The effects of tropical cyclones on seasonal variations in phytoplankton biomass were studied at a station on the northern coast of Taiwan. Water temperature at the study site vaned between 17 and 30° in 1994 Both chlorophyll a concentration and Synechococcus abundance were low in the winter and started to increase when surface water became warmer than 25OC In July and August, 4 cyclones struck the study site All cyclones dramatically reduced phytoplankton biomass in the water column, and caused significant increases in nitrate, nitrite, phosphate, and silicate concentrations Blooms of phytoplankton with total chlorophyll a concentration as high as 4.2 pg 1 ' were observed after cyclonic disturbances, and were mainly composed of species greater than 5 W I I in size Our results sugqest that cyclones disturb coastal marine ecosystems in a consistent way, and induce ordered and predictable changes in a phytoplankton community.
The concurrent usage of chelator and biostimulator demonstrated satisfactory of pytoattenuation through several of planting and harvesting by using energy plant sunflower and vetiver. EDTA increased the soil metal mobility and further plant uptake while the stimulator GA 3 and IAA was in the descending sequence. Biostimulator has been demonstrated e plant growth enhancement and been employed for agricultural operation after. 3 cycles of planting and harvesting Cu levels had demonstrated gradually metal decreasing. The control, stimulator GA 3 and IAA, and stimulator remaining copper levers were, Soil copper contents were, for initial, 1 st , 2 nd , and 3 rd session, respectively. The soil metal level reduction achieved an acceptable level. More rounds of planting and harvesting, the soil metal concentration expected to be more effective in on-site operation. Sunflower can be employed to mitigate soil metal contamination through concurrent use of chelator and biostimulator. Citation: Yeh TY, Li KY, Chung CC (2012) EDTA and Plant Growth Regulators (GA 3 and IAA) by Energy Plant to Evaluate Phytoattenuation. Biochem
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