A modeling approach for assessing the effect of multiple alpine lakes in sequence on nutrient transport

Epstein, Dave M.; Neilson, Bethany T.; Goodman, K. J.; Stevens, David King; Wurtsbaugh, Wayne A.

doi:10.1007/s00027-012-0267-2

Cited by 23 publications

(24 citation statements)

References 48 publications

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“…A similar buffering behavior has been described in oligotrophic mountain lakes, both for dissolved (Goodman et al 2011;Kang et al 2016) and particulate (Epstein et al 2013) organic matter, as well as inorganic nutrients (Wurtsbaugh et al 2005;Brown et al 2008). However, our nearly balanced DOC mass balance contrasts with the common finding of clear-water lakes as a source of DOC (Kling et al 2000;Brown et al 2008;Epstein et al 2013;Kalinin et al 2016).…”

Section: Hydrological Controls Of the Doc Mass Balancesupporting

confidence: 74%

Climate‐induced hydrological variation controls the transformation of dissolved organic matter in a subalpine lake

Ejarque

Khan

Steniczka

et al. 2018

Limnology & Oceanography

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Lakes are an inherent component of the global carbon cycle. They receive dissolved organic matter (DOM) from the catchment, which is stored, transformed and respired, or delivered downstream. In this study, we show that a subalpine lake shifts its role from DOM “transporter” to “transformer” depending on season and climate. We monitored dissolved organic carbon (DOC) concentration and DOM optical properties at the inlet and outlet of subalpine Lake Lunz (Austria) at high frequency during two contrasting years: an extreme drought in 2015, and regular precipitation regime in 2016. During both years, the DOC mass balance revealed that inflowing and outflowing DOC loads were nearly balanced (+6.57% and +1.70% DOC production in 2015 and 2016, respectively). However, DOM optical properties revealed an in‐lake turnover of DOM compounds, so that the terrestrial and aromatic signature of inflowing DOM was modified into autochthonous, protein‐like DOM. The magnitude of this transformation varied seasonally, being maximal in summer and minimal in winter, presumably following periods of high and low primary production and photo‐degradation. Inter‐annually, we found that drought further increased DOM transformation during summer by extending the lake water residence time. Finally, our results demonstrate a rapid response of DOM dynamics to hydrological and meteorological changes at both seasonal and inter‐annual scales, suggesting that carbon cycling in clear‐water mountain lakes may be highly sensitive to hydrological variation.

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Section: Hydrological Controls Of the Doc Mass Balancesupporting

confidence: 74%

Climate‐induced hydrological variation controls the transformation of dissolved organic matter in a subalpine lake

Ejarque

Khan

Steniczka

et al. 2018

Limnology & Oceanography

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“…Lentic systems have also been shown to decrease intraannual variability in DOC export (Goodman et al, 2011) and constitute a significant component of the global carbon cycle (Tranvik et al, 2009). Recent inventories have demonstrated that lentic systems dominate the areal extent of continental waters (Downing, 2010), and their influence on nutrient dynamics is being recognized at watershed (Epstein et al, 2013;Jones, 2010), regional (Powers et al, 2014), continental (Bouwman et al, 2013a), and global (Downing, 2010;Tranvik et al, 2009) extents.…”

Section: Accepted Manuscriptmentioning

confidence: 97%

Hydrologic connectivity as a framework for understanding biogeochemical flux through watersheds and along fluvial networks

2017

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“…For example, lentic bodies are composed of still waters and are frequently viewed as annual net sinks for phosphorus and nitrogen (Harrison et al, 2009), but are also important sub-annually by influencing the export of nutrients to downstream reaches (Wurtsbaugh et al, 2005;Kendall et al, 2001). The magnitude of these effects shifts with position in the watershed and river network (Jones, 2010;Swanson et al, 1988), as well as with relative proximity to other lentic bodies (Epstein et al, 2012;Kelly, 2001). Lentic waters also affect processing within adjacent lotic reaches; comparisons between river reaches above and below lentic bodies have shown significant differences in water quality and nutrient processing (Goodman et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The upside-down river: Reservoirs, algal blooms, and tributaries affect temporal and spatial patterns in nitrogen and phosphorus in the Klamath River, USA

Oliver

Dahlgren

Deas³

2014

Journal of Hydrology

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s u m m a r yThe Klamath River, located in Oregon/California of the Northwestern U.S., is highly impounded and also experiences large seasonal algal blooms and impaired water quality. We investigated nitrogen (N) and phosphorus (P) constituents for one year (2010-2011) across 193 km of the Klamath River at sites above and below reservoirs and major tributaries to determine the influence of these features on longitudinal and temporal trends in concentrations, loads, and N:P ratios. In general, the headwater lake (Upper Klamath Lake) and reservoirs appeared to be the dominant influence on water quality and nutrient dynamics in the upper river, whereas tributaries appeared to exert stronger influence in the lower river. Overall, high nutrients and poor water quality at upstream sites were ameliorated downstream, however the downstream reductions in N were much greater relative to P. Seasonality appeared to play a major role in the overall appearance and magnitude of longitudinal trends. The greatest upstream-downstream differences occurred during periods of time following large algal blooms in the upper portion of the river. Overall, the amount and composition of N appeared to be strongly driven by algal blooms and biogeochemical conditions such as low oxygen, high pH and warm temperatures in the upper portion of the river, whereas P was more strongly driven by seasonal hydrology. The spatiotemporal influence of reservoirs and tributaries on nutrient flux and nutrient ratios may have significant implications for aquatic communities and ecosystem health. Nutrient objectives should be considered when designing restoration, management, and monitoring objectives for projects involving habitat suitability for anadromous fish and potential dam removal.

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A modeling approach for assessing the effect of multiple alpine lakes in sequence on nutrient transport

Cited by 23 publications

References 48 publications

Climate‐induced hydrological variation controls the transformation of dissolved organic matter in a subalpine lake

Climate‐induced hydrological variation controls the transformation of dissolved organic matter in a subalpine lake

Hydrologic connectivity as a framework for understanding biogeochemical flux through watersheds and along fluvial networks

The upside-down river: Reservoirs, algal blooms, and tributaries affect temporal and spatial patterns in nitrogen and phosphorus in the Klamath River, USA

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