Cyanotoxin mixture models: Relating environmental variables and toxin co-occurrence to human exposure risk
Victoria Christensen, Erin A. Stelzer, Barbara C. Scudder Eikenberry, Hayley T. Olds, Jaime F. LeDuc, Ryan P. Maki, Jack E. Norland, Eakalak Khan
2021, Journal of Hazardous Materials (415)
Toxic cyanobacterial blooms, often containing multiple toxins, are a serious public health issue. However, there are no known models that predict a cyanotoxin mixture (anatoxin-a, microcystin, saxitoxin). This paper presents two cyanotoxin mixture models (MIX) and compares them to two microcystin (MC) models from data collected in 2016–2017 from three...
Simulation of dissolved organic carbon flux in the Penobscot Watershed, Maine
Shabnam Rouhani, Crystal B. Schaaf, Thomas G. Huntington, Janet Choate
2021, Ecohydrology & Hydrobiology (21) 256-270
Dissolved organic carbon (DOC) is an important component of the carbon cycle as a measure of the hydrological transport of carbon between terrestrial carbon pools into soil pools and eventually into streams. As a result, changes in DOC in rivers and streams may indicate alterations in the storage of terrestrial...
Population density, distribution, and trends of landbirds in the National Park of American Samoa, Ta‘ū and Tutuila Units (2011–2018)
Seth Judge, Richard J. Camp, Visa Vaivai, Patrick J. Hart
2021, Report
The National Park of American Samoa (NPSA) was surveyed for landbirds from June through July, 2018. Surveys were conducted using point-transect distance sampling methods to estimate bird densities. This information provides the second datum in the time-series of landbird monitoring for long-term trends in landbird distribution, density, and abundance within...
The making of the NEAM Tsunami Hazard Model 2018 (NEAMTHM18)
Roberto Basili, Beatriz Brizuela, Andre Herrero, Sarfraz Iqbal, Stefano Lorito, Francesco Emanuele Maesano, Shane Murphy, Paolo Perfetti, Fabrizio Romano, Antonio Scala, Jacopo Selva, Matteo Taroni, Mara Monica Tiberti, Hong Kie Thio, R. Tonini, Manuela Volpe, Sylfest Glimsdal, Carl B. Harbitz, Finn Lovholt, Maria Ana Baptista, Fernando Carrilho, Luis M. A. Matias, Rachid Omira, Andrey Babeyko, Andreas Hoechner, Mucahit Gurbuz, Onur Pekcan, A. Yalciner, Miquel Canals, Galderic Lastras, Apostolos Agalos, Gerassimo Papadapoulos, Ioanna Triantafyllou, Sabah Benchekroun, Hedi Agrebi Jaouadi, Samir Ben Abdallah, Atef Bouallegue, Hassene Hamdi, Foued Oueslati, A. Amato, Alberto Armigliato, Jorn Behrens, Gareth Davies, Daniela Di Bucci, Mauro Dolce, Eric L. Geist, Jose Manuel Gonzalez Vida, Mauricio Gonzalez, Jorges Macias Sanchez, C. Meletti, Ceren Ozer Sozdinler, Marco Pagani, Tom Parsons, Jascha Polet, William Power, Mathilde B. Sorensen, Andrey Zaytsev
2021, Frontiers in Earth Science (8)
The NEAM Tsunami Hazard Model 2018 (NEAMTHM18) is a probabilistic hazard model for tsunamis generated by earthquakes. It covers the coastlines of the North-eastern Atlantic, the Mediterranean, and connected seas (NEAM). NEAMTHM18 was designed as a three-phase project. The first two phases were dedicated to the model development...
The role of surges during periods of very shallow water on sediment transport over tidal flats
Qian Zhang, Zheng Gong, Changkuan Zhang, Jessica R. Lacy, Bruce E. Jaffe, Beibei Xu, Xindi Chen
2021, Frontiers in Marine Science (8)
Periods of very shallow water (water depth in the order of 10 cm) occur daily on tidal flats because of the propagation of tides over very gently sloping beds, leading to distinct morphodynamical phenomena. To improve the understanding of the characteristics of velocity and suspended sediment concentration (SSC)...
Isolating the AFFF signature in coastal watersheds using oxidizable PFAS precursors and unexplained organofluorine
Bridger J. Ruyle, Heidi M. Pickard, Denis R. LeBlanc, Andrea K. Tokranov, Colin P. Thackray, Xindi C. Hu, Chad D. Vecitis, Elsie M. Sunderland
2021, Environmental Science & Technology (55) 3686-3695
Water supplies for millions of U.S. individuals exceed maximum contaminant levels for per- and polyfluoroalkyl substances (PFAS). Contemporary and legacy use of aqueous film forming foams (AFFF) is a major contamination source. However, diverse PFAS sources are present within watersheds, making...
