Functional group diversity is key to Southern Ocean benthic carbon pathways.
Functional group diversity is key to Southern Ocean benthic carbon pathways.
复制标题
DOI：
10.1371/journal.pone.0179735
复制
发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Sands CJ
中科院分区：
文献类型：
--
作者：
Barnes DKA;Sands CJ
高纬度底栖生物在海洋碳的积累和储存方面具有全球重要性，这可能对区域变暖产生反馈。了解这种生态系统服务是重要的，但困难的，因为复杂的分类多样性，历史和地理的底栖生物量。使用南格鲁吉亚作为一个模型位置（底栖生物学的历史和地理研究相对较好），我们调查了功能组的组成是否是底栖生物积累，固定和埋葬路径封存的关键，并通过简化识别帮助他们的研究。我们重新分类，）形态和碳质量的数据，以13个功能组，为每个样本的32个网站周围的南格鲁吉亚大陆架。研究了包括官能团组成在内的多因素对碳积累、固定和封存估算的影响。功能组表现出较高的多样性内和之间的网站，内和之间的栖息地类型。碳储存没有联系到一个功能组，特别是，但积累和固定增加的功能组的数量和存在的硬基质。官能团对碳埋率也很重要，碳埋率随着混合基质（硬基质和软基质）的存在而增加。功能组表现出很高的替代分类组成，并检查对比栖息地分类是有用的。功能组不仅有助于海洋碳储存调查，减少时间，减少对团队规模和专业的需求，而且对海底碳途径本身也很重要。海底碳储存有独特的地理位置;海底巨砾区是碳积累和固定的热点，而这些巨砾区与沉积物之间的界面是埋藏和封存的关键地点。
High latitude benthos are globally important in terms of accumulation and storage of ocean carbon, and the feedback this is likely to have on regional warming. Understanding this ecosystem service is important but difficult because of complex taxonomic diversity, history and geography of benthic biomass. Using South Georgia as a model location (where the history and geography of benthic biology is relatively well studied) we investigated whether the composition of functional groups were critical to benthic accumulation, immobilization and burial pathway to sequestration–and also aid their study through simplification of identification. We reclassified,) morphotype and carbon mass data to 13 functional groups, for each sample of 32 sites around the South Georgia continental shelf. We investigated the influence on carbon accumulation, immobilization and sequestration estimate by multiple factors including the compositions of functional groups. Functional groups showed high diversity within and between sites, and within and between habitat types. Carbon storage was not linked to a functional group in particular but accumulation and immobilization increased with the number of functional groups present and the presence of hard substrata. Functional groups were also important to carbon burial rate, which increased with the presence of mixed (hard and soft substrata). Functional groups showed high surrogacy for taxonomic composition and were useful for examining contrasting habitat categorization. Functional groups not only aid marine carbon storage investigation by reducing time and the need for team size and speciality, but also important to benthic carbon pathways per se. There is a distinct geography to seabed carbon storage; seabed boulder-fields are hotspots of carbon accumulation and immobilization, whilst the interface between such boulder-fields and sediments are key places for burial and sequestration.