Lee Matthew R, Torres Rodrigo, Manríquez Patricio H
Centro i∼mar, Universidad de Los Lagos, Camino a Chinquihue km.6, Puerto Montt, Chile.
Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Coyhaique, Chile; Centro de Investigación: Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Chile.
Mar Environ Res. 2017 Oct;131:1-9. doi: 10.1016/j.marenvres.2017.09.002. Epub 2017 Sep 8.
Climate change due to increased anthropogenic CO in the atmosphere is causing an increase in seawater temperatures referred to as ocean warming and a decrease in seawater pH, referred to as ocean acidification. The meiofauna play an important role in the ecology of marine ecosystems and the functions they provide. Using microcosms, meiofaunal assemblages were exposed to two temperatures (15 and 19 °C) and two pHs (pCO of 400 and 1000 ppm), both individually and in combination, for a period of 90 days. The hypothesis that increased temperature will increase meiofaunal abundance was not supported. The hypothesis that a reduced pH will reduce meiofaunal abundance and species richness was supported. The combination of future conditions of temperature and pH (19 °C and pCO of 1000 ppm) did not affect overall abundance but the structure of the nematode assemblage changed becoming dominated by a few opportunistic species.
大气中人为排放的二氧化碳增加导致气候变化，引起海水温度上升，即海洋变暖，以及海水pH值下降，即海洋酸化。小型底栖生物在海洋生态系统的生态学及其所提供的功能中发挥着重要作用。利用微观世界，将小型底栖生物群落分别和组合暴露于两种温度（15和19°C）和两种pH值（pCO分别为400和1000 ppm）下，持续90天。温度升高会增加小型底栖生物丰度这一假设未得到支持。pH值降低会降低小型底栖生物丰度和物种丰富度这一假设得到支持。未来温度和pH值条件（19°C和pCO为1000 ppm）的组合并未影响总体丰度，但线虫群落结构发生了变化，少数机会主义物种占主导地位。
