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Community Gradients
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2019
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Laurence M. Gould
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Project Title: |
Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity |
Project Status: |
Submitted |
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Principal Investigator: |
Charles D. Amsler, UAB |
Project Institution: |
UAB |
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Project ID: |
105742 |
Version #: |
1 |
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Date Submitted: |
4/1/2017 4:21:00 PM |
Created By: |
Charles D. Amsler |
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Date Last Modified: |
8/20/2018 10:32:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OPP/ANT - 1744550 - Funded |
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Summary of Field Work: |
Macroalgae that dominate the biomass and structure of shallow-water benthic communities on the WAP greatly diminish over the southern WAP. Our main objectives are: 1) To determine where the changes in community structure from macroalgal-dominated to non-macroalgal-dominated communities occur; 2) To determine why this gradient in macroalgal community structure exists; and 3) To gain an understanding of the impacts of the changes in macroalgal community importance on higher trophic levels. |
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Summary of Facility Requirements: |
In year 1 we plan to use scuba diving to sample at least nine and, to the extent that conditions allow, up to as many as 18 sites assuming 24 days of dedicated ship time. We will quantify the macroalgal cover using video transect techniques and will collect macroalgae and invertebrates for later biochemical and isotope analyses. Some of these collections will utilize an airlift suction device. We will also collect benthic microalgae at these sites and phytoplankton from nearby but deeper waters. At each site we will mark individuals of a common large brown alga for subsequent relocation in year 2.
In year 2 we will use our data from year 1 to select a subset of these same sites for more detailed quantification of community structure. We expect that this would take two or perhaps three days per site and anticipate sampling a minimum of four and perhaps as many as eight sites total with 24 days of dedicated ship time. We will repeat the macroalgal video transects as in year 1. In addition, we will analyze standing macroalgal species composition and biomass and also invertebrate assemblages by harvesting quadrats first by hand and then with an airlift suction device. Samples for later biochemical and isotope analyses will be subsampled from these collections and if necessary, additional by-hand collections of larger invertebrates may be made for these analyses. We will relocate and re-measure the algae marked in year 1. We will also measure the photosynthetic performance of some of the macroalgal species. |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1009316 |
Created By: |
Charles D. Amsler |
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Date Last Modified: |
4/1/2017 4:21:00 PM |
Date Submitted: |
4/1/2017 4:21:00 PM |
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Year: |
2019
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Ship/Facility: |
Laurence M. Gould
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Optimum Start Date:
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2/15/2019 |
Dates to Avoid: |
: We request that the cruises be scheduled between February and April in each year, although beginning sometime in January would be acceptable if a ship is available to support the work. No early than January or February is desirable to minimize the chances that sea ice will prevent access to sites, particularly the more southerly ones, and particularly if it is a heavy sea ice year. No later than April, at least for the majority of the cruise period, is desirable to provide enough daylight to efficiently complete sampling. Extending somewhat into May would be less detrimental in year 1 than for the more extensive sampling per site in year 2. |
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Earliest Start Date: |
1/15/2019 |
Multi-Ship Op: |
No |
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Latest Start Date: |
4/15/2019 |
Other Ship(s): |
Multi-ship not requested. |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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24 |
0 |
0 |
0 |
24 |
Repeating Cruise?
(within same year) |
Yes |
Interval: |
1 year |
# of Cruises: |
2 |
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Description of Repeating cruise requirements: |
As described in the proposal, the second year sampling will be more intensive but at fewer sites than the first year. Sites for year 2 to be chosen based on analyses of year 1 results. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
We request that the cruises be scheduled between February and April in each year, although beginning sometime in January would be acceptable if a ship is available to support the work. No early than January or February is desirable to minimize the chances that sea ice will prevent access to sites, particularly the more southerly ones, and particularly if it is a heavy sea ice year. No later than April, at least for the majority of the cruise period, is desirable to provide enough daylight to efficiently complete sampling. Extending somewhat into May would be less detrimental in year 1 than for the more extensive sampling per site in year 2. |
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Short Description of Op Area
for use in schedules: |
West Ant Pen |
| Description of Op Area: |
Western Antarctic Peninsula between Anvers Island and Marguerite Bay |
| Op Area Size/Dia.: |
300 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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Ending
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
n/a |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Rada Punta Arenas, Chile |
None |
Rada Punta Arenas, Chile |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Charles D. Amsler, UAB |
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# in Science Party |
8 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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3 |
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Explanation of Science Party Requirements and Technician Requirements |
At least two MTs and one MST as standard on the vessel. |
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 Dynamic Positioning | ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
 SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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