Spatial Habitat Shifts of Oceanic Cephalopod (Ommastrephes bartramii) in Oscillating Climate
Spatial Habitat Shifts of Oceanic Cephalopod (Ommastrephes bartramii) in Oscillating Climate
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DOI：
10.3390/rs12030521
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发表时间：
2020-02-01
期刊：
影响因子：
5
通讯作者：
Imamura, Yutaka
中科院分区：
文献类型：
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作者：
Alabia, Irene D.;Saitoh, Sei-Ichi;Imamura, Yutaka
短期和长期气候振荡影响海景，从而影响海洋生态系统的结构和动态。在这里，我们探索了北太平洋西部和中部潜在的鱿鱼栖息地的时空模式，跨越了十年间的气候转变，与持续变暖和变冷的时期一致。利用对鱿鱼分布和发生影响最大的环境因子建立的多集合物种分布模型的输出，得到了巴特拉米乌贼潜在的栖息地分布。我们的分析捕捉到了潜在的鱿鱼栖息地的潜在时间趋势，以响应在每个气候转变中发生的环境变化，受1999-2013年太平洋年代际振荡(PDO)的相移调节。环境条件的空间差异在过渡期间是明显的，并可能随着时间的推移调节当地适宜的鱿鱼栖息地的变化。具体地说，在PDO从冷到暖的转变过程中，夏季潜在栖息地(平均速率+/-标准差：-0.04+/-0.02栖息地适宜性指数(HSI)/年)沿亚北极锋带南缘(东经162度-西经172度)下降。巧合的是，该地区也表现出变暖的趋势(平均时间趋势：0.06+/-0.21摄氏度/年)，并伴随着日期线以西的冷核中尺度涡旋的盛行(平均海面高度的时间趋势：-0.19+/-1.05厘米/年)。这些条件可能会为鱿鱼创造不太有利的觅食栖息地。然而，从温暖到寒冷的PDO过渡支持了适宜栖息地的北移和潜在鱿鱼栖息地损失率最高的地区的东移(西经170-160度；平均时间趋势：-0.05+/-0.03 HSI/Yr)。尽管如此，无论气候变化如何，越来越适合栖息地的地区的出现表明了这些地区作为潜在的鱿鱼栖息地热点和气候避难所的生态重要性。
Short- and long-term climate oscillations impact seascapes, and hence, marine ecosystem structure and dynamics. Here, we explored the spatio-temporal patterns of potential squid habitat in the western and central North Pacific across inter-decadal climate transitions, coincident with periods of persistent warming and cooling. Potential habitat distributions of Ommastrephes bartramii were derived from the outputs of multi-ensemble species distribution models, developed using the most influential environmental factors to squid distribution and occurrence data. Our analyses captured the underlying temporal trends in potential squid habitat in response to environmental changes transpiring at each climatic transition, regulated by phase shifts in Pacific decadal oscillation (PDO) from 1999-2013. The spatial differences in environmental conditions were apparent across transitions and presumably modulate the local changes in suitable squid habitat over time. Specifically, during a cold to warm PDO shift, decreases in the summer potential habitat (mean rate +/- standard deviation: -0.04 +/- 0.02 habitat suitability index (HSI)/yr) were observed along the southern edge of the subarctic frontal zone (162 degrees E-172 degrees W). Coincidentally, this area also exhibits a warming trend (mean temporal trend: 0.06 +/- 0.21 degrees C/yr), accompanied with the prevalence of cold-core mesoscale eddies, west of the dateline (mean temporal trend in sea surface height: -0.19 +/- 1.05 cm/yr). These conditions potentially generate less favorable foraging habitat for squid. However, a warm-to-cold PDO transition underpins a northward shift of suitable habitat and an eastward shift of regions exhibiting the highest rate of potential squid habitat loss (170-160 degrees W; mean temporal trend: -0.05 +/- 0.03 HSI/yr). Nonetheless, the emergence of the areas with increasingly suitable habitat regardless of climate transitions suggests the ecological importance of these regions as potential squid habitat hotspots and climatic refugia.