Journal ArticleDOI
Inter-disciplinary perspectives on processes in the hyporheic zone
Stefan Krause,David M. Hannah,Jan H. Fleckenstein,C. H. Heppell,Daniel Kaeser,Roger W. Pickup,Gilles Pinay,Anne L. Robertson,Paul J. Wood +8 more
TLDR
A critical inter-disciplinary review of recent advances of research centred on the hyporheic zone (HZ) and highlights the current state of knowledge regarding hydrological, biogeochemical and ecohydrological process understanding is presented in this article.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 a range of scientific disciplines, often with different perspectives. The majority of the multi-disciplinary research aims to elucidate HZ process dynamics and their importance for surface water and groundwater ecohydrology and biogeochemical cycling. This paper presents a critical inter-disciplinary review of recent advances of research centred on the HZ and highlights the current state of knowledge regarding hydrological, biogeochemical and ecohydrological process understanding. The spatial and temporal variability of surface water and groundwater exchange (hyporheic exchange flows), biogeochemical cycling and heat exchange (thermal regime) are considered in relation to both experimental measurements and modelling of these phenomena. We explore how this knowledge has helped to increase our understanding of HZ ecohydrology, and particularly its invertebrate community, the processing of organic matter, trophic cascading and ecosystem engineering by macrophytes and other organisms across a range of spatial and temporal scales. In addition to providing a detailed review of HZ functions, we present an inter-disciplinary perspective on how to advance and integrate HZ process understanding across traditional discipline boundaries. We therefore attempt to highlight knowledge gaps and research needs within the individual disciplines and demonstrate how innovations and advances in research, made within traditional subject-specific boundaries (e.g. hydrology, biochemistry and ecology), can be used to enhance inter-disciplinary scientific progress by cross-system comparisons and fostering of greater dialogue between scientific disciplines.read more
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BookDOI
The Biology of Caves and Other Subterranean Habitats
David C. Culver,Tanja Pipan +1 more
TL;DR: The Biology of Caves and other Subterranean Habitats offers a concise but comprehensive introduction to cave ecology and evolution and more than 650 references, 150 of which are new since the first edition, provide many entry points to the research literature.
Journal ArticleDOI
Groundwater–surface water mixing shifts ecological assembly processes and stimulates organic carbon turnover
James C. Stegen,James K. Fredrickson,Michael J. Wilkins,Allan E. Konopka,William C. Nelson,Evan V. Arntzen,William B. Chrisler,Rosalie K. Chu,Robert E. Danczak,Sarah J. Fansler,David W. Kennedy,Charles T. Resch,Malak M. Tfaily +12 more
TL;DR: In this paper, the coupling among groundwater-surface water mixing, microbial communities and biogeochemistry was investigated using DNA sequencing and ultra-high-resolution organic carbon profiling to investigate the coupling between groundwater and surface water mixing in the hyporheic zone.
Groundwater-Surface Water Mixing Shifts Ecological Assembly Processes and Stimulates Organic Carbon Turnover
James C. Stegen,James K. Fredrickson,Michael J. Wilkins,Allan E. Konopka,William C. Nelson,Evan V. Arntzen,William B. Chrisler,R. K. Chu,B. Danczak,Sarah J. Fansler,David W. Kennedy,T. Resch,Malak M. Tfaily +12 more
TL;DR: Groundwater–surface water mixing in the hyporheic zone stimulates heterotrophic respiration, alters organic carbon composition, causes ecological processes to shift from stochastic to deterministic and is associated with elevated abundances of microbial taxa that may degrade a broad suite of organic compounds.
Journal ArticleDOI
Transit times – the link between hydrology and water quality at the catchment scale
Markus Hrachowitz,Paolo Benettin,Boris M. van Breukelen,Ophélie Fovet,Nicholas J K Howden,Laurent Ruiz,Ype van der Velde,Andrew J. Wade +7 more
TL;DR: In this article, a non-technical overview of the importance of hydrology-controlled transport through catchment systems as the link between hydrology and water quality is provided. But the authors do not consider the impact of transit times on the quality of the model.
Journal ArticleDOI
Multiscale geophysical imaging of the critical zone
TL;DR: The application of geophysical methods to map the geometry of structural features such as regolith thickness, lithological boundaries, permafrost extent, snow thickness, or shallow root zones is discussed in this article.
References
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Journal ArticleDOI
Biogeochemical Hot Spots and Hot Moments at the Interface of Terrestrial and Aquatic Ecosystems
Michael E. McClain,Elizabeth W. Boyer,C. Lisa Dent,Sarah E. Gergel,Nancy B. Grimm,Peter M. Groffman,Stephen C. Hart,Judson W. Harvey,Carol A. Johnston,Emilio Mayorga,William H. McDowell,Gilles Pinay +11 more
TL;DR: In this paper, the authors define biogeochemical hot spots as patches that show disproportionately high reaction rates relative to the surrounding matrix, whereas hot moments occur when episodic hydrological flowpaths reactivate and/or mobilize accumulated reactants.
Journal ArticleDOI
The ecological significance of exchange processes between rivers and groundwater
Matthias Brunke,Tom Gonser +1 more
TL;DR: The hyporheic corridor concept emphasizes connectivity and interactions between subterranean and surface flow on an ecosystem level for floodplain rivers as mentioned in this paper, which is a complementary concept to others which focus on surficial processes in the lateral and longitudinal dimensions.
Journal ArticleDOI
Stream denitrification across biomes and its response to anthropogenic nitrate loading
Patrick J. Mulholland,Patrick J. Mulholland,Ashley M. Helton,Geoffrey C. Poole,Robert O. Hall,Stephen K. Hamilton,Bruce J. Peterson,Jennifer L. Tank,Linda R. Ashkenas,Lee W. Cooper,Clifford N. Dahm,Walter K. Dodds,Stuart E. G. Findlay,Stanley V. Gregory,Nancy B. Grimm,Sherri L. Johnson,William H. McDowell,Judy L. Meyer,H. Maurice Valett,Jackson R. Webster,Clay P. Arango,Jake J. Beaulieu,Jake J. Beaulieu,Melody J. Bernot,Amy J. Burgin,Chelsea L. Crenshaw,Laura T. Johnson,B. R. Niederlehner,Jonathan M. O'Brien,Jody D. Potter,Richard W. Sheibley,Richard W. Sheibley,Daniel J. Sobota,Daniel J. Sobota,Suzanne M. Thomas +34 more
TL;DR: It is demonstrated that excess nitrate in streams elicits a disproportionate increase in the fraction of nitrate that is exported to receiving waters and reduces the relative role of small versus large streams as nitrate sinks.
Journal ArticleDOI
The functional significance of the hyporheic zone in streams and rivers
TL;DR: The hyporheic corridor concept describes gradients at the catchment scale, extending to alluvial aquifers kilometers from the main channel as discussed by the authors, which is an active ecotone between the surface stream and groundwater.
Journal ArticleDOI
An ecosystem perspective of alluvial rivers: connectivity and the hyporheic corridor
Jack A. Stanford,James V. Ward +1 more
TL;DR: In this article, the authors show that large-scale (km 3 ) hyporheic zones contain speciose food webs, including specialized insects with hypogean and epigean life history stages (amphibionts) and obligate groundwater species (stygobionts).
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