Guerrero-Meseguer Laura, Marín Arnaldo, Sanz-Lázaro Carlos
Departamento de Ecología e Hidrología, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
Departamento de Ecología e Hidrología, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
Environ Pollut. 2017 Nov;230:40-45. doi: 10.1016/j.envpol.2017.06.039. Epub 2017 Jun 20.
Extreme weather events are major drivers of ecological change, and their occurrence is likely to increase due to climate change. The transient increases in atmospheric temperatures are leading to a greater occurrence of heat waves, extreme events that can produce a substantial warming of water, especially in enclosed basins such as the Mediterranean Sea. Here, we tested the effects of current and predicted heat waves on the early stages of development of the seagrass Posidonia oceanica. Temperatures above 27 °C limited the growth of the plant by inhibiting its photosynthetic system. It suffered a reduction in leaf growth and faster leaf senescence, and in some cases mortality. This study demonstrates that the greater frequency of heat waves, along with anticipated temperature rises in coming decades, are expected to negatively affect the germination of P. oceanica seedlings.
极端天气事件是生态变化的主要驱动因素，由于气候变化，其发生频率可能会增加。大气温度的短暂升高导致热浪发生更为频繁，热浪这类极端事件会使水体大幅升温，尤其是在地中海等封闭海域。在此，我们测试了当前和预测的热浪对海草波喜荡草发育早期阶段的影响。27°C以上的温度通过抑制其光合系统限制了植株生长。它的叶片生长减缓，叶片衰老加快，在某些情况下甚至死亡。这项研究表明，热浪发生频率增加以及未来几十年预期的气温上升，预计将对波喜荡草幼苗的萌发产生负面影响。
