Exploring the potential value of satellite remote sensing to monitor chlorophyll-a for U.S. lakes and reservoirs
Michael Papenfus, Blake Schaeffer, Amina Pollard, Keith A. Loftin
2020, Environmental Monitoring and Assessment (192)
Assessment of chlorophyll-a, an algal pigment, typically measured by field and laboratory in situ analyses, is used to estimate algal abundance and trophic status in lakes and reservoirs. In situ-based monitoring programs can be expensive, may not be spatially, and temporally comprehensive and results may not...
Infectious diseases in Yellowstone’s wolves
Ellen E. Brandell, Emily S. Almberg, Paul C. Cross, Andrew P Dobson, Douglas W. Smith, Peter J. Hudson
2020, Book chapter, Yellowstone wolves: Science and discovery in the world's first national park
No abstract available....
Beyond neonicotinoids – Wild pollinators are exposed to a range of pesticides while foraging in agroecosystems
A.R. Main, Michelle L. Hladik, Elisabeth B. Webb, K. W. Goyne, D. Mengel
2020, Science of the Total Environment (742)
Pesticide exposure is a growing global concern for pollinator conservation. While most current pesticide studies have specifically focused on the impacts of neonicotinoid insecticides toward honeybees and some native bee species, wild pollinators may be exposed to a broader range of agrochemicals. In 2016 and 2017 we collected a total...
Bioaccumulation of the pesticide imidacloprid in stream organisms and sublethal effects on salamanders
Sara M. Crayton, Petra B. Wood, Donald J. Brown, Alice R. Millikin, Terence J. McManus, Tyler J. Simpson, Kang-Mo Ku, Yong-Lak Park
2020, Global Ecology and Conservation (24) 1-15
Neonicotinoids are one of the most widely used classes of insecticides in the world. The neonicotinoid imidacloprid is commonly applied to hemlock (Tsuga spp.) stands in eastern North America to reduce tree mortality from infestations of the invasive hemlock woolly adelgid (HWA; Adelges tsugae). While laboratory and mesocosm studies have determined...
Council Monitoring and Assessment Program (CMAP): User guide for the Gulf Coast Monitoring and Assessment Portal
Kevin Suir, Hana R. Thurman, Anthony Kuczynski, Philip Quibodeaux, Sumani Chimmula, Jake Howell, Heidi Burkart, Nicholas Enwright, Kari Cretini, Mark McKelvy
2020, Report
The Resources and Ecosystems Sustainability, Tourist Opportunities, and Revived Economies of the Gulf Coast States Act (RESTORE Act Final Rule at 31 C.F.R. Part 34) was signed into law on July 6, 2012. The RESTORE Act calls for a regional approach to restoring the long-term health of the valuable natural...
Comparing native bee communities on reconstructed and remnant prairie in Missouri
J. P. LaRose, Elisabeth B. Webb, D. L. Finke
2020, Prairie Naturalist (52) 33-44
The tallgrass prairie of North America is an imperiled ecosystem that has been the subject of considerable restoration effort and research in the past two decades. While native prairie plant species are purposely introduced during restoration, prairie invertebrates, including native bees (Anthophila), are not, and must colonize from surrounding remnants....
Coleonyx variegatus (Western Banded Gecko). Sterility
Phil A. Medica
2020, Herpetological Review (51) 847-848
No abstract available....
North American commission on stratigraphic nomenclature report 14 – Revision of articles 25-27 of the North American stratigraphic code to formalize subseries and subepochs
Marie-Pierre Aubry, Richard H. Fluegeman, Lucy E. Edwards, Brian R. Pratt, Carlton E. Brett
2020, Stratigraphy (17) 315-316
At the 75th Annual Meeting of the North American Commission on Stratigraphic Nomenclature, 22 October, 2020, in connection with GSA 2020 Connects Online, the Commission voted unanimously to accept the revision of Articles 73, 81 and 82 of the North American Stratigraphic Code (North American Commission on Stratigraphic Nomenclature, 2005...
An evaluation of noninvasive sampling techniques for Malayan sun bears
Thye Lim Tee, Wai Ling Lai, Terence Kok Ju Wei, Ooi Zhuan Shern, Frank T. van Manen, Stuart P. Sharp, Siew Te Wong, Jactty Chew, Shyamala Ratnayeke
2020, Ursus (31)
Traditional mark–recapture studies to estimate abundance and trends of Malayan sun bear (Helarctos malayanus) populations are impeded by logistics of live-trapping wild individuals. The development of noninvasive sampling techniques for monitoring sun bear populations is therefore crucial for targeted conservation action. Sun bears have short fur, and conventional hair-snagging devices...
