Ecology and management of the hyporheic zone: stream–groundwater interactions of running waters and their floodplains

Journal of the North American Benthological Society, Journal Year: 2010, Volume and Issue: 29(1), P. 26 - 40

Published: March 1, 2010

Over the last 25 y, stream ecosystem theory has expanded to include explicitly vertical dimension of surface–groundwater linkages via hyporheic zone and below alluvial floodplains. Hydrological exchange between mediates transport products from biogeochemical activities within sediments. Hot-spots primary productivity in surface often result upwelling nutrient-rich water. Conversely, downwelling water supplies organic matter dissolved O2 invertebrates microbes, enhancing productivity. Many papers seminal conceptual empirical advances research have been published J-NABS, reflecting benthologists' awareness relevance processes biota zone. However, major gaps remain. One is need for further data test predictions several current frameworks that hypothesize conditions under which might be expected contribute most metabolism, especially large rivers with shallow aquifers. A second how apply findings about functional significance river restoration conservation. restore or protect habitats probably benefit fauna as well, but this prediction should tested. Last, sediments occur across multiple hierarchical spatial scales, we are yet understand fully these interactions extrapolate successfully scales. J-NABS continue play a significant role publishing on extend scope applications floodplain management restoration.

Language: Английский

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Phosphorus Retention in Riparian Buffers: Review of Their Efficiency

Journal of Environmental Quality, Journal Year: 2009, Volume and Issue: 38(5), P. 1942 - 1955

Published: Aug. 25, 2009

Ground water and surface interactions are of fundamental importance for the biogeochemical processes governing phosphorus (P) dynamics in riparian buffers. The four most important conceptual hydrological pathways P losses from retention buffers reviewed this paper: (i) diffuse flow path with ground through aquifer, (ii) overland across buffer coming adjacent agricultural fields, (iii) irrigation tile drainage fields where disconnected drains irrigate buffer, (iv) inundation (floodplain) river during short or longer periods. We have examined how different paths influence mechanisms theoretically empirical evidence. determine water-borne compounds meet interact iron aluminum oxides other minerals geochemical cycling complex dynamic environment that constitutes a buffer. main physical process buffer-sedimentation-is active along several may account rates up to 128 kg ha(-1) yr(-1), while plant uptake temporarily immobilize 15 yr(-1). Retention dissolved is not as pronounced particulate often below 0.5 Several studies show significant release (i.e., 8 yr(-1)).

Language: Английский

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Groundwater–surface water mixing shifts ecological assembly processes and stimulates organic carbon turnover

Nature Communications, Journal Year: 2016, Volume and Issue: 7(1)

Published: April 7, 2016

Environmental transitions often result in resource mixtures that overcome limitations to microbial metabolism, resulting biogeochemical hotspots and moments. Riverine systems, where groundwater mixes with surface water (the hyporheic zone), are spatially complex temporally dynamic, making development of predictive models challenging. Spatial temporal variations zone communities a key, but understudied, component riverine function. Here, investigate the coupling among groundwater–surface mixing, biogeochemistry, we apply ecological theory, aqueous DNA sequencing ultra-high-resolution organic carbon profiling field samples collected across times locations representing broad range mixing conditions. Our results indicate stimulates heterotrophic respiration, alters composition, causes processes shift from stochastic deterministic is associated elevated abundances taxa may degrade suite compounds. Groundwater-surface zones link critical ecosystem domains, attendant microbe-biogeochemistry-hydrology interactions poorly known. authors show groundwater-surface shifts ecology deterministic.

Language: Английский

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Hydrological connectivity for riverine fish: measurement challenges and research opportunities

Freshwater Biology, Journal Year: 2010, Volume and Issue: 55(11), P. 2215 - 2237

Published: June 9, 2010

Summary 1. In this review, we first summarize how hydrologic connectivity has been studied for riverine fish capable of moving long distances, and then identify research opportunities that have clear conservation significance. Migratory species, such as anadromous salmonids, are good model organisms understanding ecological in rivers because the spatial scale over which movements occur among freshwater habitats is large enough to be easily observed with available techniques; they often economically or culturally valuable can fragmented by human activities; integrate landscape conditions from multiple surrounding catchment(s) in‐river conditions. Studies focussed on three themes: (i) relatively stable connections (connections controlled processes act broad spatio‐temporal scales >1000 km 2 >100 years); (ii) dynamic acting fine moderate ∼1–1000 <1–100 (iii) anthropogenic influences connectivity, including actions disrupt enhance natural experienced fish. 2. We outline eight challenges role ecology, organized under foci: addressing constraints river structure; embracing temporal complexity connectivity; managing fishes. Challenges include structure stream networks, force direction flow, scale‐dependence shifting boundaries, behaviour life histories quantifying influence aligning management goals. As discuss each challenge, relevant approaches literature provide additional suggestions improving 3. Specifically, suggest rapid advances possible following arenas: incorporating network discharge into analyses; increasing explicit consideration scope parsing degrees defining acceptable alterations. Multiscale analyses most likely dominant patterns disconnections, appropriate at focus activities.

