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	Author	Howard, J.L.; Perez, A.; Lopes, C.C.; Fourqurean, J.W.
	Title	Fertilization Changes Seagrass Community Structure but not Blue Carbon Storage: Results from a 30-Year Field Experiment			Type	Journal Article
	Year	2016	Publication	Estuaries and Coasts	Abbreviated Journal	Estuaries and Coasts
	Volume	39	Issue	5	Pages	1422-1434
	Keywords	Seagrass; Organic matter; Sediment; Blue carbon
	Abstract	Seagrass ecosystems are attracting attention as potentially important tools for carbon (C) sequestration, comparable to those terrestrial and aquatic ecosystems already incorporated into climate change mitigation frameworks. Despite the relatively low C stocks in living biomass, the soil organic carbon pools beneath seagrass meadows can be substantial. We tested the relationship between soil C storage and seagrass community biomass, productivity, and species composition by revisiting meadows experimentally altered by 30 years of consistent nutrient fertilization provided by roosting birds. While the benthos beneath experimental perches has maintained dense, Halodule wrightii-dominated communities compared to the sparse Thalassia testudinum-dominated communities at control sites, there were no significant differences in soil organic carbon stocks in the top 15 cm. Although there were differences in delta C-13 of the dominant seagrass species at control and treatment sites, there was no difference in soil delta C-13 between treatments. Averages for soil organic carbon content (2.57 +/- 0.08 %) and delta C-13 (-12.0 +/- 0.3 aEuro degrees) were comparable to global averages for seagrass ecosystems; however, our findings question the relevance of local-scale seagrass species composition or density to soil organic carbon pools in some environmental contexts.
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	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1559-2723	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	FCI @ refbase @			Serial	1158
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