DOCSLIB.ORG

Salinity Pulses Off the Central Oregon Coast Received: 09 March 2015 1 2 2 2 2 Accepted: 19 October 2015 Piero L

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Salinity Pulses Off the Central Oregon Coast Received: 09 March 2015 1 2 2 2 2 Accepted: 19 October 2015 Piero L www.nature.com/scientificreports OPEN Anomalous Near-Surface Low- Salinity Pulses off the Central Oregon Coast Received: 09 March 2015 1 2 2 2 2 Accepted: 19 October 2015 Piero L. F. Mazzini , Craig M. Risien , John A. Barth , Stephen D. Pierce , Anatoli Erofeev , 2 2 2 2 Published: 26 November 2015 Edward P. Dever , P. Michael Kosro , Murray D. Levine , R. Kipp Shearman & Michael F. Vardaro2 From mid-May to August 2011, extreme runoff in the Columbia River ranged from 14,000 to over 17,000 m3/s, more than two standard deviations above the mean for this period. The extreme runoff was the direct result of both melting of anomalously high snowpack and rainfall associated with the 2010–2011 La Niña. The effects of this increased freshwater discharge were observed off Newport, Oregon, 180 km south of the Columbia River mouth. Salinity values as low as 22, nine standard deviations below the climatological value for this period, were registered at the mid-shelf. Using a network of ocean observing sensors and platforms, it was possible to capture the onshore advection of the Columbia River plume from the mid-shelf, 20 km offshore, to the coast and eventually into Yaquina Bay (Newport) during a sustained wind reversal event. Increased freshwater delivery can influence coastal ocean ecosystems and delivery of offshore, river-influenced water may influence estuarine biogeochemistry. Annually, after the spring transition1, winds off the Oregon and Washington coast are predominantly southward (upwelling-favorable) and the Columbia River Plume (CRP) is advected to the south by the coastal upwelling jet, and offshore by the cumulative Ekman transport, detaching the plume from the coast. The shelf currents and wind forcing overwhelm the natural tendency of the plume to turn to the right due to the Coriolis effect, and as a result, relatively fresh water is observed off the Oregon coast2. Departures from this average state, however, can be quite dramatic, with a bi-directional CRP also often influencing the Washington shelf during summer3,4. The location of plume water as well as its freshwater content are important to the Oregon-Washington shelf ecosystem as it affects sediment deposition, nutrient concentrations as well as circulation and strat- ification3. Recent work has shown the importance of the CRP to shelf ecosystems and biogeochemistry including increased primary productivity, enhanced macrozooplankton concentration, delivery of bio- logically important micronutrients, and offshelf chlorophyll export5–8. Because rivers and estuaries differ in their carbon chemistry dynamics from the open shelf, there is increased interest in how these regions interact with respect to ocean acidification. River-influenced water on the open continental shelf can enter coastal estuaries and influence both the physics, including stratification and circulation, and biogeochemistry found there. Since the Columbia River is the largest freshwater source on the U.S. west coast, it is important to estimate the reach of its alongshore influence on both continental shelf ecosystems and coastal estuaries. While a number of observations9–13 reveal frequent intrusions of the CRP into estuaries north of the Columbia River, along the Washington coast, to our knowledge observations of CRP waters entering 1Department of Marine and Coastal Sciences Rutgers, The State University of New Jersey, 71 Dudley Road New Brunswick, NJ 08901. 2College of Earth, Ocean, and Atmospheric Sciences Oregon State University, 104 CEOAS Administration Building, 101 SW 26th St, Corvallis, OR 97331, United States. Correspondence and requests for materials should be addressed to P.L.F.M. (email: [email protected]) SCIENTIFIC REPORTS | 5:17145 | DOI: 10.1038/srep17145 1 www.nature.com/scientificreports/ estuaries south of the Columbia River have not been previously reported, despite the fact that the CRP may extend over 500 km south of the Columbia River mouth2. From mid-May through August 2011, extreme Columbia River discharge reached more than two standard deviations above the mean for most of this period, having a peak discharge of nearly 17,000 m3/s in early June (Fig. 1c). This anomalous discharge as well as the atmospheric circulation and climate anomalies observed over the Pacific Northwest region during spring of 2011 can be explained by an extreme La Niña event14,15. The months of February and March reached the highest monthly Southern Oscillation Index (SOI) since 1866, while the month of April had the highest value since 1903 and the 2nd-highest on record. The impacts of this La Niña in the Pacific Northwest, with approximately a 3-month lag, were characterized by a longer storm season, increased spring snowfall in the Cascade Range, and negative temperature anomalies14. Just as extreme weather