Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (391)
- Environmental Sciences (388)
- Life Sciences (309)
- International and Area Studies (272)
- Biodiversity (270)
-
- Animal Sciences (268)
- Asian Studies (266)
- Other Animal Sciences (256)
- Public Affairs, Public Policy and Public Administration (122)
- Environmental Studies (117)
- Environmental Policy (116)
- Natural Resources Management and Policy (116)
- Other Environmental Sciences (113)
- Physical and Environmental Geography (112)
- Recreation, Parks and Tourism Administration (111)
- Public Administration (110)
- Environmental Education (109)
- Fire Science and Firefighting (109)
- Natural Resource Economics (108)
- Leisure Studies (107)
- Ecology and Evolutionary Biology (100)
- Zoology (73)
- Terrestrial and Aquatic Ecology (70)
- Plant Sciences (52)
- Desert Ecology (50)
- Population Biology (37)
- Ornithology (27)
- Keyword
-
- Mongolia (91)
- United States (50)
- Nebraska (37)
- Distribution (23)
- Plant communities (22)
-
- Ecology (16)
- Agate Fossil Beds National Monument (13)
- Equus hemionus (13)
- Bats (11)
- Scotts Bluff National Monument (11)
- Taxonomy (11)
- Homestead National Monument (9)
- Northern Great Plains (9)
- Chiroptera (8)
- Behavior (7)
- Ectoparasites (7)
- Reproduction (7)
- Tallgrass Prairie National Preserve (7)
- Gobi (6)
- Khulan (6)
- Kiang (6)
- Mongolei (6)
- Vegetation classification (6)
- Asiatic wild ass (5)
- Avifauna (5)
- Conservation (5)
- Equus hemionus hemionus (5)
- Home range (5)
- Mammals (5)
- Morphology (5)
- Publication Year
- Publication
-
- Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298 (266)
- United States National Park Service: Publications (109)
- School of Global Integrative Studies: Faculty Publications (4)
- Department of Geography: Dissertations, Theses, and Student Research (3)
- Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023– (3)
-
- Department of Anthropology: Faculty Publications (2)
- School of Natural Resources: Faculty Publications (2)
- Zea E-Books Collection (2)
- Community and Regional Planning Program: Professional Projects (1)
- Community and Regional Planning Program: Theses (1)
- Department of Communication Studies: Dissertations, Theses, and Student Research (1)
- Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research (1)
- Department of English: Dissertations, Theses, and Student Research (1)
- Department of Environmental Studies: Undergraduate Student Theses (1)
- Department of History: Dissertations, Theses, and Student Research (1)
- Great Plains Quarterly (through 2013) (1)
- Great Plains Research: A Journal of Natural and Social Sciences (through 2013) (1)
- Harold W. Manter Laboratory of Parasitology: Faculty Publications (1)
- National Drought Mitigation Center: Faculty Publications (1)
- National Invasive Species Council (1)
- School of Natural Resources: Dissertations, Theses, and Student Research (1)
- UNL Faculty Course Portfolios (1)
- United States Department of Agriculture Wildlife Services: Staff Publications (1)
- University of Nebraska-Lincoln Libraries: Faculty Publications (1)
- Publication Type
Articles 31 - 60 of 407
Full-Text Articles in Nature and Society Relations
Biological Activity Of Saussurea Amara (L.) Dc., Shagjjav Oyungerel
Biological Activity Of Saussurea Amara (L.) Dc., Shagjjav Oyungerel
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The medicinal application of specific plants over the long period in traditional medicine, suggests the presence of biologically active substances in those plant species. Saussurea amara (L.) DC. is a wild plant with a high feeding value because of its high protein content, vitamins, and minerals. S. amara is used in the traditional Mongolian medicine for the treatment of hepato-biliary disorders. The goal of this study was to evaluate the antioxidant and antimicrobial activities of S. amara. The antioxidant capacity of a methanol extract of plants was evaluated by analyzing its DPPH free-radical scavenging activity and reducing power …
