Review
Limnology
Denise J. B. Swanborn, Veerle A. Huvenne, Simon J. Pittman, Lucy C. Woodall
Summary: Seascape ecology is a new pattern-oriented and integrative science that focuses on quantifying ecological patterns in the sea and linking spatial patterns to biodiversity and ecological processes. It provides a framework for understanding and managing marine ecosystems by generating new scientific insights at relevant spatial and temporal scales.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Kuai Fang, Daniel Kifer, Kathryn Lawson, Dapeng Feng, Chaopeng Shen
Summary: Traditionally, statistical models in geoscientific disciplines like hydrology are built separately for different regions. However, in the era of big data and deep learning, it is often more beneficial to compile a large and heterogeneous dataset and compare it to a local model. This is because deep learning models can accommodate different training instances and learn both similarities and differences between regions, resulting in improved performance. This phenomenon is called the "data synergy effect" and has implications for climate change impact assessment.
WATER RESOURCES RESEARCH
(2022)
Article
Limnology
Amy M. Marcarelli, Robinson W. Fulweiler, J. Thad Scott
Summary: Nitrogen fixation is a crucial element of the global nitrogen cycle, but its rates and ecological dynamics in inland and coastal aquatic ecosystems are still largely unknown. This is due to the diversity of these habitats and the traditional belief that nitrogen fixation rates in these ecosystems are low or non-existent.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Limnology
Hassan Elagami, Pouyan Ahmadi, Jan H. Fleckenstein, Sven Frei, Martin Obst, Seema Agarwal, Benjamin S. Gilfedder
Summary: This study evaluated the settling velocities, particle distributions, and residence times of microplastic particles in lakes using experiments and model calculations. The size of the particles and the depth of the lake layer were identified as the main factors influencing the residence times. It was found that the settling velocity of microplastic particles did not significantly vary between pristine and colonized particles. The results suggest that there is a high probability of small microplastic particles being taken up by lake organisms due to their long residence times.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Engineering, Environmental
Mojolaoluwa Ladipo-Obasa, Nicole Forney, Rumana Riffat, Charles Bott, Christine DeBarbadillo, Haydee De Clippeleir
Summary: This study examines the feasibility of using raw fermentate for mainstream partial denitrification-anammox (PdNA) in an integrated fixed-film activated sludge (IFAS) process. The research finds that PdNA selection can be achieved even with low-quality fermentate and identifies nitrate residual as a key factor in PdNA efficiency. The study also highlights the potential for significant savings in methanol and reduced carbon footprint by integrating PdNA upstream from polishing aeration and anoxic zones.
WATER ENVIRONMENT RESEARCH
(2022)
Review
Environmental Sciences
A. Garzon, Z. Kapelan, J. Langeveld, R. Taormina
Summary: Surrogate models, or metamodels, are increasingly being used in water engineering to replace computationally expensive simulations. However, current metamodels suffer from issues such as curse of dimensionality, lack of explainability, and rigid architecture. To tackle these issues, recent advancements in machine learning, such as inductive biases and robustness, should be applied. Additionally, neural network architectures that extend deep learning methods to graph data structures show promise in advancing surrogate modeling. Furthermore, future research should focus on complex applications and the development of benchmark datasets for realistic complex networks.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Tamanna Kabir, Yadu Pokhrel, Farshid Felfelani
Summary: This study examines the impact of precipitation uncertainty on hydrological simulations in the Mekong River Basin using the Community Land Model. The results show that precipitation is a key factor in simulating streamflow and that the choice of precipitation data directly affects flood pulse simulations. The study also reveals differences in simulating soil moisture and evapotranspiration using different precipitation products.
WATER RESOURCES RESEARCH
(2022)
Article
Limnology
Louis Astorg, Jean-Christophe Gagnon, Cassandre S. Lazar, Alison M. Derry
Summary: Freshwater salinization is a widespread issue, but there is limited evidence on the ecological effects it has on aquatic communities. In this study, we found that salinity had a significant impact on the diversity, composition, and abundance of plankton communities, with different salt concentrations leading to the dominance of different phytoplankton groups.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Environmental Sciences
Erhu Du, Yong Tian, Ximing Cai, Yi Zheng, Feng Han, Xin Li, Mohan Zhao, Yi Yang, Chunmiao Zheng
Summary: This study proposes a distributed policy design scheme for conjunctive surface water-groundwater management in large river basins. A fully integrated modeling framework is developed to tightly couple water policies, water use, and hydrological processes. The findings from the application of this framework to the Heihe River Basin show that distributed water policies can improve hydrological outcomes and identify hydrological externality effects.
WATER RESOURCES RESEARCH
(2022)
Article
Limnology
Sabine Hilt, Hans-Peter Grossart, Daniel F. McGinnis, Frank Keppler
Summary: Methane emissions from aquatic ecosystems, which contribute to about half of total global methane emissions, were traditionally attributed to methanogenic archaea in anoxic or suboxic conditions. However, recent studies have shown evidence of methane production in aerobic conditions in freshwater, brackish, and marine habitats. The role of submerged macrophytes in methane production in oxic waters has been largely overlooked, despite their presence in littoral zones of ponds, lakes, and coastal systems. Understanding the contribution of submerged macrophytes to methane emissions is crucial for estimating global methane emissions from aquatic ecosystems and improving our understanding of spatial and temporal dynamics of methane emissions.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Yuxuan Hou, Jie Yang, Christopher J. Russoniello, Tianyuan Zheng, Mei-lin Wu, Xuan Yu
Summary: Shrimp aquaculture can lead to groundwater salinization and increased submarine groundwater discharge (SGD), but research on this topic is limited. In this study, a numerical simulation approach was used to assess the impacts of shrimp farm irrigation on groundwater salinization and SGD. The results showed that pond water depth had a primary control on the mass of saltwater infiltration, while farm width had a primary control on recovery rate. Both pond water salinity and depth affected fresh and saline SGD. This study highlights the previously unrecognized mechanism of aquaculture on coastal aquifer vulnerability and SGD, emphasizing the need for further research on the impact of aquaculture on coastal groundwater resources.
