Sounds shellfish bed study completed

A case study on considerations for restoring shellfish beds in Tōtaranui/ Queen Charlotte Sound has been completed.

The Marlborough Sounds was selected for one of two regional case studies as part of the Sustainable National Science Challenge. The case study is a collaboration between Council, Sustainable Seas, NIWA, the Marlborough Sounds Integrated Management Trust, Iwi, Fisheries New Zealand, Department of Conservation and community members.

Shellfish play an essential role in nurturing a thriving marine ecosystem Council’s Principal Coastal Scientist Oliver Wade told November’s Environment and Planning Committee meeting.

“They contribute in many ways – filtering water, recycling nutrients and chemicals, stabilizing sediments, creating complex habitats and enhancing biodiversity. They are also of cultural and economic significance,” Mr Wade said.

However, shellfish in the Marlborough Sounds face numerous stressors, including overharvesting, disruptions to the seafloor, climate change, pollution, nutrient overload, sediment accumulation, invasive species, and diseases.

“The extent of these impacts can differ significantly, from diminishing their future resilience to outright destroying their habitats. When multiple stressors occur simultaneously or over time, their effects can compound, leading to an even greater impact and diminishing the ability of shellfish to withstand future challenges,” Mr Wade said.

The report explored the key processes and broader factors involved in starting rehabilitation activities. This includes understanding cultural perspectives, setting and agreeing on goals, assessing risks and benefits, measuring success, and considering legal factors.

The insights gained from this case study promise to guide future marine restoration efforts, inspire community initiatives and help interested parties in launching their own projects.

For more information go to the Sustainable Seas Challenge website