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Short‐term impacts of prescribed burning on Orange‐bellied Parrot (Neophema chrysogaster) food plant abundance
Ecological Management & Restoration ( IF 1.5 ) Pub Date : 2020-07-30 , DOI: 10.1111/emr.12421
Dejan Stojanovic , Teresa Neeman , Ross Crates , Shannon Troy , Robert Heinsohn

Fire has important implications for the availability of suitable types of habitat for animals. Different species vary in their responses to fire, and quantifying the responses of key habitat attributes may facilitate manipulation of fire regimes to improve conditions for species of conservation concern. The Orange‐bellied Parrot Neophema chrysogaster prefers recently burned habitat for foraging when breeding but knowledge of how fire affects this species and its habitat is limited. We implemented a 2‐year before‐after‐control‐impact (BACI) study to quantify short‐term impacts of fire on food plants and habitat features. Relative to control sites, the four food plants we monitored in the treatment area responded differently to fire: one did not recover, two reached pre‐burn abundance after 20 months and another recovered by 1 year after fire, and by 20 months was more common in treatment sites. Relative to controls, the proportion of bare earth at treatment sites increased after fire and then gradually declined, while mean vegetation height at treatment plots declined after fire and then gradually increased. Twenty months after fire, parrots foraged on abundant regeneration of the Dwarf Everlasting (Helichrysum pumilum) and fed the seeds of this species to their nestlings. Fire alters the availability of key resources needed by breeding Orange‐bellied Parrots, and ongoing manipulation of fire regimes may relieve limitation of natural foods for this species.

中文翻译:

规定燃烧对橙腹鹦鹉(Neophema chrysogaster)食品植物丰度的短期影响

火灾对提供适合的动物栖息地类型具有重要意义。不同物种对火的反应各不相同,量化栖息地关键属性的反应可能有助于操纵火势,从而改善保护物种的条件。橙腹鹦鹉Neophema chrysogaster繁殖时,他们更喜欢新近燃烧的栖息地进行觅食,但是关于火如何影响该物种及其栖息地的知识有限。我们实施了为期2年的控制前影响后(BACI)研究,以量化火灾对食用植物和栖息地特征的短期影响。相对于对照地点,我们在治疗区域中监测到的四种食用植物对火的反应不同:一种没有恢复,两种在20个月后达到燃烧前的丰度,另一种在火后1年恢复,而在20个月后更常见在治疗现场。相对于对照,火灾后处理地点的裸土比例增加,然后逐渐下降,而火灾后处理地的平均植被高度下降,然后逐渐增加。火灾二十个月后,Helichrysum pumilum),并将该物种的种子喂入雏鸟。大火改变了繁殖橙腹鹦鹉所需的关键资源的可用性,持续进行的大火管理可能会缓解该物种对天然食物的限制。
更新日期:2020-07-30
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