Navicula sp.

In another study with rooted macrophytes, Navicula sp. and Elodea canadensis rapidly accumulated lead from solutions containing 1.0 mg Pb+2/L, i.e., 70 mg Pb/kg dry weight per minute the process was overwhelmingly passive (Everard and Denny 1985). Depuration was rapid 90% of the lead sorbed during the first hour by shoots of Elodea was released within 14 days after transfer to clean water, though 10% seemed to be irreversibly bound (Everard and Denny 1985). 

Figure 5. SEM images of (A) diatoms (Navicula sp.) on outer wood surface, collected upstream of Manaus on the Rio Negro and (B) the outer wood surface covered by a textureless, siliceous gel. Arrows indicate remnant frustule and siliceous gel.

Chaetoceros calcitrans Chaetoceros muelleri Thalassiosira pseudonana Navicula jeffreyae Nitzschia closterium Skeletonema costatum Isochrysis sp. (T.ISO) Pavlova lutheri Rhodomonas salina Tetraselmis suecica Micromonas pusilla Dunaliella tertiolecta Nannochloropsis oculata Heterocapsa niei... 

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