Seasonal changes of phytoplankton in Luan Estuary-Dapu Estuary in spring and summer
ZHANG Yue-ming1, WANG Yu-liang1, YANG Yang1, HAN Xiao-qing2, ZHANG Jian-da1, GAO Wei-ming1
1. Key Laboratory of Hebei Province for Environmental Change and Ecological Construction, College of Resource and Environmental Sciences, Hebei Normal University, Shijiazhuang 050024, China;
2. Land and Resource Using and Planning Institute of Hebei Province, Shijiazhuang 050056, China
Abstract：On the basis of phytoplankton and environmental ecological investigation in Luan Estuary-Dapu Estuary in spring and summer. There are 3 phylum 15 families 44 species of phytoplankton were identified, diatoms was the most and accounted for 85%.Species number in summer was significantly higher than that in spring. The obvious seasonal succession was found based on the Jaccard with 0.14.There were 3 dominant species in total, Noctiluca scientillans、Rhizosolenia alata was the dominant species in spring, Skeletonema costatum was that in summer. Because of dominant species was simply and dominance was high,the community structure was instability. The number of phytoplankton ranged from 1.14×104/m3 to 827.73×104/m3 with the descending order from offshore areas to pelagic sea and The rangeability was summer greater than spring. The average number of the summer was 7 times than spring. The Shannon-Wiener's index H', Margalef's richness index dMa and Pielou's evenness index J all reflect that Summer habitat conditions better than the spring, Luan Estuary better than Dapu Estuary. No significant relationship between phytoplankton and single environmental factor in spring .temperature was the major limit factor for the number of species and cells number in summer and salinity was major acted on species number,little correlation with cells number,what's more,DIP was the main limit factor for cells number but little correlation with species number.
ZHANG Yue-ming,WANG Yu-liang,YANG Yang et al. Seasonal changes of phytoplankton in Luan Estuary-Dapu Estuary in spring and summer[J]. Marine Environmental Science, 2015, 34(1): 70-75.
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