Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Research and Technical Reports (15)
- Fisheries (12)
- Aquatic Health Sciences Peer-Reviewed Articles (11)
- Marine Resource Reports (7)
- Fisheries Science Peer-Reviewed Articles (6)
-
- Management (6)
- Biological Sciences Peer-Reviewed Articles (5)
- Fisheries Science Reports (4)
- Fishery Resource Grant Reports (4)
- Physical Sciences Peer-Reviewed Articles (4)
- Virginia Sea Grant Reports (4)
- Scallops (3)
- Tools (3)
- American Eel (2)
- Anguilla rostrata (2)
- Atlantic (2)
- Data (2)
- ESL Publications (2)
- Fisheries Science (2)
- Virginia (2)
- 5-Bisphosphate Carboxylase/Oxygenase; Concentrating Mechanisms; Diel Rhythms; Waters; Expression; Diatoms; Cyanobacteria; Productivity (1)
- Abundance (1)
- Alosa sapidissima (1)
- American Shad (1)
- Aquaculture training (1)
- CCRM Research and Reports (1)
- Central Equatorial Pacific; Chlorophyll-Labeling Method; Sub-Arctic Pacific; Community Structure; Photosynthetic Pigments; Grazing Impact; Chatham Rise; Ocean; Iron; Carbon (1)
- Chesapeake Bay (1)
- Chesapeake Bay Multispecies Monitoring and Assessment Program (ChesMMAP) (1)
- Coastal-Plain Estuary; Boundary-Layer; Turbulence; Momentum; Dynamics; Rotation; Profile; Surface; Cycle; Flow (1)
- Publication
Articles 1 - 30 of 51
Full-Text Articles in Life Sciences
Abstracts Of Papers Presented At The 16th International Pectinid Workshop Halifax, Nova Scotia, Canada May 11–18, 2007, G. Jay Parsons
Abstracts Of Papers Presented At The 16th International Pectinid Workshop Halifax, Nova Scotia, Canada May 11–18, 2007, G. Jay Parsons
VIMS Articles
VIMS Author Contributions: Scallop dredge selectivity: A review of sequential ring size increases from 1994 to 2003 in the US sea scallop fishery By: DuPaul, William D.; Rudders, David B. Pages: 1307-1308 Industry-based sea scallop dredge surveys in support of rotational area management By: Rudders, B.; DuPaul, William D. Pages: 1337-1338 Size-selectivity of the commercial northwest Atlantic sea scallop (Placopecten magellanicus) dredge By: Yochum, Noelle; DuPaul, William D. Pages: 1355-1355
Understanding Localized Movements And Habitat Associations Of Summer Flounder In Chesapeake Bay Using Passive Acoustic Arrays : Final Report, Mary C. Fabrizio, Mark J. Henderson, Jon A. Lucy
Understanding Localized Movements And Habitat Associations Of Summer Flounder In Chesapeake Bay Using Passive Acoustic Arrays : Final Report, Mary C. Fabrizio, Mark J. Henderson, Jon A. Lucy
Reports
No abstract provided.
Evaluation Of Striped Bass Stocks In Virginia : Monitoring And Tagging Studies, 2004-2008 - Annual Report 1 September 2006 - 31 August 2007, Philip W. Sadler, John M. Hoenig, Robert E. Harris, Rebecca J. Wilk, Lydia M. Goins
Evaluation Of Striped Bass Stocks In Virginia : Monitoring And Tagging Studies, 2004-2008 - Annual Report 1 September 2006 - 31 August 2007, Philip W. Sadler, John M. Hoenig, Robert E. Harris, Rebecca J. Wilk, Lydia M. Goins
Reports
This report presents the results of striped bass (Morone saxatilis) tagging and monitoring activities in Virginia during the period 1 September 2006 through 31 August 2007. It includes an assessment of the biological characteristics of striped bass taken from the 2007 spring spawning run, estimates of annual survival and fishing mortality based on annual spring tagging, and the preliminary results of the fall 2006 study that documents the prevalence of mycobacterial infections of striped bass in Chesapeake Bay. The information contained in this report is required by the Atlantic States Marine Fisheries Commission and is used to implement a coordinated …
Getting Started With The Water Harvest Program A Guide For Watermen To Make More For Their Catch By Selling Direct At Farmers’ Markets, Jimmy Hogge, Paige Hogge
Getting Started With The Water Harvest Program A Guide For Watermen To Make More For Their Catch By Selling Direct At Farmers’ Markets, Jimmy Hogge, Paige Hogge
Reports
No abstract provided.
