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Predator cues increase negative effects of a simulated marine heatwave on tropical zooplankton

机译:捕食者提示增加了在热带浮游生物上模拟海洋热浪的负面影响

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摘要

Mangroves and lagoons are spawning and nursery grounds of marine fish. These ecosystems are increasingly exposed to episodes of extreme temperatures from marine heatwaves (MHWs). However, it is unknown how MHW effects may interact with those of predators to affect the fitness of prey species in these ecosystems. To address the issue, we exposed the calanoid copepod Pseudodiaptomus incisus to a simulated MHW and with/without the presence of fish predator cues (FPC). The size at maturity, clutch size, hatching success, lifetime nauplii and faecal pellet production, and the adult lifespan were determined. All fitness parameters of P. incisus were lower under MHW. Remarkably, nauplii production was reduced 80%, and adult lifespan was shortened 50%, respectively. Overall, FPC increased the size at maturity and hatching at both temperatures. FPC also increased clutch size, nauplii and faecal pellet production in the control temperature, but decreased all three parameters under MHW. These results suggest that FPC may increase the vulnerability of P. incisus to MHWs by lowering reproductive success and reducing grazing rate. Our study sheds light on how interactive effects between biotic and abiotic factors may shape the vulnerability of marine copepods in mangroves and lagoons of tropical regions.
机译:红树林和泻湖正在产卵和苗圃的海洋鱼类。这些生态系统越来越多地暴露于来自海洋散热器(MHW)的极端温度的集中。然而,未知MHW效应如何与捕食者的效果相互作用以影响这些生态系统中的猎物物种的适应性。为了解决这个问题,我们将Calanoid Copepod Pseudodiaptomus意图暴露于模拟的MHW,并与/不存在鱼类捕食者提示(FPC)。确定的规模,离合器尺寸,孵化成功,终身Nauplii和粪便颗粒生产,以及成人寿命。在MHW下,P. Incisus的所有健身参数都较低。值得注意的是,Nauplii产量降低了80%,成人寿命分别缩短了50%。总体而言,FPC在成熟度和两个温度下孵化的尺寸增加。 FPC还增加了离合器尺寸,Nauplii和粪便颗粒生产在控制温度下,但在MHW下降低了所有三个参数。这些结果表明,通过降低生殖成功并降低放牧率,FPC可能会增加P. Incisus对MHW的脆弱性。我们的研究揭示了生物和非生物因素之间的互动效应如何塑造海洋桡足类的脆弱性,在热带地区的红树林和泻湖中。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2020年第sepaaoc期|151415.1-151415.8|共8页
  • 作者单位

    Vietnam Natl Univ Univ Sci Dept Ecol 334 Nguyen Trai Hanoi Vietnam;

    Vietnam Natl Univ Univ Sci Dept Ecol 334 Nguyen Trai Hanoi Vietnam|Nha Trang Univ Cam Ranh Ctr Trop Marine Res & Aquaculture Inst Aquaculture 2 Nguyen Dinh Chieu St Nha Trang City Vietnam;

    Nha Trang Univ Cam Ranh Ctr Trop Marine Res & Aquaculture Inst Aquaculture 2 Nguyen Dinh Chieu St Nha Trang City Vietnam;

    Nha Trang Univ Cam Ranh Ctr Trop Marine Res & Aquaculture Inst Aquaculture 2 Nguyen Dinh Chieu St Nha Trang City Vietnam;

    Nha Trang Univ Cam Ranh Ctr Trop Marine Res & Aquaculture Inst Aquaculture 2 Nguyen Dinh Chieu St Nha Trang City Vietnam;

    Nha Trang Univ Cam Ranh Ctr Trop Marine Res & Aquaculture Inst Aquaculture 2 Nguyen Dinh Chieu St Nha Trang City Vietnam|Washington State Univ Sch Biol Sci Pullman WA 99164 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Climate change; Lagoons; Mangroves; Marine heatwaves; Predator-prey interaction; Tropical coastal ecosystem;

    机译:气候变化;泻湖;红树林;海洋热浪;捕食者 - 猎物互动;热带沿海生态系统;

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