The Formation Of Aufeis And Its Impact On Infrastructure Around Ulaanbaatar, North-Central Mongolia, Michael Walther, Vanchindorj Batsaikhan, Avirmed Dashtseren, Yamkhin Jambaljav, Khurelbaatar Temujin, Ganbold Ulanbayar, Ulrich Kamp
The Formation Of Aufeis And Its Impact On Infrastructure Around Ulaanbaatar, North-Central Mongolia, Michael Walther, Vanchindorj Batsaikhan, Avirmed Dashtseren, Yamkhin Jambaljav, Khurelbaatar Temujin, Ganbold Ulanbayar, Ulrich Kamp
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
In this study aufeis features and their formation under natural conditions and in an urban surrounding in north-central Mongolia were investigated. Used methods included field observations, Electrical Resistivity Tomography (ERT) as well as analyses of satellite imagery and meteorological data. Aufeis formation is related to streams, springs, and ground conditions, particularly soil moisture; the formation of both spring aufeis and river aufeis follows a seasonal cycle. The meteorological data from 1969 to 2018 indicate that the mean annual air temperature (MAAT) increased by 2.6 °C, whilst no significant changes were observed for precipitation. Between 1992 and 2018, aufeis areas significantly …
Peter Hanelt: Ein Großer Wissenschaftler Und Mensch Ist Von Uns Gegangen, Ingo Schubert, Klaus Pistrick
Peter Hanelt: Ein Großer Wissenschaftler Und Mensch Ist Von Uns Gegangen, Ingo Schubert, Klaus Pistrick
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Am 21. Oktober 2019 vollendete sich nach längerer Krankheit das Leben von Dr. habil. Peter Hanelt. Peter Hanelt wurde am 5. Dezember 1930 im niederschlesischen Görlitz als einziges Kind des Kaufmanns Fritz Hanelt und seiner Ehefrau Margarete geboren. Früh wurde Peter in die Unternehmungen der Eltern im Kanusportverband und im Wanderverein einbezogen, die bald seine Begeisterung weckten. Der Vater nahm ihn schon als Schüler mit zu Vorträgen in das Görlitzer Naturkundemuseum. Auf Exkursionen in die Umgebung von Görlitz beeindruckten ihn am Löbauer Wasser die Süßwasserschwämme und in den Königshainer Bergen der nächtliche Gesang des Ziegenmelkers. So entstand früh eine lebenslange …
In Memoriam Prof. H.C. Dr. Mathias Kiefer † (1943 – 2019), Michael Stubbe, Annegret Stubbe
In Memoriam Prof. H.C. Dr. Mathias Kiefer † (1943 – 2019), Michael Stubbe, Annegret Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Am 15.06.2019 vollendete sich nach langer schwerer Krankheit der Lebenszyklus von Mathias Kiefer. Seiner Frau und seinem Sohn Daniel sind wir für wertvolle Daten aus der Vita des Verstorbenen zu großem Dank verbunden. Mathias Kiefer wurde am 25. März 1943 im slowakischen Kežmarok geboren, wo er auch seine Schulausbildung erhielt. Von 1961 bis 1966 erfolgte an der Naturwissenschaftlichen Fakultät der Comenius-Universität von Bratislava sein Biologiestudium, das er mit dem Diplom (Fachrichtung Parasitologie) abschloss.
Erforschung Biologischer Ressourcen Der Mongolei, Band 14 = Exploration Into The Biological Resources Of Mongolia, Volume 14 [Front Matter]
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Title page, verso of the title page, and table of contents for Erforschung biologischer Ressourcen der Mongolei, Band 14 = Exploration into the Biological Resources of Mongolia, Volume 14 (2021), also referred to as the Black Journal.
