2009
DOI: 10.1007/s10236-008-0176-z
|View full text |Cite
|
Sign up to set email alerts
|

Deep pore water profiles reflect enhanced microbial activity towards tidal flat margins

Abstract: Microbial activity in permeable tidal flat margin sediments is enhanced by two main processes. First, organic matter is supplied by rapid sedimentation at prograding tidal flat margins. Second, surface and deep pore water advection lead to a replenishment of the dissolved organic matter and sulfate pools. Increasing microbial activity towards the low water line is reflected in sulfate and methane profiles as well as in total cell numbers, sulfate reduction rates, and remineralization products. The impact of hi… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
34
1

Year Published

2009
2009
2023
2023

Publication Types

Select...
7
1

Relationship

3
5

Authors

Journals

citations
Cited by 34 publications
(35 citation statements)
references
References 45 publications
0
34
1
Order By: Relevance
“…Inverse modeling allows to constrain parameters that can only be measured with great difficulties (Usbeck et al, 2003;Holstein and Wirtz, 2009) In this paper, we study the origin of the unusually high reactivity in subsurface sediments at the rim of a tidal flat using a modelling approach. The finding of Wilms et al (2007) and Beck et al (2009) that the microbial activity distribution departs from the standard model at two close Wadden Sea back barrier sites allows investigations regarding potential transport mechanisms for organic material (OM) to subsurface sediment, apparently bypassing or uncoupling from the standard age-reactivity correlation of OM (Middelburg, 1989). In particular, we test two hypotheses regarding the most probable transport mechanism of reactive POC to deeper tidal sediments: lateral transport by advection and burial by rapid sedimentation.…”
Section: Introductionmentioning
confidence: 92%
“…Inverse modeling allows to constrain parameters that can only be measured with great difficulties (Usbeck et al, 2003;Holstein and Wirtz, 2009) In this paper, we study the origin of the unusually high reactivity in subsurface sediments at the rim of a tidal flat using a modelling approach. The finding of Wilms et al (2007) and Beck et al (2009) that the microbial activity distribution departs from the standard model at two close Wadden Sea back barrier sites allows investigations regarding potential transport mechanisms for organic material (OM) to subsurface sediment, apparently bypassing or uncoupling from the standard age-reactivity correlation of OM (Middelburg, 1989). In particular, we test two hypotheses regarding the most probable transport mechanism of reactive POC to deeper tidal sediments: lateral transport by advection and burial by rapid sedimentation.…”
Section: Introductionmentioning
confidence: 92%
“…Highly active microbial communities extend down to several meters below seafloor (mbsf) (Beck et al, 2009(Beck et al, , 2011. Three meter long cores were recovered, which is equivalent to B5000 years.…”
Section: Site Descriptionsmentioning
confidence: 99%
“…Cell and viral counts correlate over seven orders of magnitude (r 2 ¼ 0.941, n ¼ 89, Figure 3). At tidal flats (Beck et al, 2009) and the deep seafloor, intense microbial activity supports high viral production (Danovaro et al, 2008).…”
Section: Extraction Efficiency Of Viruses In Deep Subsurface Sedimentsmentioning
confidence: 99%
See 1 more Smart Citation
“…The ISM describes transport and reaction of solid and dissolved chemical and biological species in porous aquatic media according to Eq. 1 and was verified in studies of Beck et al [7,8]. Spatial discretization is attained using finite boxes.…”
Section: Short Model Descriptionmentioning
confidence: 91%