5. Conclusions
Significant seasonal biological responses to physical processes were
observed in the central YS (Fig. 9). During winter, nutrient-rich water
was observed coincidently with the occurrence of the YSWC (Fig. 4).
Prasinophytes were abundant and the main contributors of Chl b in
the YSWC water. The mechanism/process of the spring bloom was
very complex and unique. However, the YSWC was suggested to be
one of the important players. A very strong spatial heterogeneity was
observed in the physical, chemical and biological parameters in the
central YS during the YSCWM occurrence (Figs. 2, 7 and Table 2). A
low Chl a biomass (0.2 mg m−3) and a low contribution of diatoms to
the total Chl a biomass (30%), with a high contribution of cyanobacteria
(36%), were observed in the central YS in August when the YSCWM
prevailed, and a high contribution of chrysophytes (38%) was observed
in October when it was decaying. All these results were considered as
the characteristic physical–chemical–biological response of the ecosystem
in the central YS.
5. ConclusionsSignificant seasonal biological responses to physical processes wereobserved in the central YS (Fig. 9). During winter, nutrient-rich waterwas observed coincidently with the occurrence of the YSWC (Fig. 4).Prasinophytes were abundant and the main contributors of Chl b inthe YSWC water. The mechanism/process of the spring bloom wasvery complex and unique. However, the YSWC was suggested to beone of the important players. A very strong spatial heterogeneity wasobserved in the physical, chemical and biological parameters in thecentral YS during the YSCWM occurrence (Figs. 2, 7 and Table 2). Alow Chl a biomass (0.2 mg m−3) and a low contribution of diatoms tothe total Chl a biomass (30%), with a high contribution of cyanobacteria(36%), were observed in the central YS in August when the YSCWMprevailed, and a high contribution of chrysophytes (38%) was observedin October when it was decaying. All these results were considered asthe characteristic physical–chemical–biological response of the ecosystemin the central YS.
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