Article
Geography, Physical
F. J. Magilligan, K. H. Nislow, J. T. Dietrich, H. Doyle, B. Kynard
Summary: Dam removal is an important tool for river restoration and provides an experimental design to quantify environmental responses. The study of a 6 m high dam removal in Massachusetts showed sustained effects on geomorphology and ecology, with immediate improvements in bed sediment size and upstream fish species richness. The response to dam removal in this system is generally applicable to small dam removals in upland catchments.
Article
Ecology
Qiang Li, Yuzhou Zhang, Ruolan Wang, Ling Chu, Yuru Li, Yunzhi Yan
Summary: Low-head dams have an impact on the classification homogenization and differentiation patterns of fish assemblages, leading to a decrease or increase in community distinctiveness. Population abundance plays a crucial role in determining the homogenization and differentiation of fish assemblages. Additionally, changes in taxonomic similarity cannot predict changes in functional similarity.
ECOLOGY AND EVOLUTION
(2022)
Article
Neurosciences
Evgeny J. Chumin, Joshua Faskowitz, Farnaz Zamani Esfahlani, Youngheun Jo, Haily Merritt, Jacob Tanner, Sarah A. Cutts, Maria Pope, Richard Betzel, Olaf Sporns
Summary: The study revealed an organized coupling between the subcortex and cortex, which may play a role in the cortical organization of primary sensorimotor/attention and heteromodal systems. The motif analysis of edge community triads was proposed as a promising method for investigating communication patterns in networks.
Article
Environmental Sciences
Rosemberg Fernandes Menezes, Jens-Christian Svenning, Hui Fu, Luc De Meester, Torben Linding Lauridsen, Martin Sondergaard, Jose Maria Conde-Porcuna, Erik Jeppesen
Summary: The beta diversity of lakes is influenced by natural factors, dispersal constraints, and human disturbances. Fish beta diversity tends to increase towards lower latitudes and is higher in less disturbed lakes at a local scale. However, environmental disturbances can impact these patterns due to community homogenization or heterogenization. Factors such as geographic distance and climate variability are the main drivers of fish community change across latitude, but the rate of change varies between lake types. Local factors like turbidity, lake size, and presence of exotic species also have varying effects on beta diversity across regions.
Article
Environmental Sciences
Virgilio Hermoso, Miguel Clavero, Ana Filipa Filipe
Summary: The study demonstrates how to prioritize the allocation of barrier removal projects using Marxan, a publicly available tool, based on mapping barriers and freshwater fish species to increase connectivity of populations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Marek Smejkal, Daniel Barton, Jindrich Duras, Pavel Horky, Milan Muska, Jan Kubecka, Nikola Pfauserova, Million Tesfaye, Ondrej Slavik
Summary: Most lotic ecosystems have been modified to serve human needs, such as building dams. Reservoirs have significant impacts on freshwater ecosystems and rheophilic fishes. Competition, predation, and the establishment of generalist species in altered river sections all affect the composition of rheophilic communities in tributaries. Identifying gaps in understanding mechanisms of fauna at habitat edges and conducting telemetry and trophic interaction studies are necessary for conservation efforts to protect rheophilic fish populations.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Martin A. Briggs, Phillip Goodling, Zachary C. Johnson, Karli M. Rogers, Nathaniel P. Hitt, Jennifer B. Fair, Craig D. Snyder
Summary: This study provides empirical support for the existing conceptual models of headwater stream disconnection by investigating the influence of local bedrock depth and sediment thickness on summer stream temperature and channel disconnection patterns.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Multidisciplinary Sciences
John M. Halley, Stuart L. Pimm
Summary: Loss of habitat can have various forms, such as habitat fragmentation and gradual decline of populations. Extinction debt, where species loss occurs after habitat loss, is not immediately apparent. This study investigates two mechanisms using a niche-oriented community model and reveals different patterns of extinction debt. Rapid initial loss of species followed by slower loss over time is observed in small fragments, while slow decline in population sizes initially leads to a low extinction rate that increases exponentially afterwards.
