| Xu Cuilian,Hu Simin,Guo Zhiling,Li Tao,Huang Hui,Chan Leo Lai,Liu Sheng. 2020. Flexible feeding patterns of copepod Centropages tenuiremis in fluctuating conditions: a possible survival strategy to cope with disturbance. Acta Oceanologica Sinica, 39(2):59－68 |
| Flexible feeding patterns of copepod Centropages tenuiremis in fluctuating conditions: a possible survival strategy to cope with disturbance |
| 瘦尾胸刺水蚤适应近岸多变环境的灵活摄食策略 |
| Received:August 23, 2018 |
| DOI：10.1007/s13131-020-1553-9 |
| Key words:Centropages feeding response feeding strategy coastal ecosystem Daya Bay |
| 中文关键词: 胸刺水蚤 摄食响应 摄食策略 近岸生态系统 大亚湾 |
| 基金项目:The Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDA13020100; the National Key Research and Development Project of China under contract No. 2016YFC0502800; the Science and Technology Planning Projects of Guangdong Province, China under contract Nos 2015A020216013 and 2017B030314052. |
| Author Name | Affiliation | E-mail | | Xu Cuilian | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | Hu Simin | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | Guo Zhiling | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | Li Tao | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China | | | Huang Hui | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China | | | Chan Leo Lai | Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong 999077, China | | | Liu Sheng | Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | shliu@scsio.ac.cn |
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| Abstract: |
| Centropages tenuiremis is a species with a wide distribution range in disturbed coastal waters. However, due to a lack of dietary information, it remains unclear as to how they maintain such dominance in fluctuating conditions. In this study, C. tenuiremis was collected from the Daya Bay Nuclear Power Plant both in inlet and outfall regions at 06:00, 12:00 and 18:00 on April 27, 2011 and their in situ diet was analyzed using a PCR protocol targeting 18S ribosomal genes. Thirty-four species of prey organisms were identified totally, including Dinophyta, Baciliariophyta, Viridiplantae, Rhizaria, Apicomplexa, Chordata, Mollusca, Arthropoda and Fungi, indicating an obvious omnivorous feeding habit of C. tenuiremis. Centropages tenuiremis obviously exhibited spatial and temporal variations in diet composition. More plant prey (land plants and phytoplankton) were consumed in the morning (~50%), while more animal prey (metazoans and protozoans) were ingested at midday and night (60%–70%). Furthermore, a more diverse diet was detected in the outfall region (10–11 taxa), where the temperatures were relatively higher and more fluctuating, than in the control region (5–10 taxa). This finding indicated that C. tenuiremis could potentially expand its food spectrum under stressful condition. Specifically, C. tenuiremis exhibited phytoplankton preference (58.62%–67.64%) in the outfall region with a lower omnivory index (0.27–0.35) than in the control region (0.51–0.95). However, phytoplankton density was lower than that in the control region, suggesting a possible herbivorous tendency of C. tenuiremis under elevated temperatures to balance the energy acquirement and feeding effort. The flexible food choices of C. tenuiremis observed here could effectively buffer environmental fluctuations and might be an important survival strategy in coastal ecosystems. |
| 中文摘要: |
| 瘦尾胸刺水蚤广泛分布于环境多变的近岸生态系统中，研究其现场摄食、认识其能量获取策略是揭示其环境适应性的关键环节。本研究选取了食物环境波动的大亚湾核电站邻近海域为研究区域（进水口区域和排水口区域），于2011年4月27日早、中、晚三个时间点进行现场调查和采样，用分子生物学技术对瘦尾胸刺水蚤的食物组成进行了分析。共检测出34种食物，包含甲藻、硅藻、陆生植物、有孔虫、顶复门动物、脊索动物、软体动物、节肢动物和真菌，说明瘦尾胸刺水蚤是一种杂食性桡足类。瘦尾胸刺水蚤不同时间食物组成差异明显，早上摄食较多的植物性饵料（陆生植物和浮游植物），占食物组成的~50%，中午和晚上则主要以动物性饵料（后生动物和原生动物）为食，约为60%-70%。在温度波动较大的温排水区域，瘦尾胸刺水蚤摄食食物种类（10-11种）多于进水口区（5-10种），暗示在变动的环境中瘦尾胸刺水蚤可扩展其食物谱。此外，虽然排水口区域浮游植物的丰度低于进水口区域，但瘦尾胸刺水蚤在排水口区域摄食更多的浮游植物（58.62%-67.64%），杂食性指数（0.27-0.35）明显低于进水口区域（0.51-0.95），进一步说明，在温度较高的环境中瘦尾胸刺水蚤可增强对运动能力较弱的植物性饵料的摄食，平衡其能量需求。研究结果表明瘦尾胸刺水蚤可灵活调节其摄食行为以缓冲环境波动的影响，这可能是其适应近岸多变环境的一种重要生存策略。 |
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