Spatial and temporal behavioral differences between angler-access types
D. S. Kane, Mark A Kaemingk, Christopher J. Chizinski, Kevin L. Pope
2020, Fisheries Research
Recreational angler surveys typically collect information on how anglers access a fishery. Yet, it is unclear how this information is useful for fisheries management and conservation. The objective of this study was to compare behavior (e.g., party size, time fished, and numbers of fish released and harvested) of bank and...
Reverberating effects of resource exchanges in stream–riparian food webs
Scott F. Collins, Colden V. Baxter, Amy M. Marcarelli, Laura Felicetti, Scott Florin, Mark S. Wipfli, Gregg Servheen
2020, Oecologia (192) 179-189
Fluxes of materials or organisms across ecological boundaries, often termed “resource subsidies,” directly affect recipient food webs. Few studies have addressed how such direct responses in one ecosystem may, in turn, influence the fluxes of materials or organisms to other habitats or the potential for feedback relationships to occur among...
Dimensional effects of inter-phase mass transfer on attenuation of structurally trapped gaseous carbon dioxide in shallow aquifers
Jakub Solovsky, Radek Fucik, Michelle R. Plampin, Tissa H. Illangasekare, Jiri Mikyska
2020, Journal of Computational Physics (405)
Based on experimental evidence and using mathematical modeling, inter-phase mass transfer processes of CO2 exsolving from and dissolving into water in heterogeneous porous media are investigated under two fundamentally different flow conditions: in a quasi one dimensional vertical column and in a two-dimensional tank with a lateral background water flow, both...
Declining aluminum toxicity and the role of exposure duration on brook trout mortality in acidified streams of the Adirondack Mountains, New York, USA
Barry P. Baldigo, Scott George, Gregory B. Lawrence, Eric A. Paul
2020, Environmental Toxicology and Chemistry (39) 623-636
Mortality of brook trout Salvelinus fontinalis and water chemistry were characterized in 6 headwater streams in the western Adirondacks of New York during spring 2015, 2016, and 2017 and compared with results from analogous tests done between 1980 and 2003 in many of the same streams, to assess temporal changes in toxicity...
Toward ecosystem accounts for Rwanda: Tracking 25 years of change in potential supply and flows of ecosystem services
Kenneth J. Bagstad, Jane Carter Ingram, Glenn-Marie Lange, Michel K. Masozera, Zachary H. Ancona, Mediatrice Bana, Desire Kabogo, Bernard Musana, Nsharwasi Leon Nabahungu, Emmanuel Rukundo, Evariste Rutebuka, Stephen Polasky, Denis Rugege, Claudine Uwera
2020, People and Nature (1) 163-188
1. Rwanda, a small but rapidly developing central African nation, has undertaken development of natural capital accounts to better inform its economic development through the World Bank’s Wealth Accounting and Valuation of Ecosystem Services (WAVES) Partnership. In this paper, we develop ecosystem service (ES) models to quantify the physical supply...
Roosting habitat use by sandhill cranes and waterfowl on the North and South Platte Rivers in Nebraska
Dana M Varner, Aaron T. Pearse, Andrew Bishop, Jonas Davis, John Denton, Roger Grosse, Heather M. Johnson, Emily Munter, Kirk D Schroeder, Robert E. Spangler, Mark P. Vrtiska, Angelina Wright
2020, Journal of Fish and Wildlife Management (11) 56-67
Migration ecology and habitat use of spring migrating birds using the Central Platte River is a well-explored topic, yet less is known about use of the North and South Platte rivers (NSPR) in western Nebraska. The efficiency and effectiveness of conservation efforts in the NSPR could be greatly improved with...
Controls on debris‐flow initiation on burned and unburned hillslopes during an exceptional rainstorm in southern New Mexico, USA
Anne C. Tillery, Francis K. Rengers
2020, Earth Surface Processes and Landforms (45) 1051-1066
AbstractUsing observations from 688 debris flows, we analyse the hydrologic and landscape characteristics that influenced debris‐flow initiation mechanisms and locations in a watershed that had been partially burned by the 2012 Whitewater‐Baldy Complex Fire in the Gila Mountains, southern New Mexico. Debris flows can initiate due...
Energetic status of Alaskan Chinook Salmon: Interpopulation comparisons and predictive modeling using bioelectrical impedance analysis
Kristin R. Courtney, Jeffrey A. Falke, M. Keith Cox, Jeff Nichols
2020, North American Journal of Fisheries Management (40) 209-224
Adult Pacific Salmon Oncorhynchus spp. undertake energetically demanding migrations wherein they must have adequate energy reserves to survive to spawning locations and reproduce. Proximate analysis provides insight into available energy stores (e.g., lipids), but the ability to non-lethally monitor energetic status may be useful for managers to better understand how...
