Methodology for studying exchanges between salt marshes and coastal marine waters

1994 ◽  
Vol 3 (1) ◽  
Author(s):  
O. Troccaz ◽  
F. Giraud ◽  
G. Bertru ◽  
J.C. Lefeuvre
Keyword(s):  
Salt Marshes ◽  
Marine Waters ◽  
Coastal Marine

scholarly journals Microbial dark carbon fixation fueled by nitrate enrichment

2021 ◽  
Author(s):  
Joseph H. Vineis ◽  
Ashley N. Bulseco ◽  
Jennifer L. Bowen
Keyword(s):  
Microbial Communities ◽  
Marine Sediments ◽  
Salt Marshes ◽  
Carbon Fixation ◽  
Niche Partitioning ◽  
Coastal Marine Sediments ◽  
Functional Relationships ◽  
Coastal Marine ◽  
Dark Carbon Fixation ◽  
The Impact

Anthropogenic nitrate amendment to coastal marine sediments can increase rates of heterotrophic mineralization and autotrophic dark carbon fixation (DCF). DCF may be favored in sediments where organic matter is biologically unavailable, leading to a microbial community supported by chemoautotrophy. Niche partitioning among DCF communities and adaptations for nitrate metabolism in coastal marine sediments remain poorly characterized, especially within salt marshes. We used genome-resolved metagenomics, phylogenetics, and comparative genomics to characterize the potential niche space, phylogenetic relationships, and adaptations important to microbial communities within nitrate enriched sediment. We found that nitrate enrichment of sediment from discrete depths between 0-25 cm supported both heterotrophs and chemoautotrophs that use sulfur oxidizing denitrification to drive the Calvin-Benson-Bassham (CBB) or reductive TCA (rTCA) DCF pathways. Phylogenetic reconstruction indicated that the nitrate enriched community represented a small fraction of the phylogenetic diversity contained in coastal marine environmental genomes, while pangenomics revealed close evolutionary and functional relationships with DCF microbes in other oligotrophic environments. These results indicate that DCF can support coastal marine microbial communities and should be carefully considered when estimating the impact of nitrate on carbon cycling in these critical habitats.

Habitat Mapping for Human Well-Being: a tool for reducing risk in disaster-prone coastal environments and human communities

2021 ◽  
pp. SP505-2021-26
Author(s):  
Yuri Oki ◽  
Hiroshi Kitazato ◽  
Toyonobu Fujii ◽  
Soichiro Yasukawa
Keyword(s):  
Salt Marshes ◽  
Scale Up ◽  
Well Being ◽  
Coastal Ecosystems ◽  
Indian Ocean Tsunami ◽  
Important Species ◽  
Coastal Marine ◽  
Coastal Species ◽  
Northeastern Japan ◽  
The Pacific

AbstractCoastal ecosystems consist of diverse habitats, such as reed beds, salt marshes, mangrove swamps, tidal flats, river deltas, seagrass fields, coral reefs, sandy/rocky-shore beaches and other habitats that harbour biodiversity. The Great East Japan Earthquake of March 2011 caused severe damage to one-third of the fishing communities along the Pacific Ocean of northeastern Japan. Coastal species, such as seagrasses, function as nursery areas for commercially important species. Coastal ecosystems provide natural infrastructure for the prevention and reduction of hazardous events, a process known as ecosystem-based disaster risk reduction (Eco-DRR). The preparation of topographic and thematic maps of coastal marine environments is essential to establish and visualise the concept of Eco-DRR. Experience gained following the Japanese earthquake, as well as examples from Indonesia and Thailand in the wake of 2004 Indian Ocean tsunami showed that Eco-DRR is an affordable and sustainable approach. Dissemination of habitat maps should be further promoted as a means to ‘Build Back Better’. To scale up and promote Eco-DRR, scientists must work in a transdisciplinary manner and engage with society through understanding the roles of ecosystems by monitoring and analysing, providing solutions and raising the awareness of community and policy makers, enabling them to better implement Eco-DRR.

On the Response of pH to Inorganic Nutrient Enrichment in Well-Mixed Coastal Marine Waters

2014 ◽  
Vol 38 (1) ◽  
pp. 232-241 ◽  
Author(s):  
Scott W. Nixon ◽  
Autumn J. Oczkowski ◽  
Michael E. Q. Pilson ◽  
Lindsey Fields ◽  
Candace A. Oviatt ◽  
...  
Keyword(s):  
Nutrient Enrichment ◽  
Inorganic Nutrient ◽  
Marine Waters ◽  
Coastal Marine
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