顆粒態(tài)陸源有機(jī)物在長(zhǎng)江口及其鄰近海域的分布和遷移
發(fā)布時(shí)間：2019-06-03 19:34
【摘要】：本文利用顆粒態(tài)木質(zhì)素作為生物標(biāo)志物,結(jié)合粒度、葉綠素a(Chl-a)、顆粒態(tài)有機(jī)碳(OC%)、碳穩(wěn)定同位素(δ13C)等參數(shù)對(duì)顆粒態(tài)陸源有機(jī)物在2012年長(zhǎng)江大洪水、長(zhǎng)江口和東海陸架區(qū)水體中的分布規(guī)律和遷移特征進(jìn)行示蹤研究。所測(cè)樣品為：2012年7月長(zhǎng)江大洪水時(shí)期表-底層懸浮顆粒物樣品；2011年8月至2013年7月徐六涇每月定點(diǎn)觀測(cè)所采集的表層懸浮顆粒物樣品；2011年5月、7月和8月三個(gè)不同航次的長(zhǎng)江口及東海陸架區(qū)懸浮顆粒物樣品；2012年7月長(zhǎng)江口航次表層懸浮顆粒物樣品：2013年8月長(zhǎng)江口及東海陸架區(qū)懸浮顆粒物樣品。所有樣品都進(jìn)行了有機(jī)碳(OC%)、碳穩(wěn)定同位素(δ13C)分析,以及顆粒態(tài)木質(zhì)素的測(cè)定,部分航次樣品進(jìn)行了粒度以及葉綠素a(Chl-a)的測(cè)定。 結(jié)果表明：2012年7月長(zhǎng)江大洪水期顆粒態(tài)有機(jī)物的來(lái)源和組成具有一定的時(shí)空分布特征。在來(lái)源上,干流上游顆粒物中的OC%含量較低,A8(顆粒態(tài)木質(zhì)素中香草基酚類、紫丁香基酚類和肉桂基酚類相對(duì)于總有機(jī)碳的含量)值較高,顆粒態(tài)有機(jī)物主要來(lái)自于上游土壤和C3植物碎屑；中下游的顆粒態(tài)有機(jī)物主要來(lái)自于中下游土壤和浮游植物的現(xiàn)場(chǎng)生產(chǎn)；支流兩湖一江地區(qū),較高的OC%值和較低的A8值表明,浮游植物的現(xiàn)場(chǎng)生產(chǎn)是顆粒態(tài)有機(jī)物的主要來(lái)源。在組成上,大洪水期的顆粒態(tài)有機(jī)物樣品相比較于正常年份和特枯年份,其(Ad/Al)v(木質(zhì)素香草基酚類中的酸單體與醛單體含量的比值)值較高,表明經(jīng)歷了高度的降解過(guò)程。而在表-底層之間,由于長(zhǎng)江洪水期特大的徑流作用,使得表-底層之間被充分混合,在來(lái)源、組成和含量上沒(méi)有明顯差異。 夏季長(zhǎng)江口及其鄰近海域顆粒態(tài)有機(jī)物的分布受到鹽度、總懸浮顆粒物(TSM)濃度以及最大渾濁帶的影響。隨著鹽度增大,顆粒態(tài)陸源有機(jī)物相對(duì)于海源顆粒態(tài)有機(jī)物的貢獻(xiàn)量逐漸下降�？倯腋☆w粒物濃度的下降,降低了水體的濁度,提高了浮游生物的現(xiàn)場(chǎng)生產(chǎn),海源顆粒態(tài)有機(jī)物的相對(duì)貢獻(xiàn)量增加。顆粒態(tài)木質(zhì)素在向海輸送過(guò)程中會(huì)受到礦物組分、生物降解、浮游生物現(xiàn)場(chǎng)生產(chǎn)等各種因素的作用,使其組成成分和性質(zhì)發(fā)生改變。最大渾濁帶的底部再懸浮,局部改變了顆粒態(tài)陸源有機(jī)物向海輸送過(guò)程中的信號(hào)。 東海陸架區(qū)水體中顆粒態(tài)木質(zhì)素的含量在不同季節(jié)有不同的分布特征。夏季長(zhǎng)江徑流量大,顆粒態(tài)木質(zhì)素含量高,維管束植物來(lái)源中有來(lái)自于被子植物的木本部分；春季長(zhǎng)江徑流量小,顆粒態(tài)木質(zhì)素含量低,維管束植物來(lái)源主要來(lái)自于被子植物的草本部分,表明長(zhǎng)江徑流量大小是控制顆粒態(tài)陸源有機(jī)物在東海陸架區(qū)水體中分布的主控因素。河口區(qū)作為陸海相互作用的交界地帶,也是顆粒態(tài)陸源有機(jī)物向海輸送過(guò)程中的必經(jīng)地區(qū)。顆粒態(tài)陸源有機(jī)物在經(jīng)過(guò)該區(qū)域后,木質(zhì)素含量迅速下降,組成特征(P/(V+S)、DHBA、S/V、(Ad/Al)v, Pn/P)也都發(fā)生了改變,表明河口區(qū)對(duì)顆粒態(tài)陸源有機(jī)物在向海輸送過(guò)程中具有一定的改造作用。利用Lig6示蹤顆粒態(tài)陸源有機(jī)物沿著長(zhǎng)江沖淡水方向的遷移結(jié)果表明,長(zhǎng)江沖淡水對(duì)顆粒態(tài)陸源有機(jī)物的最遠(yuǎn)輸送距離可以達(dá)到距長(zhǎng)江口約300km處。
[Abstract]:In this paper, the grain-state lignin is used as a biological marker, and the parameters such as the particle size, the chlorophyll a (Chl-a), the particulate organic carbon (OC%) and the carbon-stable isotope (FIG. 13C) are used for the large flood in the Yangtze River in 2012, The distribution and migration characteristics of the water in the Yangtze River estuary and the East China Sea shelf area are studied. The measured samples are: the July 2012 flood period of the Yangtze River, the bottom-layer suspended particulate matter sample, and the surface layer suspended particulate matter collected by the fixed-point observation from August 2011 to July 2013; Suspended particulate matter samples of the Yangtze and East China Sea shelf areas in May, July and August 2011; samples of surface-surface suspended particulate matter of the Changjiang Estuary in July,2012: sample of suspended particulate matter in the Changjiang Estuary and the East China Sea shelf area in August,2013. All samples were subjected to organic carbon (OC%), carbon stable isotope (13C) analysis, as well as the determination of particulate lignin, the particle size of some of the air samples and the determination of chlorophyll a (Chl-a). The results show that the source and composition of the particulate matter in the large flood period of the Yangtze River in July 2012 have a certain time-space distribution. The content of OC% in the upstream particulate matter of the main stream is lower, and A8 (the content of the vanilla-based phenols, the syringyl phenols and the cinnamyl phenols in the granular lignin with respect to the total organic carbon) is higher, and the particulate organic matter mainly comes from the upstream soil and the C3 plant. The granular organic matter in the middle and lower reaches of the middle and lower reaches mainly comes from the on-site production of the soil and the phytoplankton in the middle and lower reaches of the middle and lower reaches; the higher OC% value and the lower A8 value in the two-lake and one-river area of the tributaries indicate that the on-site production of the phytoplankton is the main source of the particulate organic