events influence terrestrial eco- systems and have potential economic impacts16, it is important to understand the impact of such events on marine ecosystems. Effects of the anomalous discharge from the Columbia River on the coastal ocean thermohaline struc- ture were observed offshore of Newport, Oregon, approximately 180 km south of the Columbia River mouth. Using a suite of sensors and platforms, including three moorings, land-based HF-radar, satellite remote sensing and underwater gliders, we describe the onshore advection of the CRP off Newport, OR, from the mid-shelf, nearly 20km offshore, to the coast and eventually into the Yaquina Bay (Newport) during a sustained wind reversal event. In the next section we present our results, which are structured as follows: first the broader scale weather patterns are characterized as well as their effect on the CR streamflow during the spring/sum- mer of 2011; then the spring transition and its effects on thermohaline structure of the coastal ocean are presented; lastly, a case study is presented, in which both satellite remote sensing and in situ moored observations are used to demonstrate the onshore propagation of the CRP onto the inner-shelf and into the Yaquina bay estuary and the consequent impact in the estuarine biogeochemistry. The results section is followed by the discussion section in which we place our findings in context and summarize and dis- cuss our conclusions. Finally in the methods section we describe the data and methods used in this study. Results Extreme Columbia River Discharge. Abnormally high precipitation rates and snow accumulation were observed in the Pacific Northwest during spring 2011. The May average precipitation map (Fig. 1a) shows values that are 130% of climatological mean, for most of the Columbia River drainage area. Snowpack (Fig. 1b) for most of the region had values ranging from 150–180% of the mean, and several places over 180% of the mean. As a result of snow melt from extremely high levels of snowpack and high precipitation rates during spring 2011, anomalously high Columbia River discharge rates were observed during the spring and summer 2011 (Fig. 1c). The first of two significant discharge peaks occurred from the end of March until the beginning of May, varying from 9,000 to 14,000 m3/s. The second, more signif- icant peak, persisted from mid-May through August. During this period, discharge rates peaked at more than 17,000 m3/s, or 82% above the climatological monthly average. As a direct response to this anoma- lous discharge, surface salinity values as low as 22 were observed 18 km west of Newport, OR at NH-10 on 25–26 May (not shown), nine standard deviations below the climatological value for this period. These were also the lowest recorded values since sustained NH-10 mooring observations began in 1999. La Niña events have been shown to influence streamflow in several regions of the USA, including the Pacific Northwest17,18. Ship observations from 1959–2007, complemented by glider data from 2006–2012, along the Newport Hydrographic (NH) Line, were analyzed to verify the impact of increased river dis- charge from the Columbia River due to La Niña events on salinity during the upwelling season. The Multivariate El Niño/Southern Oscillation Index (MEI)19,20, has a significant correlation with monthly salinity minima (r = 0.44, 95% confidence level of 0.39), and a regression is shown in Fig. 2, with an observed slope of 0.2 (+ /− 0.1). This analysis was conducted between the months of May and September. Only months which had a minimum of nine observations and reached at least 35 miles offshore were used. Thermohaline Structure and Freshwater Content. In 2011, the upwelling season along the Oregon coast occurred from 16 April to 11 September, following the upwelling season definition in Pierce et al.21. In Fig. 3a, freshwater content as a function of cross-shelf distance as well as salinity, tem- perature, density and depth-averaged currents are shown for two glider transects: one at the beginning of the upwelling season, surveyed from 17–23 April 2011 (Fig. 3c), right before the high Columbia River discharge peak, and the second one later in the upwelling season, from 10–14 June 2011 (Fig. 3d), close to the discharge peak. For comparison, the mean and standard deviations of freshwater content estimated for the upwelling season using 272 salinity transects from 2006–2012 are also shown in Fig. 3a. Freshwater content of the water column at the beginning of the upwelling season is confined between the coast and 50 km offshore, varying from 0.5–0.8 m, within one standard deviation from the mean for this time of the year. Later in the season, the second glider transect shows the presence of freshwater along its entire track, from the coast to 80 km offshore. Most of the freshwater content is above one standard deviation from the mean, with a maximum peak of 2.2 m, more than two standard deviations from the mean, centered around 55 km offshore. SCIENTIFIC REPORTS | 5:17145 | DOI: 10.1038/srep17145 2 www.nature.com/scientificreports/ Figure 1.
