The influence of vegetation on the hydrodynamics and geomorphology of a tree island in Everglades National Park (Florida, United States)
Pamela L. Sullivan, Victor C. Engel, Michael S. Ross, Rene M. Price
2013, Ecohydrology (7) 727-744
Transpiration-driven nutrient accumulation has been identified as a potential mechanism governing the creation and maintenance of wetland vegetation patterning. This process may contribute to the formation of nutrient-rich tree islands within the expansive oligotrophic marshes of the Everglades (Florida, United States). This study presents hydrogeochemical data indicating that tree root...
Hydrologic controls on the transport and cycling of carbon and nitrogen in a boreal catchment underlain by continuous permafrost
Joshua C. Koch, Robert L. Runkel, Robert G. Striegl, Diane M. McKnight
2013, Journal of Geophysical Research G: Biogeosciences (118) 698-712
Boreal ecosystems represent a large carbon (C) reservoir and a substantial source of greenhouse gases. Hydrologic conditions dictate whether C leached from boreal soils is processed in catchments or flushed to less productive environments via the stream. This study quantified hydrologic and biogeochemical C loss from a boreal catchment underlain...
The influence of sea level rise and changes in fringing reef morphology on gradients in alongshore sediment transport
A. E. Grady, L. J. Moore, Curt D. Storlazzi, E. Elias, M. A. Reidenbach
2013, Geophysical Research Letters (40) 3096-3101
Climate‐change‐induced alterations to coral reef ecosystems, in combination with sea level rise, have the potential to significantly alter wave dissipation across reefs, leading to shifts in alongshore sediment transport gradients and alterations to tropical coastlines. We used Delft3D to model schematized profiles of two reef flat widths based on the...
Macroinvertebrate diets reflect tributary inputs and turbidity-driven changes in food availability in the Colorado River downstream of Glen Canyon Dam
Holly A. Wellard Kelly, Emma J. Rosi-Marshall, Theodore A. Kennedy, Robert O. Hall Jr., Wyatt F. Cross, Colden V. Baxter
2013, Freshwater Science (32) 397-410
Physical changes to rivers associated with large dams (e.g., water temperature) directly alter macroinvertebrate assemblages. Large dams also may indirectly alter these assemblages by changing the food resources available to support macroinvertebrate production. We examined the diets of the 4 most common macroinvertebrate taxa in the Colorado River through Glen...
Estimating wildfire risk on a Mojave Desert landscape using remote sensing and field sampling
Peter F. Van Linn III, Kenneth E. Nussear, Todd C. Esque, Lesley A. DeFalco, Richard D. Inman, Scott R. Abella
2013, International Journal of Wildland Fire (22) 770-779
Predicting wildfires that affect broad landscapes is important for allocating suppression resources and guiding land management. Wildfire prediction in the south-western United States is of specific concern because of the increasing prevalence and severe effects of fire on desert shrublands and the current lack of accurate fire prediction tools. We...
Pyroclastic density currents associated with the 2008-2009 eruption of Chaitén Volcano (Chile): forest disturbances, deposits, and dynamics
Jon J. Major, Thomas C. Pierson, Richard P. Hoblitt, Hugo Moreno
2013, Andean Geology (40) 324-358
Explosive activity at Chaitén Volcano in May 2008 and subsequent dome collapses over the following nine months triggered multiple, small-volume pyroclastic density currents (PDCs). The explosive activity triggered PDCs to the north and northeast, which felled modest patches of forest as far as 2 km from the caldera rim....
Doppler weather radar observations of the 2009 eruption of Redoubt Volcano, Alaska
David J. Schneider, Richard P. Hoblitt
2013, Journal of Volcanology and Geothermal Research (259) 133-144
The U.S. Geological Survey (USGS) deployed a transportable Doppler C-band radar during the precursory stage of the 2009 eruption of Redoubt Volcano, Alaska that provided valuable information during subsequent explosive events. We describe the capabilities of this new monitoring tool and present data captured during the Redoubt eruption. The MiniMax...
A Unified Flash Flood Database across the United States
Jonathan J. Gourley, Yang Hong, Zachary L. Flamig, Ami Arthur, Robert Clark, Martin Calianno, Isabelle Ruin, Terry W. Ortel, Michael Wieczorek, Pierre-Emmanuel Kirstetter, Edward Clark, Witold F. Krajewski
2013, Bulletin of the American Meteorological Society (94) 799-805
Despite flash flooding being one of the most deadly and costly weather-related natural hazards worldwide, individual datasets to characterize them in the United States are hampered by limited documentation and can be difficult to access. This study is the first of its kind to assemble, reprocess, describe, and disseminate a...
