Document Detail


Plant senescence: a mechanism for nutrient release in temperate agricultural wetlands.
MedLine Citation:
PMID:  16905226     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The beneficial uptake of nutrients by wetland plants is countered to some extent by nutrient release back into the aquatic environment due to vegetative die-back. This current study examined whether Leersia oryzoides, a common wetland plant, exhibits luxury uptake of nutrients from simulated farm runoff. The study also tested whether with subsequent decomposition, these nutrients are released back into the water column. When exposed to elevated (>2mg/L N and P) runoff, L. oryzoides assimilated significantly higher concentrations of nitrogen (p<0.001) and phosphorus (p<0.001) in above-ground biomass as compared to non-enriched treatments (<0.05 mg/L N and P). Subsequently, senescence of enriched above-ground biomass yielded significantly higher concentrations of phosphorus (2.19+/-0.84 mg P/L). Using L. oryzoides as our model, this study demonstrates nitrogen and phosphorus sequestration during the growing season and release of phosphorus in the winter.
Authors:
R Kröger; M M Holland; M T Moore; C M Cooper
Related Documents :
16042246 - The performance of vertical flow constructed wetland systems with special reference to ...
19195666 - Ciliate communities in a constructed mangrove wetland for wastewater treatment.
15862336 - Effect of plants and filter materials on bacteria removal in pilot-scale constructed we...
20692006 - Dynamics of sulphur compounds in horizontal sub-surface flow laboratory-scale construct...
25033216 - An endoparasitoid avoids hyperparasitism by manipulating immobile host herbivore to mod...
20687326 - The kansas city, missouri, ground-level ozone (glo) project: a community-based air poll...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-08-14
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  146     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-02-02     Completed Date:  2007-04-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  114-9     Citation Subset:  IM    
Affiliation:
Department of Biology, University of Mississippi, 220 Shoemaker Hall, University, MS 38677, USA. kroger@olemiss.edu <kroger@olemiss.edu>
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adsorption
Agriculture*
Biodegradation, Environmental
Biomass
Food*
Humic Substances
Nitrates / metabolism
Phosphorus / metabolism
Plants / growth & development,  metabolism*
Seasons*
Water Pollutants, Chemical / metabolism*
Water Pollution*
Wetlands
Chemical
Reg. No./Substance:
0/Humic Substances; 0/Nitrates; 0/Water Pollutants, Chemical; 7723-14-0/Phosphorus

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  A practical demonstration in modelling diclofenac and propranolol river water concentrations using a...
Next Document:  Nematode communities in contaminated river sediments.