A test of the Niche Variation Hypothesis in a ruminant herbivore
Brett R. Jesmer, Matthew Kauffman, Melanie A. Murphy, Jacob R. Goheen
2020, Journal of Animal Ecology (89) 2825-2839
Despite the shared prediction that the width of a population's dietary niche expands as food becomes limiting, the Niche Variation Hypothesis (NVH) and Optimal Foraging Theory (OFT) offer contrasting views about how individuals alter diet selection when food is limited.Classical OFT predicts that dietary preferences do not change as...
Ecological risk assessment of environmental stress and bioactive chemicals to riverine fish populations: An individual-based model of smallmouth bass Micropterus dolomieu
Yan Li, Vicki S. Blazer, Luke R. Iwanowicz, Megan K. Schall, Kelly Smalling, Donald E. Tillitt, Tyler Wagner
2020, Ecological Modelling (438) 1-16
Ecological risk assessments play an important role in environmental management and decision-making. Although empirical measurements of the effects of habitat changes and chemical exposure are often made at molecular and individual levels, environmental decision-making often requires the quantification of management-relevant, population-level outcomes....
Relative reproductive phenology and synchrony affect neonate survival in a nonprecocial ungulate
Eric S. Michel, Bronson K. Strickland, Stephen Demarais, Jerrold L. Belant, Todd M. Kautz, Jared F. Duquette, Dean E. Beyer Jr., Michael J. Chamberlain, Karl V. Miller, Rebecca M. Shuman, John C. Kilgo, Duane R. Diefenbach, Bret D. Wallingford, Justin K. Vreeland, Stephen S. Ditchkoff, Christopher S. DePerno, Christopher E. Moorman, M. Colter Chitwood, Marcus A. Lashley
2020, Functional Ecology (34) 2536-2547
Degree of reproductive synchronization in prey is hypothesized as a predator defense strategy reducing prey risk via predator satiation or predator avoidance. Species with precocial young, especially those exposed to specialist predators, should be highly synchronous to satiate predators (predator satiation hypothesis), while prey with nonprecocial (i.e. altricial) young, especially...
USGS Telemetry Project
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Douglas Appel, Enrika Hlavacek, James J. Duncker
2020, Report, Interim summary report 2020
Telemetry of acoustically tagged bigheaded carp (i.e., bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix) and surrogate fish species has become an invaluable tool in management for these species in the upper Illinois Waterway Systems (i.e., upper Illinois River, lower Des Plaines River, and Chicago Area Waterway System). For...
Book review: Rare earth element resources: Indian context
Philip Verplanck
2020, Economic Geology (115) 1875-1876
Rare Earth Element Resources: Indian Context. Yamuna Singh. 2020. ISBN 978-3-030-41353-8. Society of Earth Scientists Series, Springer, Cham, Switzerland, 269 Pp. Hardcover and eBook. €93.08Rare Earth Element Resources: Indian Context by Yamuna Singh provides an excellent review of rare...
Forest canopy gap dynamics: Quantifying forest gaps and understanding gap – level forest regeneration in Upper Mississippi River floodplain forests
Lyle J. Guyon, Andrew C. Strassman, Alexandra Oines, Andrew R. Meier, Meredith Thomsen, Stepahnie R Sattler, Nathan R. De Jager, Erin E. Hoy, Benjamin J. Vandermyde, Robert J. Cosgriff
2020, Completion Report SOW2019FG5
In most forest systems, the dynamics of forest canopy gap development play an important role in the transition from relatively short-lived early successional tree species to longer-lived, late successional tree species. In resilient forest systems, tree seedlings establish within newly created canopy gaps and grow to close the gap within...
A multispecies approach to manage effects of land cover and weather on upland game birds
A.R. Schindler, David A. Haukos, C.A. Hagen, Beth Ross
2020, Ecology and Evolution (10) 14330-14345
Loss and degradation of grasslands in the Great Plains region have resulted in major declines in abundance of grassland bird species. To ensure future viability of grassland bird populations, it is crucial to evaluate specific effects of environmental factors among species to determine drivers of population decline and develop effective...
