scholarly journals Community structure of periphytic algae in a floodplain lake: a long-term study

2014 ◽  
Vol 36 (2) ◽  
pp. 147 ◽  
Author(s):  
Luciana Carapunarla ◽  
Dirceu Baumgartner ◽  
Liliana Rodrigues
Keyword(s):  
Community Structure ◽  
Floodplain Lake ◽  
Term Study ◽  
Periphytic Algae ◽  
Long Term Study

Influence of prescribed burning on fruit production in Proteaceae

2010 ◽  
Vol 16 (1) ◽  
pp. 46 ◽  
Author(s):  
T. D. Penman ◽  
S. H. Penman
Keyword(s):  
Community Structure ◽  
Reproductive Output ◽  
Prescribed Burning ◽  
Fire Regimes ◽  
Fruit Production ◽  
Management Tool ◽  
Fire Intensity ◽  
Term Study ◽  
Long Term Study

Prescribed burning is applied worldwide as a forest management tool. It is broadly accepted that altered fire regimes can directly impact upon community structure and composition, but little is known about the indirect effects of altered fire regimes on the mechanisms that produce community-level changes such as changes to the reproductive output of individual plants, hence populations. We examined the reproductive output of four species of Proteaceae within a long term study site where disturbance histories for the last twenty years have been accurately recorded on 216 plots. Frequent fire was found to increase woody fruit production in Banksia marginata, but had no apparent effect on B. serrata, Hakea eriantha or H. sericea. Results of this study vary from a similar study which examined the effect of wildfires. The differences observed are likely to reflect the differing impacts of fire intensity on these species. Indirect changes in fruit production may result in changes in reproductive success of species which in turn may affect vegetation community structure and faunal habitat.

Functional approach based on morphology as a model of phytoplankton variability in a subtropical floodplain lake: a long-term study

Hydrobiologia ◽  
2015 ◽  
Vol 767 (1) ◽  
pp. 151-163 ◽  
Author(s):  
Jascieli Carla Bortolini ◽  
Geovani Arnhold Moresco ◽  
Aline Caroline Magro de Paula ◽  
Susicley Jati ◽  
Luzia Cleide Rodrigues
Keyword(s):  
Functional Approach ◽  
Floodplain Lake ◽  
Term Study ◽  
Long Term Study ◽  
Phytoplankton Variability

scholarly journals Caribbean-Wide, Long-Term Study of Seagrass Beds Reveals Local Variations, Shifts in Community Structure and Occasional Collapse

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e90600 ◽  
Author(s):  
Brigitta I. van Tussenbroek ◽  
Jorge Cortés ◽  
Rachel Collin ◽  
Ana C. Fonseca ◽  
Peter M. H. Gayle ◽  
...  
Keyword(s):  
Community Structure ◽  
Seagrass Beds ◽  
Term Study ◽  
Long Term Study

scholarly journals Composition and species richness phytoplankton in a subtropical floodplain lake: a long-term study

2014 ◽  
Vol 26 (3) ◽  
pp. 296-305 ◽  
Author(s):  
Jascieli Carla Bortolini ◽  
Vânia Mara Bovo-Scomparin ◽  
Aline Caroline Magro de Paula ◽  
Geovani Arnhold Moresco ◽  
Larissa Mozini Reis ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Species Richness ◽  
Main Channel ◽  
Floodplain Lake ◽  
Term Study ◽  
Long Term Study ◽  
Total Species Richness ◽  
High Contribution ◽  
Total Species

AIM: Phytoplankton species diversity in floodplain lakes is influenced by different conditions imposed by the hydrosedimentological regime of the main channel. This study evaluated the predictors of composition and species richness phytoplankton in the long-term scale, in a floodplain lake directly connected to the Paraná River. We hypothesized that species richness of the floodplain lake is directly related to the degree of connectivity with the main channel. METHODS: Quarterly samplings were conducted between February 2000 and March 2013 (except in 2001 and 2003), under the water surface of the pelagic zone of the lake. Data were analyzed with Spearman correlation, PCA, DCA, ANOVA and regression analysis. RESULTS: We identified 397 taxa with high contribution of rare species (72%). Chlorophyceans and diatoms were the most frequent groups. There was a trend of increasing of diatoms and decrease of cyanobacteria. The DCA showed differences in phytoplankton composition. The highest mean richness values were found in years with high number of days under potamophase. Significant differences between years were detected for total species richness and first axis of DCA. Regression analysis indicated that the predictors of species richness were Zeu and Zmax. CONCLUSION: The species richness phytoplankton of the floodplain lake is directly related to the level of connectivity with the main channel.

Water level as the main driver of the alternation between a free-floating plant and a phytoplankton dominated state: a long-term study in a floodplain lake

2010 ◽  
Vol 73 (2) ◽  
pp. 275-287 ◽  
Author(s):  
Inés O’Farrell ◽  
Irina Izaguirre ◽  
Griselda Chaparro ◽  
Fernando Unrein ◽  
Rodrigo Sinistro ◽  
...  
Keyword(s):  
Water Level ◽  
Floodplain Lake ◽  
Term Study ◽  
Long Term Study ◽  
Main Driver ◽  
Floating Plant
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