The invasive Asian clam (<i>Corbicula fluminea</i>) increases sediment denitrification and ammonium flux in 2 streams in the midwestern USA

Turek, K.; Hoellein, Timothy J.

doi:10.1086/680400

Cited by 35 publications

(25 citation statements)

References 47 publications

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“…When the correlation between environmental factors and C. fluminea and U. delphinus densities were analysed, only the ammonium and phosphate concentrations in the water column were found to be significant and positively correlated with each species, respectively. Turek and Hoellein () suggested that C. fluminea increased nitrogen flux via direct excretion or mineralization of clam wastes. Vaughn, Gido, and Spooner () related nutrient excretion (including phosphorus) to overall freshwater mussel biomass.…”

Section: Discussionmentioning

confidence: 99%

First evidence of asymmetric competition between the non‐native clam Corbicula fluminea and the native freshwater mussel Unio delphinus during a summer heat wave

Ferreira‐Rodríguez

Fandino

Pedreira

et al. 2018

Aquatic Conservation

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1. Non-native species introductions are a major concern for the conservation of natural ecosystems. The spread of non-native species depends not only on their adaptation to the new environment, but also on the biotic features of the nonnative and resident native species and their environment that determine competition in natural habitats.2. There is little empirical evidence from field studies that demonstrates the existence of competition between the non-native clam Corbicula fluminea and native freshwater mussels, and even less evidence on how global warming might affect competition and re-shape ecological communities.3. In this study, field surveys within the biogeographic Atlantic region in the north west of the Iberian Peninsula found little spatial overlap between C. fluminea and the native freshwater mussel Unio delphinus.4. In the laboratory, intraspecific and interspecific competition between these freshwater bivalves was assessed through physiological parameters and nutritional condition in a global warming context. A significant effect for the physiological parameters and nutritional condition ofintraspecific competition was found in C. fluminea, whereas asymmetric competition was evidenced between both species at greater densities of C. fluminea.6. Under simulated heat wave conditions, the non-native C. fluminea was competitively superior to the native freshwater mussels when both occur together. 7. Present findings suggest that further population declines of freshwater mussels in the Iberian Peninsula are expected under conditions of global warming, owing to competition with C. fluminea. SUPPORTING INFORMATIONAdditional supporting information may be found online in the Supporting Information section at the end of the article.How to cite this article: Ferreira-Rodríguez N, Fandiño L, Pedreira A, Pardo I. First evidence of asymmetric competition between the non-native clam Corbicula fluminea and the native freshwater mussel Unio delphinus during a summer heat wave.

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Section: Discussionmentioning

confidence: 99%

First evidence of asymmetric competition between the non‐native clam Corbicula fluminea and the native freshwater mussel Unio delphinus during a summer heat wave

Ferreira‐Rodríguez

Fandino

Pedreira

et al. 2018

Aquatic Conservation

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“…One of the more common MIMS methods used to estimate denitrification is the continuous-flow core method. The continuous-flow core method originated in estuarine sediments [Kana et al, 1998;An et al, 2001;Gardner and McCarthy, 2009] but has since been applied in freshwater ecosystems [Bernot et al, 2003;Smith et al, 2006;Turek and Hoellein, 2015]. Continuous-flow cores overcome some of the major limitations for estimating denitrification [Groffman et al, 2006] by using intact sediment cores with natural substrate availability and no chemical inhibitors.…”

Section: Partitioning Water Column and Sediment Processesmentioning

confidence: 99%

“…Technological developments have facilitated several denitrification estimates using dissolved N 2 measurements made with membrane-inlet mass spectrometry (MIMS) [Kana et al, 1994] for high-precision estimates of dissolved N 2 , oxygen (O 2 ), and argon (Ar). The MIMS approach has most commonly been used in estuarine studies [Kana et al, 1998;An et al, 2001;Gardner and McCarthy, 2009] but is increasingly used in freshwater ecosystems both at mesocosm [Smith et al, 2006;Fork and Heffernan, 2014;Turek and Hoellein, 2015] and reach scales [Laursen and Seitzinger, 2002;Baulch et al, 2010]. Denitrification estimates from previous reach-scale approaches [Laursen and Seitzinger, 2002;McCutchan et al, 2003;Pribyl et al, 2005] are high compared to other aquatic ecosystems, but these high rates may be due to uncertainty involved in parameters needed for reach-scale denitrification models [Baulch et al, 2010].…”

