Article
Biodiversity Conservation
Christian G. Westwood, Judy England, Chloe Hayes, Tim Johns, Rachel Stubbington
Summary: Temporary streams are common in global river networks, and a Plant Flow Index (PFI) has been developed to assess plant community responses to changing habitat conditions in these ecosystems. The PFI establishes relationships between common aquatic, semi-aquatic and terrestrial taxa and the proportion of time the channel was dry, providing a flexible tool for tracking ecological responses to intermittence across different regions and river types. Compared to other plant assessment methods, the PFI demonstrates a stronger ability to reflect the effects of intermittent flow and drying events.
ECOLOGICAL INDICATORS
(2021)
Review
Marine & Freshwater Biology
Veronica Ferreira, Manuel A. S. Graca, Arturo Elosegi
Summary: Droughts have significant impacts on stream ecosystem functioning, particularly on the decomposition of litter. A meta-analysis of 50 studies showed that overall, drought reduced litter decomposition by 43%, affecting energy and matter fluxes in food webs. The magnitude of drought effects depended on factors such as drought type, decomposer community, climate, and litter identity, with stronger effects in severe drought conditions and certain stream characteristics.
Article
Geosciences, Multidisciplinary
Lluis Gomez-Gener, Andre R. Siebers, Maria Isabel Arce, Shai Arnon, Susana Bernal, Rossano Bolpagni, Thibault Datry, Giulia Gionchetta, Hans-Peter Grossart, Clara Mendoza-Lera, Vivien Pohl, Ute Risse-Buhl, Oleksandra Shumilova, Ourania Tzoraki, Daniel von Schiller, Alexander Weigand, Gabriele Weigelhofer, Dominik Zak, Annamaria Zoppini
Summary: Surface-groundwater interactions in intermittent rivers and ephemeral streams have significant impacts on biogeochemical processes, but further research is needed to understand the specific differences in various hydrological states.
EARTH-SCIENCE REVIEWS
(2021)
Article
Water Resources
Songyan Yu, Ryan M. Burrows, Margaret Shanafield, Mark J. Kennard
Summary: This study found that the water level in non-perennial streams recedes at a constant rate after streamflow ceases, which is often higher than that during low-flow periods. However, water-level recession rates vary significantly between different cease-to-flow periods and streams. Further research is needed to understand the factors influencing water-level recession rates for ungauged streams and identifying persistent aquatic refuges across river networks.
ADVANCES IN WATER RESOURCES
(2022)
Article
Computer Science, Artificial Intelligence
Lukasz Korycki, Bartosz Krawczyk
Summary: Continual learning from streaming data sources is popular due to the growing number of online tools and systems. Traditional offline algorithms are insufficient for dealing with dynamic and everlasting problems, and our proposed instance exploitation technique addresses the challenges of temporary non-stationary concepts and limited labeled instances.
PATTERN RECOGNITION
(2022)
Article
Limnology
Miriam Colls, Xisca Timoner, Carme Font, Vicenc Acuna, Sergi Sabater
Summary: The study found that the duration of nonflow periods significantly affects the pigment composition of stream biofilms, with longer and more severe nonflow periods leading to increased differences in pigment composition. The composition of pigments showed distinct differences under different flow conditions, and pigment fingerprints can reflect the biofilm's ability to resist water flow interruption and recover after water flow resumes.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Limnology
Kelley A. Fritz, Matt R. Whiles
Summary: Research has found that terrestrial insect inputs are the second largest subsidy for temporary ponds, but are often unaccounted for in similar studies. While larger ponds produce greater total fluxes to terrestrial habitats, smaller ponds are often more productive per unit area.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Laura E. Coulson, Eva Feldbacher, Beate Pitzl, Gabriele Weigelhofer
Summary: This study evaluated the response of temperate stream biofilms to intermittency by sampling different types of streams in Austria. The findings suggest that the history of intermittency does not affect the biofilm response to drought, while factors such as grain size, seasonal growth, and nutrient levels have a larger impact.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Chengyu Qian, Hui Wang
Summary: We have studied the impact of dawnside subauroral polarization stream (SAPS) and dawnside auroral polarization stream (DAPS) on ionospheric ion upflow in the Northern Hemisphere using four years of Defense Meteorological Satellite Program (DMSP) observations. The occurrence rate of DAPS is higher than that of dawnside SAPS. There is noticeable ion upflow in the topside ionosphere around the DAPS region. The effect of dawnside SAPS on vertical flow weakens with increased geomagnetic activity.
