The influence of deposit-feeding on chlorophyll-<I>a</I> degradation in coastal marine sediments

Clicks: 1
ID: 298696
2000
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal

Ranked #846 of 1,397 articles by views in journal of marine research

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 1,397 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
To determine how macrofaunal activity affects rates and mechanisms of Chlorophyll- a (Chl-a) decomposition, we measured Chl- a concentrations during laboratory incubations of surface sediment with varying abundances of a subsurface deposit-feeder, Yoldia limatula. Decomposition patterns of Chl-a in sediment cores with and without a layer of algal-enriched sediment added to the surface were compared. Decomposition rate constants, kd, were calculated from the loss of reactive Chl- a and further quantie ed using a nonsteady state, depth-dependent, reaction-diffusion model. Values of kd decreased approximately exponentially with depth and were directly proportional to the number of Yoldia present.Yoldiaincreased the kd of both natural sedimentary Chl- a and algal enriched Chl- a in the upper 2 cm by up to 5.7 3 . Surface sediment porosity, penetration depths of a conservative tracer of diffusion (Br 2 ), and oxidized metabolic substrates (e.g. Fe(III)) all increased signie cantly in the presence of Yoldia. Macrofaunal bioturbation increased the importance of suboxic degradation pathways. These experiments demonstrated that organic compounds from a single source can have a continuum of degradation rate constants as a function of biogenically determined environmental conditions (Chl- a kd , 0.0043‐ 0.20 d 2 1 ). In particular, Chl- a can have a continuum of kd values related to redox conditions, transport, and macrofauna abundance as a function of depth.
Reference Key
openalex_W1973845975 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Anitra E. Ingalls, Robert C. Aller, Cindy Lee, Ming-Yi Sun
Journal journal of marine research
Year 2000
DOI
10.1357/002224000321511052
URL
https://doi.org/10.1357/002224000321511052
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.