Institute of Oceanography and Fisheries, Split, Croatia.
Department of Marine Studies, University of Split, Split, Croatia.
Environ Microbiol. 2019 Jul;21(7):2469-2484. doi: 10.1111/1462-2920.14634. Epub 2019 May 7.
Temperature and phosphorus positively interacted in controlling picoplankton biomass production and its transfer towards higher trophic levels. Two complementary approaches (experimental and field study) indicated several coherent patterns: (1) the impact of temperature on heterotrophic bacteria was high at temperatures lower than 16°C and levelled off at higher temperatures, whereas this impact on autotrophic picoplankton was linear along the entire range of the investigated temperatures; (2) the addition of phosphorus increased the values of picoplankton production and grazing, but did not change the nature of their relationships with temperature substantially; (3) the picoplankton carbon flux towards higher trophic levels was larger during the warmer months (grazing by HNF dominated during the warmer period and by ciliates during the colder period) and also strengthened in conditions without phosphorus limitation; (4) the hypothesis that the available phosphorus can be better utilized at higher temperatures was confirmed for both autotrophic and heterotrophic picoplankton; (5) the hypothesis that the rise in temperature stimulates growth only in conditions of sufficient phosphorus was confirmed only for heterotrophic bacteria. Therefore, in the global warming scenario, an increase of the picoplankton carbon flux towards higher trophic levels can be expected in the Adriatic Sea, particularly under unlimited phosphorus conditions.
温度和磷在控制微微型浮游生物生物量的产生及其向更高营养级的转移方面存在积极的相互作用。两种互补的方法（实验和现场研究）表明了几个一致的模式：（1）温度对异养细菌的影响在低于 16°C 时较高，在较高温度下趋于平稳，而对自养微微型浮游生物的影响则沿整个研究温度范围呈线性变化；（2）磷的添加增加了微微型浮游生物的生产力和摄食值，但并没有显著改变它们与温度的关系的本质；（3）微微型浮游植物碳向更高营养级的流动在温暖的月份更大（在温暖的时期由 HNF 摄食主导，而在较冷的时期由纤毛虫摄食主导），并且在没有磷限制的条件下也得到了加强；（4）自养和异养微微型浮游生物都证实了温度升高可以更好地利用可用磷的假设；（5）仅在磷充足的条件下，温度升高才能刺激生长的假设仅适用于异养细菌。因此，在全球变暖的情景下，可以预计亚得里亚海的微微型浮游植物碳向更高营养级的流动会增加，特别是在无磷限制的条件下。
