Effects of Hydrogen Sulfide (H2S) on Z. marina seedlings, seed germination and shoot density from 2013-01-16 to 2015-09-11 (NCEI Accession 0156588)

Metadata Updated: June 25, 2021

Multiple experiments were conducted to determine the effects hydrogen sulfide had on seedlings and seed germination in the seagrass Zostera marina. One study identified lethal limits of H2S for Z. marina seedlings, as well as identified ranges in which Z. marina seedlings are unaffected by sulfide levels. It was determined that Z. marina seedlings’ growth rates are stunted by H2S levels. Another study identified if anoxia, salinity, sulfide, time the seeds were picked or location the seeds were picked from affected seed germination rates or acted as germination cues. Germination rates for each treatment at each measurement were calculated by dividing the number of germinated seeds by the number of total seeds in each vial at each timepoint. A third seed study identified the best storage conditions for Z. marina seeds to maximize seed viability and germination rates, as well as identified possible germination cues for Z. marina seeds. Various seed storage conditions included fridge storage vs sea table storage, storage in mud vs sandy sediment vs seawater, light vs dark conditions and anoxic vs oxygenated seawater. The objectives of a fourth experiment were to census the density of Z. marina shoots along a transect in Padilla bay. By manipulating sediment conditions among some of the plots, we measured how organic matter in sediment is converted to sulfide and how that sulfide affects eelgrass shoot density. To do so blocks of agar and 100g of sucrose were prepared and each treatment plot received half of an agar block, placed beneath the sediment, every two weeks. Control plots had the sediment manipulated in the same way but without adding organic matter under the sediment. At each two week interval, pore water was sipped and measured for salinity, pH, and total sulfide content at each plot, the sediment temperature of each plot was taken, and the number of vegetative and flowering shoots at each plot was recorded.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date 2020-06-15T22:19:24Z
Metadata Created Date December 4, 2020
Metadata Updated Date June 25, 2021
Reference Date(s) October 20, 2016 (publication)
Frequency Of Update asNeeded

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Additional Metadata

Resource Type Dataset
Metadata Date 2020-06-15T22:19:24Z
Metadata Created Date December 4, 2020
Metadata Updated Date June 25, 2021
Reference Date(s) October 20, 2016 (publication)
Responsible Party (Point of Contact)
Contact Email
Guid gov.noaa.nodc:0156588
Access Constraints Cite as: Adamczyk, Michael; Monreal, Victoria; Tran, Tyler; Yang, Sylvia; Papacjik, Phillip; Blatt, Ari; Woodrich, Dan; Mayer, Miles; Ades, Kate; Ciesielski, Melissa; Tripp, Laura; Simpson, Alexandra; Shull, David (2016). Effects of Hydrogen Sulfide (H2S) on Z. marina seedlings, seed germination and shoot density from 2013-01-16 to 2015-09-11 (NCEI Accession 0156588). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0156588. Accessed [date]., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long -122.48
Bbox North Lat 48.5
Bbox South Lat 46.62
Bbox West Long -124.04
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Preview graphic
Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0156588
Graphic Preview Type PNG
Licence accessLevel: Public
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-124.04, 46.62], [-122.48, 46.62], [-122.48, 48.5], [-124.04, 48.5], [-124.04, 46.62]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2013-01-16
Temporal Extent End 2015-09-11

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