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10450 results.

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Modeling round goby growth in Lake Michigan and Lake Huron with multi-model inference
Youjian Duan, Charles P. Madenjian, Yingming Zhao, Bin Huo
2021, Fisheries Research (236)
Although the round goby Neogobius melanostomus has become established throughout the Laurentian Great Lakes, a multi-model inference (MMI) approach toward characterizing round goby growth in the Laurentian Great Lakes has yet to applied using otolith-derived data. Further, spatial variation in round goby growth among...
Apparent earthquake rupture predictability
M.-A. Meier, P. Ampuero, Elizabeth S. Cochran, Morgan T. Page
2021, Geophysical Journal International (225) 657-663
To what extent can the future evolution of an ongoing earthquake rupture be predicted? This question of fundamental scientific and practical importance has recently been addressed by studies of teleseismic source time functions (STFs) but reaching contrasting conclusions. One study concludes that the initial portion of STFs is the...
Shared functional traits explain synchronous changes in long‐term count trends of migratory raptors
Patricia Kaye T. Dumandan, Keith L. Bildstein, Laurie J. Goodrich, Andrii Zaiats, Trevor Caughlin, Todd E. Katzner
2021, Global Ecology and Biogeography (30) 640-650
AimAssessing long‐term shifts in faunal assemblages is important to understand the consequences of ongoing global environmental change. One approach to assess drivers of assemblage changes is to identify the traits associated with synchronous shifts in count trends among species. Our research identified traits influencing trends in 73 years...
Fire controls annual bromes in northern great plains grasslands—Up to a point
Amy Symstad, Deborah A. Buhl, Daniel J Swanson
2021, Rangeland Ecology & Management (75) 17-28
Concern about the impacts of two invasive annual brome grasses (cheatgrass and Japanese brome, Bromus tectorum L. and B. japonicus Thunb. ex Murray) on the mixed-grass prairie of North America's northern Great Plains (NGP) is growing. Cheatgrass is well known west of the NGP, where replacement of fire-intolerant, native sagebrush steppe by fire-prone, exotic...
Lake-wide annual status of Mysis diluviana population in Lake Michigan in 2015
Toby J. Holda, Lars G. Rudstam, Steven A. Pothoven, David Warner, Dmytro S. Krystenko, James M. Watkins
2021, Journal of Great Lakes Research (47) 190-203
Mysis diluviana is one of the most abundant zooplankton by biomass in the Laurentian Great Lakes of North America, a predator of other zooplankton and an important prey for fishes. Studies of long-term trends in Lake Michigan have shown 2005–2016 densities to be 50–80% lower than 1990s densities, but these observations...
Rupture process of the M6.5 Stanley, Idaho, earthquake inferred from seismic waveform and geodetic data
Frederick Pollitz, William C. Hammond, Charles Wicks
2021, Seismological Research Letters (92) 699-709
The 2020 M 6.5 Stanley, Idaho, earthquake produced rupture in the north of the active Sawtooth fault in the northern basin and range at depth, without any observable surface rupture. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) data yield several millimeters of static offsets out to ∼100 km from the...
A long-term geothermal observatory across subseafloor gas hydrates, IODP Hole U1364A, Cascadia accretionary prism
K. Elizabeth Becker, E. E. Davis, M. Hessemann, J. A. Collins, Jeffrey J. McGuire
2021, Frontiers in Earth Sciences (8)
We report 4 years of temperature profiles collected from May 2014 to May 2018 in Integrated Ocean Drilling Program Hole U1364A in the frontal accretionary prism of the Cascadia subduction zone. The temperature data extend to depths of nearly 300 m below seafloor (mbsf), spanning the gas hydrate stability zone at the...
Water storage decisions will determine the distribution and persistence of imperiled river fishes
Kimberly L. Dibble, Charles B. Yackulic, Theodore Kennedy, Kevin R. Bestgen, John C. Schmidt
2021, Ecological Applications (31)
Managing the world’s freshwater supply to meet societal and environmental needs in a changing climate is one of the biggest challenges for the 21st century. Dams provide water security, however, the allocation of dwindling water supply among reservoirs could exacerbate or ameliorate the effects of climate change on aquatic communities. Here,...
Performance of the ecosystem demography model (EDv2.2) in simulating gross primary production capacity and activity in a dryland study area
Hamid Dashti, Karun Pandit, Nancy F. Glenn, Douglas J. Shinneman, Gerald N. Flerchinger, Andrew A. Hudak, Marie Anne de Graaf, Alejandro N Flores, Susan L. Ustin, Nayani Ilangakoon, Aaron W. Fellows
2021, Agricultural and Forest Meteorology (297)
Dryland ecosystems play an important role in the global carbon cycle, including regulating the inter-annual global carbon sink. Dynamic global vegetation models (DGVMs) are essential tools that can help us better understand carbon cycling in different ecosystems. Currently, there is limited knowledge of the performance of these models in drylands...
