Estimation of the Changes in Phytoplankton Community Composition in a Volcanic Acidotrophic Lake, Inawashiro, Japan
Estimation of the Changes in Phytoplankton Community Composition in a Volcanic Acidotrophic Lake, Inawashiro, Japan
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日本猪苗代火山酸营养湖浮游植物群落组成变化的估计
DOI：
10.2521/jswtb.50.53
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
N. Sugiura
中科院分区：
文献类型：
--
作者：
Daisuke Sutani;M. Utsumi;Yoshimori Kato;N. Sugiura
稻川代湖、日原湖、小野川湖和秋本湖位于Mt.日本东北部福岛县的万代。通过对这四湖浮游植物群落的长期动态分析，利用多变量分析方法，对近年来出现pH中和现象的稻生湖浮游植物群落组成的变化进行了估计。典范对应分析（CCA）结果表明，四湖浮游植物群落组成的差异主要由pH值、浮游动物密度（ZOO）、总氮浓度（T-N）、混合层内月平均光合有效辐射（PAR.m）和氮磷比（N/P）5个环境因子决定。根据水温、水温、水温通过OMI分析，将48种浮游植物分为广布种、嗜酸种、环中性中营养种和环中性寡中营养种4类。这四个类群的生态位表明，如果稻生代湖发生富营养化，稻生代湖将出现微囊藻等环中性中营养物种，该湖的浮游植物群落组成将接近于日原湖、小野川湖和秋本湖。
Lakes Inawashiro, Hibara, Onogawa, and Akimoto are located around Mt. Bandai in Fukushima Prefecture, northeastern Japan. The changes in phytoplankton community composition in the acidotrophic lake Inawashiro, where neutralization in pH was observed in recent years, were estimated by analyzing the long-term dynamics of phytoplankton communities in these four lakes by using multivariate analyses. Canonical correspondence analysis (CCA) suggested that the differences in phytoplankton community composition across the four lakes could be predominantly explained by five environmental factors: pH, zooplankton density (ZOO), total nitrogen concentration (T-N), average monthly photosynthetically active radiation within the mixed layer (PAR.m), and nitrogen/ phosphorus (N/P) ratio. The niche of species according to the habitat designated by six environmental factors, including water temperature (W.T.), was assessed by conducting outlying mean index (OMI) analysis, and 48 phytoplankton species were classified into the following four groups: widely distributed species, acidophilous species, circumneutral mesotrophic species, and circumneutral oligo-mesotrophic species. The niches of the four groups suggested that circumneutral mesotrophic species such as Microcystis sp. would occur in Lake Inawashiro and the phytoplankton community composition of this lake would approach that of Lakes Hibara, Onogawa, and Akimoto if eutrophication occurs in