Establishing a baseline of estuarine submerged aquatic vegetation resources across salinity zones within coastal areas of the northern Gulf of Mexico
Eva R. Hillmann, Kristin DeMarco, Megan K. LaPeyre
2016, Journal of the Southeastern Association of Fish and Wildlife Agencies (3) 25-32
Coastal ecosystems are dynamic and productive areas that are vulnerable to effects of global climate change. Despite their potentially limited spatial extent, submerged aquatic vegetation (SAV) beds function in coastal ecosystems as foundation species, and perform important ecological services. However, limited understanding of the factors controlling SAV distribution and abundance...
Effects of a growth check on daily age estimates of age-0 alligator gar
Richard A. Snow, James M. Long
2016, Journal of the Southeastern Association of Fish and Wildlife Agencies (3) 6-10
Accurate age and growth information is essential for a complete knowledge of life history, growth rates, age at sexual maturity, and average life span in fishes. Alligator gar are becoming increasingly managed throughout their range and because this species spawns in backwater flooded areas, their offspring are prone to stranding...
Small mammal communities in eastern redcedar forest
Christopher J. Reddin, David G. Krementz
2016, American Midland Naturalist (175) 113-119
Eastern redcedar (Juniperus virginiana) is a fire-intolerant tree species that has encroached into grassland ecosystems throughout central and eastern North America. Many land managers are interested in removing eastern redcedar to restore native grasslands. We surveyed small mammals using mark-recapture methods in eastern redcedar forest, warm-season grassland, and oldfield habitats...
The value of closed-circuit rebreathers for biological research
Richrad L. Pyle, Phillip S. Lobel, Joseph A. Tomoleoni
2016, Conference Paper, Rebreathers and Scientific Diving. Proceedings of NPS/NOAA/DAN/AAUS
Closed-circuit rebreathers have been used for underwater biological research since the late 1960s, but have only started to gain broader application within scientific diving organizations within the past two decades. Rebreathers offer certain specific advantages for such research, especially for research involving behavior and surveys that depend on unobtrusive observers...
Deserts
Jayne Belnap, Robert H. Webb, Todd Esque, Matthew L. Brooks, Lesley A. DeFalco, James A. MacMahon
2016, Book chapter, Ecosystems of California
The deserts of California (Lead photo, Fig. 1) occupy approximately 38% of California’s landscape (Table 1) and consist of three distinct deserts: the Great Basin Desert, Mojave Desert, and Colorado Desert, the latter of which is a subdivision of the Sonoran Desert (Brown and Lowe 1980). The wide range of...
Polyoxyethylene tallow amine, a glyphosate formulation adjuvant: Soil adsorption characteristics, degradation profile, and occurrence on selected soils from agricultural fields in Iowa, Illinois, Indiana, Kansas, Mississippi, and Missouri
Daniel L. Tush, Michael T. Meyer
2016, Environmental Science & Technology (50) 5781-5789
Polyoxyethylene tallow amine (POEA) is an inert ingredient added to formulations of glyphosate, the most widely applied agricultural herbicide. POEA has been shown to have toxic effects to some aquatic organisms making the potential transport of POEA from the application site into the environment an important concern. This study characterized...
Structural geometry of the Valley and Ridge and Plateaus provinces
Mark A. Evans, Randall C. Orndorff, William S. Henika
2016, Book chapter, The geology of Virginia (Virginia Museum of Natural History Special Publication 18)
The Valley and Ridge physiographic province comprises the area between the Blue Ridge province on the east and the Appalachian Plateau province on the west. The province consists of Paleozoic carbonate and clastic rocks that were folded and thrust faulted during the Alleghanian orogeny. The Appalachian Plateau province consists of mostly flat lying to gently...
Fledgling survival increases with development time and adult survival across north and south temperate zones
Penn Lloyd, Thomas E. Martin
2016, Ibis (158) 135-143
Slow life histories are characterized by high adult survival and few offspring, which are thought to allow increased investment per offspring to increase juvenile survival. Consistent with this pattern, south temperate zone birds are commonly longer-lived and have fewer young than north temperate zone species. However, comparative analyses of juvenile...
Hematology results from experimental exposure of sandhill cranes to West Nile virus
Glenn H. Olsen
2016, Conference Paper, Proceedings of the North American Crane Workshop
West Nile virus is a deadly virus for young cranes. In testing two different vaccines on both adult sandhill cranes (Grus canadensis), we discovered that some blood parameters are altered by exposure to the virus. White blood cell counts were the most obvious, and may be used as an indicator...