Evaluating Recruitment Of American Eel, Anguilla Rostrata, To The Potomac River (Spring 2007), Hank Brooks, Wendy A. Lowery, Aimee Halvorson, James Gartland, Marcel M. Montane
Evaluating Recruitment Of American Eel, Anguilla Rostrata, To The Potomac River (Spring 2007), Hank Brooks, Wendy A. Lowery, Aimee Halvorson, James Gartland, Marcel M. Montane
Reports
Harvests of American eel along the U.S. Atlantic Coast have declined in recent years, and similar patterns have been noted in the Canadian Maritime Provinces as well as in Europe with its congener, A. anguilla (Ciccotti et al., 4 1995). Fishery independent indices of abundance have also shown a decline in American eel populations in recent years (Richkus and Whalen, 1999; Geer, 2003; Montane and Fabrizio, 2006). Possible explanations for this decline include Gulf Stream shifts, pollution, overfishing, parasites, and barriers to fish passage (Castonguay et al., 1994; Haro et al., 2000). In addition, local factors such as unfavorable wind-driven …
Final Report An Assessment Of Sea Scallop Abundance And Distribution In Selected Closed Areas: Georges Bank Area I, Nantucket Lightship And Elephant Trunk, William D. Dupaul, David Rudders
Final Report An Assessment Of Sea Scallop Abundance And Distribution In Selected Closed Areas: Georges Bank Area I, Nantucket Lightship And Elephant Trunk, William D. Dupaul, David Rudders
Reports
No abstract provided.
Estimating Relative Juvenile Abundance Of Ecologically Important Finfish And Invertebrates In The Virginia Portion Of Chesapeake Bay (Award No. Na03nmf4570378) June 2003-May 2007, Mary C. Fabrizio, Marcel M. Montaine
Estimating Relative Juvenile Abundance Of Ecologically Important Finfish And Invertebrates In The Virginia Portion Of Chesapeake Bay (Award No. Na03nmf4570378) June 2003-May 2007, Mary C. Fabrizio, Marcel M. Montaine
Reports
The fisheries trawl survey conducted by the Virginia Institute of Marine Science (VIMS) is the oldest continuing trawl monitoring program (52 years) for marine and estuarine fishes in the United States. This survey provides a monthly baseline assessment of the abundance of juvenile marine and estuarine fishes and some invertebrates in the tidal and mainstem Chesapeake Bay. The survey provides crucial, real time data to various state, regional and national fisheries management agencies, including the Virginia Marine Resources Commission (VMRC), the Atlantic States Marine Fisheries Commission (ASMFC), the Mid-Atlantic Fisheries Management Council (MAFMC), and the National Marine Fisheries Service (NMFS). …
Estimating Relative Abundance Of Young-Of-The-Year American Eel Anguilla Rostrata In The Virginia Tributaries Of Chesapeake Bay (Spring 2006), Marcel M. Montane, Wendy A. Lowery, Hank Brooks, Aimee D. Halvorson
Estimating Relative Abundance Of Young-Of-The-Year American Eel Anguilla Rostrata In The Virginia Tributaries Of Chesapeake Bay (Spring 2006), Marcel M. Montane, Wendy A. Lowery, Hank Brooks, Aimee D. Halvorson
Reports
The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan (hereafter referred to as FMP) for the American eel in November 1999. The FMP focuses on increasing coastal states’ efforts to collect American eel data through both fishery dependent and fishery independent studies. Consequently, member jurisdictions (including Virginia) agreed to implement an annual survey for YOY American eels. The survey is intended to “…characterize trends in annual recruitment of the YOY eels over time [to produce a] qualitative appraisal of the annual recruitment of American eel to the U.S. Atlantic Coast” (ASMFC, 2000). The development of these …
Estimating Capacity And Efficiency In Fisheries With Undesirable Outputs, Rolf Fare, James E. Kirkley, John B. Walden
Estimating Capacity And Efficiency In Fisheries With Undesirable Outputs, Rolf Fare, James E. Kirkley, John B. Walden
Reports
No abstract provided.
