Free Content

Modeling of advective solute transport in sandy sediments inhabited by the lugworm Arenicola marina

Authors: Timmermann, Karen; Christensen, Jan H.; Banta, Gary T.

Source: Journal of Marine Research, Volume 60, Number 1, 1 January 2002 , pp. 151-169(19)

Publisher: Sears Foundation for Marine Research

Buy & download fulltext article:

Free content The full text is free.

View now:
PDF

Abstract:

Irrigation by the lugworm Arenicola marina has a major impact on solute transport and distributions in nearshore environments due to the subsurface injection of overlying water at depth (typically 15-20 cm) and the resulting advective water flow within the sediment back toward the sediment surface.

A mechanistic one-dimensional diffusion and advection model which emphasizes the injection and advective transport of solutes within the sediment not described in previous irrigation models was developed to describe irrigation by A. marina. The model was verified by comparing its results to measured pore-water tracer (Br) profiles and it is concluded that the model adequately described the experimental tracer profiles, including the characteristic subsurface peaks often observed in sediments inhabited by lugworms. There are three model output parameters, P (t),  and , which contain biological information about irrigation. P (t) is the pumping rate of A. marina [ml/h].  describes the ratio between the area of the advective transport zone (i.e. zone affected by the return advective transport of irrigation water) and the total area of the sediment core [dimensionless]. Finally,  is a measure of the increased effectively diffusive transport due to the presence of A. marina [cm2/h]. Pumping rates were estimated to 8.8-21.3 mL H2O/g/h which are within the range of reported values for A. marina. Model calculations of  were between 0.1 and 0.53, equivalent to areas of 5.5 to 29 cm2, indicating that water was more or less locally transported to the sediment surface. In all simulations  was greater than 1 indicating that diffusion-like transport was enhanced by lugworms, affecting solute transport.

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1357/002224002762341285

Publication date: January 1, 2002

More about this publication?
  • The Journal of Marine Research publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. In the area of biology, studies involving coupling between ecological and physical processes are preferred over those that report systematics. Authors benefit from thorough reviews of their manuscripts, where an attempt is made to maximize clarity. The time between submission and publication is kept to a minimum; there is no page charge.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page