Photoperiod influences the shape and scaling of freshwater phytoplankton responses to light and temperature
Photoperiod influences the shape and scaling of freshwater phytoplankton responses to light and temperature
复制标题
光周期影响淡水浮游植物对光和温度的响应的形状和尺度
DOI：
10.1111/oik.08839
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发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Fey, Samuel B.
中科院分区：
文献类型：
--
作者：
Theus, Meredith E.;Layden, Tamara J.;McWilliams, Nancy;Crafton‐Tempel, Stephen;Kremer, Colin T.;Fey, Samuel B.
光波动无处不在，存在于多个时空尺度上，直接影响光自养生物的生理生态。然而，光波动对生物体对其他关键环境因素的敏感性的间接影响尚不清楚。在这里，我们评估了水生态系统的一个动态元素——光周期（生物体每天接受光的时间段）如何影响温度和辐照度（光强度）对浮游植物种群生长速度的相互作用。我们首先完成了一项文献综述和荟萃分析，表明光周期改变了温度（而不是辐照度）对藻类生长速度的个体影响，并强调了很少有研究在实验上操纵光周期、温度和辐照度。为了解决这一经验空白，我们对三种淡水浮游植物（莱茵衣藻、寻常小球藻和卵形隐单胞菌）进行了一组实验室实验。我们测量了每个物种在恒定（24小时光照：黑暗）环境下的生长速率与辐照度和温度梯度的关系。然后，我们评估了在不同光周期（6:18,12:12和16:8小时光照：黑暗）下测量的类似表面，并根据光可用时间的持续时间进行缩放，是否可以从恒定光照下的结果推断出来。对于大多数物种和光周期的组合，光周期有意义地改变了性能表面的截距和形状。这些差异在最短的光周期（6:18小时的光照：黑暗）下最为明显，在那里，人们的表现低于预期。性能表面的变化是非线性的，主要由温度决定，温度越高，生长速率越高。总的来说，这些实验和合成揭示了光周期制度可能影响温度、辐照度及其相互作用对浮游植物生长的影响。除了目前考虑的环境变量和生物体之外，本研究还强调了动态、非生物变量在影响其他环境因素之间关系的同时发挥直接作用的能力。
Light fluctuations are ubiquitous, exist across multiple spatial and temporal scales, and directly affect the physiology and ecology of photoautotrophs. However, the indirect effects of light fluctuations on the sensitivity of organisms to other key environmental factors are unclear. Here, we evaluate how photoperiod regime (period of time each day where organisms receive light), a dynamic element of aquatic ecosystems, can influence the interactive effects of temperature and irradiance (intensity of light) on the growth rate of phytoplankton populations. We first completed a literature review and meta‐analysis that suggests photoperiod alters the individual effects of temperature – but not irradiance – on algal growth rates and that highlights how few studies experimentally manipulate photoperiod, temperature and irradiance. To address this empirical gap, we conducted a set of laboratory experiments on three freshwater phytoplankton species (Chlamydomonas reinhardtii,Chlorella vulgarisandCryptomonas ovata). We measured performance surfaces relating growth rate to irradiance and temperature gradients for each species in constant (24:0 h of light:dark) environments. We then evaluated whether analogous surfaces measured under different photoperiods (6:18, 12:12 and 16:8 h of light:dark) and scaled by the duration of light availability could be inferred from results under constant light. For a majority of the combinations of species and photoperiods examined, photoperiod meaningfully altered the intercept and shape of performance surfaces. These differences were most pronounced under the shortest photoperiod (6:18 h light:dark), where populations underperformed expectations. Alterations to performance surfaces were non‐linear and mostly structured by temperature with higher temperatures yielding higher than anticipated growth rates. Collectively, these experiments and synthesis reveal the potential for photoperiod regime to influence the effects of temperature, irradiance and their interaction on phytoplankton growth. Beyond the environmental variables and organisms presently considered, this research highlights the capacity for dynamic, abiotic variables to exert direct effects while also influencing relationships among other environmental factors.
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影响因子：
2.9
作者：
J. Yoder
通讯作者：
J. Yoder
影响因子：
2.1
作者：
BEARDALL, J;BURGERWIERSMA, T;FONTVIELLE, D
通讯作者：
FONTVIELLE, D
周期性光照环境中阿加迪颤藻的光合作用、碳流和生长
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
A. Post;Johan G. Loogman;L. Mur
通讯作者：
L. Mur
DOI：
10.1098/rspb.2013.2612
发表时间：
2014-03-22
影响因子：
4.7
作者：
Vasseur, David A.;DeLong, John P.;O'Connor, Mary I.
通讯作者：
O'Connor, Mary I.
影响因子：
6.1
作者：
Koussoroplis, Apostolos-Manuel;Pincebourde, Sylvain;Wacker, Alexander
通讯作者：
Wacker, Alexander