Kennedy et al. (2012) reports on the routine monitoring of pesticides using passive sampling techniques. Pesticides have been detected along most of the inshore GBR, including the relatively pristine Cape York Region, and are reported using a PSII herbicide equivalent (PSII-HEq) index. This paper also presents a novel method

of predicting PSII herbicides from remotely sensed CDOM, providing CH5424802 mw a cost effective monitoring tool for PSII herbicides. Coral cores have been widely used to detect historical trends of pollution (e.g., McCulloch et al., 2003). Lewis et al. (2012b) continues this work by correlating present day water quality gradients with changing land use in the adjacent river catchments using trace element ratios. This work highlights the importance of site selection when using coral records to record regional environmental signals as the various ratios tested provided different environmental Bortezomib response. Fabricius et al. (2012) investigate the responses of bioindicators on inshore coral reefs of the GBR. Changes in water quality were correlated with shifts from phototrophic to heterotrophic benthic communities, and from diverse coral-dominated communities to low-diversity communities dominated by macroalgae.

Turbidity was the best predictor of biota and remains an essential parameter to monitor water quality on the GBR. Cooper and Fabricius (2012) explored the photo-acclimatisation of algal endosymbionts of scleractinian corals as a bioindicator for water quality. Changes in environmental conditions resulted in massive Porites corals becoming progressively brighter as nutrients decreased and irradiance Vildagliptin increased along a water quality gradient and suggests that coral brightness may be a simple tool to monitor changes in marine water quality. Reponses of coastal seagrasses to light limitation, e.g., due to increased turbidity, were examined at the metabolic and physiological level and showed that efforts to improve

water quality will likely be effective in improving seagrass condition ( Collier et al., 2012). A number of papers describe experimental studies of the effects of herbicides on a variety of marine micro-organisms. Shaw et al. (2012) examined the response of zooxanthellae isolated from corals to herbicides collected in a flood plume. The photosynthetic potential of the zooxanthellae declined after exposure to herbicides and was positively related to the concentration of diuron and negatively related to salinity. Magnusson et al. (2012) reports the first identification of pollution-induced community tolerance (PICT) in tropical estuarine microbial biofilms in response to chronic low-level herbicide exposures. The biofilms show a shift in species composition towards communities dominated by diatoms in response to herbicide exposure.