Restoring shellfish reefs: Global guidelines for practitioners and scientists

Widespread global declines in shellfish reefs (ecosystem-forming bivalves such as oysters and mussels) have led to growing interest in their restoration and protection. With restoration projects now occurring on four continents and in at least seven countries, global restoration guidelines for these ecosystems have been developed based on experience over the past two decades. The following key elements of the guidelines are outlined: (a) the case for shellfish reef resto- ration and securing financial resources; (b) planning, feasibility, and goal set- ting; (c) biosecurity and permitting; (d) restoration in practice; (e) scaling up from pilot to larger scale restoration, (f) monitoring, (g) restoration beyond oyster reefs (specifically mussels), and (h) successful communication for shell- fish reef restoration projects

Social Factors Key to Landscape-Scale Coastal Restoration: Lessons Learned from Three U.S. Case Studies

In the United States, extensive investments have been made to restore the ecological function and services of coastal marine habitats. Despite a growing body of science supporting coastal restoration, few studies have addressed the suite of societally enabling conditions that helped facilitate successful restoration and recovery efforts that occurred at meaningful ecological (i.e., ecosystem) scales, and where restoration efforts were sustained for longer (i.e., several years to decades) periods. Here, we examined three case studies involving large-scale and long-term restoration efforts including the seagrass restoration effort in Tampa Bay, Florida, the oyster restoration effort in the Chesapeake Bay in Maryland and Virginia, and the tidal marsh restoration effort in San Francisco Bay, California. The ecological systems and the specifics of the ecological restoration were not the focus of our study. Rather, we focused on the underlying social and political contexts of each case study and found common themes of the factors of restoration which appear to be important for maintaining support for large-scale restoration efforts. Four critical elements for sustaining public and/or political support for large-scale restoration include: (1) resources should be invested in building public support prior to significant investments into ecological restoration; (2) building political support provides a level of significance to the recovery planning efforts and creates motivation to set and achieve meaningful recovery goals; (3) recovery plans need to be science-based with clear, measurable goals that resonate with the public; and (4) the accountability of progress toward reaching goals needs to be communicated frequently and in a way that the general public comprehends. These conclusions may help other communities move away from repetitive, single, and seemingly unconnected restoration projects towards more large-scale, bigger impact, and coordinated restoration efforts

Can Bivalve Habitat Restoration Improve Degraded Estuaries?

Bivalve habitats were once a dominant ecosystem in temperate and subtropical estuaries worldwide. While bivalve habitats are greatly reduced from their former abundance, remnant, and restored populations have been shown to provide a suite of important ecosystems services including improving water quality, coastal protection, and providing fisheries nursery habitat, in addition to providing a direct food value. Although it is unlikely that bivalve habitats can be brought back to their former abundance in most locations, bivalve restoration has been shown to be possible at large scale if the drivers of decline have been addressed. Restoring bivalve habitats can improve the health of estuaries, but restoration activities need to be supplemented with improved management practices, including in the surrounding catchments. Taking an estuary-wide approach to restoration, with bivalve habitat restoration complementing the restoration of other habitat types such as seagrasses, salt marshes, and mangroves is likely to yield both greater ecosystem benefits and may result in positive feedbacks resulting in greater restoration success of complimentary habitats. Motivation for bivalve and other coastal habitat restoration has moved beyond simply restoring an imperiled ecosystem and its biodiversity, to restoring food security, local employment, green engineering, shoreline protection, and nutrient trading. In the future it is likely that innovative engineering solutions will improve the success and value of bivalve habitat restoration. In addition to restoring natural bivalve habitats and the benefits that they bring to estuaries and the people who depend on them, novel solutions to improving estuary health and food security should be considered. There are likely to be benefits from using bivalve aquaculture as a tool for ecosystem modification (e.g., harnessing the filtering power of bivalves at high densities to improve local water quality) and creating green engineering solutions that include living elements such as bivalves to protect shorelines. © 2019 Copyrigh

Narrative assessment for cantonese-speaking children

Background: This study examined the narrative skills of Cantonese-speaking school-age children to fill a need for a normative language test for school-age children. Purpose: To provide a benchmark of the narrative skills of Cantonese-speaking children; to identify which of the microstructure components was the best predictor of age; and to determine the diagnostic accuracy of the test components. Method and Procedure: Data were collected from 1,120 Cantonese-speaking children between the ages of 4;10 (years;months) and 12;01, using a story-retell of a 24-frame picture series. Four narrative components (syntactic complexity, semantic score, referencing, and connective use) were measured. Outcomes and Results: Each measure reflected significant age-related differences in narrative ability. Regression analyses revealed that vocabulary and syntactic complexity were the best predictors of grade. All measures showed high sensitivity (86%–94%) but relatively low specificity (60%–90%) and modest likelihood ratio (LR) values: LR+ (2.15–9.42) and LR– (0.07–0.34).Conclusion and Implications: Narrative assessment can be standardized to be a reliable and valid instrument to assist in the identification of children with language impairment. Syntactic complexity is not only a strong predictor of grade but was also particularly vulnerable in Cantonese-speaking children with specific language impairment. Further diagnostic research using narrative analysis is warranted