![]() The evolution of the GBR has occurred over millions of years as a result of tectonic activity, sediment movements and coral reef growth. Snapshot Great Barrier Reef Inner Shelf - Sediment resuspension - tonnes per year (t/yr) In addition, it has also been the subject of independent peer review by Dr Andy Symonds from Port and Coastal Solutions. This work was scoped in 2017 with input from research agencies and has been reviewed by Environment Managers from each port authority, QPA and technical specialists engaged by QPA. To support this work, BMT WBM have prepared a quantitative sediment budget of the entire Great Barrier Reef (GBR) and regions surrounding GBR ports. At the same time, it helps keep our ports open and trading effectively to support our economy, communities and way of life. This knowledge helps us to understand sediment dynamics in the Great Barrier Reef region and to manage port operations in a sustainable way that does not adversely affect the reef. “Understand the port sediment characteristics and risks at the major ports and how they interact and contribute to broader catchment contributions within the World Heritage Area.” Over the course of 18 months, and as part of Water Quality Action 17, NQBP has worked alongside Queensland Ports Association (QPA) on a study to: ![]() Through a series of actions, the plan brings together government, industry, Traditional Owners, researchers and the community and provides a shared pathway to the future. The Monterey Bay Aquarium Seafood Watch program's 2018 farmed clams report, starting near the bottom of page 26, describes clam dredging techniques and impacts.ġ995 literature review by Dr.The World Heritage Area is one of the best managed marine ecosystems in the world and the Reef 2050 Long Term Sustainability Plan (Reef 2050) sets out strategies to ensure this continues. Prepared by Mitchell Tarnowski, Maryland Department of Natural Resources, Fisheries Service, Shellfish Program, September, 2001. ![]() Review of the Ecological Effects of Dredging in the Cultivation and Harvest of Molluscan Shellfishīy NOAA research scientists Ron Goldberg and Renee Mercado-Allen of the Milford Lab, 2011.Ģ001 review describing an escalator dredge, which has similar properties to the hydraulic clam dredge:Ī Literature Review of The Ecological Effects of Hydraulic Escalator Dredging, Fisheries Technical Report Series, Number 47. This study found modest increases in clam recruitment following hydraulic dredging: The researchers also conducted a before-and-after-controlled experiment to look at biodiversity and benthic recovery on Connecticut clam beds. Stokesbury et al.įrom NOAA, the most complete and recent review of literature pertaining to the impacts of mechanical harvest. © 2011 John Wiley & Sons, Inc.:Įnvironmental impacts related to mechanical harvest of cultured shellfish, by Kevin D.E. The following review articles addressing the impacts of mechanical shellfish harvest are worthy of special mention:Ī chapter in the book, Shellfish Aquaculture and the Environment, First Edition. Conversely, others believe that trawling may mimic natural disturbances and stimulate benthic production, thereby enhancing fish production (DeAlteris 2000, MacKenzie 1982, Van Dolah et al. Some consider trawling to physically disrupt the bottom and harm the benthic community by increasing sedimentation and predation exposure, and reducing benthic primary production (Auster and Langton 1998, Bradstock and Gordon 1983, Brown 1989, Collie et al. Many reports and reviews have claimed little or no significant trawling impacts, while others cite devastation and destruction. It is important to understand that the impacts of huge heavy trawls operated in deep waters to capture wild fish or shellfish simply do not apply to the operation of small dredges used inshore to harvest cultured shellfish on leased bottom. One author compared the impacts of trawling with those of clear-cutting (Baulch 1999), stating that “trawling gear devastates the world’s continental shelves.” Others describe “Watery Wastelands” devastated by trawling (Levy 1998).īut in reality, the situation is more nuanced and requires an understanding of the various environments and different types of gear, and how they interact. The issue of dredging on fishing activity in general is quite inflammatory, and a great deal has been published on wild-harvest trawling impacts. Listed below are links to several articles describing the environmental impacts of mechanical harvest methods, or “dredging” in shellfish aquaculture.
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