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Visual Imaging of Benthic Carbonate-Mixed Factories in the Ross Sea Region Marine Protected Area, Antarctica
Minerals ( IF 2.5 ) Pub Date : 2021-07-31 , DOI: 10.3390/min11080833
Giorgio Castellan , Lorenzo Angeletti , Simonepietro Canese , Claudio Mazzoli , Paolo Montagna , Stefano Schiaparelli , Marco Taviani

Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic seas. Most information, however, derives from the post-mortem legacy of calcifying organisms. Prior imagery and evaluation of Antarctic habitats hosting calcifying benthic organisms are poorly present in the literature, therefore, a Remotely Operated Vehicle survey was carried out in the Ross Sea region Marine Protected Area during the 2013–2014 austral summer. Two video surveys of the seafloor were conducted along transects between 30 and 120 m (Adelie Cove) and 230 and 260 m (Terra Nova Bay “Canyon”), respectively. We quantified the relative abundance of calcifiers vs non-calcifiers in the macro- and mega-epibenthos. Furthermore, we considered the typology of the carbonate polymorphs represented by the skeletonized organisms. The combined evidence from the two sites reveals the widespread existence of carbonate-mixed factories in the area, with an overwhelming abundance of both low-Mg and (especially) high-Mg calcite calcifiers. Echinoids, serpulids, bryozoans, pectinid bivalves and octocorals prove to be the most abundant animal producers in terms of abundance. The shallower Adelie Cove site also showed evidence of seabed coverage by coralline algae. Our results will help in refining paleoenvironmental analyses since many of the megabenthic calcifiers occur in the Quaternary record of Antarctica. We set a baseline to monitor the future response of these polar biota in a rapidly changing ocean.

中文翻译:

南极罗斯海域海洋保护区底栖碳酸盐混合工厂的视觉成像

海洋生物骨骼生产是当今南极海域碳酸钙的主要来源。然而,大多数信息来自钙化生物的死后遗产。在文献中很少出现对南极栖息地钙化底栖生物的先前图像和评估,因此,在 2013-2014 年南方夏季期间在罗斯海地区海洋保护区进行了遥控车辆调查。分别沿着 30 到 120 m(Adelie Cove)和 230 到 260 m(Terra Nova Bay“峡谷”)之间的横断面对海底进行了两次视频调查。我们量化了大型和大型上底栖生物中钙化剂与非钙化剂的相对丰度。此外,我们考虑了骨架化生物所代表的碳酸盐多晶型的类型。来自这两个地点的综合证据表明,该地区广泛存在碳酸盐混合工厂,低镁和(特别是)高镁方解石钙化剂的数量非常丰富。就丰度而言,海胆科动物、蛇科动物、苔藓动物、果胶双壳类动物和八珊瑚动物被证明是最丰富的动物生产者。较浅的阿德利湾遗址也显示出珊瑚藻覆盖海底的证据。我们的结果将有助于完善古环境分析,因为许多巨型底栖钙化体出现在南极洲的第四纪记录中。我们设定了一个基线来监测这些极地生物群在快速变化的海洋中的未来反应。具有压倒性丰富的低镁和(特别是)高镁方解石钙化剂。就丰度而言,海胆科动物、蛇科动物、苔藓动物、果胶双壳类动物和八珊瑚动物被证明是最丰富的动物生产者。较浅的阿德利湾遗址也显示出珊瑚藻覆盖海底的证据。我们的结果将有助于完善古环境分析,因为许多巨型底栖钙化体出现在南极洲的第四纪记录中。我们设定了一个基线来监测这些极地生物群在快速变化的海洋中的未来反应。具有压倒性丰富的低镁和(特别是)高镁方解石钙化剂。就丰度而言,海胆科动物、蛇科动物、苔藓动物、果胶双壳类动物和八珊瑚动物被证明是最丰富的动物生产者。较浅的阿德利湾遗址也显示出珊瑚藻覆盖海底的证据。我们的结果将有助于完善古环境分析,因为许多巨型底栖钙化体出现在南极洲的第四纪记录中。我们设定了一个基线来监测这些极地生物群在快速变化的海洋中的未来反应。我们的结果将有助于完善古环境分析,因为许多巨型底栖钙化体出现在南极洲的第四纪记录中。我们设定了一个基线来监测这些极地生物群在快速变化的海洋中的未来反应。我们的结果将有助于完善古环境分析,因为许多巨型底栖钙化体出现在南极洲的第四纪记录中。我们设定了一个基线来监测这些极地生物群在快速变化的海洋中的未来反应。
更新日期:2021-08-01
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