Reis Vanessa Moura Dos, Karez Cláudia Santiago, Mariath Rodrigo, de Moraes Fernando Coreixas, de Carvalho Rodrigo Tomazetto, Brasileiro Poliana Silva, Bahia Ricardo da Gama, Lotufo Tito Monteiro da Cruz, Ramalho Laís Vieira, de Moura Rodrigo Leão, Francini-Filho Ronaldo Bastos, Pereira-Filho Guilherme Henrique, Thompson Fabiano Lopes, Bastos Alex Cardoso, Salgado Leonardo Tavares, Amado-Filho Gilberto Menezes
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
Instituto Oceanográfico, Universidade de São Paulo, São Paulo, São Paulo, Brazil.
PLoS One. 2016 Apr 27;11(4):e0154417. doi: 10.1371/journal.pone.0154417. eCollection 2016.
The abundance of reef builders, non-builders and the calcium carbonate produced by communities established in Calcification Accretion Units (CAUs) were determined in three Abrolhos Bank shallow reefs during the period from 2012 to 2014. In addition, the seawater temperature, the irradiance, and the amount and composition of the sediments were determined. The inner and outer reef arcs were compared. CAUs located on the inner reef shelf were under the influence of terrigenous sediments. On the outer reefs, the sediments were composed primarily of marine biogenic carbonates. The mean carbonate production in shallow reefs of Abrolhos was 579 ± 98 g m-2 y-1. The builder community was dominated by crustose coralline algae, while the non-builder community was dominated by turf. A marine heat wave was detected during the summer of 2013-2014, and the number of consecutive days with a temperature above or below the summer mean was positively correlated with the turf cover increase. The mean carbonate production of the shallow reefs of Abrolhos Bank was greater than the estimated carbonate production measured for artificial structures on several other shallow reefs of the world. The calcimass was higher than the non-calcareous mass, suggesting that the Abrolhos reefs are still in a positive carbonate production balance. Given that marine heat waves produce an increase of turf cover on the shallow reefs of the Abrolhos, a decrease in the cover represented by reef builders and shifting carbonate production are expected in the near future.
2012年至2014年期间，在三个阿布洛霍斯浅礁中测定了钙化增生单元（CAU）中造礁生物、非造礁生物的丰度以及群落产生的碳酸钙。此外，还测定了海水温度、辐照度以及沉积物的数量和组成。对内外礁弧进行了比较。位于内礁架上的CAU受到陆源沉积物的影响。在外礁上，沉积物主要由海洋生物源碳酸盐组成。阿布洛霍斯浅礁的平均碳酸盐产量为579±98克/平方米·年。造礁生物群落以壳状珊瑚藻为主，而非造礁生物群落以草皮为主。在2013 - 2014年夏季检测到一次海洋热浪，温度高于或低于夏季平均温度的连续天数与草皮覆盖率的增加呈正相关。阿布洛霍斯浅礁的平均碳酸盐产量高于世界上其他几个浅礁人工结构的估计碳酸盐产量。钙化物质高于非钙质物质，这表明阿布洛霍斯礁仍处于碳酸盐产量的正平衡状态。鉴于海洋热浪导致阿布洛霍斯浅礁的草皮覆盖率增加，预计在不久的将来，造礁生物的覆盖率将下降，碳酸盐产量也会发生变化。
