Animal survival strategies in Neoproterozoic ice worlds.
Animal survival strategies in Neoproterozoic ice worlds.
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新元古代冰川世界的动物生存策略。
DOI：
10.1111/gcb.16393
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发表时间：
2023-01
影响因子：
11.6
通讯作者：
中科院分区：
文献类型：
--
作者：
动物首次出现的时间对于理解地球上生命的进化至关重要。虽然化石记录显示最早的后生动物出现在572-602 Ma，但分子钟研究表明，后生动物的起源要早得多，可以追溯到约850 Ma。这些日期的差异将把动物生命的兴起置于一个被多个巨大的、潜在的全球性冰川事件打断的时期。虽然这两个学派争论彼此方法的局限性，但很少有时间致力于动物生命如何生存，如果它确实出现在这些全球冰川期之前或期间。最近的极地生物区系的历史表明，在整个末次盛冰期（33-14 Ka），生物已经找到了在南极大陆的冰上和周围生存的方法，一些特有物种在冈瓦纳大陆解体（180-23 Ma）之前就存在了。在这里，我们讨论的生存策略和栖息地的现代极地海洋生物的环境类似于那些可能存在于新元古代冰川。我们将讨论，尽管许多冰覆盖的，零度以下的南极海洋栖息地明显严酷，但动物生活在冰上和冰下蓬勃发展。冰主导的系统和过程通过水循环、氧化、陆源营养输入和新的生境使一些地方环境更适合居住。我们认为新元古代冰川的物理条件可能会极大地影响浅水区潜在生命的条件，并从大陆架上抹去任何可能的化石证据。最近的冰川周期通过充当“多样性泵”推动了南极洲独特动物群的进化，对于晚元古代和地球上动物生命的进化以及宇宙其他地方冰冷世界或卫星上的生命存在也是如此。化石记录将最早的后生动物定位在572-602 Ma，而分子钟研究表明，在多个全球冰川事件（雪球和泥球地球）打断的时间内，更早的起源可达~850 Ma。如果动物生命确实在这些冰川期之前或期间出现，它们将面临与现代极地海洋栖息地类似的条件，需要类似的生存策略。以冰为主的系统使一些环境更适合居住，最近的冰川周期推动了南极洲独特动物群的进化，对于晚元古代和地球上动物生命的进化也是如此。
The timing of the first appearance of animals is of crucial importance for understanding the evolution of life on Earth. Although the fossil record places the earliest metazoans at 572–602 Ma, molecular clock studies suggest a far earlier origination, as far back as ~850 Ma. The difference in these dates would place the rise of animal life into a time period punctuated by multiple colossal, potentially global, glacial events. Although the two schools of thought debate the limitations of each other's methods, little time has been dedicated to how animal life might have survived if it did arise before or during these global glacial periods. The history of recent polar biota shows that organisms have found ways of persisting on and around the ice of the Antarctic continent throughout the Last Glacial Maximum (33–14 Ka), with some endemic species present before the breakup of Gondwana (180–23 Ma). Here we discuss the survival strategies and habitats of modern polar marine organisms in environments analogous to those that could have existed during Neoproterozoic glaciations. We discuss how, despite the apparent harshness of many ice covered, sub‐zero, Antarctic marine habitats, animal life thrives on, in and under the ice. Ice dominated systems and processes make some local environments more habitable through water circulation, oxygenation, terrigenous nutrient input and novel habitats. We consider how the physical conditions of Neoproterozoic glaciations would likely have dramatically impacted conditions for potential life in the shallows and erased any possible fossil evidence from the continental shelves. The recent glacial cycle has driven the evolution of Antarctica's unique fauna by acting as a “diversity pump,” and the same could be true for the late Proterozoic and the evolution of animal life on Earth, and the existence of life elsewhere in the universe on icy worlds or moons. The fossil record places the earliest metazoans at 572–602 Ma, whilst molecular clock studies suggest an earlier origination, up to ~850 Ma, during a time punctuated by multiple global glacial events (snowball and slushball Earths). If animal life did arise before or during these glacial periods it would have faced conditions analogous with modern polar marine habitats, requiring similar survival strategies. Ice dominated systems make some environments more habitable and recent glacial cycles have driven the evolution of Antarctica’s unique fauna, the same could be true for the late Proterozoic and the evolution of animal life on Earth.
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影响因子：
5.4
作者：
Danovaro R;Dell'Anno A;Pusceddu A;Gambi C;Heiner I;Kristensen RM
通讯作者：
Kristensen RM
影响因子：
3.5
作者：
Ashkenazy, Yosef;Gildor, Hezi;Tziperman, Eli
通讯作者：
Tziperman, Eli
影响因子：
56.9
作者：
Canfield, Don E.;Poulton, Simon W.;Narbonne, Guy M.
通讯作者：
Narbonne, Guy M.
DOI：
10.1016/j.cub.2015.09.066
发表时间：
2015-11-16
期刊：
Current biology : CB
影响因子：
--
作者：
dos Reis M;Thawornwattana Y;Angelis K;Telford MJ;Donoghue PC;Yang Z
通讯作者：
Yang Z
影响因子：
4.6
作者：
Dohrmann M;Wörheide G
通讯作者：
Wörheide G