scholarly journals ON FOUR NEW CALIFORNIAN HEPIALI

1876 ◽  
Vol 8 (9) ◽  
pp. 174-175 ◽  
Author(s):  
James Behrens
Keyword(s):  
North America ◽  
East Coast ◽  
The West

The species described in this paper are from Mendocino. The genus seems to be more numerously represented on the West than on the East Coast of North America. Some of the new forms resemble the Eutopean. To none of these species can I refer Dr. Boisduval's descriptions of hectoides or californicus.

Seasonal Occurrence and Abundance of Free-Swimming Copepod Nauplii in Narragansett Bay

1966 ◽  
Vol 23 (3) ◽  
pp. 415-422 ◽  
Author(s):  
Daniel J. Faber
Keyword(s):  
North America ◽  
Relative Abundance ◽  
East Coast ◽  
Narragansett Bay ◽  
Seasonal Abundance ◽  
Seasonal Occurrence ◽  
Individual Species ◽  
The West ◽  
Free Swimming ◽  
The Individual

Night, surface zooplankton samples at one position in the West Passage of Narragansett Bay yielded 10 calanoid, three cyclopoid, and one harpacticoid species of free-swimming copepod nauplii. The seasonal abundance of all species of nauplii combined during the 12 months of study showed significant peaks in spring and mid summer. The holoplankters were grouped into four seasonal categories: summer–fall, winter–spring, spring, and year-round; the meroplankters were put in another category. The first two groups dominated the collections. The seasonal occurrence and relative abundance of the individual species of nauplii is shown for the period of study. Included is a short synopsis of the geographical distribution of the adults along the east coast of North America as recorded in the literature.

scholarly journals Monarch butterflies cross the Appalachians from the west to recolonize the east coast of North America

2010 ◽  
Vol 7 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Nathan G. Miller ◽  
Leonard I. Wassenaar ◽  
Keith A. Hobson ◽  
D. Ryan Norris
Keyword(s):  
North America ◽  
Direct Evidence ◽  
East Coast ◽  
Gulf Coast ◽  
Danaus Plexippus ◽  
Early Spring ◽  
Eastern United States ◽  
The West ◽  
Monarch Butterflies ◽  
The Usa

Each spring, millions of monarch butterflies ( Danaus plexippus ) migrate from overwintering sites in Mexico to recolonize eastern North America. However, few monarchs are found along the east coast of the USA until mid-summer. Brower (Brower, L. P. 1996 J. Exp. Biol. 199, 93–103.) proposed that east coast recolonization is accomplished by individuals migrating from the west over the Appalachians, but to date no evidence exists to support this hypothesis. We used hydrogen ( δ D) and carbon ( δ 13 C) stable isotope measurements to estimate natal origins of 90 monarchs sampled from 17 sites along the eastern United States coast. We found the majority of monarchs (88%) originated in the mid-west and Great Lakes regions, providing, to our knowledge, the first direct evidence that second generation monarchs born in June complete a ( trans -) longitudinal migration across the Appalachian mountains. The remaining individuals (12%) originated from parents that migrated directly from the Gulf coast during early spring. Our results provide evidence of a west to east longitudinal migration and provide additional rationale for conserving east coast populations by identifying breeding sources.

scholarly journals Searching for Franklin where he was ordered to go: Captain Erasmus Ommanney's sledging campaign to Cape Walker and beyond, spring 1851

Polar Record ◽  
2016 ◽  
Vol 52 (4) ◽  
pp. 474-498
Author(s):  
W. Barr
Keyword(s):  
North America ◽  
West Coast ◽  
East Coast ◽  
The West ◽  
Northwest Passage ◽  
Ice Conditions ◽  
To Come ◽  
Detailed Search ◽  
Northeast Coast

