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By Dennis K. Hubbard, Caroline S. Rogers, Jere H. Lipps, George D. Stanley Jr.

In this ebook, participants from assorted backgrounds take a primary step towards an built-in view of reefs and the importance in their contemporary decline. greater than the other earth process, coral reefs take a seat at a disciplinary crossroads. so much lately, they've got reached one other crossroads - primary alterations of their bio-physical constitution more than these of prior centuries or perhaps millennia. potent techniques to mitigate contemporary traits would require an strategy that embraces the myriad views from around the medical panorama, yet also will desire a mechanism to remodel clinical knowing into social will and political implementation.

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Extra resources for Coral Reefs at the Crossroads

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2012) to test the Proton Flux Model of calcification. There was a significant correlation between calcification and the ratio of DIC to proton concentration ([DIC] : [H+] ratio). The ratio is tightly correlated with [CO32À] and with Ωarag. Jokiel (2013) noted that correlation does not prove cause and effect, and argued that Ωarag and [CO32À] have no basic physiological meaning on coral reefs other than a correlation with the [DIC] : [H+] ratio. Comeau et al. (2013) responded by describing the type of experiments that are needed to allow further evaluation of the Proton Flux Model in relation to their model.

Excess CO32À uptake would elevate cytosolic pH while excess CaCO3 precipitation would reduce it. 2. 2 by using HCO3À as the substrate for calcification. 3. Stability. Seawater pH fluctuates substantially in a diurnal and seasonal timescale with HCO3À having a dominant and stable concentration over the entire pH range encountered by marine organisms, while [CO32À] will show extreme variation. Thus HCO3À is a much more reliable inorganic carbon source for calcification. 3 Increasing Evidence that the Ωarag Model for Coral and Coral Reefs Is Flawed Venti et al.

The empirical relationship between Ωarag and calcification rate in tropical reef-building corals has been well established (Gattuso et al. 1999; Langdon et al. 2000; Marubini et al. 2001, 2003; Ohde and Hossain 2004; Langdon and Atkinson 2005; Schneider and Erez 2006; Jokiel et al. 2008; Cohen et al. 2009). Temperate corals have a much lower rate of metabolism and skeletal growth shows less of a decrease with decreasing Ωarag (see Fig. 4 I. in Ries et al. 2009; Fig. 4 in Holcomb et al. 2010; Fig.

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