李蒙^1,4,5,,
类彦立^1,3,4,5,,,
李铁刚^2,3,,,
董帅帅^1,5
1. 中国科学院海洋研究所海洋生物分类与系统演化实验室, 山东 青岛 266071
2. 自然资源部第一海洋研究所, 海洋沉积与环境地质国家海洋局重点实验室, 山东 青岛 266061
3. 青岛海洋科学与技术试点国家实验室, 山东 青岛 266237
4. 中国科学院大学, 北京 100049
5. 中国科学院海洋大科学中心, 山东 青岛 266071

基金项目: 国家自然科学基金项目（批准号：41976058）、国家自然科学基金委员会－山东省人民政府联合基金重点支持项目（批准号：U1906211）、国家重点基础研究发展计划项目（批准号：2017YFC1405100）、山东省“泰山****”建设工程专项经费项目（批准号：TSQN20182117）和科学号高级用户项目（批准号：KEXUE2018G27）共同资助


详细信息

作者简介: 李蒙, 男, 29岁, 博士研究生, 海洋生物学专业, E-mail:limeng314@mails.ucas.ac.cn

通讯作者: 类彦立, E-mail:leiyanli@qdio.ac.cn; 李铁刚, E-mail:tgli@fio.org.cn

中图分类号: P722.5;Q915.811⁺.1

收稿日期:2020-01-16
修回日期:2020-03-28
刊出日期:2020-05-30

Seasonal variations of the foraminiferal community composition and test morphology in a Qingdao intertidal zone in 2017~2018

Li Meng^1,4,5,,
Lei Yanli^1,3,4,5,,,
Li Tiegang^2,3,,,
Dong Shuaishuai^1,5
1. Laboratory of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong
2. Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, Shandong
3. Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, Shandong
4. University of Chinese Academy of Sciences, Beijing 100049
5. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, Shandong


More Information

Corresponding authors: Lei Yanli,E-mail:leiyanli@qdio.ac.cn ; Li Tiegang,E-mail:tgli@fio.org.cn

MSC: P722.5;Q915.811⁺.1

--> Received Date: 16 January 2020
Revised Date: 28 March 2020
Publish Date: 30 May 2020


摘要
摘要:2017年1月至2018年1月期间对青岛湾潮间带表层1 cm沉积物中的底栖有孔虫进行了连续13个月的调查，获得16属36种共14939个有孔虫样本。通过对活体和总体群落参数、物种组成、壳体大小与畸形的生物统计分析，发现以上参数均具有明显的季节变化特征。结果表明，该区域有孔虫活体群落与总体群落相似性高，以本地属种为主，优势种主要为Quinqueloculina seminula、Ammonia aomoriensis、Cribrononion gnythosuturatum和Ammonia beccarii。相较于2010年至2012年期间的调查结果，该区域有孔虫丰度升高、多样性降低，群落参数的变化趋势和物种组成发生了较为明显的变化：在群落参数方面，2010年至2012年期间有孔虫丰度和多样性均在冬季时最高，2017至2018年期间有孔虫丰度在春季和秋季时高、复合分异度则在夏季和冬季时高；在物种组成方面，2017年时Ammonia aomoriensis仍然保持着较高的含量，但Quinqueloculina seminula和Cribrononion gnythosuturatum的丰度和比例均有明显升高。这些变化与2017年间更高的温度和更低的盐度有关。底栖有孔虫优势种含量与壳体形态呈现明显的季节性变化，且不同优势种之间存在明显差异，表现为：A.aomoriensis最高丰度和最大壳体出现在2017年4月，春季和冬季时含量高、冬季时畸形率低，推测其更喜好中低温环境；Q.seminula最高丰度和最大壳体出现在2017年5月，夏季时含量高、畸形率低，推测其更耐受高温环境。本研究结果预示应用潮间带有孔虫群落重建古环境时，有孔虫丰度、种类组成、壳体形态都存在明显的季节性因素，需综合考虑长时间尺度下属种组成与环境变化之间的关系。
关键词: 底栖有孔虫/
季节变化/
潮间带/
物种组成/
壳体形态

Abstract:The relationship between foraminifera and environmental changes was the base of its use in paleoenvironmental reconstruction. Long-term investigation was an important way to obtain these relationships. Qingdao intertidal zone was located in the west of the Yellow Sea, PR China which with an obvious seasonal environmental variation. The sediment in east part of this area were gravel, silt-sand, and sand respectively from shore to sea. Early study which undertook from 2010 to 2012 pointed the seasonal changes occurred in abundance, diversity and species composition of benthic foraminifera in this flat. This study was aimed to explore the relationship between the seasonal and long-term foraminiferal variations and environment changes in this region.
In this study, benthic foraminifera from the surface 1 cm sediments in the silt-sand of Qingdao intertidal zone(36.06°N, 120.33°E) was investigated monthly(one sampling each month)from January 2017 to January 2018. Three samples were collected for each sampling and 39 samples were obtained. Samples of sediments were fixed with 95% ethanol with 1 g/L rose-Bengal immediately for distinguish the living and dead foraminifera. Temperature(for air, sea water, and surface sediment)and salinity(for sea water)were measured simultaneously. A total of 14939 foraminiferal specimens(7986 living specimens and 6953 dead specimens)belong to 36 species of 16 genera were obtained and analyzed respectively.
The results showed that the foraminiferal abundance, diversity, species composition and test morphology of the intertidal foraminifera in Qingdao bay showed obvious seasonal changes. Benthic foraminifera from live and total assemblages showed similar species composition and seasonal changes. Therefore, most of foraminifera in this area were local species(dominant by Quinqueloculina seminula, Ammonia aomoriensis, Cribrononion gnythosuturatum and Ammonia beccarii)which means that the seasonal and long-term changes in foraminiferal abundance, diversity, species composition, test size and test abnormality reflect local environmental variations. Compared with the results of investigation from 2010 to 2012, the community parameters and species composition of benthic foraminifera in Qingdao Bay have changed significantly. In the aspect of community parameters, foraminifera abundance was higher in spring and autumn, while the Shannon-wiener index and evenness index were higher in summer and winter. And for species composition, the content of A.aomoriensis remained high as before, while the abundance and proportion of Q.seminula and C. gnythosuturatum increased significantly. These changes were presumed to be related to the higher temperature from February to September 2017 and lower salinity in the whole year of 2017 compared with environment in the same region in 2012. The seasonal changes of the content and test abnormality of dominant species were different from each other. The highest abundant and maximum test size in April 2017, the higher content in spring, and the lower abnormal ratio in winter showed the preference of A.aomoriensis for medium and low temperature. The highest abundant and maximum test size in May 2017, the higher content and lower abnormal ratio in summer showed the tolerance of Q.seminula for high temperature. These results suggested that there were obvious seasonal changes in the abundance, species composition, and shell morphology of foraminifera, and the relationship between the changes of foraminiferal species composition and environment from long-term investigation should be considered when reconstructing paleoenvironments with the intertidal foraminifera community.
Key words:benthicforaminifera/
seasonal variation/
intertidal zone/
species composition/
test morphology



PDF全文下载地址:

http://www.dsjyj.com.cn/data/article/export-pdf?id=dsjyj_11783