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Feeding response of the tropical copepod Acartia erythraea to short-term thermal stress: more animal-derived food was consumed
Hu, Simin; Liu, Sheng; Wan, Lingli1; Li, Tao2; Huang, Hui2
2018
Source PublicationPEERJ
ISSN2167-8359
Volume6Pages:e6129
AbstractThe objective of this study was to explore the feeding response of tropical copepods to short-term thermal shock and provide insight into the potential impact of coastal power plants on the trophic dynamics of tropical coastal ecosystems. Feeding experiments were conducted at three different temperatures (29 degrees C, 33 degrees C, and 35 degrees C) using the copepod Acartia erythraea, collected from Sanya Bay, China. The grazing rate of A. erythraea decreased dramatically in the high temperature treatment. Analysis of 18S rDNA clone libraries revealed that the diet of copepods from different treatments was mainly comprised of diatoms, metazoans, and protozoans; A. erythraea exhibited an obvious feeding preference shift with temperature, with a change from a diatom-dominated diet at 29 degrees C to a metazoan-dominated diet at 35 degrees C, and the omnivory index shifted from 0.1 to 2.84 correspondingly. Furthermore, A. erythraea showed a positive feeding response to plant food (i.e., phytoplankton and land plants) in the control treatment (29 degrees C), but a positive response to animal prey (i.e., metazoans and protozoans) at temperatures exceeding 33 degrees C, as evaluated by the Ivley's selectivity index. Our results suggest that copepods could regulate their food intake by considering their energy demands when exposed to short-term thermal stress, which might influence the pathway of materials moving up the trophic system. However, further studies are required to elucidate the effects of elevated temperature on feeding of different organisms in order to predict the influence of thermal pollution on the food web of tropical coastal ecosystems.
DepartmentLMB
KeywordFeeding response Thermal pollution Tropical coastal ecosystem Copepod
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17590
Collection中科院海洋生物资源可持续利用重点实验室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Trop Marine Biol Res Stn Hainan, Sanya, Hainan, Peoples R China
Recommended Citation
GB/T 7714
Hu, Simin,Liu, Sheng,Wan, Lingli,et al. Feeding response of the tropical copepod Acartia erythraea to short-term thermal stress: more animal-derived food was consumed[J]. PEERJ,2018,6:e6129.
APA Hu, Simin,Liu, Sheng,Wan, Lingli,Li, Tao,&Huang, Hui.(2018).Feeding response of the tropical copepod Acartia erythraea to short-term thermal stress: more animal-derived food was consumed.PEERJ,6,e6129.
MLA Hu, Simin,et al."Feeding response of the tropical copepod Acartia erythraea to short-term thermal stress: more animal-derived food was consumed".PEERJ 6(2018):e6129.
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