Article
Environmental Sciences
K. L. Korbel, H. Rutlidge, G. C. Hose, S. M. Eberhard, M. S. Andersen
Summary: The exchange between groundwater, hyporheic zone waters, and surface waters is crucial for water quality, quantity, and ecological health. Microbial communities in intermittent creeks were found to be sensitive indicators of fine-scale hydrologic changes and the importance of GW-SW exchange.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Damian H. Bubb, Kim Birnie-Gauvin, Jeroen S. Tummers, Kim Aarestrup, Niels Jepsen, Martyn C. Lucas
Summary: The removal of low-head barriers is effective in restoring lotic habitats and positively impacting fish density. However, the impact on fish communities can be more variable and is likely influenced by wider riverine processes.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Microbiology
Nathanael T. Bergbusch, Alicia R. Wong, Jennifer N. Russell, Vanessa J. Swarbrick, Claire Freeman, Jordyn Bergsveinson, Christopher K. Yost, Simon C. Courtenay, Peter R. Leavitt
Summary: Eutrophication can alter the composition and diversity of bacterial communities in water bodies. This study used 16S rRNA sequencing to compare bacterial assemblages before and after a biological nutrient removal (BNR) upgrade in a eutrophic prairie stream. The results showed that the upgrade reduced bacterial diversity and mitigated symptoms of cultural eutrophication in the microbial communities.
FEMS MICROBIOLOGY ECOLOGY
(2023)
Article
Biodiversity Conservation
Gustavo Diaz, Konrad Gorski, Aliro Manosalva, Barbara Toledo, Evelyn Habit
Summary: Longitudinal connectivity is crucial for maintaining river ecosystems and aquatic biota, but its loss can lead to declines in fish abundance and local extinctions, resulting in changes in local assemblage structure and higher dissimilarity among local assemblages. This study in Chile assessed the effects of fragmentation and local environmental variables on fish diversity patterns, revealing that fragmented basins had lower species richness and alpha diversity in pool habitats due to the absence of fish species with high dispersion capacities. The findings emphasize the importance of considering barrier cascades and biodiversity indicators at both local and basin scales in sustainable hydropower development.
Article
Environmental Sciences
Anna M. Lavelle, Michael A. Chadwick, Daniel D. A. Chadwick, Eleri G. Pritchard, Nicolas R. Bury
Summary: The study showed that urban streams face pressures such as geomorphological alterations, hydrological disconnectivity, and water pollution. River restoration projects can increase fish density and biomass, but do not necessarily have a significant impact on community structure.
Article
Biodiversity Conservation
Sam Wenaas Perrin, Bert van der Veen, Nick Golding, Anders Gravbrot Finstad
Summary: Estimating changes in community composition through Species Distribution Models is important for managing the impacts of global climate change on species distributions. This study focused on freshwater ecosystems and found a trend of associations between species based on their temperature tolerances, with warmer-tolerant species dominating future community compositions. The model implemented provides a starting point for understanding climate-driven community trends and potential local extinctions.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Ecology
Michael J. Bottery, Jessica L. Matthews, A. Jamie Wood, Helle Krogh Johansen, Jon W. Pitchford, Ville-Petri Friman
Summary: The study found that multidrug-resistant Stenotrophomonas maltophilia can provide high levels of antibiotic protection to Pseudomonas aeruginosa, but is ineffective against another antibiotic. The level of exposure protection against different carbapenems is determined by differences in antibiotic efficacy and inactivation rate.
Article
Biology
Bridget R. Deemer, John A. Harrison, Siyue Li, Jake J. Beaulieu, Tonya Delsontro, Nathan Barros, Jose F. Bezerra-Neto, Stephen M. Powers, Marco A. dos Santos, J. Arie Vonk
Review
Ecology
Stephanie E. Hampton, Aaron W. E. Galloway, Stephen M. Powers, Ted Ozersky, Kara H. Woo, Ryan D. Batt, Stephanie G. Labou, Catherine M. O'Reilly, Sapna Sharma, Noah R. Lottig, Emily H. Stanley, Rebecca L. North, Jason D. Stockwell, Rita Adrian, Gesa A. Weyhenmeyer, Lauri Arvola, Helen M. Baulch, Isabella Bertani, Larry L. Bowman, Cayelan C. Carey, Jordi Catalan, William Colom-Montero, Leah M. Domine, Marisol Felip, Ignacio Granados, Corinna Gries, Hans-Peter Grossart, Juta Haberman, Marina Haldna, Brian Hayden, Scott N. Higgins, Jeff C. Jolley, Kimmo K. Kahilainen, Enn Kaup, Michael J. Kehoe, Sally MacIntyre, Anson W. Mackay, Heather L. Mariash, Robert M. Mckay, Brigitte Nixdorf, Peeter Noges, Tiina Noges, Michelle Palmer, Don C. Pierson, David M. Post, Matthew J. Pruett, Milla Rautio, Jordan S. Read, Sarah L. Roberts, Jacqueline Ruecker, Steven Sadro, Eugene A. Silow, Derek E. Smith, Robert W. Sterner, George E. A. Swann, Maxim A. Timofeyev, Manuel Toro, Michael R. Twiss, Richard J. Vogt, Susan B. Watson, Erika J. Whiteford, Marguerite A. Xenopoulos