Coldwater periods in warmwater streams: Microhabitat shifts from autumn to winter by Smallmouth Bass
S. L. Wolf, Robert Mollenhauer, Shannon K. Brewer
2020, North American Journal of Fisheries Management (39) 1360-1372
Seasonal and life stage variation in microhabitat use is an important driver of fish survival and bioenergetics, but knowledge of microhabitat selection during colder periods is generally lacking in warmwater streams. Our objective was to examine changes in microhabitat selection by age‐0 (TL ≤ 85 mm) and age‐1+ (TL > 85 mm)...
Spatially explicit models of seasonal habitat for greater sage‐grouse at broad spatial scales: Informing areas for management in Nevada and northeastern California
Peter S. Coates, Brianne E. Brussee, Mark A. Ricca, John Severson, Michael L. Casazza, K. Benjamin Gustafson, Shawn P. Espinosa, Scott C. Gardner, David J Delahunty
2020, Ecology and Evolution (10) 104-118
Defining boundaries of species' habitat across broad spatial scales is often necessary for management decisions, and yet challenging for species that demonstrate differential variation in seasonal habitat use. Spatially explicit indices that incorporate temporal shifts in selection can help overcome such challenges, especially for species of high conservation concern. Greater...
History and sources of co-occurring pesticides in an abstraction well unravelled by age distributions of depth specific groundwater samples
Rasmus Jakobsen, Klaus Hinsby, Jens Aamand, Peter van der Keur, Jacob Kidmose, Roland Purtschert, Bryant C. Jurgens, Jurgen Sultenfuss, Christian N. Albers
2020, Environmental Science & Technology (54) 158-165
When groundwater-based drinking water supply becomes contaminated, the timing and source of contamination are obvious questions. However, contaminants often have diffuse sources and different contaminants may have different sources even in a single groundwater well, making these questions complicated to answer. Age dating of groundwater has been used to reconstruct...
Present-day mass wasting in sulfate-rich sediments in the equatorial regions of Mars
Melissa F Thomas, Alfred S. McEwen, Colin M. Dundas
2020, Icarus (342)
Present-day topographic changes are observed on steep slopes in equatorial regions of Mars that are associated with sulfate-rich sediments. Hydrated sulfates are known to be present in many sedimentary deposits on Mars. We document volume changes in the form of mass movements and gullies over these regions. We have estimated...
Deposition potential and flow-response dynamics of emergent sandbars in a braided river
Jason S. Alexander, Brandon McElroy, Snehalata Huzurbazar, Caroline M. Elliott, Marissa L. Murr
2020, Water Resources Research (56)
Sandbars are ubiquitous in sandy‐braided rivers throughout the world. In the Great Plains of the United States, recovery and expansion of emergent sandbar habitat (ESH) has been a priority in lowland rivers where the natural extent of sandbars has been degraded. Recovery efforts are aimed at protection of populations of...
Nitrogen budgets of the Long Island Sound estuary
Penny Vlahos, Michael Whitney, Christina Menniti, John R. Mullaney, Jonathan Morrison, Yan Jia
2020, Estuarine, Coastal and Shelf Science (232)
Nitrogen (N) inputs to coastal ecosystems have significant impacts on coastal community structure. In N limited systems, increases in N inputs may lead to excess productivity and hypoxia. Like many temperate estuaries, Long Island Sound (LIS), a major eastern U.S. estuary, is a N limited system which has experienced seasonal...
Pleistocene lakes and paleohydrologic environments of the Tecopa basin, California: Constraints on the drainage integration of the Amargosa River
Marith C. Reheis, John Caskey, Jordon Bright, James B. Paces, Shannon A. Mahan, Elmira Wan
2020, GSA Bulletin (132) 1537-1565
The Tecopa basin in eastern California was a terminal basin that episodically held lakes during most of the Quaternary until the basin and its modern stream, the Amargosa River, became tributary to Death Valley. Although long studied for its sedimentology, diagenesis, and paleomagnetism, the basin’s lacustrine and paleoclimate history has...
The sedimentary record of the 2018 Anchorage Earthquake in Eklutna Lake, Alaska: Calibrating the lacustrine seismograph
Maarten Van Daele, Peter J. Haeussler, Robert C. Witter, Nore Praet, Marc De Batist
2020, Seismological Research Letters (91) 126-141
The 30 November 2018 Mw">MMw">w 7.1 Anchorage earthquake caused modified Mercalli intensities of V¼ to V½ at Eklutna Lake...
