CAJ | 학술논문

在对江西洪湖沉积柱的粒度、营养元素分析的基础上，揭示了沉积物营养元素的剖面变化特征；同时基于210Pb CRS计年模式，结合富集系数（EF）分析，探讨了近150年来人类活动对湖区生态环境变化的影响.研究结果表明沉积物平均沉积速率为0.407 g/（cm2·a），总有机碳（TOC）、总氮（TN）、总磷（TP）呈现出明显的四阶段沉积特征：1862年~1949年，TN、TOC及TP处于相对稳定的状态，EF（TN）、EF（TP）、EF（TOC）值均小于1，表明此阶段人类活动对环境干扰较小，湖区整体生态环境较为稳定；1949~1978年，TN、TOC及TP处于迅速增加的阶段，垂向含量变化幅度增大，EF（TN）、EF（TP）值接近1.5，逐渐超出自然水平范围内，这说明受人为因素增加，湖泊营养元素含量增加，属人类活动影响的初期阶段；1978年~1997年，营养盐含量持续增加，C/N值继续降低，并在后期保持稳定.湖泊初级生产力提高，富营养化现象开始显现，湖泊受到污染；1997年~2011年，营养盐含量高并具有明显波动性，EF（TN）、EF（TP）值高于1.5，突破了自然水平富集的阈限值，说明人类活动是影响湖泊环境的主要因素，湖泊富营养化问题加剧.
재대강서홍호침적주적립도、영양원소분석적기출상，게시료침적물영양원소적부면변화특정；동시기우210Pb CRS계년모식，결합부집계수（EF）분석，탐토료근150년래인류활동대호구생태배경변화적영향.연구결과표명침적물평균침적속솔위0.407 g/（cm2·a），총유궤탄（TOC）、총담（TN）、총린（TP）정현출명현적사계단침적특정：1862년~1949년，TN、TOC급TP처우상대은정적상태，EF（TN）、EF（TP）、EF（TOC）치균소우1，표명차계단인류활동대배경간우교소，호구정체생태배경교위은정；1949~1978년，TN、TOC급TP처우신속증가적계단，수향함량변화폭도증대，EF（TN）、EF（TP）치접근1.5，축점초출자연수평범위내，저설명수인위인소증가，호박영양원소함량증가，속인류활동영향적초기계단；1978년~1997년，영양염함량지속증가，C/N치계속강저，병재후기보지은정.호박초급생산력제고，부영양화현상개시현현，호박수도오염；1997년~2011년，영양염함량고병구유명현파동성，EF（TN）、EF（TP）치고우1.5，돌파료자연수평부집적역한치，설명인류활동시영향호박배경적주요인소，호박부영양화문제가극.
The paper discusses the distribution of nutrient elements in the sediment core and the causes that people had influenced on eco-environment changes of lake during the modern period based on the parameters of sediment rate,sedi?ment grain size,nutrient enrichment concentration(TN,TP and TOC)and enrichment factor(EF). The result showed that the concentrations of nutrient elements increased along the sediment cores from the bottom to the top. According to the 210Pbex CRS model,we estimated the average sediment rate 0.407 g/(cm2·a). a and compared the different nutrient el?ements content,and analyzed eco-environment effect that the people activities might cause. From 1862 to 1949,the con?tent of TOC、TN and TP is relative lower and it illustrated that there were less human activities that influenced the eco-environment change. From 1949 to 1978,TOC、TN and TP contents increased significantly,and the higher EF exhibited the nutrient elements vertical variation of amplitude became enlarged. In this period,the increase of human activities such as deforestation resulted in the higher nutrient element content. From 1978 to 1997,the increasing of sediment nu?trient and the promotion of the primary productivity showed the lake eutrophication began to emerge,and it was human activities such as livestock pollution that had become the main factors influencing the lake eco-environment change. From 1997 to 2011,the contents of nutrient kept higher value and the EF>1.5 showed that lake eutrophication aggravat?ed,and the human activities was the main factor that aggravated the eco-environment problem.