Shallow Water Fish Communities And Coastal Development Stressors In The Lynnhaven River, Donna M. Bilkovic, David Stanhope, Kory Angstadt
Shallow Water Fish Communities And Coastal Development Stressors In The Lynnhaven River, Donna M. Bilkovic, David Stanhope, Kory Angstadt
Reports
Coastal development pressures in the Mid-Atlantic have been attributed to significant negative impacts to aquatic ecosystems. The Lynnhaven River watershed, located in the southernmost extent of the Chesapeake Bay and encompassing Virginia Beach, is an example of a shallow-water tidal system under intense development pressure that is confronted with multiple and often conflicting coastal management issues. Rapid development in and around the City of Virginia Beach over the past few decades has led to the loss of natural buffers and habitat (e.g. oyster, wetlands and seagrasses), increased sedimentation, and degraded water quality. The Lynnhaven Ecosystem Restoration Project, led by U.S …
An Assessment Of Sea Scallop Abundance And Distribution In The Georges Bank Closed Area Ii, William D. Dupaul, David Rudders
An Assessment Of Sea Scallop Abundance And Distribution In The Georges Bank Closed Area Ii, William D. Dupaul, David Rudders
Reports
No abstract provided.
An Assessment Of Sea Scallop Abundance And Distribution In The Georges Bank Closed Area Ii - Preliminary Results, William D. Dupaul, David Rudders
An Assessment Of Sea Scallop Abundance And Distribution In The Georges Bank Closed Area Ii - Preliminary Results, William D. Dupaul, David Rudders
Reports
No abstract provided.
Ecosystem Services Related To Oyster Restoration, Ld Coen, Rochelle Brumbaugh, D Bushek, R Grizzle, Mark Luckenbach, Et Al
Ecosystem Services Related To Oyster Restoration, Ld Coen, Rochelle Brumbaugh, D Bushek, R Grizzle, Mark Luckenbach, Et Al
VIMS Articles
The importance of restoring filter-feeders, such as the Eastern oyster Crassostrea virginica, to mitigate the effects of eutrophication (e.g. in Chesapeake Bay) is currently under debate. The argument that bivalve molluscs alone cannot control phytoplankton blooms and reduce hypoxia oversimplifies a more complex issue, namely that ecosystem engineering species make manifold contributions to ecosystem services. Although further discussion and research leading to a more complete understanding is required, oysters and other molluscs (e.g. mussels) in estuarine ecosystems provide services far beyond the mere top-down control of phytoplankton blooms, such as (1) seston filtration, (2) benthic–pelagic coupling, (3) creation of refugia …
Annual Progress Report - 2006 Data Collection And Analysis In Support Of Single And Multispecies Stock Assessments In Chesapeake Bay: The Chesapeake Bay Multispecies Monitoring And Assessment Program, Christopher F. Bonzek, Robert J. Latour, James Gartland
Annual Progress Report - 2006 Data Collection And Analysis In Support Of Single And Multispecies Stock Assessments In Chesapeake Bay: The Chesapeake Bay Multispecies Monitoring And Assessment Program, Christopher F. Bonzek, Robert J. Latour, James Gartland
Reports
Historically, fisheries management has been based on the results of single-species stock assessment models that focus on the interplay between exploitation level and sustainability. There currently exists a suite of standard and accepted analytical frameworks (e.g., virtual population analysis (VPA), biomass dynamic production modeling, delay difference models, etc.) for assessing the stocks, projecting future stock size, evaluating recovery schedules and rebuilding strategies for overfished stocks, setting allowable catches, and estimating fishing mortality or exploitation rates. A variety of methods also exist to integrate the biological system and the fisheries resource system, thereby enabling the evaluation of alternative management strategies on …
Virginia Shellfish Aquaculture Situation And Outlook Report : Results Of The 2005-2007 Virginia Shellfish Aquaculture Crop Reporting Survey, Thomas J. Murray, Michael J. Oesterling
Virginia Shellfish Aquaculture Situation And Outlook Report : Results Of The 2005-2007 Virginia Shellfish Aquaculture Crop Reporting Survey, Thomas J. Murray, Michael J. Oesterling
Reports
Continued growth of the shellfish aquaculture industry in Virginia has added significant value to the state’s seafood marketplace. Today, watermen continue to harvest both hard clams and oysters from the state’s public resources, albeit at diminished rates. At the same time, Virginia’s watermen-farmers are providing growing quantities of additional quality shellfish to consumers. Following the lead of the hard clam industry, there has been a significant transition to intensive aquaculture of native oysters in recent years. The once extensive oyster planting has disappeared primarily as a result of endemic oyster diseases and increasing wildlife predation of seed oysters. In its …
Conference Proceedings Water Access 2007: A National Symposium On Working Waterways & Waterfronts, Virginia Sea Grant
Conference Proceedings Water Access 2007: A National Symposium On Working Waterways & Waterfronts, Virginia Sea Grant
Reports
No abstract provided.