Global climate change impacts on coastal ecosystems in the Gulf of Mexico: Considerations for integrated coastal management
John W. Day, Alejandro Yáñez-Arancibia, James H. Cowan, Richard H. Day, Robert R. Twilley, John R. Rybczyk
2013, Book chapter, Gulf of Mexico origin, waters, and biota, volume 4: Ecosystem-based management
Global climate change is important in considerations of integrated coastal management in the Gulf of Mexico. This is true for a number of reasons. Climate in the Gulf spans the range from tropical to the lower part of the temperate zone. Thus, as climate warms, the tropical temperate interface, which...
Rejoinder: Challenge and opportunity in the study of ungulate migration amid environmental change
Arthur D. Middleton, Matthew J. Kauffman, Douglas E. McWhirter, John G. Cook, Rachel C. Cook, Abigail A. Nelson, Michael D. Jimenez, Robert W. Klaver
2013, Ecology (94) 1280-1286
Increasingly, animals that migrate long distances to exploit seasonal habitats must traverse political boundaries capable of altering the very ecological gradients that promote migratory behavior. This transboundary aspect of migration presents many new challenges and opportunities for research and conservation (e.g., Bolger et al. 2008, Taillon et al. 2012). Work to...
Use of soil-streamwater relationships to assess regional patterns of acidic deposition effects in the northeastern USA
Jason Siemion, Gregory B. Lawrence, Peter S. Murdoch
2013, Hydrological Processes (28) 3615-3626
Declines of acidic deposition levels by as much as 50% since 1990 have led to partial recovery of surface waters in the northeastern USA but continued depletion of soil calcium through this same period suggests a disconnection between soil and surface water chemistry. To investigate the role of soil-surface water...
Redd dewatering effects on hatching and larval survival of the robust redhorse
J. M. Fisk III, Thomas J. Kwak, R. J. Heise, F. W. Sessions
2013, River Research and Applications (29) 574-581
Riverine habitats have been altered and fragmented from hydroelectric dams and change spatially and temporally with hydropower flow releases. Hydropeaking flow regimes for electrical power production inundate areas that create temporary suitable habitat for fish that may be rapidly drained. Robust redhorse Moxostoma robustum, an imperiled, rare fish species, uses...
A natural resource condition assessment for Sequoia and Kings Canyon National Parks: Appendix 14: plants of conservation concern
Ann Huber, Adrian Das, Rebecca Wenk, Sylvia Haultain
2013, Natural Resource Report NPS/SEKI/NRR--2013/665.14
Sequoia and Kings Canyon National Parks are located in the California Floristic Province, which has been named one of world‘s hotspots of endemic biodiversity (Myers et al. 2000). The California Floristic Province is the largest and most important geographic floristic unit in California and extends from the Klamath Mountains of...
Chronology of tectonic, geomorphic, and volcanic interactions and the tempo of fault slip near Little Lake, California
Colin B. Amos, Sarah J. Brownlee, Sylan H. Rood, G. Burch Fisher, Roland Burgmann, Paul R. Renne, Angela S. Jayko
2013, Geological Society of America Bulletin (125) 1187-1202
New geochronologic and geomorphic constraints on the Little Lake fault in the Eastern California shear zone reveal steady, modest rates of dextral slip during and since the mid-to-late Pleistocene. We focus on a suite of offset fluvial landforms in the Pleistocene Owens River channel that formed in response to periodic...
Factors influencing the distribution of native bull trout and westslope cutthroat trout in western Glacier National Park, Montana
Vincent S. D'Angelo, Clint C. Muhlfeld
2013, Northwest Science (87) 1-11
The widespread declines of native bull trout (Salvelinus confluentus) and westslope cutthroat trout (Oncorhynchus clarkii lewisi) populations prompted researchers to investigate factors influencing their distribution and status in western Glacier National Park, Montana. We evaluated the association of a suite of abiotic factors (stream width, elevation, gradient, large woody debris...
Modeling rain-fed maize vulnerability to droughts using the standardized precipitation index from satellite estimated rainfall—Southern Malawi case study
Christopher C. Funk, James Verdin, Adams Chavula, Gregory J. Husak, Harikishan Jayanthi, Tamuka Magadzire
2013, International Journal of Disaster Risk Reduction (4) 71-81
During 1990s, disaster risk reduction emerged as a novel, proactive approach to managing risks from natural hazards. The World Bank, USAID, and other international donor agencies began making efforts to mainstream disaster risk reduction in countries whose population and economies were heavily dependent on rain-fed agriculture. This approach has more...
Operational evapotranspiration mapping using remote sensing and weather datasets: A new parameterization for the SSEB approach
Gabriel B. Senay, Stefanie Bohms, Ramesh K. Singh, Prasanna H. Gowda, Naga Manohar Velpuri, Henok Alemu, James P. Verdin
2013, Journal of the American Water Resources Association (49) 577-591
The increasing availability of multi-scale remotely sensed data and global weather datasets is allowing the estimation of evapotranspiration (ET) at multiple scales. We present a simple but robust method that uses remotely sensed thermal data and model-assimilated weather fields to produce ET for the contiguous United States (CONUS) at monthly...
