Preliminary ecological study of the macrobenthos during summer in Linluobei Bay of Shandong Rongcheng

利用2010年7月在山东荣成临洛北湾所获得大型底栖动物定量分析资料,研究了夏季该海域海带养殖区和邻近水域大型底栖动物在物种组成、生物量、丰度、优势种以及物种多样性等方面的特征和空间差异,并采用MDS和CLUSTER分析了大型底栖动物的群落结构,以期为该地区以后的科学研究提供基础数据。结果表明,本次调查通过采泥和拖网共采集到大型底栖动物88种,其中采泥得到大型底栖动物51种,拖网采得大型底栖动物45种,各站位的物种多样性差异明显,物种数量从2种到21种。与环境因子的相关性分析显示,各站的物种数和丰度与DO存在明显的负相关。在所有大型底栖动物中,甲壳动物26种,多毛类环节动物24种,软体动物23种..

山东荣成临洛北湾夏季大型底栖动物群落生态学初步研究

利用2010年7月在山东荣成临洛北湾所获得大型底栖动物定量分析资料,研究了夏季该海域海带养殖区和邻近水域大型底栖动物在物种组成、生物量、丰度、优势种以及物种多样性等方面的特征和空间差异,并采用MDS和CLUSTER分析了大型底栖动物的群落结构,以期为该地区以后的科学研究提供基础数据。结果表明,本次调查通过采泥和拖网共采集到大型底栖动物88种,其中采泥得到大型底栖动物51种,拖网采得大型底栖动物45种,各站位的物种多样性差异明显,物种数量从2种到21种。与环境因子的相关性分析显示,各站的物种数和丰度与DO存在明显的负相关。在所有大型底栖动物中,甲壳动物26种,多毛类环节动物24种,软体动物23种..

Analysis of the COI sequence characteristics and genetic diversity of Oratosquilla oratoria in the Xiaoqing River Estuary and its adjacent sea

The Xiaoqing River Estuary has been severely polluted due to the quick development of industry and agriculture as well as the rapid increase in the population in the region. Mantis shrimp (Oratosquilla oratoria) is an important fishery resource in this area that is under great threat from overfishing and pollution. In this study, samples were collected in the Xiaoqing River Estuary and its adjacent sea during June-August 2020 to understand the population genetic diversity based on COI gene. A total of 90 haplotypes and 63 polymorphic loci, including 59 transition loci, 1 transversion loci, and 3 loci where both a transition and transversion existed, were defined based on 216 COI gene fragments with a length of 655 bp. The nucleotide diversity and haplotype diversity were 0.970 0 and 0.005 1, respectively. Compared with other sea areas, we found that the genetic diversity of the Xiaoqing River Estuary population was relatively high. Meanwhile, genetic structure analysis showed an obvious difference in the genetic variation of the mantis shrimp population on a large spatial scale, e.g., the Yellow Sea and the Bohai Sea, the East China Sea and the South China Sea. Whereas, it did not show any difference on a relatively smaller spatial scale, e.g., the Yellow Sea and the Bohai Sea. The genetic diversity background of the mantis shrimp population in the Xiaoqing River Estuary and its adjacent sea could provide a theoretical basis for resource management and germplasm bank establishment

Long-term trends of macrobenthos in Changjiang Estuary, China in relation to environmental changes

根据近30年来的长江口大型底栖动物群落的历史资料;以及2009年和2010年的现场调查数据;从长江口底栖动物群落结构变化特征出发;分析了其长期演变的过程和规律;旨在阐明底栖动物群落的演变趋势;识别其重要演变时段。同时结合长江口海域近50～60年来的入海径流量和携沙量变化、营养盐和DO等水质特征变化;分析底栖动物群落的变化原因。分析结果表明;长江口底栖生物群落的变化可大体分为3个阶段;第一阶段是20世纪90年代之前;底栖生物群落无论物种数、生物量都维持相对较高的水平;第二阶段发生在20世纪90年代初至2005年;由于受到气候变化和人类活动的综合影响;底栖生物群落的上述指标都有所降低;表明受到自然和人为因素干扰的加剧;第三阶段是2005年之后至现在;由于长江口水域的各项生态环境保护措施加强;底栖生物群落得到一定程度的恢复。通过对长江口海域各种环境因素的分析表明;底栖生物群落变化受到长江口区域生物因素和非生物因素的共同影响;变化趋势也与环境因素的变化比较吻合

