發(fā)布時間：2018-01-11 19:27

  本文關(guān)鍵詞：東、黃海表層懸浮顆粒物中類脂生物標(biāo)志物的時空變化及其影響因素　出處：《中國海洋大學(xué)》2015年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 東、黃海 表層懸浮顆粒物 浮游植物 類脂生物標(biāo)志物 時空分布

【摘要】：東、黃海是重要的陸架邊緣海之一,其生態(tài)環(huán)境變化記載了海洋環(huán)境和人類活動的變遷。類脂生物標(biāo)志物已經(jīng)成功應(yīng)用于東、黃海浮游植物及其群落結(jié)構(gòu)的重建中,但類脂生物標(biāo)志物對浮游植物的指示作用及其影響因素仍缺少浮游植物現(xiàn)代過程的充分驗證。表層懸浮顆粒物是了解海洋浮游植物現(xiàn)代過程和類脂生物標(biāo)志物之間關(guān)系的重要載體,本文通過對東、黃海2011年-2012年四個季節(jié)表層懸浮顆粒物中菜籽甾醇、甲藻甾醇和長鏈烯酮的測定,了解三種類脂生物標(biāo)志物的時空變化。同時,結(jié)合物理化學(xué)相關(guān)參數(shù)進(jìn)行PCA分析,探討影響類脂生物標(biāo)志物時空變化的主要因素,驗證類脂生物標(biāo)志物對浮游植物及其群落結(jié)構(gòu)的指示作用,為使用類脂生物標(biāo)志物重建東、黃海浮游植物及其群落結(jié)構(gòu)提供現(xiàn)代依據(jù)。研究結(jié)果表明：春季,菜籽甾醇和甲藻甾醇高值出現(xiàn)在南黃海的中北部,長鏈烯酮含量較低,在81個站位中只有7個站位有檢出。夏季,菜籽甾醇和甲藻甾醇的高值分布在長江口附近,長鏈烯酮的高值分布在南黃海西北部和中部。秋季,菜籽甾醇和甲藻甾醇高值位于南黃海海州灣附近、山東半島南岸和長江口外東南部海域(即P斷面),長鏈烯酮高值位于南黃海的東南部。冬季,菜籽甾醇和甲藻甾醇的高值分布在蘇北淺灘和長江口外東南部海域(即P斷面),長鏈烯酮的高值分布在東海的東南部海域。菜籽甾醇、甲藻甾醇和長鏈烯酮濃度總和(∑PB)的平均值存在明顯的季節(jié)變化：夏季是最高,其次為秋季和春季,冬季最低。春、夏、秋、冬四個季節(jié),菜子甾醇在三種類脂生物標(biāo)志物中濃度最高。春季和夏季,菜籽甾醇/甲藻甾醇(B/D)出現(xiàn)在浮游植物生產(chǎn)力較高的海域。春季,B/D的高值與溶解無機氮/磷酸鹽(DIN/P)的低值對應(yīng)；秋季,B/D值與硅酸鹽/溶解無機氮(Si/DIN)和DIN/P有關(guān)；夏季,B/D值與磷酸鹽(P)限制有關(guān),B/D值的分布主要受控于硅藻、甲藻對不同營養(yǎng)條件的競爭。本研究中類脂生物標(biāo)志物的時空變化與色素等現(xiàn)場調(diào)查結(jié)果和遙感數(shù)據(jù)類似,進(jìn)一步驗證了類脂生物標(biāo)志物對浮游植物及其群落結(jié)構(gòu)的指示作用。控制類脂生物標(biāo)志物時空變化的因素具有明顯的區(qū)域特征和季節(jié)變化。夏季主要控制因素是長江沖淡水?dāng)y帶的營養(yǎng)鹽；春季和秋季,主要控制因素是濁度；冬季整體較低的類脂生物標(biāo)志物濃度主要受控于較低的溫度和弱光照條件,但沉積物的再懸浮和黑潮次表層水?dāng)y帶的營養(yǎng)鹽分別對冬季蘇北淺灘和東海東南部海域(P斷面)類脂生物標(biāo)志物的影響不可忽視。
[Abstract]:East, Huang Hai is one of the important continental shelf marginal seas, its ecological environment changes recorded the changes of the marine environment and human activities. Lipoid biomarkers have been successfully used in the east. Huang Hai phytoplankton and its community structure reconstruction. However, the indicative effect of lipoid biomarkers on phytoplankton and its influencing factors are still lack of sufficient verification of modern phytoplankton process. Surface suspended particulate matter is one of the most important biomarkers to understand the modern process of marine phytoplankton and lipoid biomarkers. The important carrier of the relationship. Based on the determination of rapeseed sterol, pyrophytosterol and long chain ketene in surface suspended particulates of four seasons from 2011 to 2012, the temporal and spatial changes of three kinds of lipid biomarkers were studied. The main factors influencing the space-time variation of lipoid biomarkers were discussed by PCA analysis with physicochemical parameters, and the indication of lipoid biomarkers to phytoplankton and its community structure was verified. Huang Hai phytoplankton and its community structure can be reconstructed by using lipoid biomarkers. The results showed that the high values of rapeseed sterol and pyrophytosterol appeared in the central and northern part of South Huang Hai in spring. The content of long chain ketene was relatively low, only 7 out of 81 stations were detected. In summer, the high values of rapeseed sterols and pyrenosterols were distributed near the Changjiang Estuary. In autumn, the high values of rapeseed sterol and pyrophytosterol were located in the sea area (section P) near the southern #internal_person1# Bay, the southern coast of Shandong Peninsula and the southeast of the Yangtze River Estuary. The high value of long chain ketene is located in the southeast of south Huang Hai. In winter, the high values of rapeseed sterol and pyrenosterol are distributed in the shoal of northern Jiangsu and the southeast sea area outside the Changjiang Estuary (P section). The high value of long chain ketene is distributed in the southeast sea of the East China Sea. The mean values of total concentration of rapeseed sterol, dinosterol and long chain ketene (鈭，

本文編號：1410908