Article
Computer Science, Interdisciplinary Applications
M. M. Rahman
Summary: The proposed model integrates two transition mechanisms into the turbulence framework, improving the prediction of flow transition onset and completion. It offers substantial benefits in predictive capability and aligns well with existing data and models.
COMPUTERS & FLUIDS
(2023)
Article
Limnology
Andre R. Siebers, Amael Paillex, Christopher T. Robinson
Summary: Seasonal and flow intermittency variation influence the dietary choices of benthic macroinvertebrates in high-altitude Alpine streams. This study used stable isotope analysis to estimate the contribution of different food sources to the assimilated diets of macroinvertebrates, and found that their dietary choices vary across seasons and flow intermittency.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Marko Milisa, Rachel Stubbington, Thibault Datry, Nuria Cid, Nuria Bonada, Marina Sumanovic, Djuradj Milosevic
Summary: Intermittent rivers and ephemeral streams (IRES) are complex mosaics of lotic, lentic, and terrestrial habitats that support high biodiversity. Despite being poorly represented in routine monitoring programs, recent recognition of their considerable and increasing spatiotemporal extent is driving efforts to better include them in ecological status assessments. The study examines the response patterns of aquatic macroinvertebrates to flow intermittence across three European climatic regions, highlighting the need to adapt standard biotic indices for effective ecological status assessments in IRES.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Mechanics
M. Crialesi-Esposito, G. Boffetta, L. Brandt, S. Chibbaro, S. Musacchio
Summary: This study investigates the statistics of turbulence in emulsions of two immiscible fluids of the same density. The presence of the interface reduces the energy flux towards dissipative scales, and multiphase turbulence is more intermittent than single-phase turbulence.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Environmental Sciences
Nan Zhang, Guangxia Shang, Yang Dai, Yuan Zhang, Sen Ding, Xin Gao
Summary: Different biological groups show biased responses to environmental stressors on different scales. Selecting bioindicators based on pressure characteristics is crucial for accurately assessing ecological quality. Macroinvertebrates and fish show distinct responses to environmental stressors, with their indices recommended for biomonitoring programs, especially in plain rivers.
Article
Environmental Sciences
Ken Aho, Dewayne Derryberry, Sarah E. Godsey, Rob Ramos, Sara R. Warix, Samuel Zipper
Summary: Non-perennial streams have gained increasing attention from researchers, but there is a lack of suitable methods for measuring their hydrologic connectivity. In this study, the authors developed Bayesian statistical approaches to measure average active stream length and a new metric called average communication distance. They applied these methods to Murphy Creek in Idaho, USA and found significant increases in effective stream lengths due to flow rarity, as well as seasonal differences in both average stream length and average communication distance. The study highlights the unique perspectives provided by communication distance and demonstrates the usefulness of Bayesian approaches in analyzing non-perennial streams.
WATER RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Scott W. Bailey, Kevin J. McGuire, Donald S. Ross, Mark B. Green, Olivia L. Fraser
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Water Resources
Jingjing Chen, Kevin J. McGuire, Ryan D. Stewart
HYDROLOGICAL PROCESSES
(2020)
Article
Environmental Sciences
Raymond M. Lee, Kevin J. McGuire, Brian D. Strahm, Jennifer D. Knoepp, C. Rhett Jackson, Ryan D. Stewart
WATER RESOURCES RESEARCH
(2020)
Article
Soil Science
Olivia L. Fraser, Scott W. Bailey, Mark J. Ducey, Kevin J. McGuire
Article
Water Resources
John L. Campbell, Lindsey E. Rustad, Scott W. Bailey, Emily S. Bernhardt, Charles T. Driscoll, Mark B. Green, Peter M. Groffman, Gary M. Lovett, William H. McDowell, Kevin J. McGuire, Emma J. Rosi
Summary: The Hubbard Brook Experimental Forest was established in 1955 to study the impacts of logging on flooding and erosion. Through small watershed research, scientists have investigated element cycling and ecosystem responses to disturbances like forest management and air pollution. Early evidence of acid rain was found at the site, shaping policies for mitigation. New research at HBEF has shifted towards a more mechanistic understanding of ecosystem processes within watersheds.
