Linking Planktonic Biomass and Metabolism to Net Gas Fluxes in Northern Temperate Lakes

Giorgio, Paul A. del; Cole, Jonathan J.; Caraco, Nina F.; Peters, Robert H.

doi:10.2307/177085

Cited by 94 publications

(123 citation statements)

References 0 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…The CO 2 flux was significantly and positively correlated with water temperature and DOC concentrations (Table 2). Similar correlations were reported in 75 to 95% of the lakes in northern and temperate regions where the gas emissions are supported by inputs of organic matter (Del Giorgio et al 1999). Therefore, the decomposition of DOC caused by daily feed supply is also supposed to accelerate CO 2 emissions of the ponds.…”

Section: Factors Affecting Co 2 Emissionssupporting

confidence: 78%

Variations in CO2 fluxes from grass carp Ctenopharyngodon idella aquaculture polyculture ponds

Chen¹,

Dong²,

Wang³

et al. 2015

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

Section: Factors Affecting Co 2 Emissionssupporting

confidence: 78%

Variations in CO2 fluxes from grass carp Ctenopharyngodon idella aquaculture polyculture ponds

Chen¹,

Dong²,

Wang³

et al. 2015

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

“…Allochthonous C inputs can play an important role in whole ecosystem metabolism, with inputs that can equal or exceed internal primary productivity (Hynes 1970;Cummins et al 1973;Fisher and Likens 1973;Caraco and Cole 2004;Cole et al 2006). For example, many lake ecosystems experience negative NEP due to high respiration rates, but maintain a positive net C storage due to the high influx of allochthonous C (Del Giorgio and Peters 1994;Del Giorgio et al 1999;Cole et al 2000). In our study wetland we documented a similar trend, with low rates of NEP due to high respiratory demand; but a substantial positive carbon balance in the system due to high inputs of allochthonous POC.. Autochthonous C is considered relatively labile and easily metabolized, in contrast to allochthonous sources which are considered largely recalcitrant (Wetzel 1992).…”

Section: Autochthonous and Allochthonous Carbon Loadsmentioning

confidence: 99%

Autochthonous and Allochthonous Carbon Cycling in a Eutrophic Flow-Through Wetland

2014

View full text Add to dashboard Cite

Wetland environments are important sites for the cycling and retention of terrestrially derived organic matter and nutrients. Wetland treatment of agricultural runoff has been shown to improve water quality and promote carbon sequestration. However, the potential role of eutrophic wetlands as a source of algal loading contributing to downstream hypoxia has prompted interest in understanding algal productivity and export from these systems. This study, in the San Joaquin Valley, California, quantified a mass balance of carbon and nutrients within a seasonally-saturated constructed wetland receiving agricultural runoff, as well as quantifying autochthonous carbon production on four sampling dates during a year with minimal emergent vegetation. Results from this study show that the wetland was a net-sink for nutrients and particulate/dissolved organic carbon. Despite high concentrations of inflowing nutrients and high rates of primary productivity, high respiration rates limited net organic C production and export due to high heterotrophic activity. The addition of high C loads in inflowing water and moderate retention efficiencies, however, resulted in a positive C retention during most sampling dates. This study provides valuable insight into the connection between elevated carbon and nutrient inflows, their effects on autochthonous carbon production, and resulting carbon and nutrient outflows.

show abstract

“…The net CO 2 flux from these lake surfaces into the atmosphere depict that the water column in these ecosystems are CO 2 supersaturated. Therefore, lakes are considered net heteretrophic ecosystems (del Giorgio et al 1999), meaning that, organic carbon mineralization by heterotrophic organisms, exceeds CO 2 fixation by the phototrophic ones.…”

Section: Introductionmentioning

confidence: 99%

The role played by aquatic macrophytes regarding CO2 balance in a tropical coastal lagoon (Cabiúnas Lagoon, Macaé, RJ)

Gripp¹,

Marinho²,

Sanches³

et al. 2013

Acta Limnol. Bras.

View full text Add to dashboard Cite

The role played by aquatic macrophytes regarding CO 2 balance in a tropical coastal lagoon (Cabiúnas Lagoon, Macaé, RJ)O papel desempenhado pelas macrófitas aquáticas em relação ao balanço de CO 2 em uma lagoa costeira tropical (Lagoa Cabiúnas, Macaé, RJ) 2 ) is an important atmospheric trace gas that is involved in both the biological carbon cycle and global warming. Inland waters -mainly lakes -contribute to C cycling and have been considered a large source of atmospheric CO 2 . However, scientific studies usually neglect lake morphometry and the presence of aquatic macrophytes in littoral zones, which have a great potential for CO 2 absorption and for C storage. This study aimed to evaluate the importance of the littoral region on the CO 2 balance in the Cabiúnas Lagoon, while also considering the contribution of the limnetic region and of Typha domingensis and Eichhornia azurea, prominent species in the area. Methods: CO 2 flux was estimated by a linear integration of CO 2 concentrations measured in the internal atmospheric of a single-component static closed chambers at the studied sites. The distribution of macrophyte stands throughout lagoon surface was taken into account to evaluate the effects of macrophytes on CO 2 supersaturation. Other factors were also measured throughout the sampling process to evaluate their relationship with CO 2 flux data by means of Akaike model selection criterion. The area covered by aquatic macrophytes at the Cabiúnas lagoon was estimated by profiles and transects. Results and discussion: CO 2 flux through the water surface ranged from -7.39 to 17.56 mgCO2m -2 h -1 . An emission pattern predominated, suggesting that water columns are CO 2 supersaturated at all sampling sites. Rates were similar among all the sampling sites, suggesting that aquatic macrophytes do not influence CO 2 saturation in the water column at Cabiúnas lagoon. On the other hand, CO 2 fluxes from macrophyte tissues showed a clear assimilation pattern. Influxes were higher in T. domingensis (-229.1 ± 320.9 mg CO2.m -2 .h -1 ) than in E. azurea stands (-43.8 ± 39.5 mg CO2.m -2 .h -1 ). Once these macrophytes covered a considerable area of the lagoon and CO 2 absorption strongly overwhelmed the emission processes, then we were able to extrapolate data from the total estimated area of the evaluated sites (75% of the Cabiúnas lagoon), which resulted in a net influx of 46.6 mg CO2.m -2 .h -1 . The strong Typha domingensis contribution to CO 2 absorption and other C cycling processes indicate that it is one of the most important species to Carbon cycling in the studied ecosystem. Thus, it is worth considering C cycling in lake littoral zones as a key process when estimating C balance in shallow aquatic ecosystems.

show abstract

Linking Planktonic Biomass and Metabolism to Net Gas Fluxes in Northern Temperate Lakes

Cited by 94 publications

References 0 publications

Variations in CO2 fluxes from grass carp Ctenopharyngodon idella aquaculture polyculture ponds

Variations in CO2 fluxes from grass carp Ctenopharyngodon idella aquaculture polyculture ponds

Autochthonous and Allochthonous Carbon Cycling in a Eutrophic Flow-Through Wetland

The role played by aquatic macrophytes regarding CO2 balance in a tropical coastal lagoon (Cabiúnas Lagoon, Macaé, RJ)

Contact Info

Product

Resources

About