模拟 pH 值对波罗的海蓝藻的作用。
Modeling the Role of pH on Baltic Sea Cyanobacteria.
机构信息
Institute for Hydrobiology and Fisheries Science, Center for Earth System Research and Sustainability, University of Hamburg, Große Elbstraße 133, 22767 Hamburg, Germany.
Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany.
出版信息
Life (Basel). 2015 Mar 30;5(2):1204-17. doi: 10.3390/life5021204.
We simulate pH-dependent growth of cyanobacteria with an ecosystem model for the central Baltic Sea. Four model components-a life cycle model of cyanobacteria, a biogeochemical model, a carbonate chemistry model and a water column model-are coupled via the framework for aquatic biogeochemical models. The coupled model is forced by the output of a regional climate model, based on the A1B emission scenario. With this coupled model, we perform simulations for the period 1968-2098. Our simulation experiments suggest that in the future, cyanobacteria growth is hardly affected by the projected pH decrease. However, in the simulation phase prior to 1980, cyanobacteria growth and N2-fixation are limited by the relatively high pH. The observed absence of cyanobacteria before the 1960s may thus be explained not only by lower eutrophication levels, but also by a higher alkalinity.
我们使用一个针对中波罗的海的生态系统模型来模拟 pH 值依赖性的蓝藻生长。四个模型组件——蓝藻的生命周期模型、生物地球化学模型、碳酸盐化学模型和水柱模型——通过水生生物地球化学模型框架进行耦合。该耦合模型由基于 A1B 排放情景的区域气候模型输出驱动。利用该耦合模型，我们对 1968 年至 2098 年期间进行了模拟。我们的模拟实验表明，在未来，预计的 pH 值下降几乎不会影响蓝藻的生长。然而，在 1980 年之前的模拟阶段，蓝藻的生长和 N2 固定受到相对较高 pH 值的限制。因此，在 20 世纪 60 年代之前蓝藻不存在的现象，不仅可以用较低的富营养化水平来解释，也可以用较高的碱度来解释。
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