Dataset: TEN Seagrass Shoot Density

Name: Thalassia testudinum Shoot Density Measurements From Experimental Plots In The Western Atlantic From Summer 2018 and Winter 2019 from from 2018-2019 (Tropicalization Seagrass Beds project)
Published: 2024-01-10
Keywords: seagrass, shoot denisty, 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 Shoot Density Measurements From Experimental Plots In The Western Atlantic From Summer 2018 and Winter 2019 from from 2018-2019 (Tropicalization Seagrass Beds project)

Abstract:

This dataset includes seagrass shoot density (Thalassia testudinum) from 650 experimental plots distributed across 13 sites in the Western Atlantic. Shoot counts were conducted at two timepoints, once at the end of the 2018 summer growing season and again at the end of the 2019 winter season. Within each plot, shoot counts were conducted twice within replicate 15cm PVC rings. The dataset reports the total sum of shoots counted. 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.
- Converted latitude and longitude fields from degrees, minutes, seconds format to decimal degrees.

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 that observation took place; summer = April through October, winter = October through April	unitless	season
plot	Experimental plot ID number (1 - 50)	unitless	Site_ID
clipping	Level of clipping; no = no clipping, partial = half canopy, 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
sht_den	Measured shoot density; number per 353.4 cm2	unitless	density

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Dataset: TEN Seagrass Shoot Density