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Articles 91 - 120 of 571
Full-Text Articles in Nature and Society Relations
Soricidenfunde (Mammalia: Insectivora) In Der Mongolei, Michael Stubbe, Davaa Lchagvasuren, Hermann Ansorge, Ravčigijn Samjaa, Dietrich Dolch, Nayamsuren Batsajchan, Margit Hanelt, Annegret Stubbe
Soricidenfunde (Mammalia: Insectivora) In Der Mongolei, Michael Stubbe, Davaa Lchagvasuren, Hermann Ansorge, Ravčigijn Samjaa, Dietrich Dolch, Nayamsuren Batsajchan, Margit Hanelt, Annegret Stubbe
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
New data on the Mongolian fauna of Soricidae came in the last decades from Russian scientists, such as Ju. G. Švecov, N. I. Litvinov, and B. I. Sheftel, last not least, in cooperation with Mongolian mammalogists. We remind the reader about the publications of N. Chotochu, D. Bazardorž, and R. Samjaa with his team. Also in future, there is a lot to do for understanding the biology, ecology, and distribution of the Mongolian shrews. We have summarized the most important publications on shrews and made a grid mapping together with the results of the Mongolian-German Biological Expeditions. Up to now, …
Centipedes And Millipedes (Chilopoda, Diplopoda) Of The Khentey Mountain Range, Northern Mongolia, Ansgar Poloczek, Martin Pfeiffer, Pavel S. Nefediev
Centipedes And Millipedes (Chilopoda, Diplopoda) Of The Khentey Mountain Range, Northern Mongolia, Ansgar Poloczek, Martin Pfeiffer, Pavel S. Nefediev
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
We sampled 99 plots in three locations in the West, South and East Khentey, each consisted of both pitfall traps and soil and litter sampling. We were able to establish the occurrence of ten species of Chilopoda from three genera, three families and three orders and three species of Diplopoda also from three genera, three families and three orders in the Khentey Mountain region. Among the Chilopoda were found eight Lithobiomorpha: Lithobius (Ezembius) giganteus, L. (E.) sibiricus, L. (E.) ostiacorum, L. (E.) rapax, L. …
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.
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 …
Die Türkentaube Streptopelia Decaocto In Der Mongolei, Michael Stubbe, Annegret Stubbe, Davaa Lchagvasuren, Nayamsuren Batsaikhan, Sundev Gombobaatar
Die Türkentaube Streptopelia Decaocto In Der Mongolei, Michael Stubbe, Annegret Stubbe, Davaa Lchagvasuren, Nayamsuren Batsaikhan, Sundev Gombobaatar
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The first record of Streptopelia decaocto in Mongolia was noticed 1988 in the Dzungarian Gobi, Somon Bulgan, by the Mongolian-German Biological Expedition. In the last 30 years, this bird species has settled nearly all suitable habitats, so parks in the cities and Somon centres, river valleys and in the arid zone, the sajrs with elm trees or poplars as well as in some oases.
Dem Ornithologen und Schüler von Erwin Stresemann Eugeniusz Nowak in Würdigung seiner großen Verdienste in der Erforschung der Migration der Türkentaube mit herzlichen Glückwünschen zum 88. Geburtstag am 08. Juni 2021 gewidmet.
Diversity Of Moths (Lepidoptera: Heterocera) In North-Central Mongolia, Khishigdelger Enkhtur, Martin Pfeiffer, Uuganbayar Munkhbat, Bazartseren Boldgiv
Diversity Of Moths (Lepidoptera: Heterocera) In North-Central Mongolia, Khishigdelger Enkhtur, Martin Pfeiffer, Uuganbayar Munkhbat, Bazartseren Boldgiv
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
In this study, was aimed at 1) collecting baseline data in order to study distribution of moths in the future, and 2) estimating diversity of moths distributed in central and northern Mongolia. For this study were collected specimens from 266 species, representing 15 families from 7 study sites during 92 nights spanning over two years. Samples were collected around the research stations Tunkhel and Khonin Nuga in Selenge Aimag, Ikhtamir in Arkhangai Aimag, Mungunmorit and Undurshireet Soums in Tuv Aimag, as well from Shargamorit near Ulaanbaatar, the capital of Mongolia, and from Tsenkhermandal Soum in Khentii Aimag. So were found …
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 …
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.
Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett
Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett
Graduate Student Theses, Dissertations, & Professional Papers
Transboundary conservation aims to facilitate environmental conservation and management at the ecosystem level by operating across political boundaries, through the cooperation of two or more countries. Though there is increased interest and advocation for transboundary conservation initiatives around the world, there remains a limited understanding of how they function on-the-ground. Within this study, I address these gaps in knowledge through two phases of research, both focusing on the Sulu-Sulawesi Seascape as a case study site. Phase I involved a policy analysis of Indonesian, Malaysia, and Philippine policies related to fisheries, coastal zones and protected areas, and environmental quality. Through this …
On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy
On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy
Cal Poly Humboldt theses and projects
As ecosystem engineers, beavers construct complex riparian and wetland habitats that benefit many other species, including endangered salmonids. Through their landscape alterations, beavers also promote increased groundwater recharge and provide refugia during wildfires and high flow events by impounding water and allowing it to spread across the landscape. Prior to the North American colonial fur trapping campaigns, there were between 60 and 400 million beavers in North America. By the beginning of the 20th century, beavers were extirpated from many parts of the continent, however through human efforts, their population has since rebounded to between 10 and 15 million. The …
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.
Assessing California Commercial Fishing Community Well-Being In The Context Of Marine Protected Area (Mpa) Formation, Samantha Cook
Assessing California Commercial Fishing Community Well-Being In The Context Of Marine Protected Area (Mpa) Formation, Samantha Cook
Cal Poly Humboldt theses and projects
Marine protected areas (MPAs)—defined geographic areas where fishing and harvesting activity is limited or restricted—have emerged as a popular marine biodiversity and climate resilience strategy worldwide. MPA monitoring efforts often follow MPA designation to help inform the adaptive management of MPAs and MPA networks. In 2012, California completed the largest statewide system of MPAs to date, consisting of 124 MPAs covering 16% of state waters. Following MPA implementation, the state initiated a long-term monitoring program (2019-2022) to help inform the 10-year MPA management review. This two-chapter thesis presents findings from a state-funded project to conduct long-term socioeconomic monitoring for human …
Advancing Best Practices For Aversion Conditioning (Humane Hazing) To Mitigate Human–Coyote Conflicts In Urban Areas, Lesley Sampson, Lauren Van Patter
Advancing Best Practices For Aversion Conditioning (Humane Hazing) To Mitigate Human–Coyote Conflicts In Urban Areas, Lesley Sampson, Lauren Van Patter
Human–Wildlife Interactions
Coyotes (Canis latrans) are now recognized as a permanent feature in urban environments across much of North America. Behavioral aversion conditioning, or humane hazing, is increasingly advocated as an effective and compassionate alternative to wildlife management strategies, such as trap and removal. Given a growing public interest in humane hazing, there is a need to synthesize the science regarding methods, outcomes, efficacy, and other relevant considerations to better manage human–coyote conflicts in urban areas. This paper was prepared as an outcome of a workshop held in July 2019 by Coyote Watch Canada (CWC) to synthesize the literature on …
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 …
When Doing More Requires Knowing More: Explaining The Intention To Seek Procedural Information About Recycling, Sonny Rosenthal, Yan Wah Leung
When Doing More Requires Knowing More: Explaining The Intention To Seek Procedural Information About Recycling, Sonny Rosenthal, Yan Wah Leung
Research Collection College of Integrative Studies
This study examines the relationship between the intention to recycle more and the intention to seek procedural information, in this case, information about how to recycle. In contrast to prior research that used information seeking as a predictor of behavior change, this study considers behavioral intention as a predictor of intention to seek information. Regression analysis of survey data from Singapore residents confirms that prediction, explaining 27% of the variance in intention to seek procedural information. Moderation analysis suggests the effect of intention to recycle more is stronger among individuals with low recycling self-efficacy. An alternative analysis suggests the greater …
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 …
The Belknap Campus And Metro Louisville Urban Heat Island Effect: Air And Ground Surface Temperature Analysis, Kenyetta Johnson
The Belknap Campus And Metro Louisville Urban Heat Island Effect: Air And Ground Surface Temperature Analysis, Kenyetta Johnson
Undergraduate Arts and Research Showcase
Numerous studies show that urban morphologies and land covers generate excess heat emissions and retain heat relative to surrounding rural areas, known as the Urban Heat Island (UHI) effect. Urban fabrics paved by concretes and asphalts absorbs solar radiation during solar peak then radiates heat after sundown. This study investigates temperature distribution data related to the UHI effect on the Belknap campus at the University of Louisville, which represents a small aerial sample of the Louisville metropolitan UHI effect. The objective of this study is to measure the reflectivity of ground surfaces and air temperatures on the Belknap campus during …
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.