Growth responses of a green alga to multiple environmental drivers
Growth responses of a green alga to multiple environmental drivers
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DOI：
10.1038/nclimate2682
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发表时间：
2015-09-01
影响因子：
30.7
通讯作者：
Collins, Sinead
中科院分区：
文献类型：
--
作者：
Brennan, Georgina;Collins, Sinead
全球变化的一个特点是，生物群必须对多种环境驱动因素而不是单一因素作出反应。通过在含有一到八种不同驱动因素的环境中培养一种光合微生物模型，包括CO2，温度和pH值的变化，以不同的组合，我们表明驱动因素的数量和身份解释了人口增长率的变化。这是因为生物对多种环境驱动因素的反应取决于对单一主导驱动因素的反应，并且随着驱动因素的数量增加，存在大影响的驱动因素的机会增加。驱动因素之间的相互作用略微抵消了预期的增长下降。我们的研究结果表明，人口增长以可预测的方式与环境驱动因素的数量下降，并提供了一个经验支持的模型，从生物体的反应，以单一的驱动因素的研究规模扩大到预测大量的环境驱动因素的反应。
One feature of global change is that biota must respond not to single, but to multiple environmental drivers. By growing a model photosynthetic microbe in environments containing between one and eight different drivers, including changes in CO2, temperature, and pH, in different combinations, we show that the number as well as the identities of drivers explain shifts in population growth rates. This is because the biotic response to multiple environmental drivers depends on the response to the single dominant driver, and the chance of a driver of large effect being present increases with the number of drivers. Interactions between drivers slightly counteract the expected drop in growth. Our results demonstrate that population growth declines in a predictable way with the number of environmental drivers, and provide an empirically supported model for scaling up from studies on organismal responses to single drivers to predict responses to large numbers of environmental drivers.