Language: Английский

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Inter‐disciplinary perspectives on processes in the hyporheic zone

Ecohydrology, Journal Year: 2010, Volume and Issue: 4(4), P. 481 - 499

Published: Nov. 26, 2010

Abstract The interface between groundwater and surface water within riverine/riparian ecosystems—the hyporheic zone (HZ)—is experiencing a rapid growth of research interest from range scientific disciplines, often with different perspectives. majority the multi‐disciplinary aims to elucidate HZ process dynamics their importance for ecohydrology biogeochemical cycling. This paper presents critical inter‐disciplinary review recent advances centred on highlights current state knowledge regarding hydrological, ecohydrological understanding. spatial temporal variability exchange (hyporheic flows), cycling heat (thermal regime) are considered in relation both experimental measurements modelling these phenomena. We explore how this has helped increase our understanding ecohydrology, particularly its invertebrate community, processing organic matter, trophic cascading ecosystem engineering by macrophytes other organisms across scales. In addition providing detailed functions, we present an perspective advance integrate traditional discipline boundaries. therefore attempt highlight gaps needs individual disciplines demonstrate innovations research, made subject‐specific boundaries (e.g. hydrology, biochemistry ecology), can be used enhance progress cross‐system comparisons fostering greater dialogue disciplines. Copyright © 2010 John Wiley & Sons, Ltd.

Language: Английский

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The river as a chemostat: fresh perspectives on dissolved organic matter flowing down the river continuum

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2015, Volume and Issue: 72(8), P. 1272 - 1285

Published: April 16, 2015

A better understanding is needed of how hydrological and biogeochemical processes control dissolved organic carbon (DOC) concentrations matter (DOM) composition from headwaters downstream to large rivers. We examined a DOM dataset the National Water Information System US Geological Survey, which represents approximately 100 000 measurements DOC concentration at many sites along rivers across United States. Application quantile regression revealed tendency towards spatial temporal homogenization shift dominance aromatic in more aliphatic downstream. The concentration–discharge (C-Q) relationships each site slope zero. propose that despite complexities river networks have driven revisions River Continuum Concept, show chemostasis (C-Q zero) because hydrologic drivers connect terrestrial sources streams instream near-stream result preferential losses gains DOM.

Language: Английский

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Groundwater-surface water interactions: New methods and models to improve understanding of processes and dynamics

Advances in Water Resources, Journal Year: 2010, Volume and Issue: 33(11), P. 1291 - 1295

Published: Oct. 2, 2010

Language: Английский

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Where Carbon Goes When Water Flows: Carbon Cycling across the Aquatic Continuum

Frontiers in Marine Science, Journal Year: 2017, Volume and Issue: 4

Published: Jan. 31, 2017

The purpose of this review is to highlight progress in unraveling carbon cycling dynamics across the continuum landscapes, inland waters, coastal oceans, and atmosphere. Earth systems are intimately interconnected, yet most biogeochemical studies focus on specific components isolation. movement water drives cycle, and, as such, waters provide a critical intersection between terrestrial marine biospheres. Inland, estuarine, well studied regions near centers human population Northern hemisphere. However, many world's large river their receiving remain poorly characterized, particularly tropics, which contribute disproportionately fraction transformation organic matter dioxide, Arctic, where positive feedback mechanisms likely amplify global climate change. There gaps current coverage environmental observations along aquatic continuum. For example, tidally-influenced reaches major rivers near-shore around plumes often left out budgets due combination methodological constraints poor data coverage. We suggest that closing these could potentially alter estimates CO2 outgassing from surface atmosphere by several-fold. Finally, order identify constrain/embrace uncertainties budget estimations it important we further adopt statistical modeling approaches have become well-established fields oceanography paleoclimatology, for example.

Language: Английский

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

Geomorphology, Journal Year: 2016, Volume and Issue: 277, P. 133 - 144

Published: Sept. 14, 2016

Language: Английский

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Groundwater and Surface Water Interaction at the Regional-scale – A Review with Focus on Regional Integrated Models

Water Resources Management, Journal Year: 2015, Volume and Issue: 30(1), P. 1 - 32

Published: Nov. 4, 2015

Scientists and practitioners agree that integrated water resource management is necessary, with an increasing need for research at the regional scale (103 to 105 km2). At this interactions between environmental human systems are fully developed global change linked local actions. The groundwater-surface interaction (GW-SW) of particular interest. Herein we review scientific journal literature examine GW-SW scale. We briefly all existing on GW-SW, then summarise its characteristics different scales identify specific challenges explore whether should be treated differently scales. Regional rarely examined in experimental field studies, which almost exclusively cover small areas. However, often integral large coupled models. Thus, collate information about models their applications. Fully coupled, physics-based have great potential meet technical challenges. limited data availability hampers application complex loosely schemes more widely applied. Many modelling concepts been published, but none applied a wide range settings. it impossible compare performance approaches. Comparative analyses context geographic conditions needed. Unfortunately, peer-reviewed no longer provides representative picture subject as becoming "too big published" or too pragmatic.

Language: Английский

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