{"id":26011,"date":"2026-01-24T10:15:00","date_gmt":"2026-01-24T15:15:00","guid":{"rendered":"https:\/\/www.ecoticias.com\/en\/?p=26011"},"modified":"2026-01-23T07:41:53","modified_gmt":"2026-01-23T12:41:53","slug":"alert-in-new-zealand-a-mega-harvest-of-beech-trees-the-largest-in-seven-years-will-cover-the-forests-with-billions-of-seeds-and-volunteers-fear-a-population-explosion-of-rats-a","status":"publish","type":"post","link":"https:\/\/www.ecoticias.com\/en\/alert-in-new-zealand-a-mega-harvest-of-beech-trees-the-largest-in-seven-years-will-cover-the-forests-with-billions-of-seeds-and-volunteers-fear-a-population-explosion-of-rats-a\/26011\/","title":{"rendered":"Alert in New Zealand: a \u201cmega harvest\u201d of beech trees (the largest in seven years) will cover the forests with billions of seeds… and volunteers fear a population explosion of rats and stoats that will wipe out the kiwi roroa"},"content":{"rendered":"\n

Conservation volunteers in New Zealand\u2019s South Island are scrambling to protect what could be a newly confirmed kiwi stronghold before a quiet forest event turns deadly for wildlife<\/a>. Over the coming summer, beech forests across the island are expected to produce their biggest seed crop in seven years, a \u201cmega mast<\/a>\u201d that will carpet valley floors with trillions of tiny seeds and supercharge populations of rats and stoats.<\/p>\n\n\n\n

For the great spotted kiwi, or roroa<\/a>, that seed shower is not a blessing. It is a warning siren. Stoats are already one of the bird\u2019s main predators, and every extra rat or mouse the forest can support today makes it easier for stoats to survive and switch to kiwi chicks once the seed feast is over.<\/p>\n\n\n\n

So why does a tree\u2019s seeding season matter so much to a shy, nocturnal bird most of us will never see in the wild?<\/p>\n\n\n\n

How a beech mast becomes a predator \u201cplague\u201d<\/h2>\n\n\n\n

Beech is the dominant forest type across much of Aotearoa New Zealand. In warm summers, the trees respond by flowering heavily, then dropping huge amounts of seed in what scientists call a mast year<\/a>. DOC\u2019s own monitoring shows that these masts trigger a classic domino effect. First food is everywhere, so rats and mice breed through winter instead of slowing down. Then stoats, which eat rodents, also boom.<\/p>\n\n\n\n

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Read More: What they observed over the course of 90 minutes in the branches of a tree in the midst of a storm seems straight out of a science-fiction novel: 41 ultraviolet flashes invisible to the human eye and a major unanswered mystery<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

When predator numbers spike, already stressed native species<\/a> pay the price. A rat plague during a beech mast in the late-1990s wiped out the last population of mohua, or yellowhead<\/a>, at Mount Stokes in the northern South Island. Scientists now treat that loss as a textbook example of what happens if mast events are not matched with strong predator control.<\/p>\n\n\n\n

DOC has signaled that this time it intends to act early. Thanks in part to a funding boost from New Zealand\u2019s tourism levy, the National Predator Control Programme<\/a> is planning fifteen aerial operations over about 650,000 hectares of priority South Island beech forests, on top of routine work across another large area, with a second round planned after the seed has gone. <\/p>\n\n\n\n

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