Report And Recommendations Of The Blue Ribbon Oyster Panel, Blue Ribbon Oyster Panel
Report And Recommendations Of The Blue Ribbon Oyster Panel, Blue Ribbon Oyster Panel
Reports
The maps are generated to illustrate the results of the targeting effort following the protocol described above. The authors recognize this level of targeting does not preclude the need for field inspection at potential sites prior to reef construction. The atlas is comprised of a series of boxes preceded by an index locator. The scale of each box may vary. The potential restoration areas are illustrated in red. The legend reports the total acres available for restoration within the boundary of each box. At this time, the size of individual restoration sites can only be retrieved using the digital data …
Effects Of Oyster Population Restoration Strategies On Phytoplankton Biomass In Chesapeake Bay: A Flexible Modeling Approach, Rs Fulford, Dl Brietburg, Rie Newell, Wm Kemp, Mw Luckenbach
Effects Of Oyster Population Restoration Strategies On Phytoplankton Biomass In Chesapeake Bay: A Flexible Modeling Approach, Rs Fulford, Dl Brietburg, Rie Newell, Wm Kemp, Mw Luckenbach
VIMS Articles
Cultural eutrophication in estuaries and other coastal systems has increased over the last 50 yr. Some recently proposed strategies to reverse this trend have included the restoration of bivalve suspension feeders as an ecological tool for reducing phytoplankton biomass. The ecological benefits accruing from such bivalve restoration will be dependent on the characteristics of the estuary, as well as how restoration is implemented. We developed a filtration model to estimate the effect of bivalve restoration on the rate of phytoplankton removal over a range of spatial and temporal scales and used it to compare alternate restoration strategies for the eastern …
Monitoring Relative Abundance Of American Shad In Virginia Rivers 2006 Annual Report, John E. Olney, Kristen Delano Walter
Monitoring Relative Abundance Of American Shad In Virginia Rivers 2006 Annual Report, John E. Olney, Kristen Delano Walter
Reports
Concern about the decline in landings of American shad (Alosa sapidissima) along the Atlantic coast prompted the development of an interstate fisheries management plan (FMP) under the auspices of the Atlantic States Marine Fisheries Management Program (ASMFC 1999). Legislation enables imposition of federal sanctions on fishing in those states that fail to comply with the FMP. To be in compliance, coastal states are required to implement and maintain fishery-dependent and fishery-independent monitoring programs as specified by the FMP. For Virginia, these requirements include spawning stock assessments, the collection of biological data on the spawning run (e.g., age-structure, sex ratio, and …
Specific Identification Of Western Atlantic Ocean Scombrids Using Mitochondrial Dna Cytochrome C Oxidase Subunit I (Coi) Gene Region Sequences, Ma Paine, Jan Mcdowell, John E. Graves
Specific Identification Of Western Atlantic Ocean Scombrids Using Mitochondrial Dna Cytochrome C Oxidase Subunit I (Coi) Gene Region Sequences, Ma Paine, Jan Mcdowell, John E. Graves
VIMS Articles
Identification of scombrids (tunas, mackerels, bonitos, etc.) is difficult when morphological characters are ambiguous or missing, such as with early life history stages or tissues found in the stomachs of predators. The mitochondrial cytochrome c oxidase subunit I (COI) gene region was evaluated as a molecular marker for the specific identification of the 17 members of the family Scombridae common to the western Atlantic Ocean. A 950 base pair region in the COI gene was sequenced from up to 20 individuals of each species, and suites of nucleotide polymorphisms that unambiguously distinguish among these scombrid species were identified. A shorter …
Characterization Of A Rediscovered Haplosporidian Parasite From Cultured Penaeus Vannamei, Lm Nunam, Dv Lightner, Cr Pantoja, Na Stokes, Kimberly S. Reece
Characterization Of A Rediscovered Haplosporidian Parasite From Cultured Penaeus Vannamei, Lm Nunam, Dv Lightner, Cr Pantoja, Na Stokes, Kimberly S. Reece
VIMS Articles
Mortalities of Penaeus vannamei, cultured in ponds in Belize, Central America, began during the last part of the grow-out cycle during the cold weather months from September 2004 through February 2005. Tissue squashes of infected hepatopancreata and histological examination of infected shrimp revealed that the mortalities might have been caused by an endoparasite. To confirm the diagnosis, DNA was extracted from ethanol preserved hepatopancreata and the small-subunit rRNA gene was sequenced. The 1838 by sequence was novel and phylogenetic analysis placed the P. vannamei parasite within the phylum Haplosporidia as a sister taxon to a clade that includes Bonamia and …