Changing nitrogen inputs to the northern San Francisco Estuary: Potential ecosystem responses and opportunities for investigation
David Senn, Tamara E. C. Kraus, Amy Richey, Brian A. Bergamaschi, Larry R. Brown, Louise Conrad, Christopher A. Francis, Wim Kimmerer, Raphael Kudela, Timothy G. Otten, Alexander E. Parker, April Robinson, Anke Mueller-Solger, Dylan Stern, Janet Thompson
2020, SFEI Contribution 973
Anthropogenic activities have resulted in elevated ambient nitrogen (N) and phosphorus (P) concentrations in many regions of the Sacramento-San Joaquin Delta and Suisun Bay (northern San Francisco Estuary, (nSFE). The Sacramento Regional wastewater treatment plant (SRWTP WWTP) currently acts as the largest N point source to the system, discharging 13,000-15,000...
Development and application of an empirical dune growth model for evaluating barrier island recovery from storms
Patricia (Soupy) Dalyander, Rangley C. Mickey, Davina Passeri, Nathaniel G. Plant
2020, Journal of Marine Science and Engineering (8)
Coastal zone managers require models that predict barrier island change on decadal time scales to estimate coastal vulnerability, and plan habitat restoration and coastal protection projects. To meet these needs, methods must be available for predicting dune recovery as well as dune erosion. In the present study, an empirical dune...
Resist-accept-direct (RAD)-A framework for the 21st-century natural resource manager
Gregor W. Schuurman, Cat Hawkins Hoffman, David N. Cole, David J. Lawrence, John M. Morton, Dawn R. Magness, Amanda E. Cravens, Scott Covington, Robin O'Malley, Nicholas A. Fisichelli
2020, Natural Resource Report 2020/2213
An assumption of stationarity—i.e. “the idea that natural systems fluctuate within an unchanging envelope of variability” (Milly et al. 2008)—underlies traditional conservation and natural resource management, as evidenced by widespread reliance on ecological baselines to guide protection, restoration, and other management. Although ecological change certainly occurred under the relatively stable...
Planetary cave exploration progresses
Timothy N. Titus, C. M. Phillips-Lander, P. J. Boston, J. J. Wynne, L. Kerber
2020, Eos, Earth and Space Science News (101)
Planetary caves have been identified on the Moon and on Mars, and are likely to occur across the Solar System. They present a new frontier for planetary science, subsurface astrobiology, geology and human exploration. The fourth in a series of scientific meetings focusing on the science and exploration of planetary...
Water levels and selected water-quality conditions in the Mississippi River Valley alluvial aquifer in eastern Arkansas, 2014
Kirk D. Rodgers, Amanda R. Whaling
2020, Scientific Investigations Report 2020-5123
In 2014, the U.S. Geological Survey, in cooperation with the Arkansas Geological Survey and the Arkansas Natural Resources Commission, determined water-level altitudes in 468 wells in eastern Arkansas and collected water-quality samples from 144 wells. Water-level altitudes were calculated based on the measured depth to water in each well and...
Assessment of undiscovered oil and gas resources in the Mancos-Menefee composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado, 2020
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake II
2020, Fact Sheet 2020-3049
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 12 million barrels of oil and 27 trillion cubic feet of gas in the Mancos-Menefee Composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado....
Assessment of undiscovered gas resources in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado, 2020
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake II
2020, Fact Sheet 2020-3048
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.6 trillion cubic feet of gas in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado....
Assessment of undiscovered gas resources of the Fruitland Total Petroleum System, San Juan Basin Province, New Mexico and Colorado, 2020
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake II
2020, Fact Sheet 2020-3047
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 39 trillion cubic feet of gas within continuous and conventional reservoirs of the Fruitland Total Petroleum System in the San Juan Basin Province, New Mexico and Colorado....
Behavior at short temporal scales drives dispersal dynamics and survival in a metapopulation of brook trout (Salvelinus fontinalis)
Tyler Wagner, Shannon White
2020, Freshwater Biology (66) 278-285
1) Movement has been studied extensively in stream salmonids, and most data suggest that population-level behavior is best described by a leptokurtic distribution. This distribution emphasizes the large proportion of sedentary individuals in a population, which can implicitly lead to assumptions of low population connectivity and overlook the ecological significance...