Hydrologic resilience from summertime fog and recharge: A case study for coho salmon recovery planning
Alicia A. Torregrosa, Lorraine E. Flint, Alan L. Flint
2020, Journal of the American Water Resources Association (56) 134-160
Fog and low cloud cover (FLCC) and late summer recharge increase stream baseflow and decrease stream temperature during arid Mediterranean climate summers, which benefits salmon especially under climate warming conditions. The potential to discharge cool water to streams during the late summer (hydrologic capacity; HC) furnished by FLCC and recharge...
Inoculation and habitat amelioration efforts in biological soil crust recovery vary by desert and soil texture
Akasha M. Faist, Anita J. Antoninka, Jayne Belnap, Matthew A. Bowker, Michael C. Duniway, Ferran Garcia-Pichel, Corey Nelson, Sasha C. Reed, Ana Giraldo Silva, Sergio Velasco-Ayuso, Nichole N. Barger
2020, Restoration Ecology (28) s96-s105
As dryland degradation continues, it is increasingly important to understand how to effectively restore biocrust communities. Potential techniques include the addition of biocrust inoculum to accelerate biocrust recovery. Enhanced erosion typical of degraded environments creates a challenge for these approaches, due to loss by wind or water and burial by...
Could a freshwater fish be at the root of dystrophic crises in a coastal lagoon?
Marco Milardi, Elisa Soana, Duane Chapman, Elisa Anna Fano, Giuseppe Castaldelli
2020, Science of the Total Environment (711)
Eutrophication has a profound impact on ecosystems worldwide. Grass carp Ctenopharyngodon idella, an herbivorous fish, has been introduced to control aquatic plant overgrowth caused by eutrophication, but could have other, potentially detrimental, effects. We used the Po di Volano basin (south of the Po River...
Controls on sediment distribution in the coastal zone of the central California transform continental margin, USA
Samuel Y. Johnson, Jeffrey W. Beeson, Janet Watt, Ray Sliter, Antoinette Papesh
2020, Marine Geology (420)
We use >10,000 km of high-resolution seismic-reflection data together with multibeam bathymetry to document complex and highly variable post-Last Glacial Maximum (LGM) sediment distribution and thickness in the coastal zone (~10 m isobath to 5.6 km offshore) along a ~800 km section of central California's transform continental margin. Sediment thickness ranges from 0...
Using integrated population models for insights into monitoring programs: An application using pink-footed geese
Fred Johnson, Guthrie S. Zimmerman, Gitte H. Jensen, Kevin K. Clausen, Morten Frederiksen, Jesper Madsen
2020, Ecological Modelling (415)
Development of integrated population models (IPMs) assume the absence of systematic bias in monitoring programs, yet many potential sources of systematic bias in monitoring data exist (e.g., under-counts of abundance). By integrating multiple sources of data, we can assess whether various sources of monitoring data provide consistent inferences about changes...
Heat accumulation on coral reefs mitigated by internal waves
Alex S. J. Wyatt, James J. Leichter, Lauren T. Toth, Toshihiro Miyajima, Richard B. Aronson, Toshi Nagata
2020, Nature Geoscience (13) 28-34
Coral reefs are among the most species-rich, productive and economically valuable ecosystems on Earth but increasingly frequent pantropical coral bleaching events are threatening their persistence on a global scale. The 2015–2016 El Niño led to the hottest sea surface temperatures on record and widespread bleaching of shallow-water corals. However, the...
Life history structure of westslope cutthroat trout: Inferences from otolith microchemistry
John W Heckel, Michael C. Quist, Carson J. Watkins, Andrew M. Dux
2020, Fisheries Research (222)
Life history diversity is important for population stability and is dependent on connectivity to habitat that supports all life stages and life history strategies for a species. Westslope Cutthroat Trout Oncorhynchus clarkii lewisi (WCT) exhibit plasticity in life history strategies in response to environmental variability, but fisheries managers have been challenged with...
Compound effects of water clarity, inflow, wind and climate warming on mountain lake thermal regimes
Kyle R. Christianson, Brett M. Johnson, Mevin Hooten
2020, Aquatic Sciences (82)
Many studies have examined the effects of climate warming on lake stability, but few have addressed environmental changes concomitant with climate change, such as alterations in water clarity and lake inflow. Although air temperature rise is a predominant factor linked to lake thermal characteristics, climate-driven changes at watershed scales can...
Development of two quantitative PCR assays for detection of several Cottus species from environmental DNA in Pacific coast watersheds of North America
Marshal S. Hoy, Carl O. Ostberg
2020, Conservation Genetics Resources (12) 361-363
We developed two quantitative PCR assays for use with environmental DNA (eDNA) to detect numerous species in the genus Cottus that are indigenous to the Pacific coast watersheds of North America. We conducted in vitro assay validations on ten Cottus species and 32 potentially co-occurring non-Cottus species. We demonstrate the efficacy of these assays by...
