Bacterial and phytoplankton nutrient limitation in tropical marine waters, and a coastal lake in Brazil
Bacterial and phytoplankton nutrient limitation in tropical marine waters, and a coastal lake in Brazil
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DOI：
10.1016/j.jembe.2012.03.012
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发表时间：
2012-05-01
影响因子：
2
通讯作者：
Lindehoff, Elin
中科院分区：
文献类型：
--
作者：
Carlsson, Per;Graneli, Edna;Lindehoff, Elin
生物测定实验进行了两次（2年之间），以调查氮（N，铵），磷（P，磷酸盐）和碳（C，葡萄糖）的添加是否会刺激细菌和浮游植物的生长在三个不同的热带水生环境不同。水和它们的土著微生物群落取自巴西里约热内卢州卡波弗里奥外大西洋的淡水沿海湖（Cabiunas）、沿海（Anjos）和近海海洋站（Sonar）。将铵、磷酸盐和葡萄糖单独或组合添加至一式三份瓶中。在湖泊中，P似乎是主要的限制因素，在第一次实验中，因为细菌的生产和浮游植物的生长被刺激的P此外。两年后，然而，除了P抑制浮游植物的生长。在这两年中，C是密切的共同限制细菌，因为CP的增加大大增加了响应。对于这两个沿海和近海海水站，浮游植物的生长明显刺激N除了在这两年和细菌响应的P，N或C添加（单独或组合）。总之，从这些热带水生系统的结果表明，这是可能的，浮游植物和细菌可能会竞争一个共同的资源（P）在湖泊中，但可以限制不同的无机营养盐在海洋沃茨以及湖泊，这表明浮游植物和细菌不一定竞争相同的生长限制营养在这些环境中。(C)2012爱思唯尔有限公司版权所有。
Bioassay experiments were performed two times (with 2 years in between) in order to investigate if nitrogen (N, ammonium), phosphorus (P, phosphate) and carbon (C, glucose) additions would stimulate the growth of bacteria and phytoplankton differently in three different tropical aquatic environments. The water and their indigenous microbial communities were taken from a freshwater coastal lake (Cabiunas), a coastal (Anjos), and an offshore marine station (Sonar) in the Atlantic outside Cabo Frio, Rio de Janeiro State, Brazil. Ammonium, phosphate and glucose were added alone or in combination to triplicate bottles. In the lake, P seemed to be the primary limiting factor during the first experiment, since both bacterial production and phytoplankton growth was stimulated by the P addition. Two years later, however, addition of P inhibited phytoplankton growth. During both years, C was closely co-limiting for bacteria since CP additions increased the response considerably. For both the coastal and offshore seawater stations, phytoplankton growth was clearly stimulated by N addition in both years and the bacteria responded either to the P, N or C additions (alone or in combination). To conclude, the results from these tropical aquatic systems show that it is possible that phytoplankton and bacteria may compete for a common resource (P) in lakes, but can be limited by different inorganic nutrients in marine waters as well as lakes, suggesting that phytoplankton and bacteria do not necessarily compete for the same growth limiting nutrient in these environments. (C) 2012 Elsevier B.V. All rights reserved.