WATER RESOURCES RESEARCH
(2022)
Article
Limnology
Fredrik Ryderheim, Josephine Gronning, Thomas Kiorboe
Summary: The diatom frustule partially protects against copepod grazing. Thick-shelled diatoms are more frequently rejected by copepods than thin-shelled diatoms, regardless of cell size. The longer handling time of thick-shelled cells of larger diatoms limits phytoplankton consumption. This may be why many diatoms can reach high concentrations even in the presence of dense grazers.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Environmental Sciences
R. L. Knox, R. R. Morrison, E. E. Wohl
Summary: This study successfully predicted the location and distribution of artificial levees in the contiguous United States using geomorphic, land cover, and spatial variables, as well as machine learning and logistic models. The national levee database was found to represent only 20.4% of the total length of levees.
WATER RESOURCES RESEARCH
(2022)
Review
Limnology
John J. Gilbert
Summary: The diverse diets of common planktonic rotifers are described in detail, categorizing them into four broad food niches based on the types and sizes of food ingested. This information is important for understanding population dynamics, food webs, species diversity, and potential resource competition among planktonic organisms.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Lyubov E. Burlakova, Alexander Y. Karatayev, Allison R. Hrycik, Susan E. Daniel, Knut Mehler, Lars G. Rudstam, James M. Watkins, Ronald Dermott, Jill Scharold, Ashley K. Elgin, Thomas F. Nalepa
Summary: The Laurentian Great Lakes have undergone significant anthropogenic changes, including the introduction of invasive species, resulting in transformations of the benthic community of Lake Ontario over the past century. The dominance and proliferation of quagga mussels, driven by the introduction of invasive dreissenids, has led to the disappearance of native species and a shift towards a community dominated by quagga mussels and Oligochaeta.
JOURNAL OF GREAT LAKES RESEARCH
(2022)
Article
Fisheries
F. Sheldon, D. Barma, L. J. Baumgartner, N. Bond, S. M. Mitrovic, R. Vertessy
Summary: The study examined three significant fish death events that occurred in the Lower Darling River, Australia, from late 2018 to early 2019, attributing the causes to extreme hot and dry climate conditions, stratification and hypoxia in weir pools, and broader climatic, hydrological, and basin management contexts. The observations have implications for future river management, with suggestions made for policy makers and river operators to minimize fish death risks.
MARINE AND FRESHWATER RESEARCH
(2022)
Article
Environmental Sciences
W. J. Hahm, D. N. Dralle, M. Sanders, A. B. Bryk, K. E. Fauria, M. H. Huang, B. Hudson-Rasmussen, M. D. Nelson, M. A. Pedrazas, L. Schmidt, J. Whiting, W. E. Dietrich, D. M. Rempe
Summary: This study investigates the dynamics of water storage in bedrock and its implications for water availability and groundwater recharge. The findings show that in wet years, bedrock quickly replenishes water storage and recharges groundwater, while in drought years, water storage declines, resulting in water stress for woody plants.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
C. Winter, L. Tarasova, S. R. Lutz, A. Musolff, R. Kumar, J. H. Fleckenstein
Summary: Runoff events are important for nitrate export, but there is high variability between events and catchments, making it difficult to identify the dominant drivers. This study investigates the relationship between event characteristics and nitrate export patterns in six neighboring catchments. The results show that low-magnitude rainfall events with dry antecedent conditions have the lowest nitrate concentrations and loads, while high-magnitude rainfall or snowmelt events have the highest concentrations and loads. These findings suggest that understanding event characteristics can help explain variability in nitrate export.
WATER RESOURCES RESEARCH
(2022)
Article
Limnology
Peter J. S. Franks, Bryce G. Inman, Jennifer A. MacKinnon, Matthew H. Alford, Amy F. Waterhouse
Summary: Analysis of turbulence climate in the ocean based on over one million measurements reveals that most turbulence levels experienced by plankton are relatively weak, allowing them to swim past and chemical plumes to persist for some time. This underscores the importance of planktonic behavior in individual interactions.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Limnology
Adam C. Martiny, George Hagstrom, Tim DeVries, Robert T. Letscher, Gregory L. Britten, Catherine A. Garcia, Eric Galbraith, David Karl, Simon A. Levin, Michael W. Lomas, Allison R. Moreno, David Talmy, Weilei Wang, Katsumi Matsumoto
Summary: The rising temperature, surface stratification, and decreasing nutrient inputs in the oceans are expected to cause the expansion of warm, nutrient-depleted ecosystems, negatively affecting phytoplankton biomass, primary productivity, and carbon export. However, diverse phytoplankton communities have adaptive potential that may render them resilient to global changes.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
