Elevated CO<sub>2</sub>alters leaf-litter-derived dissolved organic carbon: effects on stream periphyton and crayfish feeding preference

Kominoski, John S.; Moore, Paul A.; Wetzel, Robert G.; Tuchman, Nancy C.

doi:10.1899/07-002.1

Cited by 21 publications

(18 citation statements)

References 185 publications

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“…3 a Principal response curves for aquatic hyphomycetes assemblages associated with alder discs produced under ambient or elevated CO 2 concentrations and incubated in microcosms at 5 and 10°C for 73 days, b species scores (the higher the score, the more the species was stimulated by the treatments), c relative contribution of each species to the total conidial production. At Articulospora tetracladia Ingold, Ca Clavariopsis aquatica de Wildeman, H1 Heliscus lugdunensis Saccardo and Thérry, Lt Lemonniera terrestris Tubaki, Te Tetrachaetum elegans Ingold, Tm Tricladium marchalianum Ingold also affect periphytic algal accrual and further affect grazing invertebrates (Kominoski et al 2007). …”

Section: Discussionmentioning

confidence: 99%

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Ferreira

Chauvet

2011

Oecologia

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The predicted increase in atmospheric CO(2) concentration for this century is expected to lead to increases in temperature and changes in litter quality that can affect small woodland streams, where water temperature is usually low and allochthonous organic matter constitutes the basis of the food web. We have assessed the individual and interactive effect of water temperature (5 and 10°C) and alder litter quality produced under ambient CO(2) levels (ambient litter) or under CO(2) concentrations predicted for 2050 (elevated litter) on litter decomposition and on fungal activity and assemblage structure. Litter decomposition rates and fungal respiration rates were significantly faster at 10 than at 5°C, but they were not affected by litter quality. Litter quality affected mycelial biomass accrual at 5 but not at 10°C, while increases in temperature stimulated biomass accrual on ambient but not on elevated litter. A similar pattern was observed for conidial production. All variables were stimulated on elevated litter at 10°C (future scenario) compared with ambient litter at 5°C (present scenario), but interactions between temperature and litter quality were additive. Temperature was the factor that most strongly affected the structure of aquatic hyphomycete assemblages. Our results indicate that if future increases in atmospheric CO(2) lead to only slight modifications in litter quality, the litter decomposition and fungal activities and community structure will be strongly controlled by increased water temperature. This may have serious consequences for aquatic systems as faster litter decomposition may lead to food depletion for higher trophic levels.

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Section: Discussionmentioning

confidence: 99%

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Ferreira

Chauvet

2011

Oecologia

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“…influence the cellular composition of primary producers, which typically have CNP ratios that reflect ambient environmental concentrations (Elser and Hessen, 2005;Kominoski et al, 2007;Redfield, 1934). Changes in environmental CO 2 concentrations will alter the elemental composition of C:nutrient ratios in autotrophs (Hessen et al, 2004Urabe et al, 2003), which possess considerable stoichiometric plasticity relative to their more B A Figure 8 Control (right-hand channel, B, in the photograph) and monthly dewatered (left-hand channel, A) food webs for two experimental stream channels, constructed at the end of a 22-month hydrological manipulation conducted by Ledger et al (2009).…”

Section: Network Responses To the Components Of Climate Change: Atmentioning

confidence: 99%

“…It remains to be seen how the interplay between these two types of trophic pathway will respond to climate change, but some initial studies suggest that elevated CO 2 can shift the balance from the relative importance of algae versus detritus to the higher trophic levels (e.g. Kominoski et al, 2007).…”

Section: Network Responses To the Components Of Climate Change: Atmentioning

confidence: 99%

Ecological Networks in a Changing Climate

Woodward¹,

Benstead²,

Beveridge³

et al. 2010

Advances in Ecological Research

146

152

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“…The various agents associated with climate change have been reported as possible causes for the observed increased DOC levels in several natural water systems [11,12,14,68,69,76,77,79,89,97,98,100,101,[123][124][125][126][127][128][129]. As precipitation and its associated hydrology changes are functions of our natural climate, they too have been proposed as dynamics that will change with climate change [121].…”

Section: Climate Change Driven Increases In Docmentioning

confidence: 99%

Trends in Levels of Allochthonous Dissolved Organic Carbon in Natural Water: A Review of Potential Mechanisms under a Changing Climate

Pagano

Bida

Kenny

2014

Water

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Over the past several decades, dissolved organic carbon (DOC) in inland natural water systems has been a popular research topic to a variety of scientific disciplines. Part of the attention has been due to observed changes in DOC concentrations in many of the water systems of the Northern Hemisphere. Shifts in DOC levels, and changes in its composition, are of concern due to its significance in aquatic ecosystem functioning and its potential and realized negative effects on waters that might be treated for drinking purposes. While it may not be possible to establish sound cause and effect relationships using a limited number of drivers, through long-term DOC monitoring studies and a variety of laboratory/field experiments, several explanations for increasing DOC trends have been proposed, including two key mechanisms: decreased atmospheric acid deposition and the increasing impact of climate change agents. The purpose of this review is three-fold: to outline frequently discussed conceptual mechanisms used to explain DOC increases (especially under a changing climate), to discuss the structure of DOC and the impact of higher levels of DOC on drinking water resources, and to provide renewed/sustained interest in DOC research that can encourage interdisciplinary collaboration. Understanding the cycling of carbon from terrestrial ecosystems into natural waters is necessary in the face of a variable OPEN ACCESSWater 2014, 6 2863 and changing climate, as climate change-related mechanisms may become increasingly responsible for variations in the inputs of allochthonous DOC concentrations in water.

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Elevated CO₂alters leaf-litter-derived dissolved organic carbon: effects on stream periphyton and crayfish feeding preference

Cited by 21 publications

References 185 publications

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Ecological Networks in a Changing Climate

Trends in Levels of Allochthonous Dissolved Organic Carbon in Natural Water: A Review of Potential Mechanisms under a Changing Climate

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Elevated CO2alters leaf-litter-derived dissolved organic carbon: effects on stream periphyton and crayfish feeding preference

Cited by 21 publications

References 185 publications

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams

Ecological Networks in a Changing Climate

Trends in Levels of Allochthonous Dissolved Organic Carbon in Natural Water: A Review of Potential Mechanisms under a Changing Climate

Contact Info

Product

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About

Elevated CO₂alters leaf-litter-derived dissolved organic carbon: effects on stream periphyton and crayfish feeding preference