| Abstract: | We report the concentration, phosphorus (P) and nitrogen (N) content, and size and chemical fractionation of fine suspended particles (0.2-100 ??m) and colloids (3 kilodalton [kDa]-0.1 ??m) in the surface water of Everglades wetlands along regional and P-enrichment gradients. Total suspended sediment concentrations ranged from 0.7 to 2.7 mg L-1. Total particulate P concentrations increased from 0.05 ??mol L-1 to 0.31 ??mol L -1 along the P-enrichment gradient. Particles contained from 20% to 43% of total P but <12% of total N in surface water. Dissolved (<0.2 ??m) organic N contained about 90% of total N, with the 3-100-kDa colloidal size class containing the most N of any size class. The 0.45-2.7-??m size fraction held the most particulate P at all sites, whereas particulate N was most abundant in the 2.7-10-??m size class at most sites. Standard chemical fractionation of particles identified acid-hydrolyzable P as the most abundant species of particulate P, with little reactive or refractory organic P. Sequential chemical extraction revealed that about 65% of total particulate P was microbial, while about 25% was associated with humic and fulvic organic matter. The size and chemical fractionation information suggested that P-rich particles mostly consisted of suspended bacteria. Suspended particles in Everglades wetlands were small in size and had low concentrations, yet they stored a large proportion of surface-water P in intermediately reactive forms, but they held little N. ?? 2007, by the American Society of Limnology and Oceanography, Inc. |
| Genre: | Article |
| ProdID: | 70029881 |
| Citation Author: | Noe, G. B.; Harvey, J. W.; Saiers, J. E. |
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| Citation End Page: | 1178 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Limnology and Oceanography |
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| Citation Number Of Pages: | 13 |
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| Citation Search Results Text: | Characterization of suspended particles in Everglades wetlands; 2007; Article; Journal; Limnology and Oceanography; Noe, G. B.; Harvey, J. W.; Saiers, J. E. |
| Citation Start Page: | 1166 |
| Citation Volume: | 52 |
| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | Characterization of suspended particles in Everglades wetlands; 2007; Article; Journal; Limnology and Oceanography; Noe, G. B.; Harvey, J. W.; Saiers, J. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.4319/lo.2007.52.3.1166 |
| Date Other: | Mon, 1 Jan 2007 00:00 -0600 |
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