海洋学报(中文版)
海洋學報(中文版)
해양학보(중문판)
ACTA OCEANOLOGICA SINICA
2015年
4期
83-93
,共11页
尹希杰%孙治雷%徐勇航%李云海%邵长伟
尹希傑%孫治雷%徐勇航%李雲海%邵長偉
윤희걸%손치뢰%서용항%리운해%소장위
硫酸盐还原速率%硫酸根(SO2-4 )%甲烷厌氧氧化%九龙江河口
硫痠鹽還原速率%硫痠根(SO2-4 )%甲烷厭氧氧化%九龍江河口
류산염환원속솔%류산근(SO2-4 )%갑완염양양화%구룡강하구
sulfate reduction rate%sulfate%anaerobic methane oxidation%Jiulong River Estuary
在2011年7月利用35 SO2-4培养示踪法测定九龙江河口两个站位(A 站位位于咸淡混合区,盐度3~5;B 站位位于海相区,盐度20~25)沉积柱中硫酸盐还原速率的垂直分布。结果显示 A 站位沉积柱中硫酸盐还原速率变化范围为54~2345 nmol/(cm3·d),从表层到底部先增大后减小,最大值出现在20 cm 深度附近;B 站位硫酸盐还原速率在24~987 nmol/(cm3·d)之间,分别在10 cm 和78 cm深度附近出现两个峰值,分别为876和987 nmol/(cm3·d)。综合分析两个站位孔隙水中 SO2-4、甲烷浓度和沉积物中总有机碳、温度和氧化还原电位的垂直变化趋势与其硫酸盐还原速率的分布规律,表明 A 站位沉积物中硫酸盐还原以有机矿化为主;B 站位受到有机质矿化和甲烷厌氧氧化的共同作用;两个站位硫酸盐还原速率及垂直分布趋势受孔隙水中 SO2-4浓度、有机质活性和温度的共同影响;根据各个层位硫酸盐还原速率估算两个站位硫酸盐还原通量(以硫计)分别为527.9和357.1 mmol/(m2·d),表明硫酸盐还原是九龙江河口有机质厌氧矿化的重要路径。
在2011年7月利用35 SO2-4培養示蹤法測定九龍江河口兩箇站位(A 站位位于鹹淡混閤區,鹽度3~5;B 站位位于海相區,鹽度20~25)沉積柱中硫痠鹽還原速率的垂直分佈。結果顯示 A 站位沉積柱中硫痠鹽還原速率變化範圍為54~2345 nmol/(cm3·d),從錶層到底部先增大後減小,最大值齣現在20 cm 深度附近;B 站位硫痠鹽還原速率在24~987 nmol/(cm3·d)之間,分彆在10 cm 和78 cm深度附近齣現兩箇峰值,分彆為876和987 nmol/(cm3·d)。綜閤分析兩箇站位孔隙水中 SO2-4、甲烷濃度和沉積物中總有機碳、溫度和氧化還原電位的垂直變化趨勢與其硫痠鹽還原速率的分佈規律,錶明 A 站位沉積物中硫痠鹽還原以有機礦化為主;B 站位受到有機質礦化和甲烷厭氧氧化的共同作用;兩箇站位硫痠鹽還原速率及垂直分佈趨勢受孔隙水中 SO2-4濃度、有機質活性和溫度的共同影響;根據各箇層位硫痠鹽還原速率估算兩箇站位硫痠鹽還原通量(以硫計)分彆為527.9和357.1 mmol/(m2·d),錶明硫痠鹽還原是九龍江河口有機質厭氧礦化的重要路徑。
재2011년7월이용35 SO2-4배양시종법측정구룡강하구량개참위(A 참위위우함담혼합구,염도3~5;B 참위위우해상구,염도20~25)침적주중류산염환원속솔적수직분포。결과현시 A 참위침적주중류산염환원속솔변화범위위54~2345 nmol/(cm3·d),종표층도저부선증대후감소,최대치출현재20 cm 심도부근;B 참위류산염환원속솔재24~987 nmol/(cm3·d)지간,분별재10 cm 화78 cm심도부근출현량개봉치,분별위876화987 nmol/(cm3·d)。종합분석량개참위공극수중 SO2-4、갑완농도화침적물중총유궤탄、온도화양화환원전위적수직변화추세여기류산염환원속솔적분포규률,표명 A 참위침적물중류산염환원이유궤광화위주;B 참위수도유궤질광화화갑완염양양화적공동작용;량개참위류산염환원속솔급수직분포추세수공극수중 SO2-4농도、유궤질활성화온도적공동영향;근거각개층위류산염환원속솔고산량개참위류산염환원통량(이류계)분별위527.9화357.1 mmol/(m2·d),표명류산염환원시구룡강하구유궤질염양광화적중요로경。
Sulfate reduction rates were measured experimentally with 35 SO2-4 in sediment of A and B cores in coastal of Jiulong River Estuary in July of 2011.A and B cores were situated in the upper estuarine coast and seaward boundary respectively,with low salinity (3-5)and high salinity (20-25).Sulfate reduction rates volume-based values ranged from 54 to 2 345 nmol/(cm3 ·d)in vertical profile of A core,and the highest sulfate reduction rates occurred at 20 cm depth.Sulfate reduction rates varied from 24 to 987 nmol/(cm3 ·d)in B core,two peaks in sul-fate reduction rates profiles obviously appeared on the top 10 cm and at 78cm depth,with significantly high value of 876 nmol/(cm3 ·d)and 987 nmol/(cm3 ·d),respectively.Based on trends on the vertical profile of SO2-4 ,meth-ane concentration in pore water and total organic carbon,temperature and oxidation reduction potential in sediments of two cores,sulfate reduction is mainly dominated by organic mineralization in A Core,however sulfate reduction is controlled by the combination of organic matter mineralization and anaerobic methane oxidation in B Core.Mean-while sulfate reduction rates and the vertical distribution trends of it were affected by the availability of active or-ganic matter,temperature and SO2-4 concentration in the pore water in two cores.The depth-integrated sulfate re-duction rates were 527.9 mmol/(m2 ·d)and 357.1 mmol/(m2 ·d)within sulfate reduction zone in A Core and B Core respectively.Sulfate reduction is one of the major processes contributing to the mineralization of organic mat-ter in this estuary.