Herausgeber:
Annegret Stubbe (Halle/Saale)
Petra Kaczensky (Wien)
Karsten Wesche (Görlitz)
Ravčigijn Samjaa (Ulaanbaatar)
Michael Stubbe (Halle/Saale)
Richard P. Reading (Denver)
Scott L. Gardner (Lincoln)
Choima Dulamsuren (Freiburg)
Schriftleitung:
Annegret Stubbe Martin-Luther-Universität Halle Wittenberg, Halle (Saale) 2021
The House Mouse Mus Musculus In Mongolia: Taxonomy, Status, And Ecology Of A Neglected Species, Rico Appenborn, Katrin Lammers, Bettina Harr, Davaa Lkhagvasuren, Ravchig Samiya, Michael Stubbe, Hermann Ansorge
The House Mouse Mus Musculus In Mongolia: Taxonomy, Status, And Ecology Of A Neglected Species, Rico Appenborn, Katrin Lammers, Bettina Harr, Davaa Lkhagvasuren, Ravchig Samiya, Michael Stubbe, Hermann Ansorge
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Although the house mouse as a common and widely distributed species is probably best-studied among small mammals, there is a lack of fundamental knowledge regarding species identity, morphology and ecology in Mongolia. Consequently, this study provides results of basic biological research on the Mongolian house mouse. A total of 172 specimens have been studied based on samples collected during the period 1962 to 2016. Using genetic and morphological markers, the taxonomic examination resulted in classification as Mus musculus musculus LINNAEUS, 1758. To characterize the Mongolian house mouse, three fur color traits and 23 metric body and skull traits were analyzed. …
The Corvonirmus Group (Insecta, Psocodea, Phthiraptera, Ischnocera) Of Corvids (Aves, Corvidae). I. Stubbenirmus Gen. Nov., Eberhard Mey
The Corvonirmus Group (Insecta, Psocodea, Phthiraptera, Ischnocera) Of Corvids (Aves, Corvidae). I. Stubbenirmus Gen. Nov., Eberhard Mey
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
1. The genera Corvonirmus Eichler, 1944 (with 11 spp.), Hecatrishula Gustafsson & Bush, 2017 (with 8 spp.), and Lycocoranirmus Mey, 2017 (with 5 spp.), which belong to the Brueelia complex (Philopteridae s. l.), are morpho-structurally characterized mainly by head structures and chaetotaxy. They are defined as a group of related taxa that should be placed in the rank of a subfamily (Corvonirminae subfam. nov.) if the former Brueeliinae sensu EICHLER (1963:177) would get the status of a separate family (Brueeliidae).
2. Within the Corvonirmus group, the former Hecatrishula biguttata species group is assumed to be classified as new …
Phylogenie, Morphologie Und Ökologie Mongolischer Langohrfledermäuse Der Gattung Plecotus (Mammalia, Chiroptera, Vespertilionidae), Dietrich Dolch, Bernd Gärtner, Klaus Thiele, Dirk Steinhauser, Ariunbold Jargalsaikhan, Annegret Stubbe, Nyamsuren Batsajchan, Davaa Lchagvasuren
Phylogenie, Morphologie Und Ökologie Mongolischer Langohrfledermäuse Der Gattung Plecotus (Mammalia, Chiroptera, Vespertilionidae), Dietrich Dolch, Bernd Gärtner, Klaus Thiele, Dirk Steinhauser, Ariunbold Jargalsaikhan, Annegret Stubbe, Nyamsuren Batsajchan, Davaa Lchagvasuren
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The Palaearctic is a zoogeographical region where knowledge of the distribution, taxonomy and ecology of bats (Chiroptera) is generally quite extensive. However, for many Palaearctic subregions, including Mongolia, detailed knowledge is still quite scarce. Also for some groups of species there are only few studies available to date. This holds also true for the long-eared bats of the genus Plecotus. For the long-eared bats, which live in close family groups and do not migrate over long distances, the development of different life form types can be expected. Studies tackling this are so far lacking.
The fundamental revision of the …
Blood Parasites Of Fish Of The Baikal Basin, T. R. Khamnueva, Darima R. Baldanova
Blood Parasites Of Fish Of The Baikal Basin, T. R. Khamnueva, Darima R. Baldanova
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Eight species of trypanosomes were found in nine species of fish in the Lake Baikal: Trypanosoma percae, T. amurensis, T. schulmani, T. dogieli, T. magna, T. sp.1, T. sp.2. Five species of trypanoplasms were detected in the blood of 13 species of Baikal fish: Trypanoplasma lomakini, T. littoralis, T. cotti, T. zaikai, T. sp. In the erythrocytes of the sand sculpin, Leocottus kesslerii were observed haemogregarins.