Load more

Recommended publications
  • Physical and Chemical Characteristics of the Yaquina Estuary, Oregon
    PHYSICAL AND CHEMICAL CHARACTERISTICS OF THE YAQUINA ESTUARY, OREGON Richard J. Callaway MarPoiSol P.O. Box 57 Corvallis, OR 97339 David T. Specht, Project Officer Coastal Ecology Branch U.S. Environmental Protection Agency 2111 S.E. Marine Science Drive Newport, Oregon 97365-5260 2 (Purchase Order #8B06~NTT A) Submitted August 9, 1999 TABLE OF CONTENTS Introduction .................................................................................................................... 1 Area of Study .................................................................................................................. 1 Estuary Classification.............................................. .......................................... 1 Local Communities ............................................................................................... 7 Physical Setting .................................................................................................... 7 Climate ................................................................................................................. ? Winds ................................................................................................................... 8 Tides .................................................................................................................... 8 Currents .............................................................................................................. 9 Estuarine Dynamics and the Hansen-Rattray Classification Scheme ...............................
    [Show full text]
  • Oregon Parks & Recreation Department
    Case File: 4-CP-1$ Date Filed: December 17, 2018 Hearing Date: February 25, 2019/Planning Commission PLANNING STAFF REPORT File No. 4-CP-18 A. APPLICANT: Oregon Parks & Recreation Department (OPRD) (Ian Matthews, Authorized Representative) B. REQUEST: The request is to amend the Parks and Recreation Section of the Newport Comprehensive Plan to approve and adopt the master plans for the Agate Beach State Recreation Site, Yaquina Bay State Recreation Site, and South Beach State Park, as outlined in the OPRD South Beach and Beverly Beach Management Units Plan, dated January 201$. C. LOCATION: 3040 NW Oceanview Drive (Agate Beach State Recreation Site), $42 and $46 SW Government Street (Yaquina Bay State Recreation Site), and 5400 South Coast Highway (South Beach State Park). A list of tax lots associated with each park is included in the application materials. D. LOT SIZE: 1 8.5 acres (Agate Beach State Recreation Site), 32.0 acres (Yaquina Bay State Recreation Site), and 498.3 acres (South Beach State Park). E. STAFF REPORT: 1. Report of Fact a. Plan Designations: Public and Shoreland b. Zone Designations: P-2/”Public Parks” c. Surrounding Land Uses: The Agate Beach State Recreation Site is bordered on the north by a condominium development, on the south by the Best Western Agate Beach Inn, to the east by US 101, and by the ocean on the west. It is bisected by Big Creek and Oceanview Drive. The Yaquina Bay State Recreation Site is located on the bluff at the north end of the Yaquina Bay Bridge. It is bordered by single-family residential and commercial development to the north, US 101 to the east, Yaquina Bay to the south and the ocean to the west.
    [Show full text]
  • OREGON ESTUARINE INVERTEBRATES an Illustrated Guide to the Common and Important Invertebrate Animals
    OREGON ESTUARINE INVERTEBRATES An Illustrated Guide to the Common and Important Invertebrate Animals By Paul Rudy, Jr. Lynn Hay Rudy Oregon Institute of Marine Biology University of Oregon Charleston, Oregon 97420 Contract No. 79-111 Project Officer Jay F. Watson U.S. Fish and Wildlife Service 500 N.E. Multnomah Street Portland, Oregon 97232 Performed for National Coastal Ecosystems Team Office of Biological Services Fish and Wildlife Service U.S. Department of Interior Washington, D.C. 20240 Table of Contents Introduction CNIDARIA Hydrozoa Aequorea aequorea ................................................................ 6 Obelia longissima .................................................................. 8 Polyorchis penicillatus 10 Tubularia crocea ................................................................. 12 Anthozoa Anthopleura artemisia ................................. 14 Anthopleura elegantissima .................................................. 16 Haliplanella luciae .................................................................. 18 Nematostella vectensis ......................................................... 20 Metridium senile .................................................................... 22 NEMERTEA Amphiporus imparispinosus ................................................ 24 Carinoma mutabilis ................................................................ 26 Cerebratulus californiensis .................................................. 28 Lineus ruber .........................................................................
