AI Article Synopsis
- The study examines how various environmental factors affect coral health in Singapore's coastal waters, highlighting that water quality conditions significantly impact coral metrics like maximum quantum yield and growth rates.
- Sediment and light levels were particularly influential for certain coral species, while temperature had a more pronounced effect on branching corals.
- The findings suggest that poor water quality can enhance chlorophyll a levels and coral performance temporarily but leads to reduced growth rates, indicating the need for established water quality thresholds to protect these at-risk coral communities from climate change.
Article Abstract
Environmental drivers of coral condition (maximum quantum yield, symbiont density, chlorophyll a content and coral skeletal growth rates) were assessed in the equatorial inshore coastal waters of Singapore, where the amplitude of seasonal variation is low, but anthropogenic influence is relatively high. Water quality variables (sediments, nutrients, trace metals, temperature, light) explained between 52 and 83% of the variation in coral condition, with sediments and light availability as key drivers of foliose corals (Merulina ampliata, Pachyseris speciosa), and temperature exerting a greater influence on a branching coral (Pocillopora damicornis). Seasonal reductions in water quality led to high chlorophyll a concentrations and maximum quantum yields in corals, but low growth rates. These marginal coral communities are potentially vulnerable to climate change, hence, we propose water quality thresholds for coral growth with the aim of mitigating both local and global environmental impacts.
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| http://dx.doi.org/10.1016/j.marenvres.2015.02.002 | DOI Listing |
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