HYDROLOGICAL PROCESSES
(2021)
Article
Environmental Sciences
E. A. Parker, S. B. Grant, Y. Cao, M. A. Rippy, K. J. McGuire, P. A. Holden, M. Feraud, S. Avasarala, H. Liu, W. C. Hung, M. Rugh, J. Jay, J. Peng, S. Shao, D. Li
Summary: This study explores the use of unsteady transit time distribution theory in modeling solute transport in biofilters and demonstrates its accuracy in reproducing breakthrough concentrations. The research shows that more than half of the water in storage at any given time is from the most recent storm, while the rest is a mixture of earlier storms.
WATER RESOURCES RESEARCH
(2021)
Article
Water Resources
Mark B. Green, Scott W. Bailey, John L. Campbell, Kevin J. McGuire, Amey S. Bailey, Timothy J. Fahey, Nina Lany, David Zietlow
Summary: Small catchments have served as indicators of forest ecosystem responses to changes in air quality and climate. The Hubbard Brook Experimental Forest has been monitoring water budgets and controls since 1956, showing a 30% increase in evapotranspiration starting in 2010. This increase was primarily due to increasing ET, as indicated by PET and subsurface storage indicators.
HYDROLOGICAL PROCESSES
(2021)
Article
Multidisciplinary Sciences
Gianluca Botter, Filippo Vingiani, Alfonso Senatore, Carrie Jensen, Markus Weiler, Kevin McGuire, Giuseppe Mendicino, Nicola Durighetto
Summary: The study reveals a general hierarchical structuring of river network dynamics, where temporary stream activation follows a fixed and repeatable sequence, with less persistent sections activating only when the most persistent ones are already flowing. This phenomenon aids in monitoring activities and enables the development of a mathematical framework to elucidate how climate affects temporal variations in stream length.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
L. H. Pardo, M. B. Green, S. W. Bailey, K. J. McGuire, W. H. McDowell
Summary: This study examines the source area of streamwater nitrate under different flow conditions and finds that the bedrock-controlled areas contribute the most to nitrate export during high flows. Understanding these long-term nitrate dynamics is crucial for nitrogen management.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Environmental Sciences
Nicola Durighetto, Veronica Mariotto, Francesca Zanetti, Kevin J. McGuire, Giuseppe Mendicino, Alfonso Senatore, Gianluca Botter
Summary: Despite their prevalence, temporary rivers have been relatively understudied. This study presents a probabilistic description for the dynamics of catchment discharge and the corresponding active network length using a hydrological model. The results show a structural relationship between streamflow and active length regimes in temporary rivers.
WATER RESOURCES RESEARCH
(2022)
Article
Water Resources
Joshua R. Benton, Kevin J. McGuire, Madeline E. Schreiber
Summary: This study investigated the relationship between shallow groundwater flow direction, surface topography, and subsurface topography in a headwater catchment, finding that the variability in flow direction is influenced by water table regimes and subsurface materials.
HYDROLOGICAL PROCESSES
(2022)
Review
Environmental Sciences
Paolo Benettin, Nicolas B. Rodriguez, Matthias Sprenger, Minseok Kim, Julian Klaus, Ciaran J. Harman, Ype van der Velde, Markus Hrachowitz, Gianluca Botter, Kevin J. McGuire, James W. Kirchner, Andrea Rinaldo, Jeffrey J. McDonnell
Summary: This study reviews the recent developments in water transit time research, focusing on water-age-balance approaches and data-based approaches. Various methods, including StorAge-Selection functions, well/partially mixed compartments, and direct transit time estimates, are discussed and compared. The study aims to unify the heterogeneity in the literature and highlight the remaining open questions in transit time research.
WATER RESOURCES RESEARCH
(2022)
Article
Education & Educational Research
John P. Gannon, Kevin J. McGuire
Summary: The concept of a water balance is important in hydrology classrooms, but students often struggle to fully understand its components, assumptions, and limitations. To address this issue, a web application was developed to run a Thornthwaite-type water balance at NOAA climate stations across the United States, allowing students to manipulate various parameters and explore different scenarios. Results from student surveys indicate that this approach may be more effective in teaching water balance concepts compared to traditional methods.
FRONTIERS IN EDUCATION
(2022)
Article
Forestry
Morgan L. Schulte, Daniel L. McLaughlin, Frederic C. Wurster, J. Morgan Varner, Ryan D. Stewart, W. Mike Aust, C. Nathan Jones, Bridget Gile
INTERNATIONAL JOURNAL OF WILDLAND FIRE
(2019)