Review
Engineering, Environmental
Katrina A. Macintosh, Brooke K. Mayer, Richard W. McDowell, Stephen M. Powers, Lawrence A. Baker, Treavor H. Boyer, Bruce E. Rittmann
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Ecology
Stephen M. Powers, Stephanie E. Hampton
ECOLOGICAL APPLICATIONS
(2019)
Article
Environmental Sciences
S. M. Powers, R. B. Chowdhury, G. K. MacDonald, G. S. Metson, A. H. W. Beusen, A. F. Bouwman, S. E. Hampton, B. K. Mayer, M. L. McCrackin, D. A. Vaccari
Article
Engineering, Environmental
Alexander K. Fremier, Katherine M. Strickler, Joseph Parzych, Stephen Powers, Caren S. Goldberg
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Green & Sustainable Science & Technology
Bidhan Bhuson Roy, Rubel Biswas Chowdhury, Amit Robert Baroi, Shupa Rahman, Stephen M. Powers, Nick Milne, Mohammad Sujauddin
JOURNAL OF INDUSTRIAL ECOLOGY
(2019)
Article
Engineering, Environmental
David A. Vaccari, Stephen M. Powers, Xin Liu
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Review
Engineering, Environmental
Michael F. Meyer, Stephen M. Powers, Stephanie E. Hampton
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Environmental Sciences
E. Cavaliere, I. B. Fournier, V. Hazukova, G. P. Rue, S. Sadro, S. A. Berger, J. B. Cotner, H. A. Dugan, S. E. Hampton, N. R. Lottig, B. C. McMeans, T. Ozersky, S. M. Powers, M. Rautio, C. M. O'Reilly
Summary: Millions of lakes worldwide experience the formation of lake ice during winter, impacting the transfer of energy, redox processes, and ecological community structure. However, there is a lack of understanding about how these effects vary in response to different winter climate conditions. Global climate change is driving ice-covered lakes towards warmer temperatures and reduced ice cover, emphasizing the need to understand the role of winter in the annual aquatic cycle.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Editorial Material
Environmental Sciences
James B. Cotner, Stephen M. Powers, Steven Sadro, Diane McKnight
Summary: Our changing climate is affecting freshwater ecosystems, particularly in winter. Lakes, wetlands, and rivers at high latitudes are experiencing shorter periods of ice cover, while lower latitudes systems are seeing open water conditions throughout the winter. These changes impact gas exchange, metabolism, and other processes in the water. There is a need for further research to understand the effects of changing winters on freshwater systems.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Limnology
Stephen M. Powers, Steven C. Fradkin, William Baccus, Carmen Archambault, John R. Boetsch, Matthew R. Brousil, Rebecca Lofgren, Ashley Rawhouser, Stephanie E. Hampton
Summary: The study found that changes in spring snowpack and ice-out dates in mountain lakes have significant impacts on lake ecosystems, with lakes experiencing warmer and more turbid conditions in years with less snowpack and colder and clearer conditions with more snowpack. These findings highlight the complex interactions between snowpack variability and mountain lake ecology.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Limnology
Nicole D. Wagner, Felicia S. Osburn, Caleb J. Robbins, Mark R. Ernst, Jennifer Owens, Stephen M. Powers, J. Thad Scott
Summary: High-frequency water quality monitoring is increasing in importance in freshwater research and management. This study focuses on a eutrophic reservoir in North Texas, examining the impact of environmental parameters on water column stability and dissolved oxygen dynamics. The researchers used an autonomous water quality monitoring profiler to collect data on temperature, dissolved oxygen, and other variables over a period of several months. They found that dissolved oxygen levels were highly dynamic, with implications for biogeochemical cycles in the reservoir.
Article
Environmental Sciences
S. M. Powers, H. M. Baulch, S. E. Hampton, S. G. Labou, N. R. Lottig, E. H. Stanley
Article
Limnology
S. M. Powers, S. G. Labou, H. M. Baulch, R. J. Hunt, N. R. Lottig, S. E. Hampton, E. H. Stanley
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2017)