ABSTRACTSince the Admiralty's instructions to Captain Sir John Franklin for his attempt at a transit of the northwest passage in HMS Erebus and Terror in 1845 specified that he should proceed to Cape Walker at the northeastern tip of Russell Island, and head southwest from there to the waterways already explored along the mainland coast of North America, as far as ice conditions and any intervening land permitted, it was natural that the first search expedition to come within striking distance of Cape Walker, should make this one of the starting points of its detailed search. This was the squadron of Captain Horatio Austin that wintered off the northeast coast of Griffith Island in 1850–1851. Following his orders, in the spring of 1851 Captain Erasmus Ommanney of HMS Assistance set off with an impressive cavalcade of seven man-hauled sledges, most of them support sledges. From Cape Walker Lt. William Browne searched the east coast of Prince of Wales Island, that is the western shores of Peel Sound while Ommanney himself and Lt. Sherard Osborn searched the west coast of Prince of Wales Island, that is the east shore of McClintock Channel. No traces of Franklin's expedition were found. Their conclusions were that both McClintock Channel and Peel Sound were permanently blocked with ice, and that Franklin's ships could not have travelled south by either route. While the conclusion as regards McClintock Channel was absolutely correct, that with regard to Peel Sound was incorrect. This must have been the route whereby Erebus and Terror had reached the vicinity of King William Island, and the conclusion that Peel Sound never cleared of ice was very unfortunate in that the next search expedition dispatched by the Admiralty, that of Captain Sir Edward Belcher in 1852–1854 made no attempt to penetrate south, when it is possible that Peel Sound was clear of ice.

scholarly journals Quantification of migrant hoverfly movements (Diptera: Syrphidae) on the West Coast of North America

2019 ◽  
Vol 6 (4) ◽  
pp. 190153 ◽  
Author(s):  
Myles H. M. Menz ◽  
Brian V. Brown ◽  
Karl R. Wotton
Keyword(s):  
North America ◽  
West Coast ◽  
Life Histories ◽  
East Coast ◽  
Seasonal Migration ◽  
Science Data ◽  
The West ◽  
Video Footage ◽  
San Luis ◽  
The Usa

The seasonal migration of huge numbers of hoverflies is frequently reported in Europe from mountain passes or spurs of land. The movement of such large numbers of beneficial insects is thought to provide significant ecosystem services in terms of pollination and pest control. Observations from the East Coast of the USA during the 1920s indicate the presence of migratory life histories among some hoverfly species there, but 90 years have now passed since the last reported observation of hoverfly migration in the USA. Here, we analyse video footage taken during a huge northward migration of hoverflies on 20 April 2017 on the West Coast of California. The quantification of migrant numbers from this footage allows us to estimate the passage of over 100 000 hoverflies in half an hour over a 200 m section of headland in Montaña de Oro State Park (San Luis Obispo County). Field collections and analysis of citizen science data indicate different species from the previously reported Eristalis tenax migrations on the East Coast of the USA and provide evidence for migration among North American hoverflies. We wish to raise awareness of this phenomenon and suggest approaches to advance the study of hoverfly migration in North America and elsewhere.

scholarly journals Are tidal predictions a good guide to future extremes? – a critique of the Witness King Tides Project

2020 ◽  
Author(s):  
John Hunter
Keyword(s):  
North America ◽  
West Coast ◽  
East Coast ◽  
Tide Gauge ◽  
Tide Gauge Records ◽  
The West ◽  
The World ◽  
The Usa ◽  
Good Guide ◽  
Using Data

Abstract. An analysis of the viability of the Witness King Tides Project (hereafter called WKT) using data from the GESLA-2 database of quasi-global tide-gauge records is described. The results indicate regions of the world where WKT should perform well (e.g. the west coast of the USA) and others where it would not (e.g. the east coast of North America). Recommendations are made both for assessments that should be made prior to a WKT project, and also for an alternative to WKT projects.