Evaluation of ecological connectivity in the coastal zone of Laizhou Bay-Yellow River Delta based on ecosystem service value

The ecological connectivity in the Laizhou Bay-Yellow River Delta coastal zone was evaluated by using the minimum cumulative resistance ( MCR) and ecological connectivity index ( ECI) methods. The results showed: ( 1) obvious gradient variation in ecological connectivity in the Laizhou Bay-Yellow River Delta, with the coastal beach zone as the centre and decreasing to both sides; (2) a significant overall downward trend of the connectivity index from 2000 to 2015, decreasing by 12.69%. Infrastructure construction, such as urbanization and transportation, has caused agglomeration and expansion of artificial obstacles, aggravating the trend of fragmentation and islanding of the ecological landscape, resulting in the degradation of ecosystem services and decreasing ecological connectivity; ( 3 ) generally low ecological connectivity in the Laizhou Bay-Yellow River Delta, with the areas of extremely low connectivity and low connectivity accounting for the largest proportion while the area of higher connectivity showed a trend toward secondary or lower level connectivity. The transfer and distribution of different levels of ecological connectivity areas reflect the change of ecosystem pattern and material,energy,biology,and information flow in the Laizhou Bay-Yellow River Delta under the dual influence of human activities and natural factors. These results provide relevant scientific reference for ecosystem protection and integrated coastal zone management in Laizhou Bay-Yellow River Delta.</p

Long-term Effects of Penglai 19-3 Oil Spill Event on the Macrobenthic Community Structure in Bohai Se

【目的】研究渤海海域底栖生物群落状况,探明2011年发生的蓬莱19-3平台溢油事故对该海域底栖生物群落结构的长期影响。【方法】根据2014年夏季对渤海海域32个站位底栖生物的采样调查资料,并与历史数据进行比较,分析渤海海域底栖生物的群落结构、物种组成和底质状况。【结果】渤海海域32个站位共鉴定出大型底栖生物191种,其中多毛类环节动物83种,甲壳动物40种,软体动物42种,棘皮动物15种,其它类群动物11种。优势种为凸壳肌蛤(Musculus senhousei)。调查海域大型底栖生物平均丰度为676.88ind/m2,变化范围为15~11 555ind/m2,低于溢油前水平;平均生物量为30..

Food web characteristics of seagrass beds in intertidal of Dongying and Yantai,Shandong Province

为了探明海草床内主要生物类群间的营养关系以及食物网结构,作者于2018年8月分别在东营黄河口潮间带和烟台西海岸潮间带海草床采集大型底栖生物样品,采用δ13C和δ15N稳定同位素方法,对生物样品的碳、氮同位素组成进行了测定和分析。结果表明:东营海草床内生物的δ13C、δ15N值范围分别为–21.99‰至–12.13‰和5.23‰–11.05‰,烟台海草床内生物的δ13C、δ15N值范围分别为–18.11‰至–14.06‰和6.60‰–10.22‰。东营海草床主要生物的营养级范围为2.00–3.85,烟台海草床主要生物的营养级范围为2.00–3.15。根据δ15N值计算所得的营养级图分析可知两区域海草床内初级消费者主要为滤食性双壳类和多毛类,次级消费者为植食性或杂食性甲壳类,肉食性鱼类和腹足类。与近海海域大型底栖生物食物网相比,海草床内底栖生物的营养级均值普遍较低