Photoperiod and nesting phenology of whooping cranes at two captive sites
Glenn H. Olsen
2016, Conference Paper, Proceedings of the North American Crane Workshop
Increasing daylight is known to be a breeding stimulus in many avian species breeding in northern latitudes. This is thought to be true for cranes that breed in such latitudes including the Whooping Crane (Grus americana). For this reason, the captive breeding centers use artificial light to lengthen daylight hours,...
Nutrient dynamics of the Delta: Effects on primary producers
Clifford N. Dahm, Alexander E. Parker, Anne E. Adelson, Mairgareth A. Christman, Brian A. Bergamaschi
2016, San Francisco Estuary and Watershed Science (14)
Increasing clarity of Delta waters, the emergence of harmful algal blooms, the proliferation of aquatic water weeds, and the altered food web of the Delta have brought nutrient dynamics to the forefront. This paper focuses on the sources of nutrients, the transformation and uptake of nutrients, and the links of...
Animated tectonic reconstruction of the Lower Colorado River region: Implications for Late Miocene to Present deformation
Scott E.K. Bennett, Michael H. Darin, Rebecca J. Dorsey, Lisa A. Skinner, Paul J. Umhoefer, Michael E. Oskin
2016, Conference Paper, Going LOCO Investigations along the Lower Colorado River - 2016 Desert Symposium Field Guide and Proceedings
Although the majority of late Miocene to present Pacific-North America plate boundary strain has been accommodated by faults of the San Andreas and Gulf of California systems, growing evidence of dextral shear east of the San Andreas Fault indicates that a component of plate boundary deformation occurred in the lower...
Ecological resilience
Craig R. Allen, Ahjond S. Garmestiani, Shana Sundstrom, David G. Angeler
2016, Book chapter, IRGC resource guide on resilience
Resilience is the capacity of complex systems of people and nature to withstand disturbance without shifting into an alternate regime, or a different type of system organized around different processes and structures (Holling, 1973). Resilience theory was developed to explain the non-linear dynamics of complex adaptive systems, like social-ecological systems...
LakeMetabolizer: An R package for estimating lake metabolism from free-water oxygen using diverse statistical models
Luke Winslow, Jacob A. Zwart, Ryan D. Batt, Hilary Dugan, R. Iestyn Woolway, Jessica Corman, Paul C. Hanson, Jordan S. Read
2016, Inland Waters (6) 622-636
Metabolism is a fundamental process in ecosystems that crosses multiple scales of organization from individual organisms to whole ecosystems. To improve sharing and reuse of published metabolism models, we developed LakeMetabolizer, an R package for estimating lake metabolism from in situ time series of dissolved oxygen, water temperature, and, optionally, additional environmental...
A tube seepage meter for in situ measurement of seepage rate and groundwater sampling
John E. Solder, Troy E. Gilmore, David P. Genereux, D. Kip Solomon
2016, Groundwater (54) 588-595
We designed and evaluated a “tube seepage meter” for point measurements of vertical seepage rates (q), collecting groundwater samples, and estimating vertical hydraulic conductivity (K) in streambeds. Laboratory testing in artificial streambeds show that seepage rates from the tube seepage meter agreed well with expected values. Results of field testing...
Influence of basin- and local-scale environmental conditions on nearshore production in the northeast Pacific Ocean
Vanessa R. von Biela, Christian E. Zimmerman, Gordon H. Kruse, Franz J. Mueter, Bryan A. Black, David C. Douglas, James L. Bodkin
2016, Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science (8) 502-521
Nearshore marine habitats are productive and vulnerable owing to their connections to pelagic and terrestrial landscapes. To understand how ocean basin- and local-scale conditions may influence nearshore species, we developed an annual index of nearshore production (spanning the period 1972–2010) from growth increments recorded in otoliths of representative pelagic-feeding (Black...
Predictive habitat models derived from nest-box occupancy for the endangered Carolina northern flying squirrel in the southern Appalachians
W. Mark Ford, A.M. Evans, Richard H. Odom, Jane L. Rodrigue, C.A. Kelly, Nicole Abaid, Corinne A. Diggins, Doug Newcomb
2016, Endangered Species Research (27) 131-140
In the southern Appalachians, artificial nest-boxes are used to survey for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus), a disjunct subspecies associated with high elevation (>1385 m) forests. Using environmental parameters diagnostic of squirrel habitat, we created 35 a priori occupancy models in the program PRESENCE for boxes surveyed in...
