Nutrient loading and spatial-temporal dynamics of phytoplankton guilds in a Southern Italian Coastal Lagoon (Lake Alimini Grande, Otranto, Italy)
The importance of external and internal P-loading to the structural organization and dynamics of phytoplankton guilds in a Southern Italy coastal lagoon (Lake Alimini Grande) was investigated. To this end, phosphorus external loading through localized freshwater inputs was measured, P-release throug...
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Published in: | Chemistry and ecology Vol. 20; no. sup1; pp. 285 - 301 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
Published: |
Taylor & Francis
01-06-2004
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Subjects: | |
Online Access: | Get full text |
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Summary: | The importance of external and internal P-loading to the structural organization and dynamics of phytoplankton guilds in a Southern Italy coastal lagoon (Lake Alimini Grande) was investigated. To this end, phosphorus external loading through localized freshwater inputs was measured, P-release through detritus decomposition on sediments was evaluated, and phytoplankton abundance, biomass and taxonomic composition were quantified at 33 sites and 12 sampling times from September 1998 to September 1999. P-loading in the area was greater in the winter (26.5 µM P m
−2
d
−1
) than in the summer (18.4 µM P m
−2
d
−1
). In the winter, external inputs were 61.7% of the total, while in summer, internal inputs accounted for 99.8% of the total. Phytoplankton biomass was related to P inputs. In particular, the spatial distribution of phytoplankton biomass was related to external inputs in winter-spring, and to internal inputs in summer-autumn. A total of 228 phytoplankton taxa were identified of which 13 taxa accounted for more than 80% of phytoplankton abundance. The spatial and temporal dynamics of 13 taxa were related to P-availability and habitat heterogeneity. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Conference-1 ObjectType-Feature-3 content type line 23 |
ISSN: | 0275-7540 1029-0370 |
DOI: | 10.1080/02757540410001665944 |