scholarly journals Jamesiella scotica new to North America from USA, Alaska

2016 ◽  
Vol 53 ◽  
pp. 23 ◽  
Author(s):  
Tor Tønsberg
Keyword(s):  
North America ◽  
National Park ◽  
High Tide ◽  
High Tide Line

Jamesiella scotica is reported new to North America from Kenai Fjords National Park in Alaska. It was found on live and moribund leaves of the bryophyte Paraleucobryum longifolium on sea-shore rocks just above high tide line. 

Stranded in the high tide line: Spatial and temporal variability of beached microplastics in a semi-enclosed embayment (Arcachon, France)

2021 ◽  
pp. 149144
Author(s):  
Charlotte Lefebvre ◽  
Isabel Jalón Rojas ◽  
Juliette Lasserre ◽  
Sandrine Villette ◽  
Sophie Lecomte ◽  
...  
Keyword(s):  
Temporal Variability ◽  
High Tide ◽  
Spatial And Temporal Variability ◽  
High Tide Line

scholarly journals Sea Oats, Uniola paniculata

EDIS ◽  
2018 ◽  
Vol 2018 (5) ◽  
Author(s):  
Debbie Miller ◽  
Mack Thetford ◽  
Chris Verlinde ◽  
Gabriel Campbell ◽  
Ashlynn Smith
Keyword(s):  
Wind Waves ◽  
High Tide ◽  
Coastal Areas ◽  
Salt Tolerant ◽  
Uniola Paniculata ◽  
Vertical Growth ◽  
Sea Oats ◽  
In The Wild ◽  
Florida Panhandle ◽  
High Tide Line

Sea oats occur throughout Florida on beach dunes and beaches and on coastal areas west to Texas and north to Maryland. Sea oats are vital dune builders that accumulate sand and prevent erosion due to wind, waves, and large storms. As sand is trapped by the long leaves of sea oats, vertical growth is stimulated, and rooting occurs at the buried nodes. This plant is extremely drought- and salt-tolerant, grows up to the high tide line of beaches, and propagates both vegetatively and by seed in the wild (Shadow 2007).https://edis.ifas.ufl.edu/sg186 This publication is derived from information in SGEB-75/SG156, Dune Restoration and Enhancement for the Florida Panhandle, by Debbie Miller, Mack Thetford, Christina Verlinde, Gabriel Campbell, and Ashlynn Smith. https://edis.ifas.ufl.edu/sg156.

Age of the Rockland tephra, western USA

2004 ◽  
Vol 62 (1) ◽  
pp. 94-104 ◽  
Author(s):  
M.A. Lanphere ◽  
D.E. Champion ◽  
M.A. Clynne ◽  
J.B. Lowenstern ◽  
A.M Sarna-Wojcicki ◽  
...  
Keyword(s):  
North America ◽  
National Park ◽  
Fall Deposit ◽  
Ion Microprobe ◽  
Western North America ◽  
Weighted Mean ◽  
Central California ◽  
Ash Fall ◽  
Lassen Peak ◽  
Eruption Age

The age of the Rockland tephra, which includes an ash-flow tuff south and west of Lassen Peak in northern California and a widespread ash-fall deposit that produced a distinct stratigraphic marker in western North America, is constrained to 565,000 to 610,000 yr by 40Ar/39Ar and U–Pb dating. 40Ar/39Ar ages on plagioclase from pumice in the Rockland have a weighted mean age of 609,000 ± 7000 yr. Isotopic ages of spots on individual zircon crystals, analyzed by the SHRIMP-RG ion microprobe, range from ∼500,000 to ∼800,000 yr; a subpopulation representing crystal rims yielded a weighted-mean age of 573,000 ± 19,000 yr. Overall stratigraphic constraints on the age are provided by two volcanic units, including the underlying tephra of the Lava Creek Tuff erupted within Yellowstone National Park that has an age of 639,000 ± 2000 yr. The basaltic andesite of Hootman Ranch stratigraphically overlies the Rockland in the Lassen Peak area and has 40Ar/39Ar ages of 565,000 ± 29,000 and 565,000 ± 12,000 yr for plagioclase and groundmass, respectively. Identification of Rockland tephra in ODP core 1018 offshore of central California is an important stratigraphic age that also constrains the eruption age to between 580,000 and 600,000 yr.

