The potential of high-frequency profiling to assess vertical and seasonal patterns of phytoplankton dynamics in lakes: An extension of the Plankton Ecology Group (PEG) model
Jennifer A. Brentrup, Craig E. Williamson, William Colom-Montero, Werner Eckert, Elvira de Eyto, Hans-Peter Grossart, Yannick Huot, Peter D. F. Isles, Lesley B. Knoll, Taylor H. Leach, Christopher G. McBride, Don Pierson, Francesco Pomati, Jordan S. Read, Kevin C. Rose, Nihar R. Samal, Peter A. Staehr, Luke A. Winslow
2016, Inland Waters (6) 565-580
The use of high-frequency sensors on profiling buoys to investigate physical, chemical, and biological processes in lakes is increasing rapidly. Profiling buoys with automated winches and sensors that collect high-frequency chlorophyll fluorescence (ChlF) profiles in 11 lakes in the Global Lake Ecological Observatory Network (GLEON) allowed the study of the...
Controls on the geochemical evolution of Prairie Pothole Region lakes and wetlands over decadal time scales
Martin B. Goldhaber, Christopher T. Mills, David M. Mushet, R. Blaine McCleskey, Jennifer Rover
2016, Wetlands (36) 255-272
One hundred sixty-seven Prairie Pothole lakes, ponds and wetlands (largely lakes) previously analyzed chemically during the late 1960’s and early to mid-1970’s were resampled and reanalyzed in 2011–2012. The two sampling periods differed climatically. The earlier sampling took place during normal to slightly dry conditions, whereas the latter occurred during...
Climate-induced warming of lakes can be either amplified or suppressed by trends in water clarity
Kevin C. Rose, Luke A. Winslow, Jordan S. Read, Gretchen J. A. Hansen
2016, Limnology and Oceanography Letters (1) 44-53
Climate change is rapidly warming aquatic ecosystems including lakes and reservoirs. However, variability in lake characteristics can modulate how lakes respond to climate. Water clarity is especially important both because it influences the depth range over which heat is absorbed, and because it is changing in many lakes. Here, we...
Eastern Whip-poor-wills (Antrostomus vociferus) are positively associated with low elevation forest In the central Appalachians
Christina L. Slover, Todd E. Katzner
2016, Wilson Journal of Ornithology (128) 846-856
Populations of the Eastern Whip-poor-will (Antrostomus vociferus) are thought to be declining because of a range of potential factors including habitat loss, pesticide use, and predation. However, this species is nocturnal and, as a consequence, it is poorly studied, and its population status is not well assessed by traditional diurnal...
Gray wolf exposure to emerging vector-borne diseases in Wisconsin with comparison to domestic dogs and humans
Rocio F. Jara, Adrian P. Wydeven, Michael D. Samuel
2016, PLoS ONE (11) 1-17
World-wide concern over emerging vector-borne diseases has increased in recent years for both animal and human health. In the United Sates, concern about vector-borne diseases in canines has focused on Lyme disease, anaplasmosis, ehrlichiosis, and heartworm which infect domestic and wild canids. Of these diseases, Lyme and anaplasmosis are also...
Spatial and ecological variation in dryland ecohydrological responses to climate change: implications for management
Kyle A. Palmquist, Daniel R. Schlaepfer, John B. Bradford, William K. Lauenroth
2016, Ecosphere (7)
Ecohydrological responses to climate change will exhibit spatial variability and understanding the spatial pattern of ecological impacts is critical from a land management perspective. To quantify climate change impacts on spatial patterns of ecohydrology across shrub steppe ecosystems in North America, we asked the following question: How will climate change...
Canada goose nest survival at rural wetlands in north-central Iowa
Brenna N. Ness, Robert W. Klaver
2016, Wildlife Society Bulletin (40) 705-713
The last comprehensive nest survival study of the breeding giant Canada goose (Branta canadensis maxima) population in Iowa, USA, was conducted >30 years ago during a period of population recovery, during which available nesting habitat consisted primarily of artificial nest structures. Currently, Iowa's resident goose population is stable and nests...
Assessment of trace element accumulation by earthworms in an orchard soil remediation study using soil amendments
Tiziana Centofantia, Rufus L. Chaney, W. Nelson Beyer, Laura L. McConnell, A. P. Davis, Dana Jackson
2016, Water, Air, & Soil Pollution (227)
This study assessed potential bioaccumulation of various trace elements in grasses and earthworms as a consequence of soil incorporation of organic amendments for in situ remediation of an orchard field soil contaminated with organochlorine and Pb pesticide residues. In this experiment, four organic amendments of differing total organic carbon content...
