Spatial and temporal dynamics of the abundance of crustose calcareous algae on the southernmost coral reefs of the western Atlantic (Abrolhos Bank, Brazil)
| Autor: | Alex Cardoso Bastos, Rodrigo Mariath, Guilherme H. Pereira-Filho, Rodrigo L. Moura, Ronaldo B. Francini-Filho, Ricardo G. Bahia, Gilberto M. Amado-Filho, Michel B. Jesionek |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
macroalgae geography geography.geographical_feature_category Ecology 010604 marine biology & hydrobiology Ecology (disciplines) Plant Science Coral reef Aquatic Science 010603 evolutionary biology 01 natural sciences South Atlantic Abundance (ecology) reef community coral reef Calcareous algae ecology Crustose Ecology Evolution Behavior and Systematics Brazil |
| Zdroj: | Repositório Institucional da UNIFESP Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP |
| Popis: | PELD Mudancas Climaticas scientific programmes of the Brazilian National Science Agency (CNPq) Brazilian IODP Program (CAPES/MEC) P&D Program ANP/Brasoil FAPERJ Crustose calcareous algae (CCA) constitute one of the main reef builders on the Abrolhos Bank, Brazil. Once CCA taxonomy is locally understood, differences in growth-forms may be useful for the delimitation of taxa using characteristics such as the presence or absence of surface protuberances. Here, growth-forms were used to identify and quantify the most common CCA taxa on the shallow reefs (3-10 m) of the Abrolhos Bank to determine possible changes in the CCA community over a period of 10 years, and the ecological significance of CCA to local reefs was interpreted. The CCA assemblages were surveyed from 2006-2015 by using fixed photoquadrats at four sites in the inner (10-20 km from the mainland) and mid-shelf reefs (40-75 km from the mainland). The five most common CCA taxa were Pneophyllum conicum, the Lithophyllum kaiserii / Lithophyllum sp. complex, Melyvonnea erubescens, the Hydrolithon boergesenii / Porolithon onkodes complex and Peyssonelia sp. The overall mean CCA cover on the reefs was 20%. A comparison with a previous monitoring study in the same region indicated that the CCA cover nearly doubled from 2003-2008 to 2006-2015. This study reveals that the coral-killing species P. conicum dominated CCA flora on the shallow Abrolhos reefs in the last decade, and the local specific abundance of CCA slightly fluctuated over time and was species-and site-specific. The information obtained in this study contributes to the understanding of the ecology of the key calcifying components of the Abrolhos reefs and provides a useful baseline for exploring the responses of CCA to future environmental changes. Diretoria Pesquisa Cient, Inst Pesquisas, Jardim Bot Rio De Janeiro, Rua Pacheco Leao 915, BR-22460030 Rio De Janeiro, RJ, Brazil Univ Fed Rio de Janeiro, Inst Biol, BR-21941599 Rio De Janeiro, RJ, Brazil Univ Fed Espirito Santo, Dept Oceanog, Ave Fernando Ferrari 514, BR-29090600 Vitoria, ES, Brazil Univ Fed Sao Paulo, Inst Mar, Campus Baixada Santista, BR-11030400 Santos, SP, Brazil Univ Fed Paraiba, Ctr Ciencias Aplicadas & Educ, Campus 4 Litoral Norte, BR-58297000 Rio Tinto, PB, Brazil Univ Fed Sao Paulo, Inst Mar, Campus Baixada Santista, BR-11030400 Santos, SP, Brazil ANP/Brasoil: 48610.011015/2014-55 Web of Science |
| Databáze: | OpenAIRE |
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