Disrupted Identities And Forced Nomads: A Post-Disaster Legacy Of Neocolonialism In The Island Of Barbuda, Lesser Antilles, Sophia Perdikaris, Rebecca Boger, Edith Gonzalez, Emira Ibrahimpašić, Jennifer D. Adams
Disrupted Identities And Forced Nomads: A Post-Disaster Legacy Of Neocolonialism In The Island Of Barbuda, Lesser Antilles, Sophia Perdikaris, Rebecca Boger, Edith Gonzalez, Emira Ibrahimpašić, Jennifer D. Adams
School of Global Integrative Studies: Faculty Publications
In the aftermath of the forced evacuation of the island of Barbuda due to Hurricane Irma, the Barbudan people have experienced an exile and return to a ‘new’ geographical, political, and economic context, albeit on the same island. With the specter of climate change and the potential impacts on island communities and nations, we use Barbuda, sister island of Antigua in the Lesser Antilles, to examine the trajectory of nomadic identities as they navigate changes that threaten contemporary land relationships and culture. Since its first permanent settlement in the 17th Century, the island geography of Barbuda has been fundamental to …
Records Of Hippoboscidae From Mongolian Birds Of Prey With Checklist, Update, Matthias Jentzsch, Benjamin Meissner, Nayamsuren Batsaikhan, Annegret Stubbe, Michael Stubbe
Records Of Hippoboscidae From Mongolian Birds Of Prey With Checklist, Update, Matthias Jentzsch, Benjamin Meissner, Nayamsuren Batsaikhan, Annegret Stubbe, Michael Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The hippoboscid species Ornithophila gestroi has been rediscovered from Mongolia. It is the easternmost of all the known occurrences. Specimens were collected from Amur Falcon Falco amurensis, Saker Falcon Falco cherrug, Lesser Kestrel Falco naumanni, Eurasian Hobby, Falco subbuteo, Common Kestrel Falco tinnunculus Linnaeus, 1758 and Black Kite Milvus migrans in a breeding area located in southern Mongolia. Amur Falcon, Eurasian Hobby and Black Kite were identified as hosts of O. gestroi for the first time.
The First Detection Of Ceratophyllus Fleas And An Ischnocera Louse On The Great Cormorant Phalacrocorax Carbo In Mongolia, Daniel Kiefer, Michael Stubbe, Annegret Stubbe, Volker Neumann, Sundev Gombobaatar, Davaa Lchagvasuren, Mathias Kiefer
The First Detection Of Ceratophyllus Fleas And An Ischnocera Louse On The Great Cormorant Phalacrocorax Carbo In Mongolia, Daniel Kiefer, Michael Stubbe, Annegret Stubbe, Volker Neumann, Sundev Gombobaatar, Davaa Lchagvasuren, Mathias Kiefer
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
There are summarized data on ectoparasites of Mongolian birds. The Mongolian-German Biological Expeditions found first records for the flea Ceratophyllus vagabundus and the Ischnocera louse Pectinopygus gyricornis at the host Phalacrocorax carbo.
