Southeast Australia temperate forests

The Chatham Island temperate forests cover the remote Chatham Islands archipelago, which lies roughly 800 kilometers east of New Zealand's South Island in the Pacific Ocean and includes the two largest islands, Chatham and Pitt. Isolated for well over a million years, the islands were originally cloaked in relatively low-stature forest interwoven with scrubby heathland and rush swamp, where tree ferns, orchids, and Nikau palms (Rhopalostylis sapida) thrive in a humid, peaty understory; conspicuously, the podocarps and southern beeches typical of mainland New Zealand are absent. The climate is oceanic and windswept, with a narrow temperature range, frequent rain, and constant exposure to Southern Ocean storms. The flora is strikingly distinct, with around fifty endemic plant species, and the ecoregion's flagship is the Chatham Island black robin (Petroica traversi), famously brought back from just a handful of surviving birds, though invasive mammals and past habitat clearance keep much of the native vegetation under pressure. For gardeners, the islands are the wild home of several prized ornamentals, including the Chatham Islands forget-me-not (Myosotidium hortensia) and tree daisies of the genus Olearia.

The Eastern Australian temperate forests cover the southeastern Australian wet-eucalypt forest belt - from coastal southeast Queensland through New South Wales (the Great Dividing Range east slopes), eastern Victoria, and the immediately adjacent inland tablelands. Mountain ash (Eucalyptus regnans), messmate, manna gum, and brown stringybark anchor the wet-forest canopies, with tree ferns, sassafras, and southern beech in the understory of the wettest gullies. Sydney + Newcastle + Wollongong + Melbourne all sit at or near the coastal edge of this ecoregion.

The Fiordland temperate forests occupy the rugged southwest corner of New Zealand's South Island, a remote landscape largely protected within Fiordland National Park and the Te Wahipounamu South West New Zealand World Heritage Area. Southern beeches (Nothofagus) dominate much of the forest, with silver beech (Nothofagus menziesii) clothing the fiords and red beech (Nothofagus fusca) filling inland valleys, alongside tall podocarps such as rimu, totara, and miro and an understory rich in tree ferns, mosses, and shrubs. The climate is wet and cool-summered, with rainfall that climbs steeply from drier eastern areas to extraordinarily high totals near the western fiords, holding the treeline below about 1,000 meters despite the region's mid-latitude position. Isolation has produced some of the highest levels of endemism of any temperate or alpine area on Earth, with nearly 700 higher plants largely unique to the ecoregion and emblematic birds including the takahe, the alpine kea, the kakapo, and the southern brown kiwi. Gardeners may recognize natives of this region's open alpine zones, where Chionochloa snow tussocks form extensive herbfields above the beech line.

The Nelson Coast temperate forests cover the top of New Zealand's South Island, spanning the Tasman and West Coast regions across the flanks of the Paparoa Range and neighbouring mountains. Southern beech (Nothofagus) dominates the drier eastern ridges, while podocarp rainforests in the wetter west carry northern rata (Metrosideros robusta), karaka (Corynocarpus laevigatus), and the nikau palm (Rhopalostylis sapida). The climate is temperate and maritime, with high rainfall on the west-facing slopes giving way to a more sheltered, drier eastern side fringed by golden sand beaches. Despite its modest size, the region holds about half of New Zealand's roughly 2,450 plant species and shelters the great spotted kiwi, with much of it protected within Kahurangi, Paparoa, and Abel Tasman national parks. For gardeners, several signature natives here, including the nikau palm, northern rata, and karaka, are valued ornamentals in suitably mild, moist climates.

The New Zealand North Island temperate forests cover the warm-temperate to subtropical native forest of the North Island - historically dominated by kauri in the northern half, podocarp-broadleaf forest (rimu, totara, kahikatea, with broadleaf rata and tawa) across the central and southern reaches. Less than 25% of the original native forest remains; surviving fragments are heavily managed against introduced mammalian browsers (possum, deer, goat).

The New Zealand South Island temperate forests (also mapped as the Southland temperate forests) cover the southernmost lowlands and adjacent highlands of New Zealand's South Island, spanning the Otago and Southland regions and including The Catlins, the Takitimu Mountains, and the Longwood Range. Original cover was a mix of broadleaf trees and ancient podocarp conifers, with kahikatea (Dacrycarpus dacrydioides) common in swampy ground and rimu (Dacrydium cupressinum) and totara (Podocarpus totara) on drier sites, while southern beech (Nothofagus, including silver beech) dominated higher inland slopes; red tussock grass (Chionochloa rubra) prevailed in open ground and expanded as forest was cleared. These podocarp and beech communities are a living legacy of the Gondwana supercontinent, reflecting New Zealand's long isolation. Most of the original forest has been lost, and remaining blocks are now safeguarded by reserves such as Catlins Conservation Park, though introduced predators including ship rats, stoats, and possums continue to threaten native birds like the yellowhead (mohua) and the flagship tui.