Pesticides and pesticide degradates in groundwater used for public supply across the United States: Occurrence and human-health context
Laura M. Bexfield, Kenneth Belitz, Bruce D. Lindsey, Patricia Toccalino, Lisa H. Nowell
2021, Environmental Science & Technology (55) 362-372
This is the first assessment of groundwater from public-supply wells across the United States to analyze for >100 pesticide degradates and to provide human-health context for degradates without benchmarks. Samples from 1204 wells in aquifers representing 70% of the volume pumped for drinking supply were analyzed for 109 pesticides (active...
Examining the potential conflict between sea otter recovery and Dungeness crab fisheries in California
Andre M. Boustany, David Hernandez, Emily A Miller, Fujii. Jessica, Teri E. Nicholson, Joseph A. Tomoleoni, Kyle S. Van Houtan
2021, Biological Conservation (253)
Human exploitation of marine mammals led to precipitous declines in many wild populations within the last three centuries. Legal protections enacted throughout the 20th century have enabled the recovery of many of these species and some recoveries have resulted in conflict...
Effective hydrological events in an evolving mid‐latitude mountain river system following cataclysmic disturbance—A saga of multiple influences
Jon J. Major, Kurt R. Spicer, Adam R. Mosbrucker
2021, Water Resources Research (57)
Cataclysmic eruption of Mount St. Helens (USA) in 1980 reset 30 km of upper North Fork Toutle River (NFTR) valley to a zero‐state fluvial condition. Consequently, a new channel system evolved. Initially, a range of streamflows eroded channels (tens of meters incision, hundreds of meters widening) and transported immense sediment...
Monitoring network changes during the 2018 Kīlauea Volcano eruption
Brian Shiro, Michael H. Zoeller, Kevan Kamibayashi, Ingrid A. Johanson, Carolyn Parcheta, Matthew R. Patrick, Patricia A. Nadeau, R. Lopaka Lee, Asta Miklius
2021, Seismological Research Letters (92) 102-118
In the summer of 2018, Kīlauea Volcano underwent one of its most significant eruptions in the past few hundred years. The volcano’s summit and East Rift Zone magma system partially drained, resulting in a series of occasionally explosive partial caldera collapses, and widespread lava flows in the lower East Rift...
Evaluating management options to reduce Lake Erie algal blooms using an ensemble of watershed models
Jay F. Martin, Margaret M Kalcic, Noel Aloysis, Anna Apostel, Michael Brooker, Grey R. Evenson, Jeffrey B Kast, Haley Kujawa, Asmita Murumkar, Richard Becker, Chelsie Boles, Remegio Confesor, Awoke T Dagnew, Tian Guo, Colleen M Long, Rebecca Logsdon Muenich, Donald Scavia, Todd Redder, Dale M. Robertson, Yu-Chen Wang
2021, Journal of Environmental Management (280)
Reducing harmful algal blooms in Lake Erie, situated between the United States and Canada, requires implementing best management practices to decrease nutrient loading from upstream sources. Bi-national water quality targets have been set for total and dissolved phosphorus loads, with the ultimate goal of...
Multi-geophysical parameter classification of the Montserrat geothermal system
Racine A. Basant, Graham A. Ryan, Jared R. Peacock, Antonio G. Camacho, Oshaine O. Blake, Stefanie Hautmann, Bridget Y. Lynne
2021, Geothermics (90)
Multi-geophysical parameter classification can help to reduce the uncertainties of interpretations that often rely on one geophysical technique. Integrating these varying datasets requires a more robust classification approach rather than traditional qualitative methods. In this study, we applied the Fuzzy c-means...
The birth of a Hawaiian fissure eruption
Bruce F. Houghton, Caroline M. Tisdale, Edward W. Llewellin, Jacopo Taddeucci, Tim R. Orr, Brett H. Walker, Matthew R. Patrick
2021, Journal of Geophysical Research: Solid Earth (126)
Most basaltic explosive eruptions intensify abruptly, allowing little time to document processes at the start of eruption. One opportunity came with the initiation of activity from fissure 8 (F8) during the 2018 eruption on the lower East Rift Zone of Kīlauea, Hawaii. F8 erupted in four episodes. We recorded 28 min...
Interactive PHREEQ-N-AMDTreat water-quality modeling tools to evaluate performance and design of treatment systems for acid mine drainage
Charles A. Cravotta III
2021, Applied Geochemistry (126)
The PHREEQ-N-AMDTreat aqueous geochemical modeling tools described herein simulate changes in pH and solute concentrations resulting from passive and active treatment of acidic or alkaline mine drainage (AMD). The “user-friendly” interactive tools, which are publicly available software, utilize PHREEQC equilibrium aqueous and surface speciation models and...
