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Ecological Disturbance Through Patch-Burn Grazing Influences Lesser Prairie-Chicken Space Use
Journal of Wildlife Management ( IF 2.3 ) Pub Date : 2021-09-06 , DOI: 10.1002/jwmg.22118
Jonathan D. Lautenbach 1 , David A. Haukos 2 , Joseph M. Lautenbach 1 , Christian A. Hagen 3
Affiliation  

Across portions of the western Great Plains in North America, natural fire has been removed from grassland ecosystems, decreasing vegetation heterogeneity and allowing woody encroachment. The loss of fire has implications for grassland species requiring diverse vegetation patches and structure or patches that have limited occurrence in the absence of fire. The lesser prairie-chicken (Tympanuchus pallidicinctus) is a declining species of prairie-grouse that requires heterogeneous grasslands throughout its life history and fire has been removed from much of its occupied range. Patch-burn grazing is a management strategy that re-establishes the fire-grazing interaction to a grassland system, increasing heterogeneity in vegetation structure and composition. We evaluated the effects of patch-burn grazing on lesser prairie-chicken space use, habitat features, and vegetation selection during a 4-year field study from 2014–2017. Female lesser prairie-chickens selected 1- and 2-year post-fire patches during the lekking season, ≥4-year post-fire patches during the nesting season, and year-of-fire and 1-year post-fire patches during post-nesting and nonbreeding seasons. Vegetation selection during the lekking season was not similar to available vegetation in selected patches, suggesting that lesser prairie-chickens cue in on other factors during the lekking season. During the nesting season, females selected nest sites with greater visual obstruction, which was available in ≥4-year post-fire patches; during the post-nesting season, females selected sites with 15–25% bare ground, which was available in the year-of-fire, 1-year post-fire, and 2-year post-fire patches; and during the nonbreeding season they selected sites with lower visual obstruction, available in the year-of-fire and 1-year post-fire patches. Because lesser prairie-chickens selected all available time-since-fire patches during their life history, patch-burn grazing may be a viable management tool to restore and maintain lesser prairie-chicken habitat on the landscape. © 2021 The Wildlife Society.

中文翻译:

局部燃烧放牧造成的生态干扰影响较小的草原鸡空间利用

在北美西部大平原的部分地区,草原生态系统中的自然火已被清除,减少了植被异质性,并允许木本侵占。火灾的消失对需要多样化植被斑块和结构或在无火情况下发生有限的斑块的草原物种有影响。小草原鸡(Tympanuchus pallidicinctus) 是一种正在衰退的草原松鸡物种,在其整个生活史中需要异质的草原,并且火已从其大部分被占领的范围内移除。斑块式放牧是一种管理策略,可重新建立草原系统的火-放牧相互作用,增加植被结构和组成的异质性。在 2014-2017 年为期 4 年的实地研究中,我们评估了斑块烧毁放牧对小草原鸡空间利用、栖息地特征和植被选择的影响。雌性小草原鸡在舔食季节选择 1 年和 2 年的火灾后补丁,在筑巢季节选择 ≥ 4 年的火灾后补丁,以及在后期选择火灾年和火灾后 1 年补丁- 筑巢和非繁殖季节。lekking 季节的植被选择与选定斑块中的可用植被不同,这表明较小的草原鸡在 lekking 季节会提示其他因素。在筑巢季节,雌性选择视觉障碍较大的筑巢地点,在≥4年的火灾后斑块中可用;在筑巢后的季节,雌性选择有 15-25% 裸地的地点,这在火灾年份、火灾后 1 年和火灾后 2 年可用;在非繁殖季节,他们选择了视觉障碍较低的地点,可在火灾年份和火灾后 1 年的补丁中使用。因为较小的草原鸡在它们的生活史中选择了所有可用的自火灾以来的时间补丁,斑块烧毁放牧可能是一种可行的管理工具,可以恢复和维持景观中较小的草原鸡栖息地。© 2021 野生动物协会。
更新日期:2021-10-11
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