An experimental study of the role of subsurface plumbing on geothermal discharge
Atsuko Namiki, Yoshinori Ueno, Shaul Hurwitz, Michael Manga, Carolina Munoz-Saez, Fred Murphy
2016, Geochemistry, Geophysics, Geosystems (17) 3691-3716
In order to better understand the diverse discharge styles and eruption intervals observed at geothermal features, we performed three series of laboratory experiments with differing plumbing geometries. A single, straight conduit that connects a hot water bath (flask) to a vent (funnel) can originate geyser-like periodic eruptions, continuous discharge like...
Use of repeat surveys and flow and sediment transport modeling to support fish spawning reef placement in the Detroit River, MI
Paul J. Kinzel, Jonathan M. Nelson, Gregory W. Kennedy, David Bennion
2016, Conference Paper, Proceedings of River Flow 2016
The introduction of rock-rubble substrate in rivers, to enhance fish spawning habitat, represents a significant investment in planning, permitting and construction. Where river processes deposit sediment and cover the substrate, its value as fish spawning habitat can be diminished. Therefore, it is crucial in the site se-lection process, that substrate...
Trading shallow safety for deep sleep: Juvenile green turtles select deeper resting sites as they grow
Kristen M. Hart, Connor F. White, Autumn R. Iverson, Nick Whitney
2016, Endangered Species Research (31) 61-73
To better protect endangered green sea turtles Chelonia mydas, a more thorough understanding of the behaviors of each life stage is needed. Although dive profile analyses obtained using time-depth loggers have provided some insights into habitat use, recent work has shown that more fine-scale monitoring of body movements is needed...
Consequences of gas flux model choice on the interpretation of metabolic balance across 15 lakes
Hilary A. Dugan, R. Iestyn Woolway, Arianto Santoso, Jessica Corman, Aline Jaimes, Emily Nodine, Vijay P. Patil, Jacob A. Zwart, Jennifer A. Brentrup, Amy Hetherington, Samantha K. Oliver, Jordan S. Read, Kirsten Winter, Paul Hanson, Emily Read, Luke Winslow, Kathleen Weathers
2016, Inland Waters (6) 581-592
Ecosystem metabolism and the contribution of carbon dioxide from lakes to the atmosphere can be estimated from free-water gas measurements through the use of mass balance models, which rely on a gas transfer coefficient (k) to model gas exchange with the atmosphere. Theoretical and empirically based models of krange in complexity...
Iron and oxygen isotope signatures of the Pea Ridge and Pilot Knob magnetite-apatite deposits, southeast Missouri, USA
Tristan Childress, Adam C. Simon, Warren C. Day, Craig C. Lundstrom, Ilya N. Bindeman
2016, Economic Geology (111) 2033-2044
New O and Fe stable isotope ratios are reported for magnetite samples from high-grade massive magnetite of the Mesoproterozoic Pea Ridge and Pilot Knob magnetite-apatite ore deposits and these results are compared with data for other iron oxide-apatite deposits to shed light on the origin of the southeast Missouri deposits....
Response of fish assemblages to decreasing acid deposition in Adirondack Mountain lakes
Barry P. Baldigo, Karen Roy, Charles T. Driscoll
2016, NYSERDA Report 17-01
The CAA and other federal regulations have clearly reduced emissions of NOx and SOx, acidic deposition, and the acidity and toxicity of waters in the ALTM lakes, but these changes have not triggered widespread recovery of brook trout populations or fish communities. The lack of detectable biological recovery appears to...
Tree regeneration by seed in bottomland hardwood forests: A review
Whitney A. Kroschel, Sammy L. King, Richard F. Keim
2016, Southeastern Naturalist (15) 42-60
Bottomland hardwood forests (BLH) are found in temperate, humid regions of the southeastern US, primarily on alluvial floodplains adjacent to rivers. Altered hydrology in rivers and floodplains has caused changes in stand development and species composition of BLHs. We hypothesize that the driving mechanisms behind these changes are related to...
Survival and metamorphosis of larval sea lamprey (Petromyzon marinus) residing in Lakes Michigan and Huron near river mouths
Nicholas S. Johnson, Travis O. Brenden, William D. Swink, Mathew A. Lipps
2016, Journal of Great Lakes Research (42) 1461-1469
Although population demographics of larval lampreys in streams have been studied extensively, demographics in lake environments have not. Here, we estimated survival and rates of metamorphosis for larval sea lamprey (Petromyzon marinus) populations residing in the Great Lakes near river mouths (hereafter termed lentic areas). Tagged larvae were stocked and...
