Effect of nutrient enrichment on growth of the eelgrass Zostera marina in the Chesapeake Bay,Virginia, USA |
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Authors: | R J Orth |
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Institution: | (1) Virginia Institute of Marine Science, Gloucester Point, Virginia, USA |
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Abstract: | The addition of two commerical fertilizers, one 5% NH4NO3, 10% P2O5, 10% K2O, and the other 10% NH4NO3, 10% P2O5, 10% K2O, ahd a dramatic effect on the growth of Zostera marina in the Chesapeake Bay. There was a significant increase in the length, biomass and total number of turions of fertilized plots compared with controls during a 2 to 3 month period. Data from this short-term field experiment suggest that Z. marina beds in the Chesapeake Bay are nutrient-limited, that the grwoth form of Z. marina may be related to the sediment nutrient supply, and that Z. marina may competitively exclude Ruppia maritima by light-shading. |
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