Intraspecific trait variation and trade-offs within and across populations of a toxic dinoflagellate
Intraspecific trait variation and trade-offs within and across populations of a toxic dinoflagellate
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DOI：
10.1111/ele.13138
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发表时间：
2018-10-01
期刊：
影响因子：
8.8
通讯作者：
Van de Waal, Dedmer B.
中科院分区：
文献类型：
--
作者：
Brandenburg, Karen M.;Wohlrab, Sylke;Van de Waal, Dedmer B.
种内性状多样性可以促进一个物种的成功，因为种群内功能性状的互补性可以提高其竞争成功率，并促进对不断变化的环境条件的适应力。在这里，我们通过实验确定了来自两个种群的15株有毒甲藻Alexandiumostenfeldii的性状之间的变异和关系。测定的性状包括生长速率、细胞大小、元素组成、氮吸收动力学、毒素产生和化感作用。我们的研究结果表明，在所有分析的性状在人群内和人群之间，特别是在氮亲和力，这是相当的浮游植物物种间的变化。我们发现最大氮吸收率和亲和力之间，防御和竞争性状之间的明显权衡。此外，我们确定了遗传相似的群体之间的性状变异的差异。在动态环境条件下，观察到的高性状变异可能有助于有害藻华的发展和恢复。
Intraspecific trait diversity can promote the success of a species, as complementarity of functional traits within populations may enhance its competitive success and facilitates resilience to changing environmental conditions. Here, we experimentally determined the variation and relationships between traits in 15 strains of the toxic dinoflagellate Alexandrium ostenfeldii derived from two populations. Measured traits included growth rate, cell size, elemental composition, nitrogen uptake kinetics, toxin production and allelochemical potency. Our results demonstrate substantial variation in all analysed traits both within and across populations, particularly in nitrogen affinity, which was even comparable to interspecific variation across phytoplankton species. We found distinct trade-offs between maximum nitrogen uptake rate and affinity, and between defensive and competitive traits. Furthermore, we identified differences in trait variation between the genetically similar populations. The observed high trait variation may facilitate development and resilience of harmful algal blooms under dynamic environmental conditions.