Panel regressions to estimate low-flow response to rainfall variability in ungaged basins
Maoya Bassiouni, Richard M. Vogel, Stacey A. Archfield
2016, Water Resources Research (52) 9470-9494
Multicollinearity and omitted-variable bias are major limitations to developing multiple linear regression models to estimate streamflow characteristics in ungaged areas and varying rainfall conditions. Panel regression is used to overcome limitations of traditional regression methods, and obtain reliable model coefficients, in particular to understand the elasticity of streamflow to rainfall....
A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to the 2014 Long Valley Caldera earthquake swarm
David R. Shelly, Jeanne L. Hardebeck, William L. Ellsworth, David P. Hill
2016, Journal of Geophysical Research B: Solid Earth (121) 8622-8641
In microseismicity analyses, reliable focal mechanisms can typically be obtained for only a small subset of located events. We address this limitation here, presenting a framework for determining robust focal mechanisms for entire populations of very small events. To achieve this, we resolve relative P and S wave polarities between...
Evaluating early-warning indicators of critical transitions in natural aquatic ecosystems
Alena Sonia Gsell, Ulrike Scharfenberger, Deniz Ozkundakci, Annika W. Walters, Lars-Anders Hansson, Annette B. G. Janssen, Peeter Noges, Philip Reid, Daniel Schindler, Ellen van Donk, Vasilis Dakos, Rita Adrian
2016, Proceedings of the National Academy of Sciences of the United States of America (113) E8089-E8095
Ecosystems can show sudden and persistent changes in state despite only incremental changes in drivers. Such critical transitions are difficult to predict, because the state of the system often shows little change before the transition. Early-warning indicators (EWIs) are hypothesized to signal the loss of system resilience and have been...
Adult nest attendance and diet of nestling Resplendent Quetzals (Pharomachrus mocinno) in the Talamanca Mountains of southern Cosa Rica
Scott A. Carleton
2016, Ornitologia Neotropical (27) 181-188
Resplendent Quetzals (Pharomachrus mocinno) inhabit mid to high elevation forests from southern Mexico to Panama. Lipid rich fruits from the Lauraceae family have been found to account for a large proportion of adult diet across their annual life cycle. To better understand the relationship between quetzals and Lauraceae during the...
Shallow and deep controls on lava lake surface motion at Kīlauea Volcano
Matthew R. Patrick, Tim R. Orr, Don Swanson, Einat Lev
2016, Journal of Volcanology and Geothermal Research (328) 247-261
Lava lakes provide a rare window into magmatic behavior, and lake surface motion has been used to infer deeper properties of the magmatic system. At Halema'uma'u Crater, at the summit of Kīlauea Volcano, multidisciplinary observations for the past several years indicate that lava lake surface motion can be broadly divided...
Statistically extracted fundamental watershed variables for estimating the loads of total nitrogen in small streams
Scott C. Kronholm, Paul D. Capel, Silvia Terziotti
2016, Environmental Modeling & Assessment (21) 681-690
Accurate estimation of total nitrogen loads is essential for evaluating conditions in the aquatic environment. Extrapolation of estimates beyond measured streams will greatly expand our understanding of total nitrogen loading to streams. Recursive partitioning and random forest regression were used to assess 85 geospatial, environmental, and watershed variables across 636...
Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri
Robert A. Ayuso, John F. Slack, Warren C. Day, Anne E. McCafferty
2016, Economic Geology (111) 1935-1962
Iron oxide-apatite and iron oxide-copper-gold deposits occur within ~1.48 to 1.47 Ga volcanic rocks of the St. Francois Mountains terrane near a regional boundary separating crustal blocks having contrasting depleted-mantle Sm-Nd model ages (TDM). Major and trace element analyses and Nd and Pb isotope data were obtained to characterize...
Semiautomatic mapping of permafrost in the Yukon Flats, Alaska
Mats Lundh Gulbrandsen, Burke J. Minsley, Lyndsay B. Ball, Thomas Mejer Hansen
2016, Geophysical Research Letters (43) 12131-12137
Thawing of permafrost due to global warming can have major impacts on hydrogeological processes, climate feedback, arctic ecology, and local environments. To understand these effects and processes, it is crucial to know the distribution of permafrost. In this study we exploit the fact that airborne electromagnetic (AEM) data are sensitive...
Reinforcement and validation of the analyses and conclusions related to fishway evaluation data from Bunt et al.: ‘Performance of fish passage structures at upstream barriers to migration’
C.M. Bunt, Theodore R. Castro-Santos, Alexander Haro
2016, River Research and Applications (32) 2125-2137
Detailed re-examination of the datasets that were used for a meta-analysis of fishway attraction and passage revealed a number of errors that we addressed and corrected. We subsequently re-analysed the revised dataset, and results showed no significant changes in the primary conclusions of the original study; for most species, effective...
