December 12, 2024

On the daily scroll through my browser, I came across an article on the conservation efforts taking place on Lord Howe Island. About 10% of the island’s forests were cut and cleared for agriculture and another 20% were disturbed by the domestic cattle and feral sheep, goats, and pigs that were brought to the island as a marine supply stop. The remaining 70% of the island remains relatively untouched and contains a variety of plants and animals, many of which are endemic, and some of which are rare or threatened. In July 2012, Australian Environment Minister Tony Burke and the New South Wales Environment Minister Robyn Parker announced that the Australian and New South Wales governments would each contribute 50% of the estimated A$9 million cost of implementing a rodent eradication plan for the island, using an aerial deployment of poison baits. Around 230 Lord Howe woodhens (Hypotaenidia sylvestris) were captured before the rodent eradication commenced in early 2019. Following the successful eradication of the rodents, all woodhens and Lord Howe currawongs (Strepera graculina crissalis) were released across the island in late 2019 and early 2020. The recovery program has restored the woodhen’s numbers from only 20 (1970) to about 200 (2000), which is close to carrying capacity for the island
When I looked online, I found Lord Howe Island, formerly Lord Howe’s Island, is an irregularly crescent-shaped volcanic remnant in the Tasman Sea between Australia and New Zealand that is part of the Australian state of New South Wales. The island is named after the 1st Earl Howe, Richard Howe. The island is about 6.2 miles (10 km) long and between 0.19 and 1.24 miles (0.3 and 2.0 km) wide with an area of 3,600 acres (14.55 km2). Offshore environmental assets are protected by the Lord Howe Island Marine Park which extends out to three nautical miles (5.5 km) around the island and includes Ball’s Pyramid. The Commonwealth Marine Park extends from 3 to 12 nautical miles (5.5 to 22.2 km) and covers about 1,160 miles2 (3,005 km2). A 1970 environmental survey of the island reported on the island’s environmental degradation and the Lord Howe Island Board instigated an extensive biological and environmental survey in 1974 which now guides the island conservation program. The Lord Howe Island Amendment Act of 1981 proclaimed a “Permanent Park Preserve” over the north and south ends of Lord Howe Island and the island was cited under the UNESCO World Heritage List in 1982.
Pigs (Sus domesticus) and goats (Capra hircus) were released on the island in the early 1800’s. The goats destroyed shrubs and grasses used as nesting sites and the pigs ate eggs and chicks and disturbed the land by rooting for food, both causing several birds to become extinct. Black rats (Rattus rattus) were released from provisioning whaling ships in the 1840’s and mice from Norfolk Island in 1860, triggering a second wave of extinction as well as the destruction of the native phasmid and the decimation of palm fruits. Bounties were offered for rats and pig tails, and later poisoning programs have kept populations low. Stray dogs are also a threat, as they harm native birds. Introduced species that harmed Lord Howe’s native flora and fauna (i.e., feral pigs, cats, and goats) were eradicated by the early 2000’s and the restoration of the island is an ongoing process.
THOUGHTS: The exploration of the islands of the Pacific saw the introduction of domesticated animals (like pigs -) as a food source for the mariners. The feral offspring then overran indigenous species (especially birds) and threatened existing plant species. This was compounded by the unintentional spread of the black rat. The Edens found on the islands proved to be fragile ecosystems easily disturbed by human invasion. This should serve as a lesson as we venture into the fragile ecosystems we will find in the stars. Act for all. Change is coming and it starts with you.








