Sponge bioerosion accelerated by ocean acidification across species and latitudes?

Sponge bioerosion accelerated by ocean acidification across species and latitudes?
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跨物种和纬度的海洋酸化加速了海绵生物侵蚀?

DOI:
10.1007/s10152-014-0385-4
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发表时间:
2014
影响因子:
--
通讯作者:
Freiwald A
Freiwald A
中科院分区:
地球科学4区
文献类型:
--
作者:
Wisshak M;Schönberg CHL;Form A;Freiwald A

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在许多海洋生物地理领域,生物侵蚀海绵主导着软体动物床和珊瑚礁框架等钙质基质的内部生物侵蚀。它们以生物化学的方式溶解了部分碳酸盐,释放出所谓的海绵碎片,这一过程预计将在当前全球变化所固有的酸性环境中得到促进和加速。在北海Helgoland岛寒温带海域,通过对3种不同二氧化碳分压(pCO2)水平4天的实验,利用碱度异常技术评估了潜海绵ecliona celatgrant, 1826在亚化石牡蛎壳中的生物侵蚀能力。以0.08 ~ 0.1 kg m−2year−1为标准,定量测定了当前pco2的化学生物侵蚀速率。化学生物侵蚀与二氧化碳的增加正相关,在21世纪末的二氧化碳水平下,其速率将增加一倍以上,这清楚地证实了c。随着海洋酸化(OA)的进展,加速侵蚀有望得到加强。结合先前发表的实验证据,本研究结果表明OA加速了海绵的生物侵蚀(1)跨越纬度和生物地理区域,(2)与海绵生长形式无关,(3)对有或没有光共生体的物种都一样。随着OA的推进,海绵生物侵蚀的普遍增加预计会对全球碳酸盐(再)循环产生重大影响,并可能导致广泛的负面影响,例如对野生和养殖贝类种群的稳定性,以及热带和冷水珊瑚礁生态系统中的钙质框架构建者。
In many marine biogeographic realms, bioeroding sponges dominate the internal bioerosion of calcareous substrates such as mollusc beds and coral reef framework. They biochemically dissolve part of the carbonate and liberate so-called sponge chips, a process that is expected to be facilitated and accelerated in a more acidic environment inherent to the present global change. The bioerosion capacity of the demospongeCliona celataGrant, 1826 in subfossil oyster shells was assessed via alkalinity anomaly technique based on 4 days of experimental exposure to three different levels of carbon dioxide partial pressure (pCO2) at ambient temperature in the cold-temperate waters of Helgoland Island, North Sea. The rate of chemical bioerosion at present-daypCO2was quantified with 0.08–0.1 kg m−2year−1. Chemical bioerosion was positively correlated with increasingpCO2, with rates more than doubling at carbon dioxide levels predicted for the end of the twenty-first century, clearly confirming thatC. celatabioerosion can be expected to be enhanced with progressing ocean acidification (OA). Together with previously published experimental evidence, the present results suggest that OA accelerates sponge bioerosion (1) across latitudes and biogeographic areas, (2) independent of sponge growth form, and (3) for species with or without photosymbionts alike. A general increase in sponge bioerosion with advancing OA can be expected to have a significant impact on global carbonate (re)cycling and may result in widespread negative effects, e.g. on the stability of wild and farmed shellfish populations, as well as calcareous framework builders in tropical and cold-water coral reef ecosystems.
DOI: --
发表时间: --
期刊: --
影响因子: --
作者:
R. E. Grant
通讯作者: R. E. Grant
DOI: --
发表时间: 1958
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DOI: --
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期刊: Nature
影响因子: 64.8
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影响因子: 1.4
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DOI: --
发表时间: 1973
期刊:
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作者:
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