, 2014). Understanding changes in seagrass parameters through time and setting reference points for future analysis will be integral to our ability as seagrass scientists to provide advice on future coastal management. At local and regional scales there is an increasing need to justify the protection of marine environments, and quantifying ecosystem services is a key means of providing that justification. Although it is often quoted that seagrasses provide high levels of these ecosystem services

the data underpinning this is often geographically weak. This special issue provides three manuscripts that help to fill gaps about the importance Akt inhibitor of the seagrass ecosystem in terms of directly supporting food security and human well-being through supporting fisheries productivity

and small scale fisheries. These include a global view of coupled social–ecological systems (Cullen-Unsworth et al., 2014) and analyses of the ecosystem service values of the seagrass meadows from very different systems in the United Kingdom (Bertelli and Unsworth, 2014) and eastern Africa (de la Torre-Castro et al., 2014). Increasing global interest now also focuses on a relatively newly appreciated ecosystem service provided by seagrass; its capacity to sequester carbon. The special issue includes a review of the modeling of the carbon sequestration capacity of seagrass meadows (Macreadie et al., 2014). Climate change is a significant long-term threat to seagrass. Managing seagrasses for future resilience to climate change is about understanding current stressors and how they Proteases inhibitor may change and about knowledge of temperature and ocean chemistry including C-X-C chemokine receptor type 7 (CXCR-7) developing greater knowledge of distribution limits, understanding ecosystem recovery and defining clear physical thresholds. Research in the special issue uses modeling to predict the upper limit of Posidonia oceanica

distribution ( Vacchi et al., 2014), develops knowledge of species light needs and how those needs interact with the environment ( Yaakub et al., 2014a, Yaakub et al., 2014b and Kenworthy et al., 2014) and determines how deep water seagrasses recover from stress ( Rasheed et al., 2014). There exists increasing evidence of how climate related temperature changes may detrimentally affect seagrasses. Collier and Waycott (2014) investigate the temperatures and times which lead to plant mortality, but in addition and more worryingly for seagrass ecologists, demonstrate the synergistic effect of poor water quality. These complex and until now poorly understood interactions and the potential wider ecosystem effects are also investigated in the special issue study of how ocean acidification influences seagrass tolerance to herbivory (Garthwin et al., 2014). As editors we appreciate the effort of the seagrass research community in undertaking the research that underpins this edition.