Saltmarsh fisheries habitat restoration in Pitt Water-Orielton Lagoon

SUMMARY

This project will work to restore essential fish habitat that live in the saltmarshes of the Pitt Water-Orielton Lagoon Ramsar site. NRM South is working with project partners and landholders to restore saltmarsh habitat in Pitt Water-Orielton Lagoon and works are designed to restore natural flows and provide protection to modified saltmarsh habitat.

BACKGROUND

At Pitt Water-Orielton Lagoon historically significant saltmarsh has become degraded over the decades. This saltmarsh habitat is important for recreationally valuable fish species and our saltmarsh restoration project is working to bring benefits to fish productivity by improving fish nursery habitat.

A legacy of changing land use, land clearing and livestock grazing in and around saltmarsh at Pitt Water-Orielton Lagoon has changed landscape function. Sections of saltmarsh have become stranded from tidal inundation, altering the connectivity of fish habitat and exposing waterways to increased nutrient inputs. This has knock-on effects for many of the recreationally important fish that depend on this site, including mullet, Australian salmon, and greenback flounder.

PARTNERS

TarFish, OzFish Unlimited and the University of Tasmania

 

FUNDING

Australian Government’s Department of Agriculture, Water and the Environment – Fisheries Habitat Restoration Program

 

PROJECT DURATION

2021-2023

 

APPROACH

This project will address the following threats;

  • Stock trampling and browsing of saltmarsh communities (reduces the extent and diversity of saltmarsh)
  • Modified hydrological flows from levees and bunds (reduces inundation to saltmarsh and restricts fish access to saltmarsh habitat)
  • The lack of vegetation buffering saltmarsh communities modifies microclimate and increases the potential for weed incursion and runoff of excess nutrients and sediments from surrounding agricultural areas into saltmarsh communities
  • Resource utilization – current and potential changes to land and water management practices
  • Extraction of fish stocks through fishing activities

Project activities include:

– Removing 2 levees adjacent to selected saltmarsh communities

– Fencing saltmarsh to protect from livestock trampling and nutrient inputs

– Restoring previously cleared woody vegetation and native grasses, providing buffer plantings for the saltmarsh microclimate from agricultural activities

– Engaging and involving the local recreational fishing community in on-ground works and monitoring activities to build the capacity of recreational fishers to participate in fish habitat stewardship

– Assessing populations of recreationally important fish species and their habitat before and following restoration activities and identify future engagement and management opportunities

ACHIEVEMENTS TO DATE

LINKS AND MEDIA

RESOURCES