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Community structure and assembly are determined in part by environmental heterogeneity. While reef-building corals respond negatively to warming (i.e. bleaching events) and ocean acidification (OA), the extent of present-day natural variability in pH on shallow reefs and ecological consequences for benthic assemblages is unknown. We documented high resolution temporal patterns in temperature and pH from three reefs in the central Pacific and examined how these data relate to community development and net accretion rates of early successional benthic organisms. These reefs experienced substantial diel fluctuations in temperature (0.78°C) and pH (>0.2) similar to the magnitude of 'warming' and 'acidification' expected over the next century. Where daily pH within the benthic boundary layer failed to exceed pelagic climatological seasonal lows, net accretion was slower and fleshy, non-calcifying benthic organisms dominated space. Thus, key aspects of coral reef ecosystem structure and function are presently related to natural diurnal variability in pH.

This chapter contains sections titled: The Three Revolutions Connecting Consumers and the Environment The Big Connections of Little Things A Word for Psychology Conclusion References

\"I don't think it's very safe,\" Price said, pointing to potholes, bumps and hills. \"Finish it. Don't pave half. Get the job done.\" \"We need to slow people down on this narrow, hilly road, not facilitate even faster driving,\" said Kevin Thomason, who lives near Wilmot Line. \"I've gone through hell and I don't want to see any parent or anyone go through what I have,\" she said. \"I could just sit and bawl my eyes out some days.\"

\"The purpose of the advisory board is to share opinions and help make decisions concerning the teen collection, teen programming and our Teen Zone area.\" \"It will be a place where they can do homework, play games, listen to music and enjoy their friends. There will be a computer designated just for teen use. The teen advisory board will decorate this area,\" she said. \"The Nitro library decided to have a teen advisory board because teens are our future. We need teens to become more involved in their library,\" [Jennifer Price] said.