    [Show full text]
  • PHYTOPLANKTON Grass of The
    S. G. No. 9 Oregon State University Extension Service Rev. December 1973 FIGURE 6: Oregon State Univer- sity's Marine Science Center in MARINE ADVISORY PROGRAM Newport, Oregon, is engaged in re- search, teaching, marine extension, and related activities under the Sea Grant Program of the National Oceanic and Atmospheric Adminis- tration. Located on Yaquina Bay, the center attracts thousands of visitors yearly to view the exhibits PHYTOPLANKTON of oceanographic phenomena and the aquaria of most of Oregon's marine fishes and invertebrates. Scientists studying the charac- grass of the sea teristics of life in the ocean (in- cluding phytoplankton) and in estu- aries work in various laboratories at the center. The Marine Science Center is home port for OSU School of Ocea- nography vessels, ranging in size from 180 to 33 feet (the 180-foot BY HERBERT CURL, JR. Yaquina and the 80-foot Cayuse PROFESSOR OF OCEANOGRAPHY are shown at the right). OREGON STATE UNIVERSITY Anyone taking a trip at sea or walking on the beach Want to Know More About Phytoplankton? Press, 1943—out of print; reprinted Ann Arbor: notices that nearshore water along coasts is frequently University Microfilms, Inc., University of Michigan). For the student or teacher who wishes to learn green or brown and sometimes even red. Often these more about phytoplankton, the following publications colors signify the presence of mud or silt carried into offer detailed information about phytoplankton and Want Other Marine Information? the sea by rivers or stirred up from the bottom if the their relationship to the ocean and mankind. Oregon State University's Extension Marine Advis- water is sufficiently shallow.
    [Show full text]
  • A Nutrient-Phytoplankton-Zooplankton Model for Classifying Estuaries Based on Susceptibility to Nitrogen Loads
    A NUTRIENT-PHYTOPLANKTON-ZOOPLANKTON MODEL FOR CLASSIFYING ESTUARIES BASED ON SUSCEPTIBILITY TO NITROGEN LOADS By Yuntao Zhou A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science (Natural Resources and Environment) in the University of Michigan April 18, 2006 Thesis Committee: Professor Donald Scavia, Chair Professor J. David Allan Abstract Estuarine responses to nutrient loads can be remarkably different. Many driving variables including light, water residence time, physical stratification, and temperature are responsible for the diversity of the response. To classify estuaries based on their susceptibility to nutrient loads, a nutrient- phytoplankton- zooplankton (NPZ) model was developed and applied to river-dominated, well-mixed estuaries. Estuaries are classified as having low, medium, high and hyper eutrophic conditions by the model. The result of the model suggests that water residence time is an important controlling variable in the process of achieving a steady-state response to nutrient loads. Although phytoplankton responses to residence time vary under different loads, they have the same positive trend. Phytoplankton responses are almost linear with water residence time initially, then decrease, and eventually plateau. i Table of Contents Part1. Introduction……………………………………………………………………1 Light availability………………………………………………………………………………..2 Water residence time……………………………………………………………………………3 Physical Stratification…………………………………………………………………………..3 Temperature…………………………………………………………………………………….4 Part 2. Modeling Approaches…………………………………………………………5 A simple plankton model (Steele and Henderson, 1981)……………………………………...7 Coastal ecosystem sensitivity to light and nutrient enrichment (Cloern 1999)……………..8 A model for partially mixed estuary (Peterson and Festa, 1984)………………………….....9 CSTT (Comprehensive Studies Task Team) model (Tett, 2003)…………………………….10 ASSETS (Assessment of Estuarine Trophic Status) model (Bricker, 2003) ………………..11 Part 3.