Northeast Area Monitoring And Assessment Program (Neamap) Mid-Atlantic Nearshore Trawl Program Pilot Survey Completion Report, Christopher F. Bonzek, James Gartland, Robert J. Latour
Northeast Area Monitoring And Assessment Program (Neamap) Mid-Atlantic Nearshore Trawl Program Pilot Survey Completion Report, Christopher F. Bonzek, James Gartland, Robert J. Latour
Reports
Concerns regarding the status of fishery-independent data collection from the continental shelf waters between Cape Hatteras, North Carolina and the U.S. / Canadian border led the Atlantic States Marine Fisheries Commission’s (ASMFC) Management and Science Committee (MSC) to draft a resolution in 1997 calling for the formation the Northeast Area Monitoring and Assessment Program (NEAMAP) (ASMFC 2002). NEAMAP is a cooperative state-federal program modeled after the Southeast Area Monitoring and Assessment Program (SEAMAP), which had been coordinating fishery-independent data collection south of Cape Hatteras since the mid-1980s (Rester 2001). The four main goals of this new program directly address the …
Virginia Game Fish Tagging Program Annual Report 2006, John A. Lucy, C.M. Bain Iii
Virginia Game Fish Tagging Program Annual Report 2006, John A. Lucy, C.M. Bain Iii
Reports
The Virginia Game Fish Tagging Program (VGFTP), initiated in 1995, coordinates tagging and a tag-recapture fish database generated through contributed efforts of a dedicated corps of trained marine anglers. Through 2006, the program’s database includes over 103,000 tagged fish records of tag-released fish and approximately over 10,300 recapture records (Table 4).
The Importance Of Tidal And Lateral Asymmetries In Stratification To Residual Circulation In Partially Mixed Estuaries, Me Scully, Carl T. Friedrichs
The Importance Of Tidal And Lateral Asymmetries In Stratification To Residual Circulation In Partially Mixed Estuaries, Me Scully, Carl T. Friedrichs
VIMS Articles
Measurements collected in the York River estuary, Virginia, demonstrate the important impact that tidal and lateral asymmetries in turbulent mixing have on the tidally averaged residual circulation. A reduction in turbulent mixing during the ebb phase of the tide caused by tidal straining of the axial density gradient results in increased vertical velocity shear throughout the water column during the ebb tide. In the absence of significant lateral differences in turbulent mixing, the enhanced ebb-directed transport caused by tidal straining is balanced by a reduction in the net seaward-directed barotropic pressure gradient, resulting in laterally uniform two-layer residual flow. However, …
Temporal And Vertical Dynamics In Picoplankton Photoheterotrophic Production In The Subtropical North Pacific Ocean, Matthew Church, Hugh Ducklow, Rm Letelier, David Karl
Temporal And Vertical Dynamics In Picoplankton Photoheterotrophic Production In The Subtropical North Pacific Ocean, Matthew Church, Hugh Ducklow, Rm Letelier, David Karl
VIMS Articles
The marine ecosystem of the West Antarctic Peninsula (WAP) extends from the Bellingshausen Sea to the northern tip of the peninsula and from the mostly glaciated coast across the continental shelf to the shelf break in the west. The glacially sculpted coastline along the peninsula is highly convoluted and characterized by deep embayments that are often interconnected by channels that facilitate transport of heat and nutrients into the shelf domain. The ecosystem is divided into three subregions, the continental slope, shelf and coastal regions, each with unique ocean dynamics, water mass and biological distributions. The WAP shelf lies within the …
Detection Of Panulirus Argus Virus 1 In Caribbean Spiny Lobsters, Mm Montgomery-Fullerton, Ra Cooper, Km Kauffman, Jeffrey D. Shields, Re Raftlaff
Detection Of Panulirus Argus Virus 1 In Caribbean Spiny Lobsters, Mm Montgomery-Fullerton, Ra Cooper, Km Kauffman, Jeffrey D. Shields, Re Raftlaff
VIMS Articles