Ammophila Invasion Ecology and Dune Restoration on the West Coast of North America

Diversity ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 629
Author(s):  
Andrea J. Pickart
Keyword(s):  
North America ◽  
West Coast ◽  
Native Species ◽  
East Coast ◽  
Ecosystem Engineer ◽  
Native Plant ◽  
Ammophila Arenaria ◽  
The West ◽  
Native Plant Species ◽  
Heavy Equipment

The invasive ecosystem engineer Ammophila arenaria, native to Europe, was first introduced to California (USA) in 1896. More than a century later, it has come to dominate coastal foredune vegetation on the west coast of North America to the near exclusion of native species. A. arenaria builds a narrow, steep, peaked, and densely vegetated foredune, in contrast to the broad, more sparsely vegetated foredunes built by the native Elymus mollis. As such, it has modified dune processes by fixing the foredune and disrupting exchange of sediment between the beach, foredune, and dunefield. In the 1930s the congener A. breviligulata, native to the east coast and Great Lakes USA, was first introduced to Oregon, and has been displacing A. arenaria in southern Washington. Ammophila spp. have drastically reduced biodiversity, outcompeting native plant species, and displacing both invertebrate and vertebrate species. Restoration of west coast dunes through the removal of Ammophila began in the 1990s. Methods usually consist of one or a combination of manual digging, burning/herbicides, or excavation with heavy equipment. There are benefits and disadvantages to each method. Manual removal has proven most effective at restoring foredune form and process but is expensive. Excavation and herbicides may result in the loss of foredune morphology. Managers must articulate goals carefully before selecting restoration methods.

scholarly journals Are tidal predictions a good guide to future extremes? – a critique of the Witness King Tides project

Ocean Science ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 703-714
Author(s):  
John Hunter
Keyword(s):  
North America ◽  
Sea Level ◽  
East Coast ◽  
Tide Gauge ◽  
Tide Gauge Records ◽  
The West ◽  
The World ◽  
The Usa ◽  
Good Guide ◽  
Using Data

Abstract. An analysis of the viability of the Witness King Tides project (hereafter called WKT) using data from the GESLA-2 database of quasi-global tide-gauge records is described. The results indicate regions of the world where a key criterion for a WKT project (that it be executed on a day of unusually high sea level) would likely be met (e.g. the west coast of the USA) and others where it would not (e.g. the east coast of North America). Recommendations are made both for assessments that should be made prior to a WKT project and also for an alternative to WKT projects.

ON A COLLECTION OF LITTORAL POLYCHAETA FROM THE WEST COAST OF VANCOUVER ISLAND

1932 ◽  
Vol 7 (1) ◽  
pp. 309-318 ◽  
Author(s):  
E. BERKELEY ◽  
C. BERKELEY
Keyword(s):  
New Species ◽  
North America ◽  
West Coast ◽  
New Record ◽  
East Coast ◽  
Vancouver Island ◽  
The West ◽  
Barkley Sound ◽  
A New Species

No collection of littoral Polychaeta from the west coast of Vancouver island has hitherto been described. This paper records twenty-eight species collected on that coast at two bays north of Barkley sound. Of these twenty-eight species, twenty-two have already been recorded from the east coast of the island. Of the six remaining species, two have previously been known from California only, one from California and Japan and one from Alaska only; one is a new record for the west coast of North America and one is a new species.

The Identification and Study of Indian Shell Middens in Eastern North America: 1643–1861

1986 ◽  
Vol 6 (3) ◽  
pp. 227-243 ◽  
Author(s):  
Andrew L. Christenson
Keyword(s):  
Nineteenth Century ◽  
Civil War ◽  
North America ◽  
East Coast ◽  
Eastern North America ◽  
Shell Midden ◽  
Shell Middens ◽  
Work Done

Although the interest in shell middens in North America is often traced to reports of the discoveries in Danish kjoekkenmoeddings in the mid-nineteenth century, extensive shell midden studies were already occurring on the East Coast by that time. This article reviews selected examples of this early work done by geologists and naturalists, which served as a foundation for shell midden studies by archaeologists after the Civil War.

SEA LEVEL BUDGET ALONG THE EAST COAST OF NORTH AMERICA

2017 ◽  
Author(s):  
Allison Pease ◽  
◽  
James Davis
Keyword(s):  
North America ◽  
Sea Level ◽  
East Coast
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