. We also found that within-site variation in δ15N was highest for Gammarus pulex, then Baetidae and the lowest for Simuliidae. Filtrators (e.g. Simuliidae) are thus apparently the best indicator of land uses, not least when the gradient of land use is large. Our results strongly support the use of these organisms as baseline in stable isotope studies of trophic webs.

AB - Relationships between land use and stream consumer δ15N values are well established and, as a consequence, different primary consumers have been suggested as suitable system-specific baseline indicators in isotope studies of trophic structure. These baselines are often based on bulked data including several taxonomic groups and feeding types due to difficulties of finding ubiquitous taxonomic groups. We identified taxonomic groups which correlated well with land use in Danish lowland streams, and several of those are widely distributed in running waters in the Northern hemisphere. Particularly Baetidae, Simuliidae and Gammarus pulex appeared to be good indicators of land use. Scrapers (Baetidae), however, generally had higher δ15N than filtrators (Simuliidae) in catchments with a high level of anthropogenic activities, but lower δ15N in nature-dominated catchments. The trophic position of two common fish species (three-spined stickleback, Gasterosteus aculeatus, and brown trout Salmo trutta) differed markedly depending on the baseline chosen. The estimated trophic position was lowest when based on Baetidae and highest when using Simuliidae. The trophic position of Gasterosteus aculeatus was independent of land use (proxy used=%nature) when based on Gammarus pulex and Simuliidae, and the trophic position of Salmo trutta was independent of land use when based on Simuliidae only. The trophic position estimates based on Baetidae and mean primary consumers correlated with %nature in the catchment and had a slope deviating from zero for both fish species, despite gut content analysis revealed no such trophic level dependency of land use. This suggests that Baetidae are not good baseline indicators of trophic position, perhaps because their main food item (periphyton) may include nitrogen-fixing cyanobacteria, being potentially more important in less anthropogenic affected streams, resulting in lower scraper (e.g. Baetidae) δ15N values at such sites. We also found that within-site variation in δ15N was highest for Gammarus pulex, then Baetidae and the lowest for Simuliidae. Filtrators (e.g. Simuliidae) are thus apparently the best indicator of land uses, not least when the gradient of land use is large. Our results strongly support the use of these organisms as baseline in stable isotope studies of trophic webs.

KW - foodweb analyses

KW - stream ecosystems

KW - isotope baseline

KW - isotope methods

KW - trophic relations

KW - FOOD WEBS

KW - FRESH-WATER

KW - NITROGEN ISOTOPES

KW - MIXING MODELS

KW - STREAMS

KW - FISH

KW - RATIOS

KW - CARBON

KW - FRACTIONATION

KW - INDICATORS

U2 - 10.1086/687284

DO - 10.1086/687284

M3 - Journal article

VL - 35

SP - 909

EP - 921

JO - North American Benthological Society. Journal

JF - North American Benthological Society. Journal

SN - 0887-3593

IS - 3

ER -