Recruitment of intertidal invertebrates in the southeast Pacific: Interannual variability and the 1997–1998 El Niño
Recruitment of intertidal invertebrates in the southeast Pacific: Interannual variability and the 1997–1998 El Niño
复制标题
东南太平洋潮间带无脊椎动物的补充：年际变化和 1997-1998 年厄尔尼诺现象
DOI：
10.4319/lo.2002.47.3.0791
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发表时间：
2002
影响因子：
4.5
通讯作者：
A. Sotomayor
中科院分区：
文献类型：
--
作者：
S. Navarrete;B. Broitman;E. Wieters;G. R. Finke;R. Venegas;A. Sotomayor
我们评估了年际变化和1997-1998年厄尔尼诺事件的招聘潮间贻贝和藤壶沿着智利中部海岸在东南太平洋的影响。在1997-1998年厄尔尼诺期间以及1998-1999年和1999-2000年的同一个月里，对分布在900公里（29- 348 S）上的11个地点的补充进行了每月监测，使我们能够评估年际补充变化的地理模式。观察到的跨年度趋势在地理上最为一致的是紫贻贝Perumytilus purpuratus，在1997-1998年厄尔尼诺年期间，其补充率总体较低。然而，在任何特定地点的影响幅度都很小。其他两个潮间带贻贝物种，以及两个chthamaloid藤壶，招聘率的年际变化，并不一致，整个地区，总体而言，几个网站表现出显着的差异。两个和三个数量级之间的差异，平均每年招聘的贻贝和藤壶观察网站之间，但网站的相对排名是相当相似的，多年来大多数物种。相反，1997年至1998年厄尔尼诺对藤壶招聘沿着加州中部和北方海岸的巨大积极影响，我们的研究结果表明，招聘占主导地位的潮间带藤壶沿着智利中部没有显着改变这个强大的海洋事件。各站点之间缺乏一致的趋势强调了在研究大规模海洋学异常时需要研究几个站点，并表明厄尔尼诺对年际补充变化的影响是不可预测的。
We evaluated interannual variability and the effect of the 1997–1998 El Niño event on recruitment of intertidal mussels and barnacles along the coast of central Chile in the southeast Pacific. Monthly monitoring of recruitment at 11 sites spread over 900 km (29–348S) during the 1997–1998 El Niño and over the same months in 1998–1999 and 1999–2000 allowed us to assess geographic patterns in interannual recruitment variation. The geographically most consistent interannual trend was observed for the mussel Perumytilus purpuratus, which showed overall lower recruitment rates during the 1997–1998 El Niño year. However, the magnitude of the effect at any given site was small. Interannual variation in recruitment rates of the other two intertidal mussel species, as well as two chthamaloid barnacles, were not consistent across the region, and overall, few sites exhibited significant differences among years. Differences between two and three orders of magnitude in mean annual recruitment of mussels and barnacles were observed among sites, yet the relative ranking of sites was fairly similar among years for most species. Contrary to the large positive effect that the 1997–1998 El Niño had on barnacle recruitment along the coast of central and northern California, our results show that recruitment of dominant intertidal barnacles along central Chile were not significantly altered by this strong oceanographic event. Lack of consistent trends among sites emphasizes the need to study several sites when looking at large‐scale oceanographic anomalies and shows that El Niño effects on interannual recruitment variation are not predictable.