Contribution of methanotrophs to freshwater macroinvertebrates: evidence from stable isotope ratios

Kiyashko, S. I.; Narita, Toshio; Wada, Eitaro

doi:10.3354/ame024203

Cited by 74 publications

(68 citation statements)

References 21 publications

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“…Frossard et al (2014) also suggested that similar decreases of d 13 C values in two Chironomini taxa, Tanypodinae, and pelagic Cladocera in a sediment record Lake Annecy (France) were linked to increased availability of 13 C-depleted methane-derived organic carbon. Chironomid larvae feeding partly on MOB can be strongly 13 C-depleted, as shown for several species (Jones et al 2008;Kiyashko et al 2001;Zemskaya et al 2012).…”

Section: Trends In D 13 C Of Invertebrate Remainsmentioning

confidence: 99%

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

et al. 2014

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Taxon-specific stable carbon isotope (d 13 C) analysis of chitinous remains of invertebrates can provide valuable information about the carbon sources used by invertebrates living in specific habitats of lake ecosystems (for example, sediments, water column, or aquatic vegetation). This is complementary to d 13 C of sedimentary organic matter (SOM), which provides an integrated signal of organic matter produced in a lake and its catchment, and of diagenetic processes within sediments. In a sediment record from Strandsjön (Sweden) covering the past circa 140 years, we analyzed SOM geochemistry (d 13 C, C:N atomic , organic carbon content) and d 13 C of chitinous invertebrate remains in order to examine whether taxon-specific d 13 C records could be developed for different invertebrate groups and whether these analyses provide insights into past changes of organic carbon sources for lacustrine invertebrates available in benthic and planktonic compartments of the lake. Invertebrate taxa included benthic chironomids (Chironomus, Chironomini excluding Chironomus, Tanytarsini, and Tanypodinae), filter-feeders on suspended particulate organic matter (Daphnia, Plumatella and Cristatella mucedo), and Rhabdocoela. d 13 C of chironomid remains indicated periodic availability of 13 C-depleted carbon sources in the benthic environment of the lake as d 13 C values of the different chironomid taxa fluctuated simultaneously between -34.7 and -30.5 % (VPDB). Daphnia and Bryozoa showed parallel changes in their d 13 C values which did not coincide with variations in d 13 C of chironomids, though, and a 2-3 % decrease since circa AD 1960. The decrease in d 13 C of Daphnia and Bryozoa could indicate a decrease in phytoplankton d 13 C as a result of lower lake productivity, which is in accordance with historical information about the lake that suggests a shift to less eutrophic conditions after AD 1960. In contrast, Rhabdocoela cocoons were characterized by relatively high d 13 C values (-30.4 to -28.2 %) that did not show a strong temporal trend, which could be related to the predatory feeding mode and wide prey Author's personal copy spectrum of this organism group. The taxon-specific d 13 C analyses of invertebrate remains indicated that different carbon sources were available for the benthic chironomid larvae than for the filter-feeding Daphnia and bryozoans. Our results therefore demonstrate that taxon-specific analysis of d 13 C of organic invertebrate remains can provide complementary information to measurements on bulk SOM and that d 13 C of invertebrate remains may allow the reconstruction of past changes in carbon sources and their d 13 C in different habitats of lake ecosystems.

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Section: Trends In D 13 C Of Invertebrate Remainsmentioning

confidence: 99%

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

et al. 2014

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“…In systems with high respiration, ␦ 13 C values for dissolved inorganic carbon can approach Ϫ20‰ and via fractionation during photosynthesis could in principle result in phytoplankton of Ϫ45‰ (Peterson and Fry 1987), although this may be rare in practice (Jones et al 2001;Cole et al 2002). However, recent studies have revealed very depleted ␦ 13 C values in some lake systems, with chironomid species as low as Ϫ64‰ (Bunn and Boon 1993;Kiyashko et al 2001;Grey 2002;Jones and Grey in press). Bunn and Boon (1993) pos-tulated that this phenomenon was caused by incorporation of isotopically light biogenic methane produced in anoxic sediments.…”

Section: Nmentioning

confidence: 99%

High intraspecific variability in carbon and nitrogen stable isotope ratios of lake chironomid larvae

Grey

Kelly

Jones

2004

Limnology & Oceanography

105

112

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Stable isotope analyses of chironomid trophic interactions have recently indicated the potential importance of isotopically light biogenic methane as a carbon source. Mass balance of isotope ratios suggests that small proportional differences in ingestion of such an isotopically distinct basal resource by individual consumers can result in considerable intraspecific variability. To test this, we collected individual larvae of two closely related chironomid species (Chironomus anthracinus and Chironomus plumosus) from six lakes and analyzed their ␦ 13 C and ␦ 15N. Intraspecific variability in larval ␦ 13 C and ␦ 15 N values was greater in lakes where chironomids were more 13 C depleted. C. plumosus exhibited higher intraspecific variability relative to C. anthracinus. In two lakes, individual C. plumosus exhibited a range of 35‰ for ␦ 13 C and 16‰ for ␦ 15 N (equivalent to five trophic levels). There was a strong positive relationship between larval ␦ 13 C and ␦ 15 N, both between individuals from the same lake and also between lakes, suggesting that the underlying causative mechanisms are similar. Furthermore, larvae from deeper sites, which are more susceptible to prolonged anoxia, exhibited greater intraspecific variability, and larger larvae were significantly 13 C depleted. Such high intraspecific variability can confound the interpretation of benthic food web stable isotope values. We advocate the reporting of more intraspecific isotopic variability as a means to further examine niche breadth and feeding behavior.

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“…Much lower POM d 13 C (232%) was observed in May within the chemocline and benthic boundary layer (hypolimnion) because of chemosynthetic activity of sulfide oxidizers (Hadas et al 2000(Hadas et al , 2001. Light C isotopic composition is known to occur during assimilation by chemoautotrophic ammonia-, sulfide-, and methane-oxidizing bacteria (Cavanaugh et al 1981;Del Giorgio and France 1996;Kiyashko et al 2001) …”

Section: Hadas Unpubl) At This Time Nhmentioning

confidence: 99%

Seasonally varying nitrogen isotope biogeochemistry of particulate organic matter in Lake Kinneret, Israel

2009

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Large temporal variations in the nitrogen isotopic composition (d 15 N) of particulate organic matter (POM) and dissolved inorganic nitrogen (DIN) species in Lake Kinneret occurred in response to seasonal phasing of dominant nitrogen cycle processes. The lowest d 15 N POM values (25.5%) were observed in early winter, a consequence of isotopic fractionation by chemoautotrophic microbial NH Oligotrophic conditions are found in the epilimnion in late summer and early autumn and low (3.3%) d 15 N POM was found during the bloom of the filamentous N 2 -fixing cyanobacteria Aphanizomenon ovalisporum and Cylindrospermopsis cuspis. The d 15 N-dissolved organic nitrogen isotopic signature at this time was significantly higher, 8-12%, suggesting a phytoplankton source from earlier in the seasonal cycle. Overall, the largest known seasonal variations in N isotope composition have been observed in Lake Kinneret, providing a uniquely useful biogeochemical tool for studying N cycling in lakes as well as detecting long-term changes in N source and cycling in response to watershed land use changes and climate change.

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Contribution of methanotrophs to freshwater macroinvertebrates: evidence from stable isotope ratios

Cited by 74 publications

References 21 publications

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

High intraspecific variability in carbon and nitrogen stable isotope ratios of lake chironomid larvae

Seasonally varying nitrogen isotope biogeochemistry of particulate organic matter in Lake Kinneret, Israel

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