The swing of it: Hammock camping
Jeffrey L. Marion
2016, A.T. Journeys (Spring 2016) 12-18
Hammock camping is dramatically expanding along the Appalachian Trail and raising both questions and concerns among Trail land managers, club members, and backpackers. This article examines some of the advantages and disadvantages of hammock camping, including resource and social impacts. Some Leave No Trace hammock camping practices are included for...
Synthesis of juvenile lamprey migration and passage research and monitoring at Columbia and Snake River Dams
Matthew G. Mesa, Lisa K. Weiland, Helena E. Christiansen
2016, Report
We compiled and summarized previous sources of data and research results related to the presence, numbers, and migration timing characteristics of juvenile (eyed macropthalmia) and larval (ammocoetes) Pacific lamprey Entosphenus tridentatus, in the Columbia River basin (CRB). Included were data from various screw trap collections, data from historic fyke net...
Ecohydrology and Its Relation to Integrated Groundwater Management
Randall J. Hunt, Masaki Hayashi, Okke Batelaan
2016, Book chapter, Integrated Groundwater Management
In the twentieth century, groundwater characterization focused primarily on easily measured hydraulic metrics of water storage and flows. Twenty-first century concepts of groundwater availability, however, encompass other factors having societal value, such as ecological well-being. Effective ecohydrological science is a nexus of fundamental understanding derived from two scientific disciplines: (1)...
Groundwater regulation and integrated planning
Philippe Quevauviller, Okke Batelaan, Randall J. Hunt
2016, Book chapter
The complex nature of groundwater and the diversity of uses and environmental interactions call for emerging groundwater problems to be addressed through integrated management and planning approaches. Planning requires different levels of integration dealing with: the hydrologic cycle (the physical process) including the temporal dimension; river basins and aquifers (spatial...
Integrated groundwater management: An overview of concepts and challenges
Anthony J. Jakeman, Olivier Barreteau, Randall J. Hunt, Jean-Daniel Rinaudo, Andrew Ross
Anthony J. Jakeman, Olivier Barreteau, Randall J. Hunt, Jean-Daniel Rinaudo, Andrew Ross, editor(s)
2016, Book chapter, Integrated groundwater management
Managing water is a grand challenge problem and has become one of humanity’s foremost priorities. Surface water resources are typically societally managed and relatively well understood; groundwater resources, however, are often hidden and more difficult to conceptualize. Replenishment rates of groundwater cannot match past and current rates of depletion in...
Coral calcification and ocean acidification
Paul L. Jokiel, Christopher P. Jury, Ilsa B. Kuffner
2016, Book chapter, Coral reefs at the crossroads
Over 60 years ago, the discovery that light increased calcification in the coral plant-animal symbiosis triggered interest in explaining the phenomenon and understanding the mechanisms involved. Major findings along the way include the observation that carbon fixed by photosynthesis in the zooxanthellae is translocated to animal cells throughout the colony...
Volcanogenic massive sulphide and orogenic gold deposits of northern southeast Alaska
Patrick J Sack, Susan M. Karl, Nathan Steeves, J Bruce Gemmell
2016, Book
This five-day field trip visits the most significant mineral deposits in northern southeast Alaska. The trip begins and ends with regional transects in the interior Intermontane terranes around Whitehorse, Yukon, and the Insular terranes along the northern Chatham Strait region of southeast Alaska (Fig. A-1 and Fig. A-2; Plate-1). To...
Dominance of 'Gallionella capsiferriformans' and heavy metal association with Gallionella-like stalks in metal-rich pH 6 mine water discharge
Maria Fabisch, Gina Freyer, Carol A. Johnson, Georg Buchel, Denise M. Akob, Thomas R. Neu, Kirsten Kusel
2016, Geobiology (14) 68-90
Heavy metal-contaminated, pH 6 mine water discharge created new streams and iron-rich terraces at a creek bank in a former uranium-mining area near Ronneburg, Germany. The transition from microoxic groundwater with ~5 mm Fe(II) to oxic surface water may provide a suitable habitat for microaerobic iron-oxidizing bacteria (FeOB). In this study,...
