Macroinvertebrate 13C variability analysis for the assessment of lake trophic functioning

Borderelle, Anne-Laure; Gilmette, C.; Lovy, Christiane; Gerdeau×, Daniel; Verneaux, Valérie

doi:10.1127/1863-9135/2008/0172-0289

Cited by 8 publications

(14 citation statements)

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“…Following the Δδ 13 C interpretation proposed by Borderelle et al . (), the low depth‐related chironomid HC 13 C depletion observed in S1 can be interpreted as a sign of a high functional efficiency.…”

Section: Discussionsupporting

confidence: 54%

“…Borderelle et al . () suggested that the differences in δ 13 C values of macroinvertebrates between the littoral and deep zones (Δδ 13 C litt‐deep ) could be used to quantify the extent of heterotrophic processes within a lake system. In this case, lacustrine systems that tend to exhibit a high functional efficiency should be characterised by low Δδ 13 C litt‐deep values and vice versa .…”

Section: Introductionmentioning

confidence: 73%

“…DIC resp and biogenic CH 4 ) are expected to be minimised, as are the Δδ 13 C values of benthic invertebrates (Chironomidae in this study) between littoral and deep zones, in accordance with Borderelle et al . (). The Δδ 13 C values of benthic invertebrates hence appear to serve as a metric of functional efficiency and can vary over time, in relation to the extent of ecosystem stress according to Odum ().…”

Section: Introductionmentioning

confidence: 99%

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Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains

et al. 2013

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Summary Long‐term trends, spanning about 150 years, in δ13C values in the head capsules (HCs) of three chironomid taxa and pelagic cladoceran exoskeletons are reported for a reoligotrophicated, deep, clear‐water lake using a multidepth approach. The trends were taxon specific, and Bayesian change point analyses defined three homogenous temporal sequences of HC δ13C. From the 1850s to the 1930s, the δ13C values were stable and similar in the littoral and deep zones, suggesting that littoral and deep chironomids relied on similar carbon sources; the HCs and cladoceran δ13C values were approximately −32‰, providing no evidence of organic carbon reworking via microbial mineralisation. From the 1930s to the 1950s, the littoral HC and cladoceran δ13C values decreased by 2‰. This decrease was probably related to an increase in respiration processes in the epilimnion following an increase in trophic state of the lake. The deep HC δ13C values remained stable during this period, suggesting that most of the additional primary production due to eutrophication was transferred to higher trophic levels. From the 1950s onward, the littoral HC and cladoceran δ13C values remained steady, whereas the deep HC values decreased substantially (−4‰), despite the restoration of oligotrophic conditions in open water. This pattern suggests the existence of organic carbon accumulation and microbial mineralisation at the lake bottom as well as a possible increase in methane‐derived carbon consumption by chironomids. These processes were attributed to a lower trophic efficiency within the pelagic food web, decreasing the functional efficiency of the lake. Our results suggest that the functioning of the lake was characterised by low heterotrophic activities prior to the 1930s and that since the 1990s, the increase in heterotrophic activities has been supported by autochthonous organic carbon recycling.

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains

et al. 2013

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“…of individual larvae in a range of environments and in different ecosystem types (see, e.g., Grey et al 2004a, b;Borderelle et al 2008;Jones et al 2008). These measurements are usually based on samples taken from the larval body.…”

Section: Methodsmentioning

confidence: 99%

Stable isotopic analysis of fossil chironomids as an approach to environmental reconstruction: state of development and future challenges

2012

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. 2012. Stable isotopic analysis of fossil chironomids as an approach to environmental reconstruction: state of development and future challenges. Fauna norvegica 31: 7-18.Remains of chironomid larvae, especially their strongly sclerotized head capsules, can be found abundantly and well preserved in most lake sediment records. These remains mainly consist of chitin and proteins and, since their chemical composition does not seem to be strongly affected by decompositional processes, they can be used to develop palaeoenvironmental reconstructions based on their stable isotopic composition. Here we review available stable isotope studies based on fossil chironomids and indicate future research necessary to further develop this still relatively new research approach. Efforts to produce stable isotope records based on fossil chironomids have mainly examined the elements H, N, C, and O. They have focussed on (1) developing the methodology for preparing samples for isotopic analysis, (2) laboratory studies cultivating chironomid larvae under controlled conditions to determine the factors affecting their stable isotopic composition, (3) ecosystem-scale studies relating stable isotopic measurements of fossil chironomid assemblages to environmental conditions, and (4) developing first down-core records describing past changes in the stable isotopic composition of chironomid assemblages. These studies have shown that chemical sample pretreatment may affect the isotopic composition for some elements. Laboratory runs suggest that the diet of the larvae influences their stable isotopic composition for H, N, C and O, whereas stable isotopes in the ambient water also strongly influence their oxygen and to a lesser extent hydrogen isotopic composition. These experiments also indicate only minor offsets between the nitrogen and carbon isotopic composition of chironomid soft tissue and the fossilizing head capsules, whereas for hydrogen and oxygen this offset remains to be explored. Though few datasets have been published, the available ecosystem studies and developed down-core sediment records indicate that stable isotopes in chironomid remains have the potential to provide reconstructions of past climatic change (H, O) and insights into past food web structure, methane production and pollution of lake ecosystems (N, C). Future efforts will be necessary to develop these approaches including more detailed analyses of the effects of sample pretreatment on stable isotope measurements on chitinous fossils, more extensive laboratory studies constraining the effects of external factors (e.g., isotopic composition of food and ambient water, temperature) on stable isotopes in chironomid larvae, and surveys exploring seasonal changes in the isotopic composition of chironomid larvae and assessing how this seasonality influences fossil assemblages. Finally, multi-site field studies relating chironomid δD, δ 15 N, δ 13 C and δ 18 O to parameters such as δ 18 O of precipitation, air and water temperatures, and nutrient and greenhouse gas conc...