Section: Introductionmentioning

confidence: 99%

Sediment, water column, and open‐channel denitrification in rivers measured using membrane‐inlet mass spectrometry

et al. 2016

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Riverine biogeochemical processes are understudied relative to headwaters, and reach-scale processes in rivers reflect both the water column and sediment. Denitrification in streams is difficult to measure, and is often assumed to occur only in sediment, but the water column is potentially important in rivers. Dissolved nitrogen (N) gas flux (as dinitrogen (N 2 )) and open-channel N 2 exchange methods avoid many of the artificial conditions and expenses of common denitrification methods like acetylene block and 15 N-tracer techniques. We used membrane-inlet mass spectrometry and microcosm incubations to quantify net N 2 and oxygen flux from the sediment and water column of five Midwestern rivers spanning a land use gradient. Sediment and water column denitrification ranged from below detection to 1.8 mg N m À2 h À1 and from below detection to 4.9 mg N m À2 h À1 , respectively. Water column activity was variable across rivers, accounting for 0-85% of combined microcosm denitrification and 39-85% of combined microcosm respiration. Finally, we estimated reach-scale denitrification at one Midwestern river using a diel, open-channel N 2 exchange approach based on reach-scale metabolism methods, providing an integrative estimate of riverine denitrification. Reach-scale denitrification was 8.8 mg N m À2 h À1 (95% credible interval: 7.8-9.7 mg N m À2 h À1 ), higher than combined sediment and water column microcosm estimates from the same river (4.3 mg N m À2 h À1 ) and other estimates of reach-scale denitrification from streams. Our denitrification estimates, which span habitats and spatial scales, suggest that rivers can remove N via denitrification at equivalent or higher rates than headwater streams.

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“…Although clam cultivation in Cherrystone Inlet tends to favor DNRA, the overall effect of bivalves on

{NO}_{3}^{-}

respiration rates is quite variable and highly dependent on the environment and type of bivalve. Some studies report denitrification enhancement in bivalve‐dominated sediments compared to reference locations (Kellogg et al ; Smyth et al ; Turek and Hoellein ) while other studies show no difference in denitrification across sediment types (Christensen et al ; Jones et al ; Higgins et al ). Still other studies report spatial and/or temporal variability on the effects of bivalves on sediment denitrification (Nizzoli et al ; Carlsson et al ) and recently a study reported a decrease in denitrification in the presence of high clam abundance (Bonaglia et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Microbial nitrogen processing in hard clam ( Mercenaria mercenaria ) aquaculture sediments: the relative importance of denitrification and dissimilatory nitrate reduction to ammonium (DNRA)

et al. 2016

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As bivalve aquaculture expands worldwide, an understanding of its role in nutrient cycling is necessary to ensure ecological sustainability and determine the potential of using bivalves for nutrient mitigation. Whereas several studies, primarily of epifaunal bivalves, have assessed denitrification, few have considered nutrient regeneration processes such as dissimilatory nitrate reduction to ammonium (DNRA), which competes with denitrification for nitrate and results in nitrogen retention rather than loss. This study compares sediment nitrogen cycling including mineralization, DNRA, and denitrification within U.S. clam aquaculture sediments to nearby uncultivated sediments, seasonally. Clam aquaculture significantly increased sediment ammonium and phosphate effluxes relative to uncultivated sediments. Both DNRA and denitrification were significantly enhanced at clam beds compared to uncultivated sediments in July and November, while in May only DNRA was increased. The ratio of DNRA to denitrification was significantly higher at clam beds compared to uncultivated sediments, demonstrating that DNRA may be favored due to a ready supply of labile organic carbon relative to nitrate and perhaps sulfidic conditions. Functional gene abundances, nrfA (DNRA) and nirS (denitrification) followed similar patterns to nitrate respiration rates with highest nrfA abundances in the clam sediments and similar nirS abundances across seasons and sediment type. Ultimately clam sediments were found to be a significant source of nutrients to the water column whereas uncultivated sediments retained ammonium produced by microbial mineralization. Thus, clam cultivation may promote local eutrophication (i.e., increased primary production) by facilitating nutrient regeneration and retention of ammonium in the sediments.

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The invasive Asian clam (Corbicula fluminea) increases sediment denitrification and ammonium flux in 2 streams in the midwestern USA

Cited by 35 publications

References 47 publications

First evidence of asymmetric competition between the non‐native clam Corbicula fluminea and the native freshwater mussel Unio delphinus during a summer heat wave

First evidence of asymmetric competition between the non‐native clam Corbicula fluminea and the native freshwater mussel Unio delphinus during a summer heat wave

Sediment, water column, and open‐channel denitrification in rivers measured using membrane‐inlet mass spectrometry

Microbial nitrogen processing in hard clam ( Mercenaria mercenaria ) aquaculture sediments: the relative importance of denitrification and dissimilatory nitrate reduction to ammonium (DNRA)

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