Incorporating the effects of complex soil layering and thickness local variability into distributed landslide susceptibility assessments
F. Fusco, Benjamin B. Mirus, Rex L. Baum, D. Calcaterra, P. De Vita
2021, Water (13)
Incorporating the influence of soil layering and local variability into the parameterizations of physics-based numerical models for distributed landslide susceptibility assessments remains a challenge. Typical applications employ substantial simplifications including homogeneous soil units and soil-hydraulic properties assigned based only on average textural classifications; the potential impact of these assumptions is...
Estimated total phosphorus loads for selected sites on Great Lakes tributaries, water years 2014–2018
G. F. Koltun
2021, Open-File Report 2020-1145
Monthly and annual total phosphorus loads were estimated for water years 2014 through 2018 for 23 streamgaged (gaged) sites on tributaries to the Great Lakes. Processing and regression methods described by Robertson and others (2018) were used with discrete and continuous data collected during water years 2011 and 2018 to...
Life history and population dynamics
Michael J Hansen, Christopher S. Guy, Charles R. Bronte, Nancy A. Nate
2021, Book chapter, The lake charr Salvelinus namaycush: Biology, ecology, distribution, and management
Lake charr Salvelinus namaycush life history and population dynamics metrics were reviewed to evaluate populations inside (n = 462) and outside (n = 24) the native range. Our goals were to create a database of metrics useful for evaluating population status and to test for large-scale patterns between metrics and...
Trophic ecology
Mark Vinson, Louise Chavarie, Caroline Lynn Rosinski, Heidi K. Swanson
2021, Book chapter, The lake charr Salvelinus namaycush: Biology, ecology, distribution, and management
The trophic ecology of lake charr Salvelinus namaycush morphotypes from small and large lakes within their native and introduced ranges is reviewed over the past 50 years. The lake charr is an apex predator in most habitats it occupies, where it plays a significant role in defining food webs. While often...
Southwestern fish and aquatic systems: The climate challenge
Jonathan T. Overpeck, Scott A. Bonar
2021, Book chapter, Standing between life and extinction: Ethics and ecology of conserving aquatic species in North American deserts
No abstract available....
Reproduction
Frederick W. Goetz, J. Ellen Marsden, Catherine A. Richter, Donald E. Tillitt, Shawn P. Sitar, Stephen Riley, Charles C. Krueger
2021, Book chapter, The lake charr Salvelinus namaycush: Biology, ecology, distribution, and management
Lake charr Salvelinus namaycush are typically fall spawners although one ecotype has populations that spawn during spring and fall (siscowets in Lake Superior). Lake charr are iteroparous (reproduce more than once in a lifetime) with group-synchronous ovarian development and typically spawn once per year. However, lake charr may not reproduce...
Deepwater debrites and linked megaturbidites in confined basins: An example from the Onnuri Basin, East Sea of Korea
Deniz Cukur, In-Kwon Um, Jong-Hwa Chun, Gwang-Soo Lee, Gee-Too Kong, Samuel Y. Johnson, Senay Horozal
2021, Journal of Sedimentary Research (91) 1-20
We analyzed data from seven piston cores, multi-channel seismic-reflection (MCS) and chirp profiles, and multibeam echosounder (MBES) data to study the distribution, emplacement time, sedimentary facies, and depositional processes of sediment-gravity-flow deposits in the Onnuri Basin, a confined basin in the East Sea. These data reveal that debris flows have...
Developing species-age cohorts from forest inventory and analysis data to parameterize a forest landscape model
Richard H. Odom, W. Mark Ford
2021, International Journal of Forestry Research (2021)
Simulating long-term, landscape level changes in forest composition requires estimates of stand age to initialize succession models. Detailed stand ages are rarely available, and even general information on stand history often is lacking. We used data from USDA Forest Service Forest Inventory and Analysis (FIA) database to estimate broad age...
Monitoring Tamarix changes using WorldView-2 satellite imagery in Grand Canyon National Park, Arizona
Nathaniel D. Bransky, Temuulen T. Sankey, Joel B. Sankey, Matthew D. Johnson, Levi R. Jamison
2021, Remote Sensing (13)
Remote sensing methods are commonly used to monitor the invasive riparian shrub tamarisk (Tamarix spp.) and its response to the northern tamarisk beetle (D. carinulata), a specialized herbivore introduced as a biocontrol agent to control tamarisk in the Southwest USA in 2001. We use a...
Practical field survey operations for flood insurance rate maps
Nicholas J. Taylor, Caelan E. Simeone
2021, Open-File Report 2020-1146
The U.S. Geological Survey assists the Federal Emergency Management Agency in its mission to identify flood hazards and zones for risk premiums for communities nationwide, by creating flood insurance rate maps through updating hydraulic models that use river geometry data. The data collected consist of elevations of river channels, banks,...
Continental-scale analysis of shallow and deep groundwater contributions to streams
D. Hare, A. M. Helton, Zachary C. Johnson, John W. Lane Jr., Martin A. Briggs
2021, Nature Communications (12)
Groundwater discharge generates streamflow and influences stream thermal regimes. However, the water quality and thermal buffering capacity of groundwater depends on the aquifer source-depth. Here, we pair multi-year air and stream temperature signals to categorize 1729 sites across the continental United States as having major dam...
