Advancing Science for Water Resources Management

Petts, Geoffrey E.; Nestler, John M.; Kennedy, Robert H.

doi:10.1007/s10750-005-1919-1

Cited by 48 publications

(25 citation statements)

References 49 publications

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“…As the relative strength of the major carbon pathways changes, the success of management strategies will be affected as well. Adaptive management strategies will help to address the uncertainty and variability inherent in climate change (Clark 2002;Petts et al 2006). Long-term monitoring (e.g., the deployment of sensors that measure CDOM and CO 2 ) will indicate changes in carbon inflow and pathways and will allow for appropriate modifications to watershed and lake management (Adrian et al 2009).…”

Section: Current Role Of Lakes In the Global C Cyclementioning

confidence: 99%

Lakes and reservoirs as regulators of carbon cycling and climate

Tranvik

Downing

Cotner

et al. 2009

Limnology & Oceanography

2,231

1,756

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We explore the role of lakes in carbon cycling and global climate, examine the mechanisms influencing carbon pools and transformations in lakes, and discuss how the metabolism of carbon in the inland waters is likely to change in response to climate. Furthermore, we project changes as global climate change in the abundance and spatial distribution of lakes in the biosphere, and we revise the estimate for the global extent of carbon transformation in inland waters. This synthesis demonstrates that the global annual emissions of carbon dioxide from inland waters to the atmosphere are similar in magnitude to the carbon dioxide uptake by the oceans and that the global burial of organic carbon in inland water sediments exceeds organic carbon sequestration on the ocean floor. The role of inland waters in global carbon cycling and climate forcing may be changed by human activities, including construction of impoundments, which accumulate large amounts of carbon in sediments and emit large amounts of methane to the atmosphere. Methane emissions are also expected from lakes on melting permafrost. The synthesis presented here indicates that (1) inland waters constitute a significant component of the global carbon cycle, (2) their contribution to this cycle has significantly changed as a result of human activities, and (3) they will continue to change in response to future climate change causing decreased as well as increased abundance of lakes as well as increases in the number of aquatic impoundments.

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Section: Current Role Of Lakes In the Global C Cyclementioning

confidence: 99%

Lakes and reservoirs as regulators of carbon cycling and climate

Tranvik

Downing

Cotner

et al. 2009

Limnology & Oceanography

2,231

1,756

View full text Add to dashboard Cite

show abstract

“…This could lead to development of a web-based, shared portfolio of benchmark sites and scoring protocols for European hydro-ecoregions, taking forward work started by the STAR project (Furse et al, 2006). It would also build on recent initiatives in Poland, Italy, Portugal and Spain where training programmes for RHS and other methods are being implemented to support WFD work programmes (Raven et al, 2009) and which could deliver the shared scientific programmes and effective knowledge exchange advocated by Benda et al (2004), Petts et al (2006) and Vaughan et al (2009).…”

Section: A Common Framework For Quality Assessment In Europementioning

confidence: 99%

Benchmarking habitat quality: observations using River Habitat Survey on near‐natural streams and rivers in northern and western Europe

Raven

Holmes²,

Vaughan

et al. 2010

Aquatic Conservation

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ABSTRACT1. Some ecological effects of physically modifying rivers are still unclear, partly due to scale factors, but also because the character of high quality habitat is poorly understood.2. Surveys at 278 sites on 141 near-natural streams and rivers in northern and western Europe were carried out between 1994 and 2009 to benchmark the habitat quality assessment system used for River Habitat Survey (RHS).3. The objectives were to establish if RHS was suitable outside the UK, investigate if 500 m was still valid as the survey length, suggest a benchmarking strategy and recommend improvements to habitat quality assessment protocols.4. Some modifications to RHS are needed to take account of differences in hydrological conditions, land-use and, most importantly, riparian habitat structure found in mainland Europe.5. On average, 82-87% of channel attributes and 87-98% of channel and bank features were recorded within the first of consecutive RHS sites, confirming that 500 m is an effective sample length for characterizing small rivers.6. Stream-flow character appeared to influence the distribution of several in-channel features, with greater diversity and between-site variation associated with rivers of mixed flow-types. To account for local variation and for effective use of survey time, it is recommended that two or more consecutive RHS sites are used for benchmarking purposes.7. A suite of assessment protocols with agreed criteria and analytical rules, linked to specific objectives (e.g. nature conservation, geomorphic condition), is needed to establish the character and habitat quality of rivers in a consistent fashion.8. A multi-discipline benchmarking programme using hydro-ecological regions in Europe would build on existing knowledge and help to improve both the inter-calibration and local application of quality assessment protocols. Data-sharing by hydrologists, river ecologists and fluvial geomorphologists would improve the basis for managing rivers in support of the European Water Framework Directive and Habitats Directive.

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“…In Texas, 44% of native freshwater fishes are considered imperiled (Hubbs et al ., 2008). Despite the alarming rate of species imperilment and the subsequent increasing trend of fish homogenization (Rahel, 2000), successful conservation of warm‐water stream fishes can be enhanced with water quality and quantity management (Angermeier, 1995; Pister, 1999; Richter et al ., 2003; Petts et al ., 2006).…”

Section: Introductionmentioning

confidence: 99%

Long‐term changes in flow regime and fish assemblage composition in the guadalupe and san marcos rivers of texas

Perkin¹,

Bonner²

2011

River Research & Apps

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Riverine flow regimes are naturally dynamic, but become increasingly homogenized following anthropogenic flow alteration. Loss of dynamism disrupts naturally occurring structuring mechanisms within the associated biotic communities, at times causing shifts in composition. Here we considered how stream fish assemblages in two Central Texas rivers changed after alteration of flow regime by either construction of a mainstem, deep storage reservoir or flood-retaining structures. Following impoundment, number of large and small floods increased from 0.81 to 1.07 floods per year (FPY) in the upper Guadalupe River, decreased from 0.84 to 0.42 FPY in the lower Guadalupe River and decreased from 0.87 to 0.7 FPY in the San Marcos River. Historical ichthyofauna data ranging from 1938 to 2006 were used to assess changes in assemblage composition and species abundance. Assemblages did not differ in the upper Guadalupe River (Bray-Curtis index ¼ 37.4%; ANOSIM global R ¼ 0.079, p ¼ 0.08), but did differ in the lower Guadalupe River (25%; global R ¼ 0.409, p < 0.01) and San Marcos River (27%; global R ¼ 0.19, p < 0.01). In general, habitat generalist species dominated assemblages during periods of reduced flood frequencies (i.e. drought of record; following impoundment), whereas regionally endemic species (N ¼ 3) and substrate and broadcast spawning species (N ¼ 5) declined (b 1 < 0; a ¼ 0.05). Based on the results from this study, managing flows in the lower Guadalupe River to mimic historical timing of flood pulses might attenuate contemporary disruption of natural assemblage composition.

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Advancing Science for Water Resources Management

Cited by 48 publications

References 49 publications

Lakes and reservoirs as regulators of carbon cycling and climate

Lakes and reservoirs as regulators of carbon cycling and climate

Benchmarking habitat quality: observations using River Habitat Survey on near‐natural streams and rivers in northern and western Europe

Long‐term changes in flow regime and fish assemblage composition in the guadalupe and san marcos rivers of texas

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