Effects of temperature and irradiance on growth of strains belonging to seven Skeletonema species isolated from Dokai Bay, southern Japan
Effects of temperature and irradiance on growth of strains belonging to seven Skeletonema species isolated from Dokai Bay, southern Japan
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DOI：
10.1080/09670262.2011.565128
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发表时间：
2011-01-01
影响因子：
2.4
通讯作者：
Harrison, Paul J.
中科院分区：
文献类型：
--
作者：
Kaeriyama, Hideki;Katsuki, Eri;Harrison, Paul J.
研究了温度对阿登氏双丝藻、S. costatum sensu stricto，S. marinoi-dohrnii复合体，S. japonicum、日本血吸虫S. menzelii，S. pseudocostatum和S.在150 μ mol·m ~（-2）·s ~（-1）的辐照度和5 ~ 7种不同的温度条件下，对分离自日本南部东海湾的热带假单胞菌（tropicum）进行了研究。在7-700 μ mol·m ~（-2）·s ~（-1）的宽辐照度范围内，在20 ℃下，考察了辐照度对七种藻生长的影响。所有的刺线虫物种都能在15到25摄氏度的温度下生长。四株S. menzelii和5株S. ardens，S. marinoi-dohrnii复合体，S. japonicum和S.热带地区无显著性差异（Kruskal-Wallis检验，P 0.05）。在10、15、25和30 ℃下观察到特定生长率的显著种间差异（Kruskal-Wallis检验，P 0.01; Steel-Dwass检验，P 0.01）。色葡萄marinoi-dohrnii complex和S.在10 ℃和15 ℃的低温下，日本血吸虫的生长速度最快; ardens和S. menzelii在最高温度35 ℃下生长。从生长-辐照曲线的最大特定生长速率（最大值）范围为1.50至3.44 d-1。生长的辐照度（I 0）和饱和辐照度（S）的阈值范围为3.9至7.6 μ mol m-2 s-1，从250至740 μ mol m-2 s-1，分别。在多开湾，我们的研究结果表明，该物种的发生应主要受温度和光照的影响较小。特别是只有两个物种，S. marinoi-dohrnii complex和S.在寒冷季节，7个种都能在表层水中维持其种群数量，而在其他季节，7个种都能在河口环流的强烈影响下维持其种群数量，河口环流迅速将表层水冲出Dokai湾。温度和光照依赖的生长值与它们的地理分布很好地吻合。色葡萄marinoi-dohrnii complex和S.日本血吸虫在寒冷地区也能生长，但我们的研究结果表明，日本血吸虫在寒冷地区也能生长。ardens和S. menzelii将倾向于喜欢热带地区。
The effect of temperature on the growth of Skeletonema ardens, S. costatum sensu stricto, the S. marinoi-dohrnii complex, S. japonicum, S. menzelii, S. pseudocostatum and S. tropicum isolated from Dokai Bay in southern Japan were examined under five to seven different temperatures and an irradiance of 150 mu mol m-2 s-1. The effect of irradiance on the growth of the seven Skeletonema species was also examined under a wide range of irradiances ranging from 7-700 mu mol m-2 s-1 at 20 degrees C. All Skeletonema species were able to grow at temperatures ranging from 15 to 25 degrees C. Intra-species differences in specific growth rates of four strains for S. menzelii, and five strains for S. ardens, the S. marinoi-dohrnii complex, S. japonicum and S. tropicum were not significant (Kruskal-Wallis test, P 0.05). Significant inter-species differences in specific growth rates were observed at 10, 15, 25 and 30 degrees C (Kruskal-Wallis test, P 0.01; Steel-Dwass test, P 0.01). The S. marinoi-dohrnii complex and S. japonicum grew faster than other species at the lower temperatures of 10 and 15 degrees C, and S. ardens and S. menzelii grew at the highest temperature of 35 degrees C. The maximum specific growth rates (max) from growth-irradiance curves ranged from 1.50 to 3.44 d-1. Threshold values of irradiance (I0) and saturation irradiance (S) for growth ranged from 3.9 to 7.6 mu mol m-2 s-1, and from 250 to 740 mu mol m-2 s-1, respectively. In Dokai Bay, our results suggested that the occurrence of Skeletonema species should be affected mainly by temperature and less by irradiance. In particular, only two species, the S. marinoi-dohrnii complex and S. japonicum could maintain their populations in the surface water during the cold season, whereas during other periods, all seven species could maintain their population under the strong influence of estuarine circulation, which rapidly flushed the surface water out of Dokai Bay. Temperature and irradiance dependent growth values were in good agreement with their geographical distributions. The S. marinoi-dohrnii complex and S. japonicum were capable of growing in cold regions, but our results suggested that S. ardens and S. menzelii will tend to prefer tropical regions.