Response to ‘Stochastic and deterministic interpretation of pool models’
Bonnie G. Waring, Benjamin N. Sulman, Sasha C. Reed, A. Peyton Smith, Colin Averill, Courtney Creamer, Daniela F. Cusack, Steven J. Hall, Julie D. Jastrow, Andrea Jilling, Kenneth M. Kemner, Markus Kleber, Xiao-Jun Allen Liu, Jennifer Pett-Ridge, Marjorie S. Schulz
2021, Global Change Biology (27) e11-e12
We concur with Azizi‐Rad et al. (2021) that it is vital to critically evaluate and compare different soil carbon models, and we welcome the opportunity to further describe the unique contribution of the PROMISE model (Waring et al. 2020) to this literature. The PROMISE framework does share many features with...
Characterization of groundwater recharge and flow in California's San Joaquin Valley from InSAR-observed surface deformation
W.R. Neely, A.A. Borsa, J.A. Burney, M.C. Levy, F. Silverii, Michelle Sneed
2021, Water Resources Research (57)
Surface deformation in California's Central Valley (CV) has long been linked to changes in groundwater storage. Recent advances in remote sensing have enabled the mapping of CV deformation and associated changes in groundwater resources at increasingly higher spatiotemporal resolution. Here, we use interferometric synthetic aperture radar...
Greenhouse gas emissions from an arid-zone reservoir and their environmental policy significance: Results from existing global models and an exploratory dataset
Sarah Waldo, Bridget Deemer, Lucas S. Bair, Jake J. Beaulieu
2021, Environmental Science and Policy (120) 53-62
Reservoirs in arid regions often provide critical water storage but little is known about their greenhouse gas (GHG) footprint. While there is growing appreciation of the role reservoirs play as GHG sources, there is a lack of understanding of GHG emission dynamics from reservoirs in...
The tide turns: Episodic and localized cross-contamination of a California coastline with cyanotoxins
Avery O. Tatters, Jayme Smith, Raphael M. Kudela, Kendra Hayashi, Meredith D. A. Howard, Ariel Donovan, Keith A. Loftin, David A. Caron
2021, Harmful Algae (103)
The contamination of coastal ecosystems from a variety of toxins of marine algal origin is a common and well-documented situation along the coasts of the United States and globally. The occurrence of toxins originating from cyanobacteria along marine coastlines is much less...
Extent, configuration and diversity of burned and forested areas predict bat richness in a fire-maintained forest
R. V. Blakey, Elisabeth B. Webb, D. C. Kesler, R. B. Siegel, D. Corcoran, J. S. Cole, Matthew Johnson
2021, Landscape Ecology (36) 1101-1115
ContextFire transforms, fragments and sometimes maintains forests, creating mosaics of burned and unburned patches. Highly mobile animals respond to resources in the landscape at a variety of spatial scales, yet we know little about their landscape-scale relationships with fire.ObjectivesWe aimed to identify drivers of bat richness...
Evidence of economical territory selection in a cooperative carnivore
Sarah N. Sells, Michael S. Mitchell, Kevin M. Podruzny, Justin A. Gude, Allison Keever, Diane K. Boyd, T.D. Smucker, Abigail A. Nelson, Tyler W. Parks, Nathan J. Lance, Michael S. Ross, Robert M. Inman
2021, Proceedings of the Royal Society B: Biological Sciences (288)
As an outcome of natural selection, animals are probably adapted to select territories economically by maximizing benefits and minimizing costs of territory ownership. Theory and empirical precedent indicate that a primary benefit of many territories is exclusive access to food resources, and primary costs of defending and using space are...
Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers
Lewis Bailey, Michael Clare, Kurt J. Rosenberger, Matthieu J.B. Cartigny, Peter J. Talling, Charles K. Paull, Roberto Gwiazda, Daniel Parsons, Stephen Simmons, Jingping Xu, Ivan Haigh, Katherine L. Maier, Mary McGann, Eve M. Lundsten
2021, Earth and Planetary Science Letters (562)
Turbidity currents dominate sediment transfer into the deep ocean, and can damage critical seabed infrastructure. It is commonly inferred that powerful turbidity currents are triggered by major external events, such as storms, river floods, or earthquakes. However, basic models for turbidity current...
Stationary hydroacoustics demonstrates vessel avoidance biases during mobile hydroacoustic surveys of alewife in Lake Ontario
Conner Elliot, Jeremy Holden, Michael Connerton, Brian Weidel, Bruce Tufts
2021, Journal of Great Lakes Research 514-521
Mobile hydroacoustic surveys are routinely used to estimate pelagic fish abundance. In the Great Lakes, alewife are commonly surveyed with mobile hydroacoustics, however, their behavior often has them associated with epilimnetic habitats which increases the potential for vessel avoidance to bias hydroacoustic observations. Abundance...
