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

Preliminary and in progressVersion 1 (2024-01-10)Dataset Type:Other Field ResultsDataset Type:experimental

Principal Investigator: Justin Campbell (Smithsonian Institution)

BCO-DMO Data Manager: Sawyer Newman (Woods Hole Oceanographic Institution)


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


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 ...

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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)


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