    [Show full text]
  • Water Column Primary Production in the Columbia River Estuary
    WATER COLUMN PRIMARY PRODUCTION IN THE COLUMBIA RIVER ESTUARY I a.~ ~~~~~~~~ 9 Final Report on the Water Column Primary Production Work Unit of the Columbia River Estuary Data Development Program WATER COLUMNNPRIMARY PRODUCTION IN THE COLUMBIA RIVER ESTUARY Contractor: Oregon State University College of Oceanography Principal Investigators: Lawrence F. Small and Bruce E. Frey College of Oceanography Oregon State University Corvallis, Oregon 97331 February 1984 OSU PROJECT TEAM PRINCIPAL INVESTIGATORS Dr. Bruce E. Frey Dr. Lawrence F. Small GRADUATE RESEARCH ASSISTANT Dr. Ruben Lara-Lara TECHNICAL STAFF Ms. RaeDeane Leatham Mr. Stanley Moore Final Report Prepared by Bruce E. Frey, Ruben Lara-Lara and Lawrence F. Small PREFACE The Columbia River Estuarv Data Development Program This document is one of a set of publications and other materials produced by the Columbia River Estuary Data Development Program (CREDDP). CREDDP has two purposes: to increase understanding of the ecology of the Columbia River Estuary and to provide information useful in making land and water use decisions. The program was initiated by local governments and citizens who saw a need for a better information base for use in managing natural resources and in planning for development. In response to these concerns, the Governors of the states of Oregon and Washington requested in 1974 that the Pacific Northwest River Basins Commission (PNRBC) undertake an interdisciplinary ecological study of the estuary. At approximately the same time, local governments and port districts formed the Columbia River Estuary Study Taskforce (CREST) to develop a regional management plan for the estuary. PNRBC produced a Plan of Study for a six-year, $6.2 million program which was authorized by the U.S.
    [Show full text]
  • Structure and Productivity of Marine Benthic Diatom Communities in a Laboratory Model Ecosystem
    AN ABSTRACT OF THE THESIS OF BARRY LEE WULFF for the DOCTOR OF PHILOSOPHY (Name) (Degree) Botany in (Physiological-ecology) presented on /970 (Major) Q1ArrDae) Title: STRUCTURE AND PRODUCTIVITY OF MARINE BENTHIC DIATOM COMMUNITIES IN A LABORATORY MODEL ECO- SYSTEM Redacted for privacy Abstract approved: Dr. C. David McIntire Effects of light intensity, exposure to desiccation, reduced salinity, and thermal elevation on the functional and structural char- acteristics of marine benthic diatom communities were investigated in a laboratory model ecosystem and a respirometer chamber. Measurements of biomass (dry weight and ash-free dry weight) and chlorophyll a were made for each of the communities.Population studies were performed to determine community structure.Finally, photosynthetic rates of the communities at selected light intensities were determined in the respirometer for communities developed in experiments designed to test the effects ofexposure to desiccation and variations in light intensity. Biomass accumulated most rapidly on substrates subjected to high light intensities, without exposure to desiccation. Under inter- tidal conditions, biomass accumulation was progressively greater with less exposure to desiccation.Organic material (ash-free dry weight) was greater on substrates from summer than winter experi- ments. Both reduced salinity and thermal elevation interacted with light to stimulate algal production, and mats of Melosira nummuloides developed rapidly and floated to the surface. Communities acclimated to different light intensities and periods of desiccation responded differently to various light intensities in the respirometer chamber.Substrates receiving little atmospheric ex- posure developed thicker layers of biomass permitting significantly higher rates of photosynthesis as light intensity increased.Generally, substrates developed at low light intensities attained a maximum photosynthetic rate at the lower light intensities in the respirometer, presumably because of an acclimation phenomenon.
