Environmental controls of whole-stream metabolism identified from continuous monitoring of Basque streams

Izagirre, Oihana; Agirre, Urko; Bermejo, M.; Pozo, Jesús; Elosegi, Arturo

doi:10.1899/07-022.1

Cited by 114 publications

(127 citation statements)

References 59 publications

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“…that support stream ecosystems and are a useful tool for evaluating and comparing different stream ecosystems (Odum 1968;Cummins et al 1983;Webster and Meyer 1997;Tank et al 2010). Multiple studies have created OM budgets in order to identify OM sources to consumers, evaluate the role of autotrophy in a given system, and to determine overall patterns by which OM inputs are used, altered and exported on an annual basis (Fisher and Likens 1973;Fisher 1977;Webster and Meyer 1997;Young and Huryn 1997;Izagirre et al 2008). The majority of these OM budgets were created for headwater streams in largely undisturbed watersheds and viewed OM as a limiting resource (Webster and Meyer 1997;Tank et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Beyond the urban stream syndrome: organic matter budget for diagnostics and restoration of an impaired urban river

2016

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In response to water quality standard violations linked to excessive organic matter (OM) and a lack of sampling data informing the Total Maximum Daily Load (TMDL), an organic matter budget was created to quantify and identify sources of OM in the lower Jordan River (Salt Lake City, UT). By sampling dissolved, fine, and coarse particulate OM, as well as measuring ecosystem metabolism at seven different sites, the researchers aimed to identify the origin of excess OM, and understand pathways by which different size classes of the OM pool are generated. The dissolved fraction (DOM; 94 %) was found to be the dominant form of OM transported within the river with fine particulate organic matter (FPOM; 6 %) the second most abundant, and coarse particulate organic matter (CPOM; 1 %) transport relatively insignificant in the overall OM budget. Primary production exceeded respiratory losses in the upper river, and this, along with OM inputs from two tributaries (where water reclamation facilities discharge into the river) delivered excess OM to the impaired lower reaches. Increasing stream metabolism index (SMI) with distance downstream (>1 in the lower river) further demonstrated that transport of excessive organic matter into the lower river was from upstream sources and not due to lateral inputs. This simple approach to characterizing the organic matter budget as it relates to water quality in the Jordan River was effective and could serve as a model for future studies attempting to quantify and identify sources of OM in urban ecosystems.Keywords Water quality impairment . Organic matter budget . Urban stream syndrome Urban Ecosyst (2016) 19:1623-1643 DOI 10.1007 A TMDL study defines the relationship between pollutant sources and in-stream water quality conditions. Based on this relationship, a permissible load is defined that will result in meeting state water quality standards and restore aquatic life beneficial use support for impaired segments of the river (UT DWQ 2012).

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Section: Introductionmentioning

confidence: 99%

Beyond the urban stream syndrome: organic matter budget for diagnostics and restoration of an impaired urban river

2016

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“…The drivers behind the inter-annual differences in GPP were not clear, although photosaturation regulating GPP in 2007 (Fig. 6), measurements capturing different stages of the Cladophora life cycle in different years, or a weak relationship between GPP and algal biomass (Uehlinger and Naegeli 1998;Izagirre et al 2008) may offer some potential explanations for this variation. We suggest that multiple years of metabolism measurements are needed in order to identify the longer term drivers of GPP in agricultural streams.…”

Section: Resultsmentioning

confidence: 99%

“…Insights into the temporal patterns and controls on GPP and ER can be made through continuous monitoring of whole-stream metabolism; however, these data are rare, and published studies are limited to gravel-bed rivers in Switzerland (Uehlinger and Naegeli 1998;Uehlinger 2006), a temperate forested headwater stream in Tennessee (Roberts et al 2007), 19 streams in northern Spain (Izagirre et al 2008), a fifth-order river in Idaho (Marcarelli et al 2010), and a suburban stream in Ohio . Current understanding of patterns and controls on GPP and ER in agricultural streams is based on limited periodic measurements of metabolism.…”

