Taipari Roa (Elizabeth Island)

Taipari Roa (Elizabeth Island) Marine Reserve protects 613 hectares of fiord waters in Doubtful Sound (Patea), within Fiordland on the remote southwestern coast of New Zealand's South Island. ^[1] Established in 2005 as part of a network of ten Fiordland marine reserves, it is managed by the Department of Conservation and lies within Fiordland National Park and the Te Wahipounamu World Heritage Area. ^[2] Centred on the waters around Elizabeth Island in one of Fiordland's largest and most intricate fiords, the reserve protects the distinctive 'deep-water emergence' communities of the fiords, where a tannin-stained freshwater layer allows deep-sea species to live near the surface. Its remoteness and full protection make it part of one of the most pristine temperate marine systems in the world.

The reserve protects the rich and unusual marine life characteristic of inner Fiordland fiords. Sheltered, dark waters allow black coral, sea pens, sea fans and deep-water invertebrates such as brachiopods, snake stars and sponges to flourish on the rock walls at accessible depths, including the distinctive bright yellow glass sponges found in the channel beside Elizabeth Island and rarely anywhere else in the world. ^[1] Fish including blue cod, butterfish, tarakihi and trumpeter inhabit the saltier layers below the freshwater surface. New Zealand fur seals haul out on rocks within Doubtful Sound, Fiordland crested penguins (tawaki) breed along the wider coastline, and bottlenose dolphins are resident in the Doubtful Sound complex, frequently moving through the reserve's waters. The fiord also supports diverse seabird life along its many islands and inlets.

Below the surface, the fiord walls support kelp and a variety of red and brown seaweeds in the upper, lower-salinity layer, with encrusting coralline algae on the shallow rock. Deeper down, where the dark freshwater layer cuts out light, filter-feeding invertebrates rather than plants dominate the walls. Above the waterline, the reserve is enclosed by dense temperate rainforest cloaking steep slopes, dominated by southern beech, rimu and tree ferns, with mosses, ferns and epiphytes thriving in the wet climate. This rainforest sheds tannins and organic matter into the runoff, helping create the tea-coloured freshwater layer that defines the fiord's ecology.

Doubtful Sound is a large, branching glacial fiord carved by ice during past glaciations, leaving a maze of deep U-shaped troughs, islands and inlets now flooded by the sea. The surrounding mountains and the rock walls plunging into the reserve are formed largely of ancient hard crystalline rocks, including granite and gneiss, that resist erosion. Elizabeth Island and the many other islands within the sound are bedrock remnants left amid the drowned valleys. The fiord's steep submarine slopes and deep basins continue the dramatic glacial topography below water, and high rainfall delivers fresh water and sediment that sustain the reserve's stratified water column.

Fiordland has one of the wettest climates in the world, and the Doubtful Sound area receives very heavy rainfall spread across most days of the year. The maritime, temperate climate is cool year-round, with abundant cloud, mist and rapidly changing conditions, and snow on the higher surrounding peaks in winter. Mild summers and cold winters frame a landscape continually washed by rain that feeds countless waterfalls. This persistent rainfall is essential to the reserve's marine ecology, constantly renewing the buoyant tannin-stained freshwater layer over the salt water that allows black coral and other deep-water species to thrive at shallow depths.

Doubtful Sound holds a long history of Māori and European exploration. For Ngāi Tahu and earlier Māori, Fiordland and its fiords were valued for resources such as kaimoana, birds and pounamu, reached through seasonal travel along an arduous coast. Captain James Cook is associated with visits to this general region of Fiordland, and the fiords later drew sealers and whalers in the early nineteenth century. Today the area's deep cultural significance to Ngāi Tahu is recognised, and the fiords form part of land and resources addressed in Treaty of Waitangi settlements and co-management.

The Taipari Roa (Elizabeth Island) Marine Reserve was established in 2005 as one of eight new marine reserves created across Fiordland, with the network totalling ten reserves in all, following years of collaborative work by the Guardians of Fiordland's Fisheries, iwi, scientists, fishers and the community. ^[1] This network was designed to protect representative examples of Fiordland's unique fiord ecosystems while balancing customary, recreational and commercial interests through an integrated management plan. The reserve safeguards the deep-emergence communities of Doubtful Sound within a fully protected no-take area. The Department of Conservation manages it alongside the wider Fiordland Marine Management Area, with the Fiordland Marine Guardians providing ongoing community oversight.

The reserve is extremely remote and experienced almost entirely from the water. Scuba diving is the principal way to witness its black coral, sea fans and deep-emergence invertebrate communities, accessible to experienced divers visiting on charter expeditions. The sheltered, scenic waters of Doubtful Sound around Elizabeth Island offer outstanding boating, kayaking and wildlife viewing, with frequent encounters with fur seals, dolphins and seabirds. The wild, forested islands of the sound add a strong sense of natural wilderness. There are no formed visitor trails within the reserve; its attractions are the fiord environment, marine life and remoteness.

There is no road access to the inner Doubtful Sound area, and the reserve has no visitor facilities; the nearest town, Te Anau, lies some 85 km away over rugged terrain. ^[1] Access is by boat on multi-day voyages or by float plane and helicopter charter, almost always as part of organised diving, fishing or wilderness expeditions. Visitors must be self-sufficient and prepared for severe weather and isolation. No fees apply to the reserve itself, but charter and expedition operators charge for transport and services, and strict marine biosecurity rules apply to vessels entering the Fiordland fiords.

As a no-take reserve, the area gives full protection to the fragile black coral and deep-emergence communities of Doubtful Sound, where black coral colonies can be centuries old and grow extremely slowly. The Department of Conservation and the Fiordland Marine Guardians monitor marine life, water quality and the spread of invasive marine pests, which pose a serious threat to the isolated fiord ecosystems. Strict biosecurity controls on visiting vessels aim to keep pests such as the seaweed Undaria out of the fiords. Sedimentation, climate change and the cumulative effects of vessel traffic are ongoing concerns, and the reserve forms part of an integrated, community-supported approach to keeping Fiordland's waters among the most pristine on Earth.