    [Show full text]
  • Astoria Formation Are Exposed at Jumpoff Joe
    COAS TAL LANDFORMS N EWPOR T - LI NCOLN C IT Y Vo l. 36 , No.5 M ay 1974 STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES The Ore Bin Published Monthly By STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES Head Office: 1069 State Office Bldg., Portland, Oregon - 97201 Telephone: 229 - 5580 FIELD OFFICES 2033 First Street 521 N. E. "E" Street Boker 97814 Grants Pass 97526 xxxxxxxxxxxxxxxxxxxx Subscription rate - $2.00 per colenc:br yeor Available bock issues $.25 each Second closs postage paid at Portland, Oregon GOVERNING BOARD R. W. deWeese, Portland, Chairman Willicwn E. Miller, Bend H. lyle Von Gordon, Grants Pass STATE GEOLOGIST R. E. Corcoran GEOLOGISTS IN CHARGE OF FIELD OFFICES Howard C. Brooks, Boker Len Romp, Grants Pass Permission i, gront.d to r.int information contained herein . Credit gillen the Stot. of Oregon o.pcrtment of Geology and Min.al Industri. for compiling thi, information will be appreciated. Stote of O r egon The ORE BIN Deportmentof Geology ond Minerol Indu$ITies Volum e 36,No.5 1069 Siote Office Bldg. May 1974 Portlond Oregon 97201 ROCK UNITS AND COASTAL LANDFORMS BETWEEN NEWPORT AND liNCOLN CITY, OREGON Ernest H. lund Deportment of Geology, University of Oregon The coost between Newport and lincoln City is composed of sedimen­ tary rock punctuated locally by volcanic rock. Where the shore is on sedi­ mentary rock, it is characterized by a long, sandy beach in front of a sea cliff. Perched above the sea cliff is the sandy marine terrace that fringes most of this segment of the Oregon coost.
    [Show full text]
  • Oceanography of the Pacific Northwest Coastal Ocean and Estuaries with Application to Coastal Ecosystems
    Oceanography of the Pacific Northwest Coastal Ocean and Estuaries with Application to Coastal Ecosystems Barbara M. Hickey1 and Neil S. Banas School of Oceanography Box 355351 University of Washington, Seattle, WA 98195-7940 Tel.: 206 543 4737 e-mail: [email protected] Submitted to Estuaries May 2002 1Corresponding author. Hickey and Banas 2 Abstract This paper reviews and synthesizes recent results on both the coastal zone of the U.S. Pacific Northwest (PNW) and several of its estuaries, as well as presenting new data from the PNCERS program on links between the inner shelf and the estuaries, and smaller-scale estuarine processes. In general ocean processes are large-scale on this coast: this is true of both seasonal variations and event-scale upwelling-downwelling fluctuations, which are highly energetic. Upwelling supplies most of the nutrients available for production, although the intensity of upwelling increases southward while primary production is higher in the north, off the Washington coast. This discrepancy is attributable to mesoscale features: variations in shelf width and shape, submarine canyons, and the Columbia River plume. These and other mesoscale features (banks, the Juan de Fuca eddy) are important as well in transport and retention of planktonic larvae and harmful algae blooms. The coastal-plain estuaries, with the exception of the Columbia River, are relatively small, with large tidal forcing and highly seasonal direct river inputs that are low-to-negligible during the growing season. As a result primary production in the estuaries is controlled principally not by river-driven stratification but by coastal upwelling and bulk exchange with the ocean.
    [Show full text]
  • Komar (1992) Oregon Coastal Processes and Hazards
    Ocean processes and hazards along the Oregon coast by Paul D. Komar, College of Oceanography. Oregon State Unil'ersiry. CQrvollis, Oregon INTRODUCTION tween the headlands. Ponions of these beaches fonn the ocean shores Ear ly explorers of the Oregon coast (Figure I) were impressed of sand spits such as Siletz. Netans, Ne halem, and Bayocean. Land­ by the tremendou s variety of its scenery. Today, visitors can still ward from the spits are bays or estuaries of ri vers that drain the appreciate those same qualities. The low rolling mountains of the Coast Range. Coast Range serve as a backdrop for most of the length of its ocean The first western explorers and setllers were attracted to the Oregon shore. In the south, the Klamath Mountains elltend to the coast, coast by the potential richness of ilS natural resources. Earliest were and the edge of the land is characterized by high cliffs being slowly the traders who obtained pelts of ocean otter and beaver from the cut away by ocean waves. The most resislanl roc ks persist as sea Indians. Later came prospectors who sought gol d in the beach sands stacks scattered in th e offshore. Sand and gravel are able loaccumulate and coastal mountai ns but in many cases were content to settle down only in sheltered areas where they form small pocket beaches within and "mine" the fenile farm lands found along the river margins. Others the otherwise rocky landscape. turned to fishi ng, supponing themselves by harvesting the abundant The more extensive stretches of beach are found in the lower Dungeness crab, salmon, and other fish in the coastal waters.