Panulirus argus Virus 1 (PaV1) is a pathogenic virus that infects Caribbean spiny lobsters P. argus in the Florida Keys. We have developed a PCR detection assay for PaV1 for the purpose of studying the natural history of the virus and for monitoring the prevalence of infection. The detection of the virus in hemolymph and other tissues is based on the PCR amplification of a 499 bp product using specific primers designed from a cloned fragment of the PaV1 genome. The sensitivity limit for the assay was 1.2 fg of purified viral DNA. The PaV1 primers did not react with …
New Nemertean Worms (Carcinonemertidae) On Bythograeid Crabs (Decapoda : Brachyura) From Pacific Hydrothermal Vent Sites, Jeffrey D. Shields, M Segonzac
New Nemertean Worms (Carcinonemertidae) On Bythograeid Crabs (Decapoda : Brachyura) From Pacific Hydrothermal Vent Sites, Jeffrey D. Shields, M Segonzac
VIMS Articles
Several species of crabs from hydrothermal vent sites in the Pacific Ocean Were found to be infested by small, symbiotic nemertean worms. Worms occurred on both male and female crabs, and were located in mucous sheaths adhering to the axillae between the limbs of males and females, the setae of the pleopods of females, and the sterna of infested male and female crabs. Only juvenile and regressed adult worms were observed, primarily because no ovigerous hosts were examined. Similar species of worms mature by eating eggs, then regress or die after host eclosion. Based on the size of the worms …
Heat Shock Protein (Hsp70) Expression And Thermal Tolerance In Sublethally Heat-Shocked Eastern Oysters Crassostrea Virginica Infected With The Parasite Perkinsus Marinus, Vg Encomio, Fle Chu
Heat Shock Protein (Hsp70) Expression And Thermal Tolerance In Sublethally Heat-Shocked Eastern Oysters Crassostrea Virginica Infected With The Parasite Perkinsus Marinus, Vg Encomio, Fle Chu
VIMS Articles
To investigate whether sublethal heat shock protects Perkinsus marinus (Dermo)infected oysters Crassostrea virginica from lethal heat stress, and the effects of P. marinus infection on sublethal heat shock response, oysters were first experimentally challenged with P. marinus. Then, when infections in oysters progressed to moderate levels (parasite burden = 10(4) to 10(5) cells g(-1) wet tissue weight), oysters were treated with a sublethal heat shock at 40 C for 1 h (heat shock + Dermo challenge). Other treatment groups included heat-shocked, unchallenged (non-P. marinus challenged) oysters and non-heat-shocked, P. marinus-challenged and -unchallenged oysters. Thermal tolerance was compared among these treatments …
Top-Down And Bottom-Up Controls On Sediment Organic Matter Composition In An Experimental Seagrass Ecosystem, Ac Spivak, Elizabeth A. Canuel, Je Duffy, Jp Richardson
Top-Down And Bottom-Up Controls On Sediment Organic Matter Composition In An Experimental Seagrass Ecosystem, Ac Spivak, Elizabeth A. Canuel, Je Duffy, Jp Richardson
VIMS Articles
We tested the singular and interactive effects of resource availability (light) and community composition (food chain length and herbivore species richness) on eelgrass (Zostera marina) ecosystem properties and functioning with an experimental mesocosm system. Food chain length was manipulated through the presence or absence of blue crab (Callinectes sapidus) predators, whereas grazer species richness varied across three levels (zero, two, or four crustacean species). We found important and interacting effects of bottom-up and top-down forcings on sediment organic matter (SOM) composition. Light increased eelgrass and algal biomass and sediment organic carbon and nitrogen content. Increasing grazer diversity generally decreased algal …
Taxonomic Composition And Growth Rates Of Phytoplankton Assemblages At The Subtropical Convergence East Of New Zealand, L Delizo, Walker O. Smith Jr., J Hall
Taxonomic Composition And Growth Rates Of Phytoplankton Assemblages At The Subtropical Convergence East Of New Zealand, L Delizo, Walker O. Smith Jr., J Hall
VIMS Articles
Off the eastern coast of New Zealand, warm, saline, nutrient-poor Subtropical Waters (STW) are separated from. cool, fresher, relatively nutrient-rich Sub-Antarctic Waters (SAW) by the Subtropical Convergence (STC). The Chatham Rise, a submarine rise, restricts. the latitudinal movement of the STC as well as mixing of STW and SAW Due to this restriction, this sector of the STC is characterized by sharp gradients in temperature, macro-(nitrate, silicate and phosphate) and micro- (iron) nutrient concentrations. Shipboard incubations were conducted during austral spring 2000 and 2001 to test the hypothesis that these gradients affect the taxonomic composition and/or growth rates of phytoplankton …