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MACROPHYTE STANDING CROP AND PRIMARY PRODUCTWITY IN SOME FLORIDA SPRING‐RUNS 1
Author(s) -
Duarte Carlos M.,
Canfield Daniel E.
Publication year - 1990
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1990.tb01426.x
Subject(s) - standing crop , macrophyte , vegetation (pathology) , environmental science , spring (device) , productivity , shading , hydrology (agriculture) , canopy , phosphorus , agronomy , crop , nitrogen , zoology , biomass (ecology) , ecology , chemistry , biology , geology , medicine , mechanical engineering , art , geotechnical engineering , macroeconomics , organic chemistry , pathology , economics , visual arts , engineering
A survey of 31 Florida spring‐runs was conducted to estimate their submerged macrophyte standing crop and primary productivity. The standing crops of submerged vegetation were not significantly (p > 0.05) correlated to either total nitrogen (r = 0) or total phosphorus (r =−0.20) concentrations, but standing crops were significantly (p < 0.01) correlated to the percentage of the spring‐run's water surface shaded by marginal vegetation (r =−0.76). Maximum daily rates of primary productivity were positively correlated with average submerged macrophyte standing crops (r = 0.81; p < 0.001) and inversely correlated with the degree of shading by marginal vegetation (r =− 0.43; p < 0.05).