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confidence: 99%

Agricultural land use alters the seasonality and magnitude of stream metabolism

Griffiths

Tank

Royer

et al. 2013

Limnology & Oceanography

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We present a comprehensive data set of gross primary production (GPP) and ecosystem respiration (ER) in open-canopy, nutrient-rich streams draining row-crop agriculture in the midwestern United States. We used two approaches to characterize temporal and spatial variation in whole-stream metabolism: continuous measurements in one agricultural stream for 1 yr, and periodic daily measurements in six agricultural streams on six dates spanning summer, autumn, and winter. Continuous measurements revealed high rates of GPP (range: 0.1 to 22.0 g O 2 m 22 d 21 ) and ER (range: 20.9 to 234.8 g O 2 m 22 d 21 ) that varied seasonally with light availability and temperature. GPP and ER were correlated during periods of high autotrophic production, suggesting that autotrophic respiration comprised a large portion of ER; however, the GPP : ER ratio exceeded 1 for only 4% of the year. While there were distinct temporal patterns in metabolism in one agricultural stream, rates of GPP and ER were similar among six streams when assessed via periodic daily measurements, and 26% of all periodic daily measurements were autotrophic with GPP : ER . 1. However, these periodic measurements were collected under baseflow conditions and may have overestimated the extent of autotrophy in agricultural streams. Overall, the open canopy and elevated nutrients of agricultural streams resulted in higher rates of GPP and ER compared with more pristine systems. Estimates of metabolism are needed from underrepresented systems to accurately quantify carbon fluxes from fluvial ecosystems.

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“…These studies led to a better understanding of how the tempos, rates and timing of organic matter processing differ between PRS and NPRS (Datry et al, 2014a). Other studies focused on stream metabolism by continuous oxygen measurements (Acuña et al, 2004;Izagirre et al, 2008). Regarding the nutrient processes, von stressed that hypoxic conditions in disconnected pools can cause rapid ammonium and phosphate release from sediments.…”

Section: Biogeochemical Processesmentioning

confidence: 99%

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

Skoulikidis

Sabater

Datry

et al. 2017

Science of The Total Environment

224

134

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Non-perennial rivers and streams (NPRS) cover N 50% of the global river network. They are particularly predominant in Mediterranean Europe as a result of dry climate conditions, climate change and land use development. Historically, both scientists and policy makers underestimated the importance of NRPS for nature and humans alike, mainly because they have been considered as systems of low ecological and economic value. During the past decades, diminishing water resources have increased the spatial and temporal extent of artificial NPRS as well as their exposure to multiple stressors, which threatening their ecological integrity, biodiversity and ecosystem services. In this paper, we provide a comprehensive overview of the structural and functional characteristics of NPRS in the European Mediterranean, and discuss gaps and problems in their management, concerning their typology, ecological assessment, legislative and policy protection, and incorporation in River Basin Management Contents lists available at ScienceDirect Science of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n vPlans. Because NPRS comprise highly unstable ecosystems, with strong and often unpredictable temporal and spatial variability -at least as far as it is possible to assess -we outline the future research needs required to better understand, manage and conserve them as highly valuable and sensitive ecosystems. Efficient collaborative activities among multidisciplinary research groups aiming to create innovative knowledge, water managers and policy makers are urgently needed in order to establish an appropriate methodological and legislative background. The incorporation of NPRS in EU-Med River Basin Management Plans in combination with the application of ecological flows is a first step towards enhancing NPRS management and conservation in order to effectively safeguard these highly valuable albeit threatened ecosystems.

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Environmental controls of whole-stream metabolism identified from continuous monitoring of Basque streams

Cited by 114 publications

References 59 publications

Beyond the urban stream syndrome: organic matter budget for diagnostics and restoration of an impaired urban river

Beyond the urban stream syndrome: organic matter budget for diagnostics and restoration of an impaired urban river

Agricultural land use alters the seasonality and magnitude of stream metabolism

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

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