MICROPHYTOBENTHIC BIOMASS ON A SUBTROPICAL INTERTIDAL FLAT OF PARANAGUA BAY (SOUTHERN BRAZIL): SPATIO-TEMPORAL DISTRIBUTION AND THE INFLUENCE OF ENVIRONMENTAL CONDITIONS

被引：4
|
作者：
D'Oliveira Fonseca, Alessandra Larissa [1 ]
Machado, Eunice da Costa [2 ]
Brandini, Frederico Pereira [3 ]
Brandini, Nilva [4 ]
机构：
[1] Univ Fed Santa Catarina, Ctr Filosofia & Ciencias Humanas, BR-88040970 Florianopolis, SC, Brazil
[2] Univ Fed Parana, Ctr Estudos Mar, BR-83255976 Pontal Do Parana, PR, Brazil
[3] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo, Brazil
[4] Univ Fed Fluminense, Inst Quim, Niteroi, RJ, Brazil
来源：
BRAZILIAN JOURNAL OF OCEANOGRAPHY | 2013年 / 61卷 / 02期
关键词：
Nutrients; Sediment properties; Pigment content; Benthic microalgae; ORGANIC-MATTER; COMMUNITY STRUCTURE; SEDIMENT; CLASSIFICATION; STABILIZATION; MICROALGAE; NUTRIENTS; MUDFLATS; MUDDY; SEA;
D O I：
10.1590/S1679-87592013000200001
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
Seasonal and spatial dynamics of the microphytobenthic biomass on a subtropical intertidal sand flat (25 degrees 32'S; 48 degrees 24'W) was investigated monthly from September 1995 to July 1996. Chlorophyll-a and Phaeophytin-a contents, temperature, salinity, inorganic nitrogen and phosphate pore water concentrations and sediment characteristics were assessed in the upper (HW), middle (MW) and lower (LW) sections of the flat. Microphytobenthic biomass content showed a conspicuous seasonal and spatial gradient. Higher chlorophyll-a contents were registered in the HW section of the tidal flat (from 11.78 mu g.gsed(-1) to 38.18 mu g.gsed(-1)) decreasing towards the LW section (from 6.23 mu g.gsed(-1) to 18.23 mu g.gsed(-1)). Microphytobenthic seasonality was determined mainly by turbulence of the water column, which was influenced by atmospheric events. The sediment properties and nutrient concentrations had a significant effect on the spatial and seasonal distribution of pigments on the intertidal flat.
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页码：83 / 92
页数：10
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