Biomarker evidence of macrophyte and plankton community changes in Zeekoevlei, a shallow lake in South Africa

2008 ◽  
Vol 41 (3) ◽  
pp. 507-521 ◽  
Author(s):  
Supriyo Kumar Das ◽  
Joyanto Routh ◽  
Alakendra N. Roychoudhury
Keyword(s):  
South Africa ◽  
Shallow Lake ◽  
Plankton Community ◽  
Community Changes

scholarly journals Plankton Community Changes From Warm to Cold Winters in the Oligotrophic Subtropical Ocean

2020 ◽  
Vol 7 ◽  
Author(s):  
Laia Armengol ◽  
Gara Franchy ◽  
Alicia Ojeda ◽  
Santiago Hernández-León
Keyword(s):  
Plankton Community ◽  
Community Changes

Hydrodynamics-driven plankton community in a shallow lake

2007 ◽  
Vol 43 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Luciana de Souza Cardoso ◽  
David da Motta Marques
Keyword(s):  
Shallow Lake ◽  
Plankton Community

Long-term community changes on a high-latitude coral reef in the Greater St Lucia Wetland Park, South Africa

2008 ◽  
Vol 56 (3) ◽  
pp. 493-502 ◽  
Author(s):  
Michael H. Schleyer ◽  
Alke Kruger ◽  
Louis Celliers
Keyword(s):  
South Africa ◽  
Coral Reef ◽  
High Latitude ◽  
Community Changes

Some ascidians from the southern coast of Madagascar collected during the “AtimoVatae” survey

Zootaxa ◽  
2012 ◽  
Vol 3197 (1) ◽  
pp. 1 ◽  
Author(s):  
FRANÇOISE MONNIOT
Keyword(s):  
South Africa ◽  
Indian Ocean ◽  
Coral Reefs ◽  
Plankton Community ◽  
Southern Coast ◽  
Southern Limit ◽  
Scuba Divers ◽  
Littoral Invertebrates ◽  
The Indian Ocean ◽  
The Western Pacific

Surveys of littoral invertebrates along the southern coast of Madagascar have produced the first study of ascidians in this part of the Indian Ocean. Collections were made by SCUBA divers in May and June 2010 down to 25m depth. This region is considered the southern limit for coral reefs but remains diverse biologically. Upwellings and an abundant plankton community particularly favour the abundance of ascidians in this area. Of the 39 species of non-didemnid species described here, eight are new. Ten species are common to South Africa. Other species were for the most part already known from the Mozambique Channel and a few have also been recorded in the western Pacific (either cosmopolitan or introduced).

scholarly journals The structuring role of macrophytes on plankton community composition and bacterial metabolism in a large subtropical shallow lake

2019 ◽  
Vol 31 ◽  
Author(s):  
Ng Haig They ◽  
David da Motta Marques
Keyword(s):  
Shallow Lake ◽  
Growth Efficiency ◽  
Plankton Community ◽  
Epifluorescence Microscopy ◽  
Bacterial Metabolism ◽  
Bacterial Growth Efficiency ◽  
Bacterial Respiration ◽  
Data Set ◽  
Taxonomic Groups

Abstract Aim We aimed at investigating changes in major groups of plankton (bacterioplankton, phytoplankton and zooplankton) and bacterioplankton metabolism along a transect covering a littoral, macrophyte dominated zone to a pelagic, phytoplankton dominated zone in the large subtropical shallow lake Mangueira, Rio Grande do Sul State, Brazil. Methods The 3.2 km littoral-pelagic transect (7 points) was sampled in October 2007 in the southern section of the lake. Major taxonomic groups of phytoplankton and zooplankton were counted and identified by optic microscopy. The bacterioplankton was identified by FISH (Fluorescent in situ Hybridization), and bacterial abundance, biovolume and biomass were quantified by epifluorescence microscopy. Primary and bacterial productions were measured by incorporation of radioactive bicarbonate and leucine, respectively. Bacterial respiration was measured by experiments of oxygen consumption, and an extensive data set of limnological variables were measured through standard methods. Results Sharp changes in chemical/physical variables, as well as in bacterial density, biovolume, biomass and bacterial growth efficiency occurred on average at 30% of macrophyte coverage, with most of them increasing towards pelagic zones. The composition of major groups of zooplankton, phytoplankton, bacterial morphotypes and phylotypes indicated that different planktonic assemblies live apart in these two zones. Conclusions Our results demonstrate that macrophytes are a structuring driver of the plankton community and bacterial metabolism in this large subtropical shallow lake.

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