North Atlantic warming over six decades drives decreases in krill abundance with no associated range shift.
North Atlantic warming over six decades drives decreases in krill abundance with no associated range shift.
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DOI：
10.1038/s42003-021-02159-1
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发表时间：
2021-05-31
影响因子：
5.9
通讯作者：
Atkinson A
中科院分区：
文献类型：
--
作者：
Edwards M;Hélaouët P;Goberville E;Lindley A;Tarling GA;Burrows MT;Atkinson A
在北大西洋，磷虾（磷虾）是初级生产和捕食者（包括商业性捕捞的鱼类）之间的主要纽带。该盆地正在迅速变暖，预计物种将根据其耐热性向北迁移。然而，我们在这里表明，在过去 60 年中，表层磷虾丰度在原位发生了 50% 的下降，但没有相关的范围变化。虽然我们将这些变化与气候变暖联系起来，但我们的研究首次记录了该系统内生存空间的原位挤压。较温暖的等温线正在明显向北移动，但较冷的等温线仍然相对静止，受到西北大西洋副极地锋的阻碍。因此，定义磷虾分布核心的两个温度（7-13°C）在 60 年前纬度相差 8°，但目前仅相差 4°。 60年来，磷虾的核心纬度分布保持相对稳定，因此“栖息地挤压”，即生存空间纬度损失4°，可以解释磷虾数量的减少。这凸显出，随着气温变暖，并非所有物种都能追踪等温线并以相同的速度向北移动，在亚北极的“大西洋化”下，输家和赢家都会出现。马丁·爱德华兹等人。使用 1958 年至 2017 年北大西洋连续浮游生物记录仪调查的数据来检查磷虾分布和丰度与海面温度的关系，结果显示表面磷虾丰度下降了 50%，而没有相关的范围变化。这些数据显示，北部和南部的分布以前间隔8°的纬度，现在间隔4°，这表明变暖引起的范围缩小。
In the North Atlantic, euphausiids (krill) form a major link between primary production and predators including commercially exploited fish. This basin is warming very rapidly, with species expected to shift northwards following their thermal tolerances. Here we show, however, that there has been a 50% decline in surface krill abundance over the last 60 years that occurred in situ, with no associated range shift. While we relate these changes to the warming climate, our study is the first to document an in situ squeeze on living space within this system. The warmer isotherms are shifting measurably northwards but cooler isotherms have remained relatively static, stalled by the subpolar fronts in the NW Atlantic. Consequently the two temperatures defining the core of krill distribution (7–13 °C) were 8° of latitude apart 60 years ago but are presently only 4° apart. Over the 60 year period the core latitudinal distribution of euphausiids has remained relatively stable so a ‘habitat squeeze’, with loss of 4° of latitude in living space, could explain the decline in krill. This highlights that, as the temperature warms, not all species can track isotherms and shift northward at the same rate with both losers and winners emerging under the ‘Atlantification’ of the sub-Arctic. Martin Edwards et al. use data spanning from 1958–2017 from the Continuous Plankton Recorder Survey of the North Atlantic Ocean to examine krill distribution and abundance in conjunction with sea surface temperatures and show a 50% decline in surface krill abundance with no associated range shift. These data show that where the northern and southern distributions were previously separated by 8° of latitude, they are now separated by 4°, indicating a warming-induced range constriction.
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影响因子：
64.8
作者：
Beaugrand, G;Brander, KM;Reid, PC
通讯作者：
Reid, PC
DOI：
10.1016/j.dsr2.2008.05.016
发表时间：
2008-10-01
影响因子：
3
作者：
Dalpadado, Padmini;Yamaguchi, Atsushi;Johannessen, Signe
通讯作者：
Johannessen, Signe
影响因子：
2.4
作者：
LINDLEY, JA
通讯作者：
LINDLEY, JA
影响因子：
2.1
作者：
Jonas, TD;Walne, A;Hays, GC
通讯作者：
Hays, GC
影响因子：
64.8
作者：
Atkinson, A;Siegel, V;Rothery, P
通讯作者：
Rothery, P