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首页> 外文期刊>Archiv fur Hydrobiologie >Production and respiration of epilithic algal communities in Irish lakes of different trophic status
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Production and respiration of epilithic algal communities in Irish lakes of different trophic status

机译：营养状态不同的爱尔兰湖泊中表层藻类群落的产生和呼吸

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Metabolism of shallow epilithic algal communities for 21 lakes of different trophic status in Ireland was measured by changes in dissolved oxygen in chambers. Epilithic net community production ranged from 51 to 805 mg O-2 M-2 h(-1) (ca. 16 to 270mg Cm-2 h(-1)), and likely was a substantial contributor to whole-lake production in the more shallow lakes. Stepwise multiple regression using 10 environmental variables indicated that alkalinity and turbidity explained a significant amount of the variance in net community and gross primary production, while color and turbidity were most related to respiration rates. Alkalinity and turbidity were associated with watershed geology and land use, as lakes in limestone areas were more influenced by agricultural inputs. Lower respiration in highly colored takes may have indicated a lower supply of organic matter for heterotrophs. Traditional, pelagic-based, trophic classification parameters for the lakes had weak or nonsignificant linear relationships to epilithic production because some lakes with intermediate nutrient and phytoplankton chlorophyll concentrations had higher production than lakes with greater concentrations but lower water clarity. More of the variance in periphyton production was significantly explained using a derived variable that combined phosphorus concentration and light reducing factors (chlorophyll, turbidity and water color), suggesting trophic indicators that reflect both nutrient loading and light availability may be more applicable for estimating whole-lake production in lakes where benthic processes dominate energy budgets. A conceptual model is proposed for examining how watershed and physicochemical parameters can interact to potentially influence periphyton production in the many shallow lakes in Ireland. [References: 36]
机译：通过室内溶解氧的变化来测量爱尔兰21个营养状态不同的浅表石藻藻群落的代谢。上石器时代的净社区生产范围从51到805 mg O-2 M-2 h（-1）（约16到270mg Cm-2 h（-1）），很可能是整个湖水生产的重要贡献者。更浅的湖泊。使用10个环境变量的逐步多元回归表明，碱度和浊度解释了净群落和初级总产值的显着差异，而颜色和浊度与呼吸速率最相关。碱度和浊度与流域地质和土地利用有关，因为石灰岩地区的湖泊更受农业投入的影响。彩色衣服中较低的呼吸可能表明异养生物的有机物供应减少。湖泊传统的基于浮游的营养分类参数与石器时代的产量之间存在弱的或不显着的线性关系，因为某些养分和浮游植物叶绿素浓度中等的湖泊的产量要高于浓度较高但水质透明度较低的湖泊。使用结合了磷浓度和减光因子（叶绿素，浊度和水色）的导出变量，可以明显地解释围生植物产量的更多差异，这表明反映养分含量和光利用率的营养指标可能更适用于估算全营养素。底栖过程主导能源预算的湖泊中的湖泊生产。提出了一个概念模型来检查流域和理化参数如何相互作用，以潜在地影响爱尔兰许多浅水湖泊中浮游植物的生产。 [参考：36]

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