Is there enough water? How bearish and bullish outlooks are linked to decision-maker perspectives on environmental flows
Sean M. Wineland, Rachel Fovargue, Betsey York, Abigail Lynch, Craig P. Paukert, Thomas M. Neeson
2021, Journal of Environmental Management (280)
Policies that mandate environmental flows (e-flows) can be powerful tools for freshwater conservation, but implementation of these policies faces many hurdles. To better understand these challenges, we explored two key questions: (1) What additional data are needed to implement e-flows? and...
Time-to-detection occupancy methods: Performance and utility for improving efficiency of surveys
Brian J. Halstead, Jonathan P. Rose, Patrick M. Kleeman
2021, Ecological Applications (31)
Occupancy methods propelled the quantitative study of species distributions forward by separating the observation process, or the imperfect detectability of species, from the ecological processes of interest governing species distributions. Occupancy studies come at a cost, however: the collection of additional data to account for nondetections...
Evaluation of a roughness length parametrization accounting for wind–wave alignment in a coupled atmosphere–wave model
Sara Porchetta, O. Temel, John C. Warner, J.C. Munoz-Esparza, J Monbaliu, J. van Beeck, N. van Lipzig
2021, Quarterly Journal of the Royal Meteorological Society (147) 825-846
The importance of wind energy as an alternative energy source has increased over the latest years with more focus on offshore winds. A good estimation of the offshore winds is thus of major importance for this industry. Up to now the effect of the wind–wave (mis)alignment has not yet been...
Small atoll fresh groundwater lenses respond to a combination of natural climatic cycles and human modified geology
Martin A. Briggs, J Cantelon, B. Kurylyk, Justin T. Kulongoski, Audrey Mills, John W. Lane Jr.
2021, Science of the Total Environment (756)
Freshwater lenses underlying small ocean islands exhibit spatial variability and temporal fluctuations in volume, influencing ecologic management. For example, The Palmyra Atoll National Wildlife Refuge harbors one of the few surviving native stands of Pisonia grandis in the central Pacific Ocean, yet these trees face pressure from groundwater salinization, with little basic...
Latency of waveform data delivery from the Southern California Seismic Network during the 2019 Ridgecrest earthquake sequence and its effect on ShakeAlert
Igor Stubailo, Mark Alvarez, Glenn Biasi, Rayomand Bhadha, Egill Hauksson
2021, Seismological Research Letters (92) 170-186
The occurrence of the 4–6 July 2019 Mw  6.4 and Mw 7.1 Ridgecrest earthquake sequence provided the first full‐scale test of the network and telemetry readiness of the Southern California Seismic Network (SCSN), to support the ShakeAlert earthquake early warning (EEW) system in California. ShakeAlert is...
Ancient Egyptian mummified shrews (Mammalia: Eulipotyphla: Soricidae) and mice (Rodentia: Muridae) from the Spanish Mission to Dra Abu el-Naga, and their implications for environmental change in the Nile valley during the past two millennia
Neal Woodman, Salima Ikram
2021, Quaternary Research (100) 21-31
Excavation of Ptolemaic Period (ca. 309–30 BC) strata within Theban Tombs 11, 12, -399-, and UE194A by the Spanish Mission to Dra Abu el-Naga (also known as the Djehuty Project), on the west bank of the Nile River opposite Luxor, Egypt, yielded remains of at least 175 individual small mammals...
Mainstems: A logical data model implementing mainstem and drainage basin feature types based on WaterML2 Part 3: HY Features concepts
David L. Blodgett, J. Micheal Johnson, Mark Sondheim, Michael Wieczorek, Nels Frazier
2021, Environmental Modelling and Software (135)
The Mainstems data model implements the catchment and flowpath concepts from WaterML2 Part 3: Surface Hydrology Features (HY_Features) for persistent, cross-scale, identification of hydrologic features. The data model itself provides a focused and lightweight method to describe hydrologic networks with minimum but sufficient information. The design is intended...
Skin fungal assemblages of bats vary based on susceptibility to white-nose syndrome
Karen J Vanderwolf, Lewis Campbell, Tony L. Goldberg, David S. Blehert, Jeffrey M. Lorch
2021, ISME Journal (15) 909-920
Microbial skin assemblages, including fungal communities, can influence host resistance to infectious diseases. The diversity-invasibility hypothesis predicts that high-diversity communities are less easily invaded than species-poor communities, and thus diverse microbial communities may prevent pathogens from colonizing a host. To explore the hypothesis that host fungal...