Climate change-contaminant interactions in marine food webs: Toward a conceptual framework

2017 ◽  
Vol 23 (10) ◽  
pp. 3984-4001 ◽  
Author(s):  
Juan José Alava ◽  
William W. L. Cheung ◽  
Peter S. Ross ◽  
U. Rashid Sumaila
Keyword(s):  
Climate Change ◽  
Conceptual Framework ◽  
Food Webs ◽  
Marine Food Webs ◽  
Marine Food ◽  
Contaminant Interactions

Ecological resilience of Arctic marine food webs to climate change

2019 ◽  
Vol 9 (11) ◽  
pp. 868-872 ◽  
Author(s):  
Gary P. Griffith ◽  
Haakon Hop ◽  
Mikko Vihtakari ◽  
Anette Wold ◽  
Kjersti Kalhagen ◽  
...  
Keyword(s):  
Climate Change ◽  
Food Webs ◽  
Ecological Resilience ◽  
Marine Food Webs ◽  
Marine Food

scholarly journals Climate change undermines the global functioning of marine food webs

2020 ◽  
Vol 26 (3) ◽  
pp. 1306-1318 ◽  
Author(s):  
Hubert Pontavice ◽  
Didier Gascuel ◽  
Gabriel Reygondeau ◽  
Aurore Maureaud ◽  
William W. L. Cheung
Keyword(s):  
Climate Change ◽  
Food Webs ◽  
Global Functioning ◽  
Marine Food Webs ◽  
Marine Food

scholarly journals Biomolecular Composition of Sea Ice Microalgae and Its Influence on Marine Biogeochemical Cycling and Carbon Transfer through Polar Marine Food Webs

Geosciences ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 38
Author(s):  
Rebecca Julianne Duncan ◽  
Katherina Petrou
Keyword(s):  
Climate Change ◽  
Sea Ice ◽  
Food Webs ◽  
Primary Producers ◽  
Ongoing Research ◽  
Marine Food Webs ◽  
Advantages And Disadvantages ◽  
Carbon Transfer ◽  
Marine Food ◽  
Macromolecular Composition

Microalgae growing on the underside of sea ice are key primary producers in polar marine environments. Their nutritional status, determined by their macromolecular composition, contributes to the region’s biochemistry and the unique temporal and spatial characteristics of their growth makes them essential for sustaining polar marine food webs. Here, we review the plasticity and taxonomic diversity of sea ice microalgae macromolecular composition, with a focus on how different environmental conditions influence macromolecular production and partitioning within cells and communities. The advantages and disadvantages of methodologies for assessing macromolecular composition are presented, including techniques that provide high throughput, whole macromolecular profile and/or species-specific resolution, which are particularly recommended for future studies. The directions of environmentally driven macromolecular changes are discussed, alongside anticipated consequences on nutrients supplied to the polar marine ecosystem. Given that polar regions are facing accelerated rates of environmental change, it is argued that a climate change signature will become evident in the biochemical composition of sea ice microalgal communities, highlighting the need for further research to understand the synergistic effects of multiple environmental stressors. The importance of sea ice microalgae as primary producers in polar marine ecosystems means that ongoing research into climate-change driven macromolecular phenotyping is critical to understanding the implications for the regions biochemical cycling and carbon transfer.

Stable nitrogen and carbon isotopes in sediments and biota from three tropical marine food webs: Application to chemical bioaccumulation assessment

2017 ◽  
Vol 36 (9) ◽  
pp. 2521-2532 ◽  
Author(s):  
Hui Zhang ◽  
Yun Teng ◽  
Tra Thi Thanh Doan ◽  
Yun Wei Yat ◽  
Sheot Harn Chan ◽  
...  
Keyword(s):  
Food Webs ◽  
Carbon Isotopes ◽  
Marine Food Webs ◽  
Marine Food

scholarly journals Krill: a potential vector for domoic acid in marine food webs

2002 ◽  
Vol 237 ◽  
pp. 209-216 ◽  
Author(s):  
S Bargu ◽  
CL Powell ◽  
SL Coale ◽  
M Busman ◽  
GJ Doucette ◽  
...  
Keyword(s):  
Food Webs ◽  
Domoic Acid ◽  
Potential Vector ◽  
Marine Food Webs ◽  
Marine Food

scholarly journals The origin of phagocytosis in Earth history

2020 ◽  
Vol 10 (4) ◽  
pp. 20200019 ◽  
Author(s):  
Daniel B. Mills
Keyword(s):  
Plasma Membrane ◽  
Particulate Matter ◽  
Food Webs ◽  
Host Cell ◽  
Crown Group ◽  
Cytological Evidence ◽  
Specific Process ◽  
Marine Food Webs ◽  
Bona Fide ◽  
Marine Food

Phagocytosis, or ‘cell eating’, is a eukaryote-specific process where particulate matter is engulfed via invaginations of the plasma membrane. The origin of phagocytosis has been central to discussions on eukaryogenesis for decades­, where it is argued as being either a prerequisite for, or consequence of, the acquisition of the ancestral mitochondrion. Recently, genomic and cytological evidence has increasingly supported the view that the pre-mitochondrial host cell—a bona fide archaeon branching within the ‘Asgard’ archaea—was incapable of phagocytosis and used alternative mechanisms to incorporate the alphaproteobacterial ancestor of mitochondria. Indeed, the diversity and variability of proteins associated with phagosomes across the eukaryotic tree suggest that phagocytosis, as seen in a variety of extant eukaryotes, may have evolved independently several times within the eukaryotic crown-group. Since phagocytosis is critical to the functioning of modern marine food webs (without it, there would be no microbial loop or animal life), multiple late origins of phagocytosis could help explain why many of the ecological and evolutionary innovations of the Neoproterozoic Era (e.g. the advent of eukaryotic biomineralization, the ‘Rise of Algae’ and the origin of animals) happened when they did.

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