| Title | Association of riparian features and water chemistry with reed litter breakdown in a volcanic lake (Lake Vico, Italy) |
| Abstract | To assess riparian influences on lake functioning and develop simple tools for lake health monitoring, the association of remotely-sensed riparian factors and water chemistry with the breakdown rate of reed litter was examined in Lake Vico, a volcanic lake in central Italy. The decomposition rate of Phragmites australis was determined as leaf mass loss from litterbags at 6 locations during summer 2000. Water temperature, dissolved oxygen, nitrogen and phosphorus concentrations, pH, conductivity, percent organic matter in sediments and effective fetch were also assessed at each site. Riparian factors (i.e. shoreline complexity, riparian vegetation cover, and distance from shoreline) were estimated from satellite images (Landsat VII). External organic loadings largely explained spatial heterogeneity in lake metabolism. Decomposition was fastest in the northern area of the lake that drained most of the watershed, including a larger portion in wetland area. Rates correlated exponentially with soluble reactive phosphorus (SRP) concentration, and were positively associated with total-P (TP) concentration and organic matter percentage in sediments, which, in turn, were influenced by the riparian-related factors and waveexposure (fetch). A relationship existed between the index of riparian load, RL, which combined the three riparian-related factors, and both decomposition rate and SRP, suggesting that the riparian index is a promising cost-saving tool for monitoring lake function using remotely-sensed data. © 2007 Eawag, Eidgenössische Anstalt für Wasserversorgung, Abwasserreinigung und Gewässerschutz. |
| Source | Aquatic sciences (Electron. ed.) 69, pp. 503–510 |
| Keywords | Decomposition detritus water quality riparian influence Normalized Difference Vegetation Index |
| Journal | Aquatic sciences (Electron. ed.) |
| Editor | Birkhäuser, Basel, Svizzera |
| Year | 2007 |
| Type | Articolo in rivista |
| DOI | 10.1007/s00027-007-0917-y |
| Authors | Costantini M.L.; Rossi L.; Scialanca F.; Nascetti G.; Rossi D.; Sabetta L. |
| Text | 424566 2007 10.1007/s00027 007 0917 y Scopus 2 s2.0 38849164365 Decomposition detritus water quality riparian influence Normalized Difference Vegetation Index Association of riparian features and water chemistry with reed litter breakdown in a volcanic lake Lake Vico, Italy Costantini M.L.; Rossi L.; Scialanca F.; Nascetti G.; Rossi D.; Sabetta L. Department of Genetics and Molecular Biology Charles Darwin, Ecology Area, University of Rome La Sapienza, Via dei Sardi 70, I 00185 Rome, , Italy; Department of Ecology and Sustainable Economic Development, Tuscia University, Via S. Giovanni Decollato 1, I 01100 Viterbo, , Italy; Department of Earth Science, University of Rome La Sapienza, P. le A. Moro 5, I 00185 Rome, , Italy; DiSTeBa, University of Lecce, Via Monteroni, I 73100 Lecce, , Italy To assess riparian influences on lake functioning and develop simple tools for lake health monitoring, the association of remotely sensed riparian factors and water chemistry with the breakdown rate of reed litter was examined in Lake Vico, a volcanic lake in central Italy. The decomposition rate of Phragmites australis was determined as leaf mass loss from litterbags at 6 locations during summer 2000. Water temperature, dissolved oxygen, nitrogen and phosphorus concentrations, pH, conductivity, percent organic matter in sediments and effective fetch were also assessed at each site. Riparian factors i.e. shoreline complexity, riparian vegetation cover, and distance from shoreline were estimated from satellite images Landsat VII . External organic loadings largely explained spatial heterogeneity in lake metabolism. Decomposition was fastest in the northern area of the lake that drained most of the watershed, including a larger portion in wetland area. Rates correlated exponentially with soluble reactive phosphorus SRP concentration, and were positively associated with total P TP concentration and organic matter percentage in sediments, which, in turn, were influenced by the riparian related factors and waveexposure fetch . A relationship existed between the index of riparian load, RL, which combined the three riparian related factors, and both decomposition rate and SRP, suggesting that the riparian index is a promising cost saving tool for monitoring lake function using remotely sensed data. © 2007 Eawag, Eidgenossische Anstalt fur Wasserversorgung, Abwasserreinigung und Gewasserschutz. 69 Published version http //www.scopus.com/record/display.url eid=2 s2.0 38849164365 origin=inward Articolo in rivista Birkhauser 1420 9055 Aquatic sciences Electron. ed. Aquatic sciences Electron. ed. Aquat. sci. Electron. ed. Aquatic sciences. Electron. ed. AS Electron. ed. david rossi ROSSI DAVID |
