A comparison of phytoplankton community assemblages in artificially and naturally mixed subtropical water reservoirs
A comparison of phytoplankton community assemblages in artificially and naturally mixed subtropical water reservoirs
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DOI：
10.1111/j.1365-2427.2006.01536.x
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发表时间：
2006-05-01
影响因子：
2.7
通讯作者：
O'Donohue, MJ
中科院分区：
文献类型：
--
作者：
Burford, MA;O'Donohue, MJ
1. 将水的机械和自然混合对浮游植物群落组合的影响进行了比较，其中一个水库在潮湿的夏季月份运行了去层化装置（北松水库），与两个相邻的水库（威文霍和萨默塞特水库）在澳大利亚亚热带地区运行了 6 年多。2。所有三个水库均以蓝细菌为主，相同的三个属占丰度的 75-80%，即 Aphanocapsa/Merismopedia/Cyanodictyon group、Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju 和 Planktolyngbya。尽管与其他水库相比，北松水库丰度的季节性差异较小，但所有三个水库中优势属之间的关联性是一致的。3．与自然混合水库相比，春季开启去层化装置的水库中，孤生丝状物种 C. raciborskii 和 Planktolyngbya 的丰度峰值出现得更早，群居物种 Aphanocapsa/Merismopedia/Cyanodictyon 的密度较低，这可能反映了人工混合对群居与独居物种的不同影响。 丝状物种.4。两个自然混合水库中磷酸盐浓度与藻类密度呈正相关，但人工混合水库则不然，人工混合水库表面的磷酸盐浓度接近检测限（0.06 mu M P）。因此，人工混合可能会促进能够利用和储存低浓度磷酸盐的物种（例如 C. raciborskii）的生长。
1. The effect of mechanical and natural mixing of water on phytoplankton community assemblages was compared in one reservoir with a destratification unit operating during the wet summer months (North Pine Reservoir) with two adjacent reservoirs without artificial mixing (Wivenhoe and Somerset Reservoirs) over 6 years in subtropical Australia.2. All three reservoirs were dominated by cyanobacteria, with the same three genera representing 75-80% of the abundance, i.e. Aphanocapsa/Merismopedia/Cyanodictyon group, Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju and Planktolyngbya. Associations between the dominant genera were consistent across all three reservoirs although there were reduced seasonal differences in abundance in North Pine Reservoir compared with the other reservoirs.3. Peaks in abundance of the solitary filamentous species C. raciborskii and Planktolyngbya occurred earlier and the densities of the colonial species Aphanocapsa/Merismopedia/Cyanodictyon were lower in the reservoir where the destratification unit was switched on in spring compared with the naturally mixed reservoirs, possibly reflecting the differential effect of artificial mixing on colonial versus solitary filamentous species.4. Phosphate concentrations were positively correlated with algal densities in the two naturally mixed reservoirs but not the artificially mixed reservoir where phosphate concentrations at the surface were near the limit of detection (0.06 mu M P). Artificial mixing may, therefore, promote the growth of species able to utilise and store low concentrations of phosphate, such as C. raciborskii.