Integrated coastal management in the Mississippi Delta: System functioning as the basis of sustainable management
John W. Day, John Barras, G. Paul Kemp, Robert R. Lane, William J. Mitsch, P.H. Templet
2013, Book chapter, Gulf of Mexico origin, waters, and biota, volume 4: Ecosystem-based management
No abstract available...
Legal, ethical, and procedural bases for the use of aseptic techniques to implant electronic devices
Daniel M. Mulcahy
2013, Journal of Fish and Wildlife Management (4) 211-219
The popularity of implanting electronic devices such as transmitters and data loggers into captive and free-ranging animals has increased greatly in the past two decades. The devices have become smaller, more reliable, and more capable (Printz 2004; Wilson and Gifford 2005; Metcalfe et al. 2012). Compared with externally mounted devices,...
The influence of coarse-scale environmental features on current and predicted future distributions of narrow-range endemic crayfish populations
Joseph J. Dyer, Shannon K. Brewer, Thomas A. Worthington, Elizabeth A. Bergey
2013, Freshwater Biology (58) 1071-1088
1.A major limitation to effective management of narrow-range crayfish populations is the paucity of information on the spatial distribution of crayfish species and a general understanding of the interacting environmental variables that drive current and future potential distributional patterns. 2.Maximum Entropy Species Distribution Modeling Software (MaxEnt) was used to predict...
Hyperpycnal plume-derived fans in the Santa Barbara Channel, California
Jonathan A. Warrick, Alexander R. Simms, Andy Ritchie, Elisabeth Steel, Pete Dartnell, James E. Conrad, David P. Finlayson
2013, Geophysical Research Letters (40) 2081-2086
Hyperpycnal gravity currents rapidly transport sediment across shore from rivers to the continental shelf and deep sea. Although these geophysical processes are important sediment dispersal mechanisms, few distinct geomorphic features on the continental shelf can be attributed to hyperpycnal flows. Here we provide evidence of large depositional features derived from...
Conservation status of freshwater gastropods of Canada and the United States
Paul D. Johnson, Arthur E. Bogan, Kenneth M. Brown, Noel M. Burkhead, James R. Cordeiro, Jeffrey T. Garner, Paul D. Hartfield, Dwayne A. Lepitzki, Gerry L. Mackie, Eva Pip, Thomas A. Tarpley, Jeremy S. Tiemann, Nathan V. Whelan, Ellen E. Strong
2013, Fisheries (38) 247-282
This is the first American Fisheries Society conservation assessment of freshwater gastropods (snails) from Canada and the United States by the Gastropod Subcommittee (Endangered Species Committee). This review covers 703 species representing 16 families and 93 genera, of which 67 species are considered extinct, or possibly extinct, 278 are endangered,...
Invasive zebra mussels (Driessena polymorpha) and Asian clams (Corbicula fluminea) survive gut passage of migratory fish species: implications for dispersal
Michael R. Gatlin, Daniel E. Shoup, James M. Long
2013, Biological Invasions (15) 1195-1200
The introduction and spread of invasive species is of great concern to natural resource managers in the United States. To effectively control the spread of these species, managers must be aware of the multitude of dispersal methods used by the organisms. We investigated the potential for survival through the gut...
Genetic and morphometric differences demonstrate fine-scale population substructure of the yellow perch Perca flavescens: need for redefined management units
Patrick M. Kocovsky, Timothy J. Sullivan, Carey T. Knight, Carol A. Stepien
2013, Journal of Fish Biology (82) 2015-2030
Whole-body morphometrics and 15 nuclear DNA microsatellite loci were analysed for 158 Perca flavescens collected during the spawning season from four spawning locations in central Lake Erie, two along the northern shore and two along the southern shore, to evaluate fine-scale variation (spanning 17-94 km). Results showed significant morphological and genetic...
Tree growth and competition in an old-growth Picea abies forest of boreal Sweden: influence of tree spatial patterning
Shawn Fraver, Anthony W. D’Amato, John B. Bradford, Bengt Gunnar Jonsson, Mari Jonsson, Per-Anders Esseen
2013, Journal of Vegetation Science (25) 374-385
Question: What factors best characterize tree competitive environments in this structurally diverse old-growth forest, and do these factors vary spatially within and among stands? Location: Old-growth Picea abies forest of boreal Sweden. Methods: Using long-term, mapped permanent plot data augmented with dendrochronological analyses, we evaluated the effect of neighbourhood competition on focal...
