马来西亚半岛水生栖息地中颗粒态和溶解态磷的分布。
Distributions of particulate and dissolved phosphorus in aquatic habitats of Peninsular Malaysia.
机构信息
Laboratory of Microbial Ecology, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Graduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Laboratory of Microbial Ecology, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
出版信息
Mar Pollut Bull. 2018 Mar;128:415-427. doi: 10.1016/j.marpolbul.2018.01.037. Epub 2018 Feb 6.
Particulate phosphorus was the dominant phosphorus species and accounted for 72 ± 5% of total phosphorus in coastal habitats, 63 ± 4% in estuaries, 58 ± 6% in lakes and 80 ± 7% in aquaculture farms whereas dissolved inorganic phosphorus (DIP) and dissolved organic phosphorus (DOP) were minor components. Correlation analyses (DIP vs Chl a; R = 0.407, df = 31, p < 0.001) suggested phosphorus limiting conditions in lakes, which was corroborated with the highest alkaline phosphatase activity (APA) that fluctuated from 0.38 to 41.14 nmol L min. In contrast, APA was elevated in coastal habitats and estuaries only when DIP concentration decreased below 0.9 μM. Moreover size-fractionation experiment showed that the highest APA was detected in the 0.2-2 μm pico-size fraction. Our results suggested that the main APA in coastal habitats and estuaries was from phototrophic pico-eukaryotes and heterotrophic bacteria, and regulated largely by DIP availability.
颗粒态磷是主要的磷形态，占沿海生境总磷的 72±5%，占河口的 63±4%，占湖泊的 58±6%，占水产养殖的 80±7%，而溶解无机磷（DIP）和溶解有机磷（DOP）则是次要成分。相关分析（DIP 与 Chl a；R=0.407，df=31，p<0.001）表明湖泊中存在磷限制条件，这与最高的碱性磷酸酶活性（APA）相吻合，APA 从 0.38 到 41.14 nmol L min 波动。相比之下，只有当 DIP 浓度降至 0.9 μM 以下时，沿海生境和河口的 APA 才会升高。此外，粒径分离实验表明，最高的 APA 出现在 0.2-2μm 的微微型颗粒级分中。我们的结果表明，沿海生境和河口的主要 APA 来自光养微微型真核生物和异养细菌，主要受 DIP 供应的调节。
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