    [Show full text]
  • Effect of Nutrient Enrichment on Marine Benthic Diatoms in Yaquina Bay, Oregon Redacted for Privacy Abstract Approved By
    AN ABSTRACT OF THE THESIS OF Nanette Clark Cardon for the degree of Master of Science in Botany presented on May 18, 1981. Title: Effect of nutrient enrichment on marine benthic diatoms in Yaquina Bay, Oregon Redacted for privacy Abstract approved by: Sediment was fertilized with f/2 algal growth medium in situ and in the laboratory daily for one week. Sampling strategy incorporated two intertidal heights and two sites. Experiments were done in August and January. No signifi- cant changes in chlorophyll a or diatom community struct- ure were observed after ten days of growth in either the field or the laboratory experiments. Laboratory experiments also showed slightly increased gross primary production (p <.10) and increased oxygen uptake (p < .01) associated with nutrient enrichment. Unlike planktonic diatoms, sediment-associated diatoms in Yaquina Bay show no nutrient limitation. Thus other factors probably control diatom growth in these sediments such as light intensity, photoperiod, intertidal height, sediment stability and organic content, and animalconsurnp- tion. Effect of Nutrient Enrichment on Marine Benthic Diatoms in Yaquina Bay, Oregon by Nanette Clark Cardon A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Science Completed May 18, 1981 Commencement June 1982 APPROVED: Redacted for privacy Redacted for privacy Redacted for privacy Dean ot Gractute Schoo Date thesis is presented May 18, 1981 Typed by (Debra Martin) for Nanette Clark Cardon ACKNOWLEDGEMENT My special thanks to Dr. Harry Phinney for his contin- ued support as both advisor and friend. I'd like to acknowledge Michael W.
    [Show full text]
  • Basalt at Depoe Bay, It Cooled More Slowly and the Crystals That Constitute the Rock Grew Much Larger
    L3BRARY Marine Science Laboratory Oregon State University Vol . 33, No . 5 May 1 971 STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES The Ore Bin Published Monthly By • STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES • Head Office: 1069 State Office Bldg., Portland, Oregon - 97201 Telephone: 229 - 5580 FIELD OFFICES 2033 First Street 521 N. E. "E" Street Baker 97814 Grants Pass 97526 X X X X X X X XXX X XX X X XX X XX Subscription rate $1.00 per year. Available back issues 10 cents each. Second class postage paid at Portland, Oregon 2 2 2 2 2 2 2 2 2 2 '5Z` 2 2 2 2 2 2 2 2 2 • GOVERNING BOARD • Fayette I. Bristol, Rogue River, Chairman R. W. deWeese, Portland Harold Banta, Baker STATE GEOLOGIST R. E. Corcoran GEOLOGISTS IN CHARGE OF FIELD OFFICES Norman S. Wagner, Baker Len Ramp, Grants Pass 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 • Permission is granted to reprint information contained herein. Credit given the State of Oregon Department of Geology and Mineral Industries for compiling this information will be appreciated. • State of Oregon The ORE BIN Department of Geology Volume 33, No. 5 and Mineral Industries • 1069 State Office Bldg. May 1971 Portland Oregon 97201 a VISITOR'S GUIDE TO THE GEOLOGY OF THE COASTAL AREA NEAR BEVERLY BEACH STATE PARK, OREGON * By Parke D. Snavely, Jr. and Norman S. MacLeod ** Introduction The Oregon coast between Yaquina Head and Government Point owes its scenic grandeur to a unique wedding of ancient and recent marine environ- ments.
    [Show full text]