Headwaters to oceans: Ecological and biogeochemical contrasts across the aquatic continuum

Xenopoulos, Marguerite A.; Downing, John A.; Kumar, M. Dileep; Menden‐Deuer, Susanne; Voß, Maren

doi:10.1002/lno.10721

Cited by 69 publications

(42 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Results of a sensitivity analyses of a reactive transport model for a site in the coastal zone of the Bothnian Sea illustrating the role of salinity in controlling P burial in the region (Lenstra et al 2018) along the aquatic continuum from land to sea (Xenopoulos et al 2017).…”

Section: Organic Matter In the Coastal Environmentmentioning

confidence: 99%

Factors regulating the coastal nutrient filter in the Baltic Sea

Carstensen

Conley

Almroth‐Rosell³

et al. 2019

Ambio

Self Cite

View full text Add to dashboard Cite

The coastal zone of the Baltic Sea is diverse with strong regional differences in the physico-chemical setting. This diversity is also reflected in the importance of different biogeochemical processes altering nutrient and organic matter fluxes on the passage from land to sea. This review investigates the most important processes for removal of nutrients and organic matter, and the factors that regulate the efficiency of the coastal filter. Nitrogen removal through denitrification is high in lagoons receiving large inputs of nitrate and organic matter. Phosphorus burial is high in archipelagos with substantial sedimentation, but the stability of different burial forms varies across the Baltic Sea. Organic matter processes are tightly linked to the nitrogen and phosphorus cycles. Moreover, these processes are strongly modulated depending on composition of vegetation and fauna. Managing coastal ecosystems to improve the effectiveness of the coastal filter can reduce eutrophication in the open Baltic Sea.

show abstract

Section: Organic Matter In the Coastal Environmentmentioning

confidence: 99%

Factors regulating the coastal nutrient filter in the Baltic Sea

Carstensen

Conley

Almroth‐Rosell³

et al. 2019

Ambio

Self Cite

View full text Add to dashboard Cite

show abstract

“…TeOM is difficult to degrade (i.e. recalcitrant), being normally processed in rivers by microorganisms, stimulating its conversion to carbon dioxide [ 2 – 4 ]. Therefore, riverine microbiomes should have evolved metabolisms capable of degrading TeOM.…”

Section: Introductionmentioning

confidence: 99%

Uncovering the genomic potential of the Amazon River microbiome to degrade rainforest organic matter

Júnior

Sarmento

Miranda³

et al. 2020

Microbiome

View full text Add to dashboard Cite

Background The Amazon River is one of the largest in the world and receives huge amounts of terrestrial organic matter (TeOM) from the surrounding rainforest. Despite this TeOM is typically recalcitrant (i.e. resistant to degradation), only a small fraction of it reaches the ocean, pointing to a substantial TeOM degradation by the river microbiome. Yet, microbial genes involved in TeOM degradation in the Amazon River were barely known. Here, we examined the Amazon River microbiome by analysing 106 metagenomes from 30 sampling points distributed along the river. Results We constructed the Amazon River basin Microbial non-redundant Gene Catalogue (AMnrGC) that includes ~ 3.7 million non-redundant genes, affiliating mostly to bacteria. We found that the Amazon River microbiome contains a substantial gene-novelty compared to other relevant known environments (rivers and rainforest soil). Genes encoding for proteins potentially involved in lignin degradation pathways were correlated to tripartite tricarboxylates transporters and hemicellulose degradation machinery, pointing to a possible priming effect. Based on this, we propose a model on how the degradation of recalcitrant TeOM could be modulated by labile compounds in the Amazon River waters. Our results also suggest changes of the microbial community and its genomic potential along the river course. Conclusions Our work contributes to expand significantly our comprehension of the world’s largest river microbiome and its potential metabolism related to TeOM degradation. Furthermore, the produced gene catalogue (AMnrGC) represents an important resource for future research in tropical rivers.

show abstract

“…TeOM is typically difficult to degrade (i.e. recalcitrant), being normally processed in rivers by microorganisms, stimulating its conversion to carbon dioxide [2][3][4]. Therefore, riverine microbiomes should have evolved metabolisms capable of degrading TeOM.…”

Section: Introductionmentioning

confidence: 99%

Uncovering the genomic potential of the Amazon River microbiome to degrade rainforest organic matter

Júnior

Sarmento

Miranda

et al. 2020

Preprint

View full text Add to dashboard Cite

Background The Amazon River is one of the largest in the world and receives huge amounts of terrestrial organic matter (TeOM) from the surrounding rainforest. Despite this TeOM is typically recalcitrant (i.e. resistant to degradation), only a small fraction of it reaches the ocean, pointing to a substantial TeOM degradation by the river microbiome. Yet, microbial genes involved in TeOM degradation in the Amazon River were barely known. Here, we examined the Amazon River microbiome by analyzing 106 metagenomes from 30 sampling points distributed along the river.Results We constructed the Amazon River basin Microbial non-redundant Gene Catalogue (AMnrGC) that includes ~ 3.7 million non-redundant genes, affiliating mostly to bacteria. We found that the Amazon River microbiome contains a substantial gene-novelty compared to other relevant known environments (rivers and rainforest soil). Genes encoding for proteins potentially involved in lignin degradation pathways were correlated to tripartite tricarboxylates transporters and hemicellulose degradation machinery, pointing to a possible priming effect. Based on this, we propose a model on how the degradation of recalcitrant TeOM could be modulated by labile compounds in the Amazon River waters. Our results also suggest changes of the microbial community and its genomic potential along the river course.Conclusions Our work contributes to expand significantly our comprehension of the world’s largest river microbiome and its potential metabolism related to TeOM degradation. Furthermore, the produced gene catalogue (AMnrGC) represents an important resource for future research in tropical rivers.

show abstract

Headwaters to oceans: Ecological and biogeochemical contrasts across the aquatic continuum

Cited by 69 publications

References 90 publications

Factors regulating the coastal nutrient filter in the Baltic Sea

Factors regulating the coastal nutrient filter in the Baltic Sea

Uncovering the genomic potential of the Amazon River microbiome to degrade rainforest organic matter

Uncovering the genomic potential of the Amazon River microbiome to degrade rainforest organic matter

Contact Info

Product

Resources

About