Hexactinellid and associated sponges from the upper Reef Trail Member of the Bell Canyon Formation, southern Guadalupe Mountains National Park, Texas

2007 ◽  
Vol 81 (6) ◽  
pp. 1241-1256 ◽  
Author(s):  
J. Keith Rigby ◽  
Gorden L. Bell ◽  
Kirsten Thompson
Keyword(s):  
North America ◽  
National Park ◽  
Southwestern Part ◽  
Type Section ◽  
Different Types ◽  
Guadalupe Mountains National Park ◽  
Hexactinellid Sponges

A small faunule of silicified hexactinellid sponges and root tufts has been recovered from the upper Guadalupian Reef Trail Member of the Bell Canyon Formation, from the Patterson Hills, in the southwestern part of the Guadalupe Mountains National Park in western Texas. Some demosponges from the type section of the Reef Trail Member, near the mouth of McKittrick Canyon on the front of the Guadalupe Mountains in the park, have also been documented. Included in the faunule from the Patterson Hills localities are the new amphidiscosid hexactinellid pelicasponge Trailospongia reischi n. gen. and sp., the questionable pelicaspongiid Hexirregularia nana n. gen. and sp., and the dictyospongiid hexactinellids Microstaura doliolum Finks, 1960, and Microstaurella minima n. gen. and sp., and Microstaurella parva n. gen. and sp. They are associated with specimens of the lyssacinosid brachiosponges Toomeyospongiella gigantia Rigby and Bell, 2005, Toomeyospongia modica n. sp., and Toomeyospongia minuta n. gen. and sp., and fragments of three different types of root tufts, termed Tufts 1, 3, and 4. Two specimens of the new cylindrical demosponge Mckittrickella pratti n. gen. and sp. are associated with Tuft 2 in the collection from the type section of the Reef Trail Member, and a third specimen was collected from the member in the Patterson Hills. These sponges from Localities 1-7 are the youngest Permian sponges known from the region, and possibly from North America.

Relocation of Alona manueli Sinev & Zawisza 2013 and a new closely related species from the Ecuadorian Andes to the new genus Alpinalona (Cladocera, Chydoridae, Aloninae)

Zootaxa ◽  
2017 ◽  
Vol 4350 (3) ◽  
pp. 563 ◽  
Author(s):  
MIGUEL ALONSO ◽  
ARTEM Y. SINEV
Keyword(s):  
North America ◽  
South America ◽  
High Altitude ◽  
Related Species ◽  
National Park ◽  
New Genus ◽  
Ventral Surface ◽  
Closely Related Species ◽  
Head Pores ◽  
Lateral Head

Alpinalona gen. nov. is described for two species found in high altitude localities of continental North America and South America: Alona manueli (Sinev & Zawisza, 2013) from the Neovolcanic Mexican Axis and Alpinalona cajasi gen. et sp. nov from El Cajas National Park (Ecuador). The new genus is separated from Hexalona and allies by the absence of limb VI and filter plate V;  from Anthalona, Coronatella and the elegans-group by having seven setae on exopodite III, and by the presence of a well-developed seta 1 on the IDL of limb III; from Alona s. str. (quadrangularis-group) and Ovalona, by two main head pores, lateral head pores located close to main pores, and by a bilobed exopodite V; from Ovalona by the presence of seta (i) and inner setae 2–3 on limb I, and setae 4–5 of exopodite III being of same size; and from Alona s. lato by weakly developed marginal denticles of postabdomen, clusters of thin setulae on ventral surface of limb I, and by plumose setae 5–6 of exopodite IV. Alpinalona cajasi sp. nov. can be easily distinguished from A. manueli by the following characteristics: prominent posterodorsal angle of carapace; broader headshield; longer PP distance; and postanal marginal denticles organized into groups.  