matter The ratio of the content of the acid monomer to the aldehyde monomer in the (Ad/ Al) v (the content of the acid monomer and the aldehyde monomer in the lignin-based phenol) of the (Ad/ Al) v (the content of the acid monomer and the aldehyde monomer in the lignin-based phenol) is higher than that of the normal year and the special dry year, indicating that a high degree of degradation is experienced, Cheng. And between the table and the bottom layer, due to the large runoff effect in the flood period of the Yangtze River, the water is fully mixed between the table and the bottom layer, and there is no significant difference in the source, composition and content. The distribution of particulate matter in the Changjiang estuary and its adjacent sea area is affected by salinity, total suspended particulate matter (TSM) concentration and maximum turbidity zone. The influence of the particle-state land-source organic matter relative to the organic matter in the sea-source granular state increases with the increase of the salinity. the concentration of the total suspended particulate matter is reduced, the turbidity of the water body is reduced, the on-site production of the plankton is improved, the relative contribution of the sea-source granular organic matters is improved, The particle-state lignin can be influenced by various factors such as mineral component, biodegradation, and on-site production of plankton in the process of conveying to the sea, so that the composition and the property of the particle-state lignin Raw change. The bottom of the largest turbid zone is re-suspended, and the particle-state land-source organic matter is locally changed into the sea transport process The content of the particulate lignin in the body of the East China Sea shelf is different in different seasons. The runoff of the Yangtze River is large, the content of the granular lignin is high, and the plant source of the vascular bundle is from the woody part of the angiosperm; the runoff of the Yangtze River is small, the content of the granular lignin is low, and the plant source of the vascular bundle mainly comes from the angiosperm The herb part of the Yangtze River shows that the size of the runoff of the Yangtze River is to control the distribution of the granular land-source organic matter in the water in the continental shelf area of the East China Sea. The main control factor is that the estuary area is the boundary zone of the land-sea interaction, and is also the particle-state land-source organic matter to the sea transportation process After passing through the area, the lignin content of the granular land-source organic matter decreased rapidly, and the composition characteristics (P/ (V + S), DHBA, S/ V, (Ad/ Al) v, and Pn/ P) also changed. The results of the transfer of the organic matter in the water of the Yangtze River to the fresh water of the Yangtze River show that the most distant transport distance of the fresh water from the Yangtze River to the particle-state land-source organic matter can reach about 3 of the Yangtze River estuary.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：X55;X52
本文編號(hào)：2492165
[Abstract]:In this paper, the grain-state lignin is used as a biological marker, and the parameters such as the particle size, the chlorophyll a (Chl-a), the particulate organic carbon (OC%) and the carbon-stable isotope (FIG. 13C) are used for the large flood in the Yangtze River in 2012, The distribution and migration characteristics of the water in the Yangtze River estuary and the East China Sea shelf area are studied. The measured samples are: the July 2012 flood period of the Yangtze River, the bottom-layer suspended particulate matter sample, and the surface layer suspended particulate matter collected by the fixed-point observation from August 2011 to July 2013; Suspended particulate matter samples of the Yangtze and East China Sea shelf areas in May, July and August 2011; samples of surface-surface suspended particulate matter of the Changjiang Estuary in July,2012: sample of suspended particulate matter in the Changjiang Estuary and the East China Sea shelf area in August,2013. All samples were subjected to organic carbon (OC%), carbon stable isotope (13C) analysis, as well as the