Ecological provinces of spring phytoplankton in the Yellow Sea:species composition

Phytoplanktonic ecological provinces of the Yellow Sea（31.20°–39.23°N, 121.00°–125.16°E） is derived in terms of species composition and hydrological factors（temperature and salinity）. 173 samples were collected from 40 stations from April 28 to May 18, 2014, and a total of 185 phytoplanktonic algal species belonging to 81 genera of 7phyla were identified by Uterm？hl method. Phytoplankton abundance in surface waters is concentrated in the west coast of Korean Peninsula and Korea Bay, and communities in those areas are mainly composed of diatoms and cyanobacteria with dominant species of Cylindrotheca closterium, Synechocystis pevalekii, Chroomonas acuta,Paralia sulcata, Thalassiosira pacifica and Karenia mikimotoi, etc. The first ten dominant species of the investigation area are analyzed by multidimensional scaling（MDS） and cluster analysis, then the Yellow Sea is divided into five provinces from Province I（P-I） to Province V（P-V）. P-I includes the coastal areas near southern Liaodong Peninsula, with phytoplankton abundance of 35 420×10^3–36 163×10^3 cells/L and an average of 35 791×10~3 cells/L, and 99.84% of biomass is contributed by cyanobacteria. P-II is from Shandong Peninsula to Subei coastal area. Phytoplankton abundance is in a range of 2×10^3–48×10^3 cells/L with an average of 24×10^3cells/L, and 63.69% of biomass is contributed by diatoms. P-III represents the Changjiang（Yangtze River） Diluted Water. Phytoplankton abundance is 10×10^3–37×10^3 cells/L with an average of 24×10^3 cells/L, and 73.14% of biomass is contributed by diatoms. P-IV represents the area affected by the Yellow Sea Warm Current.Phytoplankton abundance ranges from 6×10^3 to 82×10^3 cells/L with an average of 28×10^3 cells/L, and 64.17% of biomass is contributed by diatoms. P-V represents the cold water mass of northern Yellow Sea. Phytoplankton abundance is in a range of 41×10^3–8 912×10^3 cells/L with an average of 1 763×10^3 cells/L, and 89.96% of biomass is contributed by diatoms. Overall, structures of phytoplankton community in spring are quite heterogeneous in different provinces. Canonical correspondence analysis（CCA） result illustrates the relationship between dominant species and environmental factors, and demonstrates that the main environmental factors that affect phytoplankton distribution are nitrate, temperature and salinity.

Position and Role of the Soil and Water Conservation in Building Ecological Province of Anhui

According to the strategic position of ecological environment in building ecological province of Anhui, we discussed the position and role of soil and water conservation in ecological environment construction and ecological province, and put forward development suggestion of soil and water conservation under new situation.

CHINA'S FUJIAN PROVINCE IS LEADING THE WAY IN SUCCESSFUL ECOLOGICAL DEVELOPMENT

From potholed roads,polluted skies and frequent water shortages to a gold medal winner of International Garden City awarded by the United Nations Environment Program and International Federation of Park and Recreation Administration.That’s the total turnaround William Brown has seen in Xiamen City in just 30 years.As a professor at Xiamen University in southeast China’s Fujian Province,Brown said he had witnessed radical eco-

Physicochemical conditions in affecting the distribution of spring phytoplankton community

To better understand the physicochemical conditions in af fecting regional distribution of phytoplankton community, one research cruise was carried out in the Bohai Sea and Yellow Sea during 3 rd and 23 th May, 2010. The phytoplankton community, including Bacillariophyta(105 taxa), Pyrrophyta(54 taxa), Chrysophyta(1 taxon) and Chlorophyta(2 taxa), had been identified and clearly described from six ecological provinces. And, the six ecological provinces were partitioned based on the top twenty dominant species related with notable physicochemical parameters. In general, the regional distributions of phytoplankton ecological provinces were predominantly influenced by the physicochemical properties induced by the variable water masses and circulations. The predominant diatoms in most of water samples showed well adaptability in turbulent and eutrophic conditions. However, several species of dinoflagellates e.g., Protoperidinium conicum, Protoperidinium triestinum, Protoperidinium sp. and Gymnodinium lohmanni preferred warmer, saltier and nutrient-poor environment. Moreover, the dinoflagellates with high frequency in the Yellow Sea might be transported from the Yellow Sea Warm Current. The horizontal distribution of phytoplankton was depicted by diatoms and controlled by phosphate concentration, while the vertical distribution was mainly supported by light and nutrients availability in the subsurface and bottom layers, respectively.

Strategic Ideas of Greenway Construction in Ecological Zhejiang Province

This article grasps the implication of ecology based on thetheory ofgreenway. With the purposeofmaking Zhejiang Provincebecomeanecological province,itpointsoutthattheproblems exist in the greenway construction and makes it clear that the greenway construction is very important. Furthermore, in combination with the linear green open spaces, such as greening passages, touristareas, and administration facilitiesin Zhejiang Province, this article putsforward the strategic ideas of the greenways construction and the strategies, measures to apply the greenways construction.