海洋学报（中文版）
海洋學報（中文版）
해양학보（중문판）
ACTA OCEANOLOGICA SINICA
2013年
4期
155-161
,共7页
冯旭文%段杉杉%石学法%刘升发%赵美训%杨海丽%朱德弟%王奎
馮旭文%段杉杉%石學法%劉升髮%趙美訓%楊海麗%硃德弟%王奎
풍욱문%단삼삼%석학법%류승발%조미훈%양해려%주덕제%왕규
浙江沿岸泥质区%富营养化和缺氧%生物标志物%浮游植物生产力
浙江沿岸泥質區%富營養化和缺氧%生物標誌物%浮遊植物生產力
절강연안니질구%부영양화화결양%생물표지물%부유식물생산력
Zhejiang coastal mud area%eutrophication and hypoxia%phytoplankton productivity
在210 Pb定年的基础上，对取自浙江沿岸泥质缺氧区的柱样沉积物开展了菜子甾醇、甲藻甾醇、长链烯酮等生物标志化合物分析，根据生物标志化合物含量及比例的分布特征，重建了泥质区110年来浮游植物生产力及群落结构变化。结果表明浙江近岸浮游植物生产力百年来呈上升趋势，自20世纪60年代开始上升，80年代以来有显著增加，浮游植物群落结构则均有甲藻比例上升、硅藻比例下降的趋势。研究认为，浙江沿岸泥质区百年来浮游植物生产力的提高与我国化肥施用量和长江氮的入海通量呈正相关，营养盐N∶P和N∶Si比值的增加导致浮游植物优势种由硅藻向甲藻的转变，说明自20世纪60年代，尤其是自20世纪80年代以来工农业快速发展、大型水利工程建设等人类活动是导致浙江沿岸泥质区海域浮游植物生产力提高及群落结构变化的主要因素。
在210 Pb定年的基礎上，對取自浙江沿岸泥質缺氧區的柱樣沉積物開展瞭菜子甾醇、甲藻甾醇、長鏈烯酮等生物標誌化閤物分析，根據生物標誌化閤物含量及比例的分佈特徵，重建瞭泥質區110年來浮遊植物生產力及群落結構變化。結果錶明浙江近岸浮遊植物生產力百年來呈上升趨勢，自20世紀60年代開始上升，80年代以來有顯著增加，浮遊植物群落結構則均有甲藻比例上升、硅藻比例下降的趨勢。研究認為，浙江沿岸泥質區百年來浮遊植物生產力的提高與我國化肥施用量和長江氮的入海通量呈正相關，營養鹽N∶P和N∶Si比值的增加導緻浮遊植物優勢種由硅藻嚮甲藻的轉變，說明自20世紀60年代，尤其是自20世紀80年代以來工農業快速髮展、大型水利工程建設等人類活動是導緻浙江沿岸泥質區海域浮遊植物生產力提高及群落結構變化的主要因素。
재210 Pb정년적기출상，대취자절강연안니질결양구적주양침적물개전료채자치순、갑조치순、장련희동등생물표지화합물분석，근거생물표지화합물함량급비례적분포특정，중건료니질구110년래부유식물생산력급군락결구변화。결과표명절강근안부유식물생산력백년래정상승추세，자20세기60년대개시상승，80년대이래유현저증가，부유식물군락결구칙균유갑조비례상승、규조비례하강적추세。연구인위，절강연안니질구백년래부유식물생산력적제고여아국화비시용량화장강담적입해통량정정상관，영양염N∶P화N∶Si비치적증가도치부유식물우세충유규조향갑조적전변，설명자20세기60년대，우기시자20세기80년대이래공농업쾌속발전、대형수리공정건설등인류활동시도치절강연안니질구해역부유식물생산력제고급군락결구변화적주요인소。
A high resolution sediment core was selected in the Zhejiang coastal mud area ,which was also located within the hypoxia area. The biomarkers ,such as brassicasterol ,dinosterol and C37-Alkenone were determined on the 210 Pb-dated sediment core. According to the vertical distribution of the biomarkers and ratios in the core sedi-ments ,we reconstructed the changes in phytoplankton productivity and community structure over the last 110 years in the Zhejiang coastal region. The results indicated increased phytoplankton productivity during the last 100 years in the mud area. Phytoplankton productivity increased gradually starting in the 1960s and accelerated after the 1980s. The change of phytoplankton community structure showed an increasing relative contribution of dino-flagellates and a decreasing relative contribution of diatoms over the last 100 years. The increase in phytoplankton productivity in the Zhejiang coastal mud area corresponded to the increased use of fertilizer and nitrogen fluxes from the Changjiang River during the last 50 years. Meanwhile the succession of diatoms to dinoflagellates was probably caused by the increasing trends in N ∶P and N∶Si ratios. We suggested that these variations were mainly caused by the increasing anthropogenic activities such as the industrialization ,agricultural development and the construc-tion of dams since the 1960s and especially since the 1980s.