Agate Fossil Beds National Monument, Paleontological Resources Management Plan (Public Version), Scott Kottkamp, Vincent L. Santucci, Justin S. Tweet, Jessica De Smet, Ellen Stark
Agate Fossil Beds National Monument, Paleontological Resources Management Plan (Public Version), Scott Kottkamp, Vincent L. Santucci, Justin S. Tweet, Jessica De Smet, Ellen Stark
United States National Park Service: Publications
Executive Summary
Since Agate Springs Ranch was founded by James H. Cook in 1887, exquisite examples of transitional Miocene mammalian fauna have been found along this stretch of the Niobrara River valley. Collectively these paleontological discoveries, along with the existing archeological and historical Native American collection, were the basis for establishing Agate Fossil Beds National Monument (AGFO) as a unit of the National Park System (NPS). The fossil remains from the Harrison and Anderson Ranch formations span a short, but important, time period within the Miocene Epoch. AGFO has provided science with an intimate look into North American mammalian evolution …
Rfia: An R Package For Estimation Of Forest Attributes With The Us Forest Inventory And Analysis Database, Hunter Stanke, Andrew O. Finley, Aaron S. Weed, Brian F. Walters, Grant M. Domke
Rfia: An R Package For Estimation Of Forest Attributes With The Us Forest Inventory And Analysis Database, Hunter Stanke, Andrew O. Finley, Aaron S. Weed, Brian F. Walters, Grant M. Domke
United States National Park Service: Publications
Forest Inventory and Analysis (FIA) is a US Department of Agriculture Forest Service program that aims to monitor changes in forests across the US. FIA hosts one of the largest ecological datasets in the world, though its complexity limits access for many potential users. rFIA is an R package designed to simplify the estimation of forest attributes using data collected by the FIA Program. Specifically, rFIA improves access to the spatiotemporal estimation capacity of the FIA Database via space–time indexed summaries of forest variables within user-defined population boundaries (e.g., geographic, temporal, biophysical). The package implements multiple design-based estimators, and has …
Development Of A Modified Floristic Quality Index As A Rapid Habitat Assessment Method In The Northern Everglades, Rebakah E. Gibble, Donatto D. Surratt
Development Of A Modified Floristic Quality Index As A Rapid Habitat Assessment Method In The Northern Everglades, Rebakah E. Gibble, Donatto D. Surratt
United States National Park Service: Publications
Floristic quality assessments (FQA) using floristic quality indices (FQIs) are useful tools for assessing and comparing vegetation communities and related habitat condition. However, intensive vegetation surveys requiring significant time and technical expertise are necessary, which limits the use of FQIs in environmental monitoring programs. This study modified standard FQI methods to develop a rapid assessment method for characterizing and modeling change in wetland habitat condition in the northern Everglades. Method modifications include limiting vegetation surveys to a subset of taxa selected as indicators of impact and eliminating richness and/or abundance factors from the equation. These modifications reduce the amount of …
Fire Monitoring Handbook
United States National Park Service: Publications
Fire is a powerful and enduring force that has had, and will continue to have, a profound influence on National Park Service (NPS) lands. Fire management decisions within the National Park Service require information on fire behavior and on the effects of fire on park resources. With good reason, the public is holding park management increasingly accountable, especially in the area of fire management. Federal and state agencies are instituting progressively more stringent guidelines for burning, monitoring, and evaluation. The impetus behind these guidelines and the purpose of this handbook are to ensure that management objectives are being met, to …
Acoustically Advertising Male Harbour Seals In Southeast Alaska Do Not Make Biologically Relevant Acoustic Adjustments In The Presence Of Vessel Noise, Leanna P. Matthews, Michelle E.H. Fournet, Christine Gabriele, Holger Klinck, Susan E. Parks
Acoustically Advertising Male Harbour Seals In Southeast Alaska Do Not Make Biologically Relevant Acoustic Adjustments In The Presence Of Vessel Noise, Leanna P. Matthews, Michelle E.H. Fournet, Christine Gabriele, Holger Klinck, Susan E. Parks
United States National Park Service: Publications
Aquatically breeding harbour seal (Phoca vitulina) males use underwater vocalizations during the breeding season to establish underwater territories, defend territories against intruder males, and possibly to attract females. Vessel noise overlaps in frequency with these vocalizations and could negatively impact breeding success by limiting communication space. In this study, we investigated whether harbour seals employed anti-masking strategies to maintain communication in the presence of vessel noise in Glacier Bay National Park and Preserve, Alaska. Harbour seals in this location did not sufficiently adjust source levels or acoustic parameters of vocalizations to compensate for acoustic masking. Instead, for every 1 dB …
Carnivore Population Structure Across An Urbanization Gradient: A Regional Genetic Analysis Of Bobcats In Southern California, Julia G. Smith, Megan K. Jennings, Erin E. Boydston, Kevin R. Crooks, Holly B. Ernest, Seth Riley, Laurel E. K. Serleys, Shaelynn Sleater-Squires, Rebecca L. Lewison
Carnivore Population Structure Across An Urbanization Gradient: A Regional Genetic Analysis Of Bobcats In Southern California, Julia G. Smith, Megan K. Jennings, Erin E. Boydston, Kevin R. Crooks, Holly B. Ernest, Seth Riley, Laurel E. K. Serleys, Shaelynn Sleater-Squires, Rebecca L. Lewison
United States National Park Service: Publications
Context In human-dominated landscapes, habitat fragmentation and barriers to movement can interrupt gene flow. While often considered at a local extent, regional analyses are also needed to reveal broader landscape-mediated population processes.
