Special issue on The Southern Ocean: Biogeochemical cycles and pelagic food webs in a context of climate change
摘要截稿:
全文截稿: 2020-06-30
影响因子: 2.528
期刊难度:
CCF分类: 无
中科院JCR分区:
• 大类 : 地球科学 - 3区
• 小类 : 地球科学综合 - 3区
• 小类 : 海洋与淡水生物学 - 2区
• 小类 : 海洋学 - 3区
Overview
Special issue on The Southern Ocean: Biogeochemical cycles and pelagic food webs in a context of climate change
Linking biogeochemical cycles to the structure of pelagic communities from primary producers to large predators remains a major challenge for oceanographers. Our changing climate leads to rapid changes of marine ecosystems with potential drastic impacts on the biological pump functioning. Enhanced CO2 uptake together with a general greening of surface waters is already observed in the Southern Ocean. How such changes will affect the ecosystem dynamics is a major question today. Conceptual approaches have attempted to determine the role of ecological constraints on the carbon and energy fluxes within food webs. However, there is still a need for a more holistic view of the role of end-to-end biodiversity in structuring pelagic ecosystems and how this affects carbon flow, in particular vertical transfer vs. channeling towards the major food webs.
This special issue welcomes recent in situ campaign results, remote sensing analyses, and/or numerical studies, as well as review papers aimed at answering the question: How is organic carbon produced by autotrophic organisms transferred at depth, reprocessed by heterotrophic food webs, and/or channeled through the pelagic food webs up to top predators? The special issue encourages the submission of papers addressing the comparison of ecosystem functioning under contrasted production regimes in the Southern Ocean.
Specific questions include but are not limited to the following:
How does the availability of nutrients and light at the first trophic levels influence the end-to-end food web structure?
What are the primary factors responsible for the channeling of carbon and energy through the different pelagic food webs and/or towards the deep-sea sediments?
Can we define regional patterns within the Southern Ocean in relation to the physical and chemical structuring of different environments?
How will climate change impact the balance between the vertical export of carbon and its channeling through the food web?