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首页> 外文期刊>Estuarine Coastal and Shelf Science >Influence of elevated temperature, pCO(2), and nutrients on larva-biofilm interaction: Elucidation with acorn barnacle, Balanus amphitrite Darwin (Cirripedia: Thoracica)
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Influence of elevated temperature, pCO(2), and nutrients on larva-biofilm interaction: Elucidation with acorn barnacle, Balanus amphitrite Darwin (Cirripedia: Thoracica)

机译：升高的温度，pCO（2）和营养对幼虫-生物膜相互作用的影响：阐明与橡子藤壶，龟amp蛇达尔文（Cirripedia：Thoracica）

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Selection of optimal habitat by larvae of sessile organism is influenced by cues offered by the biofilm. Ocean warming and acidification are likely to enforce changes in the biofilm community and inturn influence the settlement process. Hence, we evaluated the influence of biofilm (multispecies and unialgal) and diet-mediated changes on the settlement of Balanus amphitrite cyprids (presettlement non feeding larval stage) under different combinations of temperature (28, 30, 32 and 34 degrees C), pCO(2) (400, 750 and 1500 mu atm) and nutrient (unenriched and f/2 enriched). Nutrient enrichment enhanced the diatom and bacterial abundance at ambient temperature (30 degrees C) and pCO(2) (400 mu atm), which inturn increased larval settlement. Elevated pCO(2) (750 and 1500 mu atm) had no direct effect but a variable cascading effect on the settlement via biofilm-mediated changes was observed, depending on the type of biofilm. In contrast, elevated temperature (32 and 34 degrees C), either individually or in combination with elevated pCO(2) had direct negative effect on settlement. However, biofilm-mediated changes compensated this negative effect. The larval settlement was also influenced by changes in the larval diet. Under elevated temperature and pCO(2), cyprids raised with a feed (Chaetoceros calcitrans) from ambient temperature and pCO(2) were of poor quality (lower RNA:DNA ratio, lower protein synthetic capacity) and yielded lower settlement. However, cyprids raised with a feed from elevated temperature and pCO(2) were of better quality (higher RNA:DNA ratio, higher protein synthetic capacity) and yielded higher settlement. Overall, the observations from the present study provide insights into the significance of biotic interactions on the coastal biofouling communities under future climatic scenario and emphasise the need for future experiments on these aspects. (C) 2016 Elsevier Ltd. All rights reserved.
机译：无生物的幼虫对最佳生境的选择受生物膜提示的影响。海洋变暖和酸化可能会迫使生物膜群落发生变化，进而影响到定居过程。因此，我们评估了在不同温度（28、30、32和34摄氏度），pCO的组合下，生物膜（多物种和单藻类）和饮食介导的变化对an蒲蓝藻（定居非摄食幼体阶段）沉降的影响。 （2）（400、750和1500亩大气压）和养分（未富集和f / 2富集）。营养物的富集增强了环境温度（30摄氏度）和pCO（2）（400微米大气压）下的硅藻和细菌丰度，从而增加了幼虫的沉降。升高的pCO（2）（750和1500 mu atm）没有直接影响，但是观察到通过生物膜介导的变化对沉降的可变级联作用，具体取决于生物膜的类型。相反，升高的温度（32和34摄氏度），无论是单独使用还是与升高的pCO（2）结合使用，都对沉降产生直接的负面影响。但是，生物膜介导的变化弥补了这种负面影响。幼虫的沉降也受到幼虫饮食变化的影响。在升高的温度和pCO（2）下，用饲料（Chaetoceros calcitrans）从环境温度和pCO（2）饲养的赛普拉斯质量较差（RNA：DNA比率较低，蛋白质合成能力较低），沉降降低。但是，从高温和pCO（2）进料饲养的赛普拉斯质量更好（RNA：DNA比率更高，蛋白质合成能力更高），沉降更高。总体而言，本研究的观察结果为深入了解未来气候情景下生物相互作用对沿海生物污染群落的重要性提供了见识，并强调了在这些方面进行未来实验的必要性。 （C）2016 Elsevier Ltd.保留所有权利。

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