A phenological shift in the time of recruitment of the shipworm, Teredo navalis L., mirrors marine climate change

For many species, seasonal changes in key environmental variables such as food availability, light, and temperature drive the timing (“phenology”) of major life-history events. Extensive evidence from terrestrial, freshwater, and marine habitats shows that global warming is changing the timings of many biological events; however, few of these studies have investigated the effects of climate change on the phenology of larval recruitment in marine invertebrates. Here, we studied temperature-related phenological shifts in the breeding season of the shipworm Teredo navalis (Mollusca, Bivalvia). We compared data for the recruitment period of T. navalis along the Swedish west coast during 2004–2006 with similar data from 1971–1973, and related differences in recruitment timing to changes in sea surface temperature over the same period. We found no significant shift in the timing of onset of recruitment over this ~30-year time span, but the end of recruitment was an average of 26 days later in...

对于众多物种而言，食物可获得性、光照、温度等关键环境变量的季节变化，主导着其主要生活史事件的发生时间（物候学，phenology）。来自陆地、淡水与海洋生境的大量研究证据表明，全球变暖正在改变诸多生物事件的发生时间；但现有研究中，极少有探讨气候变化对海洋无脊椎动物幼体招募物候的影响。本研究聚焦于船蛆（Teredo navalis，软体动物门，双壳纲）繁殖季与温度相关的物候变化。我们对比了2004年至2006年瑞典西海岸船蛆幼体招募期的观测数据，与1971年至1973年的同类数据，并将招募时间的差异与同期海表温度的变化进行关联分析。本研究发现，在这近30年的时间跨度中，幼体招募的起始时间未出现显著变化，但招募结束的时间平均延后了26天……