13C/12C ratios in marine food webs of the Torres Strait, Queensland

1983 ◽  
Vol 34 (5) ◽  
pp. 707 ◽  
Author(s):  
B Fry ◽  
RS Scalan ◽  
PL Parker
Keyword(s):  
Food Webs ◽  
Food Sources ◽  
Important Food ◽  
Epiphytic Algae ◽  
Δ13c Values ◽  
Marine Food Webs ◽  
Seagrass Meadows ◽  
Marine Food ◽  
Torres Strait ◽  
Intertidal Seagrass

During a research cruise in 1979 to the area between New Guinea and northern Australia, 250 samples were collected for measurement of 13C/12C (δ13C) to analyse carbon flow in tropical marine food webs. Plants at the base of food webs could be divided into two groups on the basis of their mean δ13C values: benthic seagrasses (-8.8‰), macroalgae (-12.5‰) and epiphytic algae (-13.3‰) were enriched in 13C (had less-negative δ13C values) when compared to planktonic samples (-21.8‰). Animals collected offshore were enriched in 13C by up to 9.1‰ relative to planktonic samples and seemed to show an increasing 13C enrichment with increasing trophic level. Relative to these offshore specimens, animals collected in intertidal seagrass meadows were usually enriched in 13C by 2-8‰, indicating that 13C-enriched benthic plants are important food sources in grassflats. Unusual 13C- enriched values of -3 to -7‰ among benthic chitons, gastropods and holothurians at one grassbed site suggest that unsampled benthic microalgae are also important sources of food-web carbon in the Torres Strait.

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.

scholarly journals S trath E2E2: An r package for modelling the dynamics of marine food webs and fisheries

2020 ◽  
Author(s):  
Michael R. Heath ◽  
Douglas C. Speirs ◽  
Ian Thurlbeck ◽  
Robert J. Wilson
Keyword(s):  
Food Webs ◽  
R Package ◽  
Marine Food Webs ◽  
Marine Food

scholarly journals Cephalopods as Vectors of Harmful Algal Bloom Toxins in Marine Food Webs

Marine Drugs ◽  
2013 ◽  
Vol 11 (9) ◽  
pp. 3381-3409 ◽  
Author(s):  
Vanessa Lopes ◽  
Ana Lopes ◽  
Pedro Costa ◽  
Rui Rosa
Keyword(s):  
Food Webs ◽  
Algal Bloom ◽  
Harmful Algal Bloom ◽  
Marine Food Webs ◽  
Marine Food

Body mass-abundance relationships are robust to cascading effects in marine food webs

Oikos ◽  
2011 ◽  
Vol 120 (4) ◽  
pp. 520-528 ◽  
Author(s):  
Eoin J. O'Gorman ◽  
Mark C. Emmerson
Keyword(s):  
Food Webs ◽  
Body Mass ◽  
Cascading Effects ◽  
Marine Food Webs ◽  
Marine Food
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