Effects of Phosphate on the Growth of Alexandrium Tamarense at Different Initial Nitrate Concentrations in Laboratory Cultures

Wen, Shaoqing; Song, Lili; Long, Hong; Zhao, Dongzhi

doi:10.1007/978-3-642-23753-9_92

Cited by 1 publication

(1 citation statement)

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“…Primary production, which represents phytoplankton biomass and growth rates (Wang et al, ), is sensitive to environmental change (Wu, He, et al, ). It is mainly regulated by various factors that include incident irradiance (Lewis, ; Wang et al, ), ice cover (Lewis, ), nonalgal light attenuation (Deng et al, ; Wu, Lai, Zhang, Cai, & Chen, ), mixing depth (Wu et al, ), temperature (Liang et al, ), and the nutrient supply (Browning et al, ; Dou, Tang, Yang, & Wang, ; Hagstrom & Levin, ; Ke, Tan, Ma, Huang, & Wang, ; Li, Ge, Wang, Zhou, & Hu, ; Liu et al, ; Wang et al, ; Wilkerson, Dugdale, Parker, Blaser, & Pimenta, ; Yin, Liu, & Harrison, ), especially for nutrient inputs that have a significant effect on phytoplankton growth and development as well as the biogeochemical cycles of watersheds (Browning et al, ; Li et al, ; Moore et al, ; Wen et al, ). In addition, nutrient inputs, particularly nitrogen (N) and phosphorus (P), to freshwater ecosystems have continued to increase due to progressively increasing anthropogenic activities resulting from rising populations, broadening economic development, and the greater demand for food and energy production in recent years (Cao, Wang, Liao, Sun, & Huang, ; Wilkerson et al, ).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of phytoplankton community and water net primary productivity response to the nutrient status of the Poyang Lake and Gan River, China

et al. 2019

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Phytoplankton community characteristics and associative primary productivity, which reflect the ecological and nutritional status of water, are sensitive to environmental change. Particularly, nutrient inputs have a significant effect on phytoplankton growth and development as well as the biogeochemical cycle of watersheds. We investigated the phytoplankton community and nutrient status downstream from the Gan River into Poyang Lake. On a catchment scale, the phytoplankton communities and associative primary productivity from these two water bodies differed. The Poyang Lake phytoplankton community is composed of seven phyla of algae, whereas the Gan River is composed of six, the dominant phyla of phytoplankton being Bacillariophyta and Cryptophyta in Poyang Lake and Gan River, respectively. Phytoplankton abundance and primary productivity were significantly higher in Poyang Lake. Lower nitrogen (N) and phosphorous (P) concentrations and higher carbon (C) and silicon (Si) concentrations significantly affected the phytoplankton communities and primary productivity distribution in the entire Poyang Lake Basin. In this regard, we found a significant correlation between the phytoplankton community of the Gan River and P and N, whereas N and Si primarily regulated the phytoplankton community structure of Poyang Lake. Moreover, we found a significant correlation between DTN, Si/P, DIC/P, and primary productivity in the Gan River, whereas NH4+ jointly controlled primary productivity in Poyang Lake. Furthermore, the Margalef Richness Index (0.84–2.41) can be indicative of the environmental water quality status; and we determined that the most area of Poyang Lake and Gan River both were P restriction and moderately polluted, whereas the entrance of the Gan River into Poyang Lake was seriously polluted, which confirms that the Gan River is a main and crucial source of Poyang Lake pollution. Nanjishan Nature Reserve was already slightly eutrophic due to the high nutrient content and a large number of algae in the south‐east of Poyang Lake, but the Gan River had good river fluidity, so some areas of the Gan River were oligotrophic.

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