Responses of a Northern Adriatic Ampelisca–Corbula community to seasonality and short-term hydrological changes in the Po river
| Autor: | Daniela Prevedelli, Valentina Grandi, Mirko Iotti, G. Montanari, Roberto Simonini, Gloria Massamba N'Siala |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
0106 biological sciences
Oceans and Seas 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Corbula Mediterranean sea Rivers Abundance (ecology) Water Movements medicine Animals Seawater 14. Life underwater Diadema River regime Ecosystem 0105 earth and related environmental sciences Population Density Analysis of Variance biology Ecology Macrozoobenthos Northern Adriatic Sea Seasonality Temporal scale 010604 marine biology & hydrobiology Biodiversity General Medicine medicine.disease biology.organism_classification Invertebrates Pollution 13. Climate action Benthic zone Environmental science Seasons Eutrophication |
| Zdroj: | Marine Environmental Research. 66:466-476 |
| ISSN: | 0141-1136 |
| DOI: | 10.1016/j.marenvres.2008.08.002 |
| Popis: | During the 20th century, increased nutrient inflow has increased the frequency and intensity of eutrophication events in the North-western Adriatic Sea. More recently, evidence of a reduction in the Po river flow and a recovery of the benthic environment were reported. We examined the role played by Po river regime and seasonality in determining the temporal pattern of macrozoobenthos variation: samples were collected from a site located 10-12km off Cesenatico during two years from October 2004 to September 2006, when the mean Po discharge remained exceptionally low. 88 taxa were found, and the community was dominated by few species: Ampelisca diadema, Lumbrineris latreillii, Corbula gibba, Aricidea claudiae, Levinsenia gracilis and Nucula nucleus account for about 80% of total abundances. The density of these species exhibited a marked seasonal variability. Moreover, the total abundance and the density of the sensitive species, A. diadema, were negatively affected by several disturbance events (hypoxic conditions, frequent storms and an anomalous winter flood) that occurred between November 2005 and March 2006. The reduction of C. gibba and the increase of A. diadema densities observed in the investigated period, and verified recently by other authors could be related to the reduction in river inputs as a consequence of climatic changes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect