Paracalanus parvus, Paracalanus crassirostris , and Acartia bifilosa are dominant and widely distributed in the Bohai Sea, and comprise an important part of zooplankton in terms of biomass as well as production rate. ...Paracalanus parvus, Paracalanus crassirostris , and Acartia bifilosa are dominant and widely distributed in the Bohai Sea, and comprise an important part of zooplankton in terms of biomass as well as production rate. In order to understand their seasonal distribution and population dynamics, their stage specific abundance in different months of the year were analyzed based on the never analyzed yet samples collected in 1959. The three species showed clear and remarkable seasonal variation in abundance, which maximized in spring and summer, when they formed high biomass patches or concentrations in the nearshore area. For Paracalanus parvus , two peaks were observed in the annual circle, one in June and the other in September. For Paracalanus crassirostris , one peak occurred in summer and a small one in December. The seasonal pattern of Acartia bifilosa was different in different regions. In Bohai Bay it had a two peak pattern, with the first large peak occurring in May and the second one in October. In Laizhou Bay, a winter peak in December and January could be observed besides the spring one. The number of generations during the reproductive season for the three species was estimated based on the annual cycle in abundance and ambient temperature.展开更多
渤海是中国专属的内陆型半封闭内海。随着沿海经济发展和人类对自然环境作用的日益加剧,海洋生态环境健康度和海洋生物多样性正经受着前所未有的胁迫和影响(Fausch et al.,1990;Ray et al.,1991)。就自然环境演变趋势而言,受全球变化与...渤海是中国专属的内陆型半封闭内海。随着沿海经济发展和人类对自然环境作用的日益加剧,海洋生态环境健康度和海洋生物多样性正经受着前所未有的胁迫和影响(Fausch et al.,1990;Ray et al.,1991)。就自然环境演变趋势而言,受全球变化与入海淡水径流量动态影响,无不制约着河口湾及近海环境的物理。展开更多
文摘Paracalanus parvus, Paracalanus crassirostris , and Acartia bifilosa are dominant and widely distributed in the Bohai Sea, and comprise an important part of zooplankton in terms of biomass as well as production rate. In order to understand their seasonal distribution and population dynamics, their stage specific abundance in different months of the year were analyzed based on the never analyzed yet samples collected in 1959. The three species showed clear and remarkable seasonal variation in abundance, which maximized in spring and summer, when they formed high biomass patches or concentrations in the nearshore area. For Paracalanus parvus , two peaks were observed in the annual circle, one in June and the other in September. For Paracalanus crassirostris , one peak occurred in summer and a small one in December. The seasonal pattern of Acartia bifilosa was different in different regions. In Bohai Bay it had a two peak pattern, with the first large peak occurring in May and the second one in October. In Laizhou Bay, a winter peak in December and January could be observed besides the spring one. The number of generations during the reproductive season for the three species was estimated based on the annual cycle in abundance and ambient temperature.
文摘渤海是中国专属的内陆型半封闭内海。随着沿海经济发展和人类对自然环境作用的日益加剧,海洋生态环境健康度和海洋生物多样性正经受着前所未有的胁迫和影响(Fausch et al.,1990;Ray et al.,1991)。就自然环境演变趋势而言,受全球变化与入海淡水径流量动态影响,无不制约着河口湾及近海环境的物理。