Objectives To explore the relationship between patterns of gene flow and fragmentation resulting from urbanization across southern California, we used the bobcat as an indicator species. We assembled data for a landscape level genetic analysis across southern California from both archived and new samples, including two northern Californian populations for comparison, to identify local and regional areas affected by isolation.
Methods Our regional analyses focused on a dataset …
Asynchronous Carbon Sink Saturation In African And Amazonian Tropical Forests, Wannes Hubau, Simon L. Lewis, Et. Al. Authors
Asynchronous Carbon Sink Saturation In African And Amazonian Tropical Forests, Wannes Hubau, Simon L. Lewis, Et. Al. Authors
United States National Park Service: Publications
Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 percent of 1–3 anthropogenic carbon dioxide emissions. Climate-driven vegetation models 4,5 typically predict that this tropical forest ‘carbon sink’ will continue for decades . Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to …
Problematic Plant Monitoring In Homestead National Monument Of America, 2006–2017, Craig C. Young
Problematic Plant Monitoring In Homestead National Monument Of America, 2006–2017, Craig C. Young
United States National Park Service: Publications
Abstract
Managers are challenged with the impact of problematic plants, including exotic, invasive, and pest plant species. Information on the abundance, distribution, and location of these plants is essential for developing risk-based approaches to managing these species. Based on surveys conducted in 2006, 2009, 2013, and 2017, Heartland Inventory and Monitoring Network staff and contractors identified a cumulative total of 20 potentially problematic plant species in Homestead National Monument of America (NMA). Of the 13 species found in 2017, we characterized 4 as very low frequency, 4 as low frequency, 2 as medium frequency, and 3 as high frequency. Only …
Problematic Plant Monitoring In Tallgrass Prairie National Preserve, 2006–2018, Craig C. Young
Problematic Plant Monitoring In Tallgrass Prairie National Preserve, 2006–2018, Craig C. Young
United States National Park Service: Publications
Abstract
Managers are challenged with the impact of problematic plants, including exotic, invasive, and pest plant species. Information on the abundance, distribution, and location of these plants is essential for developing risk-based approaches to managing these species. Based on surveys conducted in 2006, 2010, 2014, and 2018, Heartland Inventory and Monitoring Network staff and contractors identified a cumulative total of 33 problematic plant species in Tallgrass Prairie National Preserve. Of the 27 species found in 2018, we characterized 14 as very low frequency, 9 as low frequency, 4 as medium frequency, and 0 as high frequency. Only 4 (14.8%) of …
Estimation Of Available Epinephrine Dose In Expired And Discolored Autoinjectors Via Quantitative Smartphone Imaging, Amirus Saleheen, Bill M. Campbell, Rebecca A. Prosser, Christopher A. Baker
Estimation Of Available Epinephrine Dose In Expired And Discolored Autoinjectors Via Quantitative Smartphone Imaging, Amirus Saleheen, Bill M. Campbell, Rebecca A. Prosser, Christopher A. Baker
United States National Park Service: Publications
Epinephrine autoinjectors (EAIs) are important first aid medications for treating anaphylaxis. A 10-fold price increase over the past 12 years and evidence that expired EAIs may still contain significant doses of available epinephrine have motivated interest in the efficacy of expired EAIs as treatments of last resort. Degradation of expired EAIs, which can be caused by improper storage conditions, results in various degrees of discoloration of the epinephrine solution. Previous studies have determined that significant epinephrine remains available in expired EAIs, but these have only considered EAIs that show no discoloration. Here, we investigate the potential for colorimetric estimation of …
Effects Of Culling White-Tailed Deer On Tree Regeneration And Microstegium Vimineum, An Invasive Grass, John Paul Schmit, Elizabeth R. Matthews, Andrejs Brolis
Effects Of Culling White-Tailed Deer On Tree Regeneration And Microstegium Vimineum, An Invasive Grass, John Paul Schmit, Elizabeth R. Matthews, Andrejs Brolis
United States National Park Service: Publications