determination of particulate lignin, the particle size of some of the air samples and the determination of chlorophyll a (Chl-a). The results show that the source and composition of the particulate matter in the large flood period of the Yangtze River in July 2012 have a certain time-space distribution. The content of OC% in the upstream particulate matter of the main stream is lower, and A8 (the content of the vanilla-based phenols, the syringyl phenols and the cinnamyl phenols in the granular lignin with respect to the total organic carbon) is higher, and the particulate organic matter mainly comes from the upstream soil and the C3 plant. The granular organic matter in the middle and lower reaches of the middle and lower reaches mainly comes from the on-site production of the soil and the phytoplankton in the middle and lower reaches of the middle and lower reaches; the higher OC% value and the lower A8 value in the two-lake and one-river area of the tributaries indicate that the on-site production of the phytoplankton is the main source of the particulate organic matter The ratio of the content of the acid monomer to the aldehyde monomer in the (Ad/ Al) v (the content of the acid monomer and the aldehyde monomer in the lignin-based phenol) of the (Ad/ Al) v (the content of the acid monomer and the aldehyde monomer in the lignin-based phenol) is higher than that of the normal year and the special dry year, indicating that a high degree of degradation is experienced, Cheng. And between the table and the bottom layer, due to the large runoff effect in the flood period of the Yangtze River, the water is fully mixed between the table and the bottom layer, and there is no significant difference in the source, composition and content. The distribution of particulate matter in the Changjiang estuary and its adjacent sea area is affected by salinity, total suspended particulate matter (TSM) concentration and maximum turbidity zone. The influence of the particle-state land-source organic matter relative to the organic matter in the sea-source granular state increases with the increase of the salinity. the concentration of the total suspended particulate matter is reduced, the turbidity of the water body is reduced, the on-site production of the plankton is improved, the relative contribution of the sea-source granular organic matters is improved, The particle-state lignin can be influenced by various factors such as mineral component, biodegradation, and on-site production of plankton in the process of conveying to the sea, so that the composition and the property of the particle-state lignin Raw change. The bottom of the largest turbid zone is re-suspended, and the particle-state land-source organic matter is locally changed into the sea transport process The content of the particulate lignin in the body of the East China Sea shelf is different in different seasons. The runoff of the Yangtze River is large, the content of the granular lignin is high, and the plant source of the vascular bundle is from the woody part of the angiosperm; the runoff of the Yangtze River is small, the content of the granular lignin is low, and the plant source of the vascular bundle mainly comes from the angiosperm The herb part of the Yangtze River shows that the size of the runoff of the Yangtze River is to control the distribution of the granular land-source organic matter in the water in the continental shelf area of the East China Sea. The main control factor is that the estuary area is the boundary zone of the land-sea interaction, and is also the particle-state land-source organic matter to the sea transportation process After passing through the area, the lignin content of the granular land-source organic matter decreased rapidly, and the composition characteristics (P/ (V + S), DHBA, S/ V, (Ad/ Al) v, and Pn/ P) also changed. The results of the transfer of the organic matter in the water of the Yangtze River to the fresh water of the Yangtze River show that the most distant transport distance of the fresh water from the Yangtze River to the particle-state land-source organic matter can reach about 3 of the Yangtze River estuary.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：X55;X52
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