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Blooms of bryozoans and epibenthic diatoms in an urbanized sandy Beach (Balneário Camboriú - SC - Brazil): dynamics, possible causes and biomass characterization


 
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1. Title Title of document Blooms of bryozoans and epibenthic diatoms in an urbanized sandy Beach (Balneário Camboriú - SC - Brazil): dynamics, possible causes and biomass characterization
 
2. Creator Author's name, affiliation, country Leonardo Rubi Rörig; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Maevi Ottonelli; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Ana Gabriela Itokazu; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Marcelo Maraschin; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country João Vitor Heberle Lins; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Paulo Cesar Vergne Abreu; Universidade Federal do Rio Grande; Brazil
 
2. Creator Author's name, affiliation, country Maria Tereza Rojo de Almeida; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Fernanda Ramlov; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Marcelo D'Oca; ACQUAPLAN - Tecnologia e Consultoria Ambiental; Brazil
 
2. Creator Author's name, affiliation, country Laís Vieira Ramalho; Universidade Federal do Rio Grande; Brazil
 
2. Creator Author's name, affiliation, country Fernando Luiz Diehl; ACQUAPLAN - Tecnologia e Consultoria Ambiental; Brazil
 
2. Creator Author's name, affiliation, country Paulo Antunes Horta Júnior; Universidade de Santa Catarina; Laboratory of Phycology; Brazil
 
2. Creator Author's name, affiliation, country Jurandir Pereira Filho; Universidade do Vale do Itajaí; Laboratory of Chemical Oceanography; Brazil
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) Bioinvasions; Coastal Pollution; Sandy Shores; Benthic Ecology; Phytoplankton
 
4. Description Abstract Balneário Camboriu (SC - Brazil) is a touristic city where the disordered growth of the urban population and the implementation of coastal works without proper evaluation generated environmental impacts and affected the sanitary quality of water and sediment of Camboriu River and marine adjacent area. One of the most recent and alarming phenomena observed are the blooms of invasive bryozoans (Arboscuspis bellula and Membraniporopsis tubigera) associated with epibenthic diatoms (Amphitetras antediluviana and Biddulphia biddulphiana). Several clues associate these phenomena, started in 2003, with the excess of nutrients and organic matter in the Camboriú cove and large coastal works such as dredging, landfills and construction of jetties, leading to changes in benthic ecological structure. Being an aesthetic and environmental health problem, the concern of the scientific community and government agencies intensified as the occurrences become more frequent and persistent. This research addresses this issue through environmental and experimental studies. Samplings of the benthic material collected by boat and diving, and blooms monitoring were the environmental approach. The laboratory work included the algal isolation and culture, in addition to growth conditions assessment and chemical biomass analysis. Monitoring data showed a seasonal trend in the blooms, with more conspicuous events in warmer months. Diatoms increase in abundance in colder months and bryozoans in the warmer ones. The diatom A. antediluviana, predominant in the blooms, grew satisfactorily in laboratory cultivation, showing better growth in media with higher concentrations of silicate and phosphate. Bryozoans showed slow growth in laboratory conditions. The deposited material collected in the environment showed low concentrations of saturated fatty acids, but the high biomass suggest a possible use for biofuels production. Biomass samples dominated by bryozoans showed moderate antimicrobial activity against Klebsiella pneumoniae. The explanation for the occurrence of these blooms are still inconclusive, but there is considerable evidence that it is a synergistic effect between the high concentration of bacteria and organic debris in the water related to local pollution and the elimination of natural competitors by coastal works.
 
5. Publisher Organizing agency, location Universidade de São Paulo. Instituto Oceanográfico
 
6. Contributor Sponsor(s)
 
7. Date (YYYY-MM-DD) 2017-12-01
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://www.revistas.usp.br/bjoce/article/view/144044
 
10. Identifier Digital Object Identifier (DOI) http://dx.doi.org/10.1590/s1679-87592017116106504
 
11. Source Title; vol., no. (year) Brazilian Journal of Oceanography; Vol 65, No 4 (2017)
 
12. Language English=en en
 
13. Relation Supp. Files
 
14. Coverage Geo-spatial location, chronological period, research sample (gender, age, etc.)
 
15. Rights Copyright and permissions Copyright (c) 2018 Brazilian Journal of Oceanography