Reduction of forest regeneration due to overbrowsing by white-tailed deer is a growing concern for land managers. Abundant deer can impede forest regeneration through direct predation on tree seedlings. Additionally high deer density can facilitate the establishment of a dense understory of browse tolerant plant species that shades seedlings and persists even in the absence of deer. In response to these challenges, land managers have sought to reduce deer herds to restore tree regeneration, but few studies have evaluated the effectiveness of this management. Our study took place in Catoctin Mountain Park, a US National Park Service unit with a …
Nurse Rock Microclimates Significantly Buffer Exposure To Freezing T Temperature And Moderate Summer Temperature, Joshua L. Conver, Elliott Yarwood, Lucas D. Hetherington, Don E. Swann
Nurse Rock Microclimates Significantly Buffer Exposure To Freezing T Temperature And Moderate Summer Temperature, Joshua L. Conver, Elliott Yarwood, Lucas D. Hetherington, Don E. Swann
United States National Park Service: Publications
Nurse tree canopies mitigate exposure to freezing temperatures that could result in injury or mortality to the saguaro cactus (Carnegiea gigantea). Abiotic objects have been hypothesized to provide similar beneficial microclimates. We used data loggers at 11 nurse rock sites to record daily daytime summer maximum and winter nighttime minimum temperatures at Saguaro National Park, Arizona, to examine the effectiveness of rocks to moderate seasonal temperature extremes in the microclimate. Temperatures at rock sites averaged 2 °C warmer than exposed open control sites in winter. We found that the efficiency of rocks to act as insulators significantly increased as temperature …
Beryllium-7 Elucidate Sediment Dynamics Of The Branford River Estuary, Connecticut, Usa, Gaboury Benoit, Matthew Hirschbeck, Beth Bisson
Beryllium-7 Elucidate Sediment Dynamics Of The Branford River Estuary, Connecticut, Usa, Gaboury Benoit, Matthew Hirschbeck, Beth Bisson
United States National Park Service: Publications
Berrylium-7 elucidates sediment dynamics (i.e., sources, sinks, deposition, and resuspension) in a Connecticut estuary. Average 7 −2−1 annual atmospheric deposition of Be is 290 mBq cm year. Sediment samples from 43 locations within the estuary show that 7Be deposition is spatially complex, but were statistically indistinguishable a year apart. Weekly time series of sediments indicate 7 that levels are nearly constant on this shorter time scale on ceradio active decay is taken into account. Be levels in sediments area balance between steady losses through radioactive decay and periodic pulse inputs following rainstorms. The water column was measured intensively during three …
Implications Of Organic Mass To Carbon Ratios Increasing Over Time In The Rural United States, W.C. Malm, B.A. Schichtel, J.L. Hand, A.J. Prenni
Implications Of Organic Mass To Carbon Ratios Increasing Over Time In The Rural United States, W.C. Malm, B.A. Schichtel, J.L. Hand, A.J. Prenni
United States National Park Service: Publications
The thermal evolution procedure used by most monitoring programs in the United States to determine carbonaceous aerosol concentrations is referred to as the thermal‐optical reflectance method, where an aerosol sample that has been collected on a quartz filter is heated and evolved carbon is characterized as either organic (OC) or light absorbing carbon (LAC). Evolved carbon assigned to OC is multiplied by a factor, Roc, to achieve an estimate of organic mass. Over the last 10–15 years, Roc, estimated through multiple linear regression analysis of data collected in the Interagency Monitoring of Protected Visual Environments (IMPROVE) program, has increased at …
Berry Important? Wolf Provisions Pups With Berries In Northern Minnesota, Austin T. Homkes, Thomas D. Gable, Steve K. Windles, Joseph K. Bump
Berry Important? Wolf Provisions Pups With Berries In Northern Minnesota, Austin T. Homkes, Thomas D. Gable, Steve K. Windles, Joseph K. Bump
United States National Park Service: Publications
Wolves (Canis lupus) primarily provision pups by catching mammalian prey and bringing remains of the carcass to the pups at a den or rendezvous site via their mouths or stomach. In August 2017, we observed an adult wolf regurgitating wild blueberries (Vaccinium spp.) to pups at a rendezvous site in the Greater Voyageurs Ecosystem, Minnesota, USA, which is the only known observation of wolves provisioning pups with wild berries. This observation, in combination with other evidence from the Greater Voyageurs Ecosystem, suggests wild berries might be a more valuable food source for wolves in southern boreal ecosystems than previously appreciated.
