Prescribed burning is used to reduce fire hazard in highly flammable vegetation types, including Banksia L.f. woodland that occurs on the Swan Coastal Plain (SCP), Western Australia, Australia. The 2016 census recorded well over 1.9 million people living on the SCP, which also encompasses Perth, the fourth largest city in Australia. Banksia woodland is prone to frequent ignitions that can cause extensive bushfires that consume canopy-stored banksia seeds, a critical food resource for an endangered bird, the Carnaby’s cockatoo (Calyptorynchus latirostris, Carnaby 1948). The time needed for banksias to reach maturity and maximum seed production is several years longer than the typical interval between prescribed burns. We compared prescribed burns to bushfires and unburned sites at three locations in banksia woodland to determine whether low-intensity prescribed burns affect the number of adult banksias and their seed production. Study sites were matched to the same vegetation complex, fire regime, and time-since-fire to isolate fire intensity as a variable. Headfire rates of spread and differenced normalized burn ratios indicated that prescribed burning was generally of a much lower intensity than bushfire. The percentage survival of adult banksias and their production of cones and follicles (seeds) did not decrease during the first three years following a prescribed burn. However, survival and seed production were significantly diminished followed high-intensity bushfire. Thus, carrying capacity for Carnaby’s cockatoo was unchanged by prescribed burning but decreased markedly following bushfire in banksia woodland. These results suggest that prescribed burning is markedly different from bushfire when considering appropriate fire intervals to conserve canopy habitats in fire-resilient vegetation communities. Therefore, low-intensity prescribed burning represents a viable management tool to reduce the frequency and extent of bushfire impacts on banksia woodland and Carnaby’s cockatoo.

中文翻译：

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在地中海气候地区进行规定的燃烧可以减轻丛林大火对濒临灭绝的鸟类-卡纳比的美冠鹦鹉-的重要食物来源的干扰

在高度易燃的植被类型中（包括在澳大利亚西澳大利亚州天鹅沿海平原（SCP）上发生的Banksia Lf林地），规定的燃烧可用于减少火灾隐患。2016年的人口普查记录了超过190万人居住在SCP上，其中还包括澳大利亚第四大城市珀斯。山龙眼林地容易发生频繁的点火，会引起大面积的森林大火，消耗掉林冠存储的山龙眼种子，这是濒危鸟类卡纳比的美冠鹦鹉（Calyptorynchus latirostris，Carnaby 1948）的重要食物资源。山龙眼达到成熟和最大种子生产所需的时间比规定的烧伤间隔之间的典型间隔长几年。我们将规定的烧伤与两岸林地的三个地方的林区大火和未烧的地方进行了比较，以确定低强度的规定的烧伤是否影响成年banks果的数量及其种子生产。将研究地点与相同的植被，火情和自发火灾相匹配，以将火势隔离为变量。蔓延的烈火率和不同的归一化燃烧比表明，规定的燃烧强度通常比丛林大火低得多。在规定的烧伤后的头三年中，成年banks骨的存活百分率及其产生的视锥细胞和卵泡（种子）并未降低。但是，高强度的丛林大火导致存活率和种子产量大大降低。从而，卡纳比的美冠鹦鹉的载运量在规定的燃烧条件下未变，但在山banks林地的森林大火后明显降低。这些结果表明，在考虑适当的防火间隔以保护耐火植被群落中的冠层栖息地时，规定的燃烧与丛林大火明显不同。因此，低强度的规定燃烧代表一种可行的管理工具，可以减少森林大火对河岸林地和卡纳比的美冠鹦鹉的影响频率和程度。