Changing Information Extraction of Coastal Accretion-Erosion from High Resolution Satellite Images

2012 ◽  
Vol 610-613 ◽  
pp. 3685-3688 ◽  
Author(s):  
Yan Gu ◽  
Ying Zhang ◽  
Zheng Jun Wang
Keyword(s):  
High Resolution ◽  
Satellite Images ◽  
Dynamic Balance ◽  
High Tide ◽  
Tidal Level ◽  
High Resolution Satellite Images ◽  
High Resolution Images ◽  
The Mean ◽  
Sea Reclamation ◽  
High Tide Line

Methods for extracting information about coastline, mean high tide line and mean low tide line from satellite images are investigated based on the satellite images which have a spatial resolution of 10m and were obtained in the coastal area of Yancheng of Jiangsu province in 2006, 2008 and 2009, respectively. The evolution of the coastal zone influenced by human activities such as harbor construction and sea reclamation for farming is analyzed. The results show that (1) comparing with low resolution RS images, the high resolution images can be used to extract more subtle culture features, from which the mean high tidal line can be extracted; (2) by combing with the tidal level of the day and based on the high tidal line extracted already, the instantaneous water line on the images and leaner relationship among them, the mean low tidal line may possibly be worked out; (3) it has been being in an accretion status since 2006, with an increasing magnitude every year, while the mean low tide line was in a dynamic balance status from 2006 to 2008, but was eroded by 840m from 2008 to 2009, being very distinct in its change.

scholarly journals Predation in multi-prey multi-predator communities: Seeking common patterns between North America and Africa

2016 ◽  
Author(s):  
Norman Owen-Smith
Keyword(s):  
North America ◽  
National Park ◽  
Eastern Africa ◽  
Case Histories ◽  
African Savanna ◽  
Vegetation Growth ◽  
Comprehensive Information ◽  
Prey Remains ◽  
Functional Mechanisms ◽  
The Impact

The impact that large mammalian carnivores can have on the abundance of their ungulate prey remains contentious and achieving scientific consensus has proved elusive. Several studies in temperate latitudes in North America have documented how increases in the abundance of wolves have been associated with declines in the abundance of certain large ungulate species, and vice versa. In contrast, in African savanna ecosystems in both southern and eastern Africa, variations in the abundance of ungulate populations seem to be primarily associated with fluctuations in rainfall affecting vegetation growth and consequent food availability for herbivores. In this review, I will explain how the functional mechanisms operating in these distinct ecosystems are basically similar, despite contrasts in their diversity of predators and prey. I will describe how predation constrains the abundance of African savanna herbivores, despite resource controls over their population dynamics. For case histories I will draw particularly on findings from South Africa’s Kruger National Park, where the most comprehensive information is available.

The Influence of the University of Heidelberg on the Development of Geology in North America Between 1860 and 1913

1988 ◽  
Vol 7 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Julianne Mahler ◽  
Hermann Pfefferkorn
Keyword(s):  
North America ◽  
National Park ◽  
Laboratory Experiments ◽  
The United States ◽  
West Germany ◽  
United States Geological Survey ◽  
Graduate Studies ◽  
The World ◽  
Geological Sciences ◽  
The University

The University of Heidelberg, in Heidelberg, West Germany, had a significant influence on the development of the geological sciences in North America between 1860 and 1913. During these years, in a reversal of the current scene, the brightest young scientists of North America came to Europe to pursue graduate studies. Of these scientists, twelve came to Heidelberg to study the geological sciences and then returned to North America to make significant contributions in their field. For example, two students developed the CIPW normative calculations; one performed the first quantitative laboratory experiments, duplicating rock deformation in the earth's crust; another student became the first "geologist-in-charge" of the United States Geological Survey (USGS); and a fifth mapped Yellowstone before it was a national park. The students came to Heidelberg to learn the newest techniques from professors such as Rosenbusch, Bunsen, and Salomon-Calvi. They also learned to develop theories based on the technique of detailed and careful observation that these men used. They caught the excitement about the world around them exuded by these same men, and they, in turn, spread what they had learned in Heidelberg when they returned to North America as professors and members of the USGS.

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