Modelling Pinniped Abundance And Distribution By Combining Counts At T Terrestrial Sites And In-Water Sightings, Steven L. Whitlock, Jamie N. Womble, James T. Peterson
Modelling Pinniped Abundance And Distribution By Combining Counts At T Terrestrial Sites And In-Water Sightings, Steven L. Whitlock, Jamie N. Womble, James T. Peterson
United States National Park Service: Publications
Pinnipeds are commonly monitored using aerial photographic surveys at land- or ice-based sites, where animals come ashore for resting, pupping, molting, and to avoid predators. Although these counts form the basis for monitoring population change over time, they do not provide information regarding where animals occur in the water, which is often of management and conservation interest. In this study, we developed a hierarchical model that links counts of pinnipeds at terrestrial sites to sightings-at-sea and estimates abundance, spatial distribution, and the proportion of time spent on land (attendance probability). The structure of the model also allows for the inclusion …
Dental Microwear As A Behavioral Proxy For Distinguishing Between Canids At The Upper Paleolithic (Gravettian) Site Of Predmostí, Czech Republic, Kari A. Prassack, Josephine Dubois, Martina Laznickova-Galetova, Mietje Germonpre, Peter S. Ungar
Dental Microwear As A Behavioral Proxy For Distinguishing Between Canids At The Upper Paleolithic (Gravettian) Site Of Predmostí, Czech Republic, Kari A. Prassack, Josephine Dubois, Martina Laznickova-Galetova, Mietje Germonpre, Peter S. Ungar
United States National Park Service: Publications
Morphological and genetic evidence put dog domestication during the Paleolithic, sometime between 40,000 and 15,000 years ago, with identification of the earliest dogs debated. We predict that these earliest dogs (referred to herein as protodogs), while potentially difficult to distinguish morphologically from wolves, experienced behavioral shifts, including changes in diet. Specifically, protodogs may have consumed more bone and other less desirable scraps within human settlement areas. Here we apply Dental Microwear Texture Analysis (DMTA) to canids from the Gravettian site of P�redmostí (approx. 28,500 BP), which were previously assigned to the Paleolithic dog or Pleistocene wolf morphotypes. We test whether …
Bird Community Monitoring At Tallgrass Prairie National Preserve, Kansas, Status Report 2001–2018, David G. Peitz, Kathleen A. Kull
Bird Community Monitoring At Tallgrass Prairie National Preserve, Kansas, Status Report 2001–2018, David G. Peitz, Kathleen A. Kull
United States National Park Service: Publications
Executive Summary
In 2001, the Heartland I&M Network initiated breeding bird surveys on Tallgrass Prairie National Preserve, Kansas, to assess the ecological integrity of the preserve’s habitat. Birds are an important component of ecosystems and can serve as good indicators of habitat change in an ecosystem. In the 17 years of bird surveys at the preserve (2001 to 2018, excluding 2003), there were 2,089 plot visits and 119 different bird species recorded, 96 of which have the potential to breed within the preserve. These 96 species represent approximately 81% of the total species one would reasonably expect to have breeding …