Biotic response of benthic foraminifera to OMZ variations in the northwestern Pacific since the last deglaciation
Biotic response of benthic foraminifera to OMZ variations in the northwestern Pacific since the last deglaciation
复制标题
末次冰消期以来西北太平洋底栖有孔虫对 OMZ 变化的生物响应
DOI：
10.1007/s00367-020-00671-7
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发表时间：
2021
影响因子：
2.1
通讯作者：
Shibahara Akihiko
中科院分区：
文献类型：
--
作者：
Sakai Keisuke;Ohkushi Ken’ichi;Shibahara Akihiko
最近全球海洋中氧浓度的下降在中等深度的最低含氧区尤为严重。底栖有孔虫化石有可能提供关于海洋生物对海洋保护区过去变化的长期生物反应的有用信息。在最后一次冰川消融期间，西北太平洋1公里水深的OMZ加剧。然而，自最后一次冰川消融以来，OMZ上层底栖有孔虫的时间变化却知之甚少。因此，我们研究了取自日本北部北海道777米水深的沉积岩芯中底栖有孔虫组合的时间变化，以确定它们对末次冰川消退至全新世晚期OMZ上层环境变化的生物响应。结果表明，半滑舌藻和细小拟青霉等耐缺氧物种在Bölling/älerød变暖过程中迅速增加，这与OMZ的严重耗氧和扩张有关。在该地区1公里水深处也记录到了类似的缺氧组合。另一方面，在幼年仙女木寒冷时期，毒物物种拉布拉多非离子藻占主导地位，这可能表明氧化事件是由中间水分通风的加强引起的。全新世晚期，出现了由乌维格纳、波利维纳、巴蒂亚等组成的亚氧组合。这种与该地区现代组合相似的晚全新世组合的增加，可能与日本群岛周围的逐渐冷却相吻合。
Recent declines in oxygen concentrations in the global oceans have been particularly acute in oxygen minimum zones (OMZ) at intermediate depths. Fossil benthic foraminifera have the potential to provide useful information on the long-term biotic responses of marine organisms to past variations in the OMZ. During the last deglaciation, the OMZ at 1 km water depth in the northwestern Pacific Ocean intensified. However, temporal variations in benthic foraminifera in the upper layer of the OMZ since the last deglaciation are poorly understood. Thus, we studied temporal variations in benthic foraminifera assemblages in a sediment core taken from a water depth of 777 m off of Hokkaido, North Japan, to determine their biotic responses to environmental changes in the upper layer of the OMZ from the last deglaciation to the late Holocene. The results suggested that dysoxic species such asBolivina seminudaandBuliminella tenuataincreased rapidly during the Bølling/Ållerød warming event, which was associated with severe oxygen depletion and expansion of the OMZ. Similar dysoxic assemblages were recorded at 1 km water depth in this region. On the other hand, the dominance of the oxic speciesNonionellina labradoricaduring the Younger Dryas cold period may indicate that oxygenation events were induced by intensification of intermediate water ventilation. Suboxic assemblages composed ofUvigerina akitaensis,Bolivina spissa, andElphidium batialisappeared in the late Holocene. The increase in this late Holocene assemblage, which is similar to the modern assemblage in this region, may coincide with gradual cooling around the Japanese Islands.
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西北太平洋有孔虫作为古环境指标
DOI：
--
发表时间：
1989
期刊：
影响因子：
--
作者：
Y. Inoue
通讯作者：
Y. Inoue
DOI：
10.1016/j.palaeo.2005.09.003
发表时间：
2006-03
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
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作者：
I. Koizumi;R. Tada;H. Narita;T. Irino;T. Aramaki;T. Oba;Hirofumi Yamamoto
通讯作者：
I. Koizumi;R. Tada;H. Narita;T. Irino;T. Aramaki;T. Oba;Hirofumi Yamamoto
影响因子：
1.1
作者：
Bernhard, JM;SenGupta, BK;Borne, PF
通讯作者：
Borne, PF
极地海洋和鄂霍次克海研究
影响因子：
3.1
作者：
M. Aota;E. Uematsu
通讯作者：
E. Uematsu
通过对从下北半岛附近采集的 MD01-2409 岩芯中的底栖有孔虫组合进行高分辨率分析，揭示了 100 至 200 年周期的冰消缺氧事件
DOI：
10.5575/geosoc.112.166
发表时间：
2006
期刊：
Journal of the Geological Society of Japan
影响因子：
--
作者：
A. Shibahara;E. Arayama;K. Ohkushi;K. Aoki;Takashi Ito
通讯作者：
Takashi Ito