威海朝阳港潟湖湿地古生物化石特征及其古环境意义  

Characteristics of Fossils in Weihai Chaoyanggang Lagoonal Wetland and Its Paleoenvironmental Significance

作　　者：谷东起[1] 付军[1] 丰爱平[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2008年第2期222-227,共6页Advances in Marine Science

基　　金：国家自然科学基金项目--潟湖湿地演变过程对人类活动的响应及量化评估(40606013);山东省自然科学基金项目--山东半岛潟湖湿地演变及其对人类活动的响应(Y2006E01);我国近海海洋综合调查与评价专项--滨海湿地退化调查(908-01-03-05-05)

摘　　要：根据孢粉和微体古生物化石特征,分析了朝阳港潟湖中全新世以来的古植被、古气候和古环境演变过程。研究表明,在第1阶段潟湖沿岸森林植被为以栎、松为主的落叶阔叶-针叶混交林,部分样品含有个体小的常绿栎属花粉;潟湖边缘是以海滨盐生的蒿属、禾本科、藜科等草本为主的沼泽湿地景观,反映气候温暖略湿。第2阶段和前一阶段相比,草本植物花粉中喜盐碱的蒿、藜的数量增加,样品中出现较多的海生刺球藻和甲藻,并有贝类等生长,反映该段时间有较长时间的海水侵入。第3阶段针叶的松属占优势,表明气温与前阶段相比略低,高盐度有孔虫的出现可能显示潟湖出现阶段性封闭现象。Based on the characteristics of sporopollens and microfossils from the Chaoyanggang Lagoon, the evolutional processes of paleovegetation, paleoclimate and paleoenvironment since the middle Holocene were analyzed. It is shown from the analysis results that in the first stage, the mixed forest of deciduous broad-leaf trees and conifers vegetated along the coast of the lagoon, and some samples contain evergreen Quercus pollens;the vegetation of marsh in the margin of the lagoon was composed mainly of Artemisia, Gramineae and Chenopodiaceae, which indicates a warm and moist climate. In the second stage, the numbers of pollens of Artemisia and Chenopodiaceae increased compared with those in the first stage, and a lot of marine Hystrchosphera and Pyrrophyte and some shellfishes were found in the samples, which indicates that this area was submerged by seawater for a long period in this stage. In the third stage, the numbers of pollens of conifers （pines） were dominant, indicating that the air temperature was lower than that in the second stage, and the occurrence of high-salinity foraminifera indicates that the lagoon mouth was suffered staggered block in this stage.

关 键 词：朝阳港 潟湖湿地 古生物化石 古环境 

分 类 号：P716.22[天文地球—海洋科学]