| CHEN Lei,LI Chaolun,ZHOU Konglin,SHI Yongqiang,LIU Mengtan. 2018. Effects of nutrient limitations on three species of zooplankton. Acta Oceanologica Sinica, 37(4):58－68 |
| Effects of nutrient limitations on three species of zooplankton |
| 营养限制对三种浮游动物的影响 |
| Received:May 24, 2017 |
| DOI：10.1007/s13131-017-1122-z |
| Key words:zooplankton nutrient growth reproduction stoichiometric homoeostasis |
| 中文关键词: 浮游动物 营养元素 生长 繁殖 化学计量学内稳态 |
| 基金项目:The National Key R & D Program of China under contract No. 2017YFC1404401; the National Natural Science Foundation of China under contract No. 41476139; the National Basic Research Program of China under contract No. 2015CB452903. |
| Author Name | Affiliation | E-mail | | CHEN Lei | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | LI Chaolun | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
University of Chinese Academy of Sciences, Beijing 100049, China
Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | lcl@qdio.ac.cn | | ZHOU Konglin | Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | SHI Yongqiang | Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China | | | LIU Mengtan | Jiaozhou Bay Marine Ecosystem Research Station, Chinese Ecosystem Research Network, Qingdao 266071, China | |
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| Abstract: |
| Nutrient imbalance-a mismatch in nutrient ratios between the available food supply and the demands of consumers-has the potential to be transported up food chains, exposing zooplankton to nutrient limitations. In this study, the response of Calanus sinicus (copepod), Moina mongolica (cladocera), and Brachionus plicatilis (rotifer) to nutrient-limited (no-limited, P-limited, and N-limited) food were evaluated from the perspective of growth, reproduction, and stoichiometric homoeostasis. The results indicated that the growth of three species was suppressed under nutrient-limited (especially P-limited) conditions. However, the effect of nutrient limitations on their reproduction was species-specific. For C. sinicus, the dietary UFA (unsaturated fatty acid) as a major phospholipid component affected their egg production and total FA supporting energy promoted the hatchability of eggs. Furthermore, excess carbon in the diet promoted egg production but reduced hatching success. For M. mongolica, nutritional (P and UFA) and energy (total FA) support affected their fecundity. B. plicatilis fecundity exhibited the same pattern of growth (no-limited>N-limited>P-limited). In terms of stoichiometric homeostasis, B. plicatilis's elemental compositions were less likely to be affected by nutrient limitations than M. mongolica. We suggest that the effects of nutrient imbalances could potentially become an evolutionary force affecting ecosystem structure and stability in eutrophic waters. |
| 中文摘要: |
| 营养失衡是指消费者的饵料供给与自身需求在元素组成上的错配。这种失衡效应会沿食物链向上传递，使浮游动物面临营养限制。本研究探究了中华哲水蚤（Calanus sinicus），蒙古裸腹水溞（Moina mongolica）和褶皱臂尾轮虫（Brachionus plicatilis）对正常、磷限制和氮限制饵料在生长、繁殖和化学计量学内稳态三方面的响应。结果显示，三种浮游动物的生长在营养限制（尤其磷限制）条件下都降低。然而，营养限制对其繁殖的影响是种间特异的。对于中华哲水蚤，饵料中不饱和脂肪酸作为主要的磷脂来源影响着其产卵率；饵料中提供能量的脂肪酸含量促进了卵的孵化。同时，饵料中过量的碳促进了产卵却抑制了孵化率。对于蒙古裸腹水溞，饵料的营养（磷和不饱和脂肪酸）和能量（总脂肪酸）支持促进了其繁殖能力。褶皱臂尾轮虫在三种营养条件下的繁殖能力与生长表现出了相同的趋势（正常组 > 氮限制组 > 磷限制组）。对于化学计量学内稳态方面，较蒙古裸腹水溞，褶皱臂尾轮虫的元素组成更不容易受到营养限制的影响。我们认为这种营养失衡效应是影响富营养化生态系统结构和稳定的一种潜在的驱动力量。 |
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