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“…The same authors have also demonstrated that in small lakes, much more influenced by allochtonous organic matter inputs than great lakes, no correlation appeared between whitefish δ 13 C values and the lake trophic levels because respired DIC from allochthonous organic matter mineralization could supply the increase of carbon request instead of atmospheric carbon dissolution. In the present study, all lakes are small size lakes in which it has been shown that consumers, namely macroinvertebrates, have δ 13 C values largely influenced by organic matter recycling activity (Borderelle et al, 2008). In these lakes no correlation appeared between consumer δ 13 C values and anthropogenic activity because the organic matter that sustain the microbial activity could be allochthonous or autochtonous or both with different proportions between lakes.…”

Section: Watershed Scalementioning

confidence: 48%

Influence of watershed’s anthropogenic activities on fish nitrogen and carbon stable isotope ratios in nine French lakes

Borderelle

Gerdeau×²,

Giraudoux

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

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The relationships between fish community δ 15 N and δ 13 C values and land use in watersheds and in buffer zones of nine French lakes were studied. The results showed inter-lakes variability of mean δ 15 N and δ 13 C values for different fish species. The study of correlations between fish δ 15 N and δ 13 C values and the proportions from different land use categories in watersheds showed a land use effect on fish δ 15 N values but not on δ 13 C values. The results underlined the great impact of manure spreading on grasslands as a nitrate source in our lakes. Nevertheless, the best correlations between fish δ 15 N values and land use were obtained when the entire fish community (i.e. the whole fish community mean δ 15 N values in each lake) and all anthropogenic activities (residential lands, camp sites and grasslands for our systems) were considered in either watersheds or in buffer zones. Thus, for our sites, the fish δ 15 N values are useful to evaluate nitrogen inputs from human and animal wastes at the watershedscale as well as at the buffer zone-scale. The absence of land use effect on the fish community δ 13 C values could be at least partly explained by the small size of these lakes in which it has been shown that consumers, namely macroinvertebrates, have δ 13 C values largely influenced by organic matter recycling activity. RÉSUMÉ Influence des activités humaines des bassins versants sur les ratios d'isotopes stables d'azote et de carbone des poissons dans neuf lacs françaisLes relations entre les valeurs de δ 15 N et δ 13 C des communautés pisciaires, l'occupation des bassins versants et des zones tampon de neuf lacs français ont été étudiées. Les résultats montrent une variablilité inter-lac des valeurs moyennes de δ 15 N et δ 13 C pour les différentes espèces. L'étude des relations entre les valeurs isotopiques des poissons et les proportions des différentes catégories d'usage des bassins versants montre une corrélation entre l'occupation des sols et les valeurs de δ 15 N des poissons alors qu'aucune corrélation n'apparaît si l'on considère les valeurs de δ 13 C. Les résultats obtenus mettent en évidence l'impact important

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Macroinvertebrate 13C variability analysis for the assessment of lake trophic functioning

Cited by 8 publications

References 0 publications

Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains

Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains

Stable isotopic analysis of fossil chironomids as an approach to environmental reconstruction: state of development and future challenges

Influence of watershed’s anthropogenic activities on fish nitrogen and carbon stable isotope ratios in nine French lakes

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Macroinvertebrate 13C variability analysis for the assessment of lake trophic functioning

Cited by 8 publications

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Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ13C) of chironomid and cladoceran subfossil remains

Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ13C) of chironomid and cladoceran subfossil remains

Stable isotopic analysis of fossil chironomids as an approach to environmental reconstruction: state of development and future challenges

Influence of watershed’s anthropogenic activities on fish nitrogen and carbon stable isotope ratios in nine French lakes

Contact Info

Product

Resources

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Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains

Reconstructing long‐term changes (150 years) in the carbon cycle of a clear‐water lake based on the stable carbon isotope composition (δ¹³C) of chironomid and cladoceran subfossil remains