Dataset: TEN Seagrass Leaf Productivity

Name: Thalassia testudinum leaf productivity measurements from experimental plots in the Western Atlantic from summer 2018 (Tropicalization Seagrass Beds project)
Published: 2024-01-10
Keywords: seagrass, Productivity, western atlantic, oceans

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Spatial Extent: N:32.2639 E:-64.8307 S:9.35161 W:-97.0348

Subtropical Western Atlantic

Temporal Extent: 2018-08 - 2019-06

Project:

Collaborative Research: The tropicalization of Western Atlantic seagrass beds (Tropicalization Seagrass Beds)

Principal Investigator:

Justin Campbell (Smithsonian Institution, NMNH)

BCO-DMO Data Manager:

Sawyer Newman (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2024-01-10

Restricted:

Validated:

Current State:

Preliminary and in progress

Thalassia testudinum leaf productivity measurements from experimental plots in the Western Atlantic from summer 2018 (Tropicalization Seagrass Beds project)

Abstract:

This dataset includes seagrass leaf productivity (Thalassia testudinum) from 650 experimental plots distributed across 13 sites in the Western Atlantic. Productivity was collected at two timepoints, once at the end of the 2018 summer growing season, and again at the end of the 2019 winter season. Leaf productivity was calculated as an average of 4-6 harvested seagrass shoots in each experimental plot. Shoots were marked at the base with a needle and allowed to grow, in situ, for 7-10 days. Leaf extension was then measured in the lab after leaves were harvested and expressed as grams of new growth / shoot / day. Sites include: Bocas del Toro, Panama; Bonaire; Little Cayman, Cayman Islands; Carrie Bow, Belize; Puerto Morelos, Mexico; Andros, Bahamas; Eleuthera, Bahamas; Corpus Christi, Texas; Galveston, Texas; Naples, Florida; Crystal River, Florida; St. Joes, Florida; and Bermuda.

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Methods & Sampling

Sampling details

50 small seagrass plots (0.25m2, all comprised of one species, Thalassia testudinum) were established at 13 shallow sites in the Western Atlantic. Each plot was assigned to one of ten treatments comprising a factorial manipulation of caging, nutrient supply, and canopy clipping: (1) control (2) partial cage (3) full cage (4) added nutrients (5) added nutrients + partial cage (6) added nutrients + full cage (7) full cage + half canopy clip (8) full cage + full canopy clip (9) full cage + added nutrients + half canopy clip (10) full cage + added nutrients + full canopy clip. Seagrass shoot density was measured at two time periods (once at the end of summer 2018 and again at the end of winter 2019). During each sampling shoot density was measured twice at haphazard (non-overlapping) locations within each plot from replicate 15cm PVC rings. The dataset displays the total sum of shoot counts.

Site location details

ANDR: Andros, Bahamas (24°53'54.3" N, 77°54'25.2" W)

BERM: Bailey's Bay, Bermuda (32°15'49.9" N, 64°49'50.5" W)

BOCA: Bocas Del Toro, Panama (9°21'05.8" N, 82°15'27.8" W)

BONA: Lac Bay, Bonaire (12°06'44.3" N, 68°13'42.0" W)

CARR: Carrie Bow Cay, Belize (16°49'24.8" N, 88°06'16.2" W)

CAYM: Little Cayman, Cayman Islands (19°40'14.6" N, 80°03'21.3" W)

CORP: Corpus Christi, TX (27°55'47.9" N, 97°02'05.2" W)

CRYS: Crystal River, FL (28°42'50.4" N, 82°49'08.4" W)

ELEU: Eleuthera, Bahamas (25°27'53.5" N, 76°37'35.8" W)

GALV: Galveston, TX (29°02'41.8" N, 95°10'15.7" W)

JOES: St. Joe's Bay, FL (29°42'05.0" N, 85°19'34.6" W)

NAPL: Naples, FL (26°29'48.6" N, 82°09'40.0" W)

PUER: Puerto Morelos, Mexico (20°52'04.5" N, 86°51'35.4" W)

BCO-DMO Processing

- Removed units from column headers
- Replaced spaces in column header names and replaced them with underscores ("_")
- Converted latitude and longitude values from degrees, minutes, seconds to decimal degrees
- Rounded latitude and longitude fields to 6 degrees of precision
- Rounded absolute_leaf_productivity field to 9 degrees of precision

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1737247

Deployments

None available yet

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
site	Site name or location	unitless	site
latitude	Site latitude in decimal degrees; a positive value indicates a Northern coordinate	decimal degrees	lat
longitude	Site longitude in decimal degrees; a negative value indicates a Western coordinate	decimal degrees	lon
season	Season sample collection took place	unitless	season
plot	Plot ID number	unitless	Site_ID
clipping	Level of seagrass clipping; no = no clipping, partial = half canopy removed, full = full canopy removed	unitless	treatment
nutrients	Level of nutrients; ambient = no added nutrients; enriched = added nutrients	unitless	treatment
cage	Level of cage; no = no cage, partial = partial 4-sided cage, full = full cage	unitless	treatment
absolute_leaf_productivity	Grams of new leaf material produced per shoot per day	grams	growth

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Database

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Dataset: TEN Seagrass Leaf Productivity