Decadal (2006-2018) dynamics of Southwestern Atlantic’s largest turbid zone reefs
| Autor: | Gabriel O. Cardoso, Fernando C. Moraes, Ludmilla N. Falsarella, Carolina D. Teixeira, Livia Bonetti Villela, Pamela M. Chiroque-Solano, Rodrigo L. Moura, Leonardo Mitrano Neves, Alex Cardoso Bastos, Lélis A. Carlos-Júnior, Leonardo T. Salgado, Paulo S. Salomon, Matheus Oliveira Freitas, Felipe V. Ribeiro |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Aquatic Organisms Coral Marine and Aquatic Sciences 01 natural sciences Turbidity Mathematical and Statistical Techniques Materials Physics Atlantic Ocean Principal Component Analysis Multidisciplinary geography.geographical_feature_category Coral Reefs Physics Statistics Chemical Reactions Eukaryota Classical Mechanics Coral reef Plants Chemistry Oceanography Habitat Benthic zone Corals Physical Sciences Medicine Mechanical Stress Bleaching Research Article Algae Science Climate Change Materials Science Climate change Marine Biology Cyanobacteria Research and Analysis Methods 010603 evolutionary biology Dominance (ecology) Statistical Methods Reef geography Bacteria Overfishing 010604 marine biology & hydrobiology Organisms Biology and Life Sciences Thermal Stresses Multivariate Analysis Earth Sciences Reefs Environmental science Mathematics |
| Zdroj: | PLoS ONE PLoS ONE, Vol 16, Iss 2, p e0247111 (2021) |
| ISSN: | 1932-6203 |
| Popis: | Tropical reefs are declining rapidly due to climate changes and local stressors such as water quality deterioration and overfishing. The so-called marginal reefs sustain significant coral cover and growth but are dominated by fewer species adapted to suboptimal conditions to most coral species. However, the dynamics of marginal systems may diverge from that of the archetypical oligotrophic tropical reefs, and it is unclear whether they are more or less susceptible to anthropogenic stress. Here, we present the largest (100 fixed quadrats at five reefs) and longest time series (13 years) of benthic cover data for Southwestern Atlantic turbid zone reefs, covering sites under contrasting anthropogenic and oceanographic forcing. Specifically, we addressed how benthic cover changed among habitats and sites, and possible dominance-shift trends. We found less temporal variation in offshore pinnacles’ tops than on nearshore ones and, conversely, higher temporal fluctuation on offshore pinnacles’ walls than on nearshore ones. In general, the Abrolhos reefs sustained a stable coral cover and we did not record regional-level dominance shifts favoring other organisms. However, coral decline was evidenced in one reef near a dredging disposal site. Relative abundances of longer-lived reef builders showed a high level of synchrony, which indicates that their dynamics fluctuate under similar drivers. Therefore, changes on those drivers could threaten the stability of these reefs. With the intensification of thermal anomalies and land-based stressors, it is unclear whether the Abrolhos reefs will keep providing key ecosystem services. It is paramount to restrain local stressors that contributed to coral reef deterioration in the last decades, once reversal and restoration tend to become increasingly difficult as coral reefs degrade further and climate changes escalate. |
| Databáze: | OpenAIRE |
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