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Spatial and seasonal changes in benthic macrofauna from two dissipative sandy beaches in eastern Brazil)


 
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1. Title Title of document Spatial and seasonal changes in benthic macrofauna from two dissipative sandy beaches in eastern Brazil)
 
2. Creator Author's name, affiliation, country Mariane Silva Coutinho; Universidade Federal do Espírito Santo; Departamento de Oceanografia e Ecologia; Brazil
 
2. Creator Author's name, affiliation, country Angelo Fraga Bernardino; Universidade Federal do Espírito Santo; Departamento de Oceanografia e Ecologia; Brazil
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) Sandy beaches; Macrofauna; Benthic ecology; Eastern Marine Ecoregion
 
4. Description Abstract Sandy beaches are dynamic ecosystems with strong interaction of sediments, waves and tidal energy, with marked effects on benthic assemblages. Although there are numerous efforts in understanding spatial-temporal variation of benthic macrofauna on sandy beaches along the southern and southeastern Marine Ecoregions in Brazil, there is poor sampling along beaches of the Eastern Marine Ecoregion (EME). Here we examined spatial and temporal scales of variability in benthic macrofauna (>; 500 µm) through a hierarchical sampling of two dissipative sandy beaches within the EME between two seasons (winter 2011 and summer 2012). We tested the hypothesis that spatial changes (i.e., meters to hundreds of meters scales) in the structure of benthic assemblages will be more pronounced compared to the weak seasonal fluctuations at this tropical region. We found weak temporal and spatial changes in sediment grain size and beach slope, but differences in macrofaunal assemblages were evident. Contrary to our hypothesis, hierarchical sampling indicated significant changes in macrofaunal composition and density at multiple local scales (meters to hundreds of meters) and on seasonal scales. The macrofauna density and composition was directly related to changes on the sediment organic matter and grain size.
 
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/144043
 
10. Identifier Digital Object Identifier (DOI) http://dx.doi.org/10.1590/s1679-87592017115806504
 
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