. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SLP QR CR Figure 1. Analysis of the natural phytoplanktonic communities in the three estuaries of Waquoit Bay. (A) The abundance of diatoms (open bins) and dinoflagellates (grey bins) in Sage Lot Pond (SLP), Qtiashnet River (QR}. and Childs River (CR). (B) The ratio of diatoms to dinoflagellates in the three estuaries examined. (C) The abundance of centric diatoms (open bins) and pennate diatoms (grey bins) in the three estuaries. Bins represent mean values and bars show confidence inten'als calculated from six replicates fo
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SLP QR CR Figure 1. Analysis of the natural phytoplanktonic communities in the three estuaries of Waquoit Bay. (A) The abundance of diatoms (open bins) and dinoflagellates (grey bins) in Sage Lot Pond (SLP), Qtiashnet River (QR}. and Childs River (CR). (B) The ratio of diatoms to dinoflagellates in the three estuaries examined. (C) The abundance of centric diatoms (open bins) and pennate diatoms (grey bins) in the three estuaries. Bins represent mean values and bars show confidence inten'als calculated from six replicates for CR and SLP and from three replicates for QR. Variables were log-transformed to comply with the assumptions of the AN OVA test time elapsed (days) Figure 2. Abundance of diatoms (circles) and dinoflagellates (squares) during the laboratory experiment. Sage Lot Pond phytoplankton in Childs River water (experimental) is represented by solid symbols; Sage Lot Pond phytoplankton in Sage Lot Pond water (control) is represented by open symbols. Symbols represent mean values and bars show confidence inten'a/s calculated from six replicates for experimental tanks and from three replicates for control tanks. Lines depict the spline-smoothed trends. Variables were log-transformed to comply with the assumptions of the ANOVA test employed. there may be some other factors that could account for the increas- ing abundance of diatoms, such as differences in silica and other trace metals among estuaries. Our findings are consistent with the results of previous labora- tory manipulations. Many authors have shown that experimental nitrate enrichment results in phytoplanktonic communities domi- nated by centric diatoms (4, 5, 7). This is attributed to the higher growth rates of diatoms compared to dinoflagellates (5. 6, 7). Therefore, it is possible that diatoms could build up large stocks of biomass faster than dinoflagellates. Changes in the relative abundance of diatoms and dinofla
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
