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黄国强,刘旭佳,彭银辉,黄亮华,钟声平,刘丽婷.广西北海市南岸滩涂主要大型植物及表层沉积物的稳定性碳和氮同位素丰度[J].广西科学,2020,27(5):570-577. [点击复制]
- HUANG Guoqiang,LIU Xujia,PENG Yinhui,HUANG Lianghua,ZHONG Shengping,LIU Liting.The Abundance of Carbon and Nitrogen Stable Isotope of the Important Plant and Sediment in Inter-tidal Zone of the South Coast of Beihai,Guangxi[J].Guangxi Sciences,2020,27(5):570-577. [点击复制]
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| 广西北海市南岸滩涂主要大型植物及表层沉积物的稳定性碳和氮同位素丰度 |
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黄国强1, 刘旭佳2, 彭银辉3, 黄亮华1, 钟声平1, 刘丽婷3
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| (1.广西中医药大学海洋药物研究院, 广西南宁 530200;2.广西科学院, 广西北部湾海洋研究中心, 广西近海海洋环境科学重点实验室, 广西南宁 530007;3.北部湾大学海洋学院, 广西北部湾海洋生物多样性养护重点实验室, 广西钦州 535011) |
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| 摘要: |
| 为调查广西北海市南岸滩涂主要大型植物和表层沉积物的稳定性碳和氮同位素丰度，并为沿海滩涂动物食物与营养来源研究提供数据，采用野外现场采样和室内样品处理检测结合的方法，对山口镇英罗村、北暮盐场、营盘镇青山头村、竹林盐场、大冠沙等5个地点采集到的红树落叶（秋茄Kandelia candel和白骨壤Avicennia marina）、互花米草Spartina alterniflora、条浒苔Enteromorpha clathrata、细基江蓠Gracilaria tenuistipitata及表层沉积物样品进行处理，测定总有机碳（TOC）、总氮（TN）、稳定性碳同位素丰度（δ13C）和稳定性氮同位素丰度（δ15N），并进行统计分析与比较。结果显示，山口镇英罗村和大冠沙红树落叶的δ13C和δ15N均没有显著差异，北暮盐场和营盘镇青山头村互花米草的δ13C和δ15N也没有显著差异。5个地点表层沉积物的TOC、TN、δ13C、δ15N均没有显著差异，表明北海市南岸滩涂表层沉积物的TOC、TN、δ13C、δ15N分布较为均匀。沿海滩涂高等植物的δ13C主要受均匀的大气影响，不同区域和地点间差异较小，因此不同地点高等植物红树和互花米草的δ13C变幅也较小。本次调查的北海南岸沿岸较为开阔，并且没有大型河流注入，因此滩涂沉积物中δ15N差异较小。由于植物对氮同位素吸收没有分馏作用，本次调查中不同地点的红树和互花米草δ15N差异也很小。山口镇英罗村、北暮盐场、竹林盐场和大冠沙的条浒苔δ13C没有显著差异，但δ15N有显著差异，竹林盐场的条浒苔δ15N显著低于北暮盐场。北暮盐场和营盘镇青山头村的细基江蓠δ13C没有显著差异，竹林盐场的细基江蓠δ13C显著低于另外两个地点；3个地点的δ15N均没有显著差异。不同地点大型海藻的δ13C或δ15N差异出现的原因有待进一步研究。本研究结果为分析北海南岸大型植物和沉积物对滩涂饵料和营养来源的影响提供了参考数据。 |
| 关键词: 北海市南岸 滩涂 植物 沉积物 碳稳定性同位素 氮稳定性同位素 |
| DOI：10.13656/j.cnki.gxkx.20201214.005 |
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| 基金项目:国家自然科学基金项目（31160532），广西自然科学基金项目（2017GXNSFAA198022）和广西重点研发计划项目（桂科AB16380105）资助。 |
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| The Abundance of Carbon and Nitrogen Stable Isotope of the Important Plant and Sediment in Inter-tidal Zone of the South Coast of Beihai,Guangxi |
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HUANG Guoqiang1, LIU Xujia2, PENG Yinhui3, HUANG Lianghua1, ZHONG Shengping1, LIU Liting3
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| (1.Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning, Guangxi, 530200, China;2.Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;3.Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Ocean College, Beibu Gulf University, Qinzhou, Guangxi, 535011, China) |
| Abstract: |
| In order to investigate the abundance of carbon and nitrogen stable isotope of the important plant and sediment in inter-tidal zone of the south coast of Beihai,Guangxi,and to provide data for the study the food and nutrition sources of the animals inhabited in inter-tidal zone,the research adopted a combination methods of field sampling and indoor treating and measuring of samples.The samples of mangrove leaves (Kandelia candel and Avicennia marina),Spartina alterniflora,Enteromorpha clathrata,Gracilaria tenuistipitata, and sediments collected from five sites of Yingluo Village of Shankou Town,Saltern of Beimu,Qingshantou Village of Yingpan Town,Saltern of Zhulin,and Daguansha were processed to measure the contents of total organic carbon (TOC,%),total nitrogen (TN,%),abundance of stable isotope of carbon δ13C,‰),and abundance of stable isotope of nitrogen (δ15N,‰),and the statistical analysis and comparison were performed.The results showed that the δ13C of mangrove leaves at Yingluo Village of Shankou Town and Daguansha showed no significant difference between sites.The δ13C of Spartina alterniflora at Saltern of Beimu and Qingshantou Village of Yingpan Town were not obviously different from each other.The TOC,TN,δ13C,and δ15N of the surface sediments at the five sampling sites were not significantly different,indicating that the TOC,TN,δ13C,and δ15N of the surface sediments on the south coast of Beihai City were relatively evenly distributed.The δ13C of higher plants along the beach was mainly affected by the even atmosphere,and the difference between different areas and sites was small.Therefore,the δ13C of higher plants of mangroves and S.alterniflora in different locations also varied slightly.The southern coast of Beihai in this survey was relatively open and there was no large river inflow to it,so the difference of δ15N in tidal flat sediment was small.Since plants had no fractional distillation on nitrogen isotope absorption,the difference in δ15N between mangroves and S.alterniflora in different locations in this survey was also very small.There was no significant difference in the δ13C of E.clathrata in Yingluo Village,Beimu Saltworks,Zhulin Saltworks and Daguansha,but there was a significant difference in δ15N.The δ15N of E.clathrata in Zhulin Saltworks was significantly lower than that in Beimu Saltworks.There was no significant difference in the δ13C of G.gracilis in Beimu Salt Farm and Qingshantou Village of Yingpan Town.The δ13C of G.gracilis in Zhulin Salt Farm was significantly lower than that of the other two sites.There was no significant difference in δ15N of the three sites.The reasons for the difference of δ13C or δ15N of macroalgae between different sites need to be further studied.The results of this study provide reference data for analyzing the effects of macrophytes and sediments on the tidal flat bait and nutrient sources on the southern coast of the North Sea. |
| Key words: south coast of Beihai intertidal zone plant sediment carbon stable isotope nitrogen stable isotope |
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