海洋学报(中文版)
海洋學報(中文版)
해양학보(중문판)
ACTA OCEANOLOGICA SINICA
2014年
2期
40-50
,共11页
蔡德陵%孙耀%张小勇%苏远峰%吴永华%陈志华%杨茜
蔡德陵%孫耀%張小勇%囌遠峰%吳永華%陳誌華%楊茜
채덕릉%손요%장소용%소원봉%오영화%진지화%양천
有机碳%碳同位素%初级生产力%东海%黄海
有機碳%碳同位素%初級生產力%東海%黃海
유궤탄%탄동위소%초급생산력%동해%황해
organic carbon%carbon stable isotopes%primary productivity%East China Sea%Yellow Sea
从20世纪80年代以来古生产力的重建研究一直是国内外海洋生态学研究的热点,但已有的大多数研究是在深海区;而陆架区的特点是来自陆源物质的影响往往比较明显,因此,研究难度远较深海区大。利用现代沉积物中的有机碳稳定同位素组成来估算海源碳的含量,在此基础上,结合调查区域表层沉积物中的几个初级生产力的代表性指标(浮游植物总量、叶绿素a浓度以及硅藻含量)的调查资料,寻求岩心中海源碳与古生产力指标的相关关系,再由南黄海冷涡沉积区3个典型柱状沉积物中海源碳重建了200 a以来高分辨率的古生产力记录,这对陆架海生态环境演变规律的研究有重要意义。对重建所得到的南黄海近代初级生产演化因素的初步探讨表明,近200 a来初级生产力波动升高与海水表层温度的升高趋势是一致的,但其最主要的控制因素还是营养盐的供应,其中陆源营养物质和污染物质的影响起到了重要的作用。
從20世紀80年代以來古生產力的重建研究一直是國內外海洋生態學研究的熱點,但已有的大多數研究是在深海區;而陸架區的特點是來自陸源物質的影響往往比較明顯,因此,研究難度遠較深海區大。利用現代沉積物中的有機碳穩定同位素組成來估算海源碳的含量,在此基礎上,結閤調查區域錶層沉積物中的幾箇初級生產力的代錶性指標(浮遊植物總量、葉綠素a濃度以及硅藻含量)的調查資料,尋求巖心中海源碳與古生產力指標的相關關繫,再由南黃海冷渦沉積區3箇典型柱狀沉積物中海源碳重建瞭200 a以來高分辨率的古生產力記錄,這對陸架海生態環境縯變規律的研究有重要意義。對重建所得到的南黃海近代初級生產縯化因素的初步探討錶明,近200 a來初級生產力波動升高與海水錶層溫度的升高趨勢是一緻的,但其最主要的控製因素還是營養鹽的供應,其中陸源營養物質和汙染物質的影響起到瞭重要的作用。
종20세기80년대이래고생산력적중건연구일직시국내외해양생태학연구적열점,단이유적대다수연구시재심해구;이륙가구적특점시래자륙원물질적영향왕왕비교명현,인차,연구난도원교심해구대。이용현대침적물중적유궤탄은정동위소조성래고산해원탄적함량,재차기출상,결합조사구역표층침적물중적궤개초급생산력적대표성지표(부유식물총량、협록소a농도이급규조함량)적조사자료,심구암심중해원탄여고생산력지표적상관관계,재유남황해랭와침적구3개전형주상침적물중해원탄중건료200 a이래고분변솔적고생산력기록,저대륙가해생태배경연변규률적연구유중요의의。대중건소득도적남황해근대초급생산연화인소적초보탐토표명,근200 a래초급생산력파동승고여해수표층온도적승고추세시일치적,단기최주요적공제인소환시영양염적공응,기중륙원영양물질화오염물질적영향기도료중요적작용。
The reconstruction of paleoproductivity at home and abroad has been a hot spot in the research of marine ecology since the 1980s .However ,most of the studies are in abyssal regions .Continental shelf ar-eas are influenced more obviously by the terrigenous matter and more difficult to be studied than abyssal regions .It makes use of carbon stable isotope compositions in organic matter of modern sediments to esti-mate the sea-derived carbon contents .Based on this ,combining the investigation data of the several repre-sentative indicators of the primary productivity in surface sediments (phytoplankton biomass ,chlorophyll-a concentration ,as well as the diatom content ) ,to seek correlation between the sea-derived carbon content and the productivity index in cores .Then ,the high resolution of the paleoproductivity records over 200 a can be reconstructed from the sea-derived carbon content in 3 typical columnar sediments from the southern Huanghai Sea cold eddy zone .It has important significance for studying the evolution rule of ecological en-vironment in the continental shelf area .Controlling factors on the primary productivity evolution recon-structed for the southern Yellow Sea are discussed elementarily ,it show s that the primary productivity wave elevation over 200 a is consistent with sea surface temperature trends ,but its main control factor still is nutrient supply ,in w hich land nutrients and pollutants play an important role .