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Effects of Ventenata dubia removal on rangelands of northeast Wyoming
Invasive Plant Science and Management ( IF 1.1 ) Pub Date : 2021-06-11 , DOI: 10.1017/inp.2021.20
Marshall Hart , Brian A. Mealor

Ventenata [Ventenata dubia (Leers) Coss.] is one of several annual grass invaders of the western United States. Ventenata dubia is documented reducing the forage availability for livestock and wildlife as well as lowering biodiversity in the Great Basin. This species has recently spread to the Great Plains, where it could bring these impacts with it. We attempt to answer questions on whether or not conservation practices, in this case removal of V. dubia with herbicide, result in recovery of forage resources and biodiversity. We answer these questions by measuring biomass, cover, and nutrient content 1-yr posttreatment at 9 sites in Sheridan County, WY, conducted in two years. Perennial grasses have higher crude protein and total digestible nutrients than V. dubia, and removal of V. dubia resulted in a positive perennial grass response both years. Further, the differences in pattern of growth between perennial and annual species, with annual grasses quickly senescing early in the year, make perennial grasses a more dependable forage base with higher available nutrients. Interestingly, total biomass and nutrient mass did not change after V. dubia removal due to equal replacement with perennial grasses. Species richness and diversity were unaffected by removal of V. dubia. Our results suggest that managing invasive annual grasses, particularly V. dubia, in the Northern Great Plains can improve forage resources for livestock and wildlife while maintaining species diversity. Therefore, proactive monitoring and management efforts to prevent spread should be prioritized in this region.

中文翻译:

Ventenata dubia 去除对怀俄明州东北部牧场的影响

文特纳塔 [狐臭(Leers) Coss.] 是美国西部的几个年度草入侵者之一。狐臭据记载,这减少了牲畜和野生动物的草料供应,并降低了大盆地的生物多样性。这个物种最近已经扩散到大平原,在那里它可能会带来这些影响。我们试图回答有关保护措施是否存在的问题,在这种情况下,是否去除五、杜比亚与除草剂一起,导致草料资源和生物多样性的恢复。我们通过在两年内在怀俄明州谢里登县的 9 个地点测量处理后一年的生物量、覆盖度和养分含量来回答这些问题。多年生草类的粗蛋白和总可消化养分高于五、杜比亚, 并去除五、杜比亚这两年都产生了积极的多年生草反应。此外,多年生和一年生物种之间的生长模式差异,一年生草在年初迅速衰老,使多年生草成为更可靠的草料基地,具有更高的可用养分。有趣的是,总生物量和养分质量在之后没有变化五、杜比亚由于与多年生草等量的替代而被移除。物种丰富度和多样性不受去除五、怀疑。我们的研究结果表明,管理侵入性一年生草,特别是五、杜比亚,在大平原北部可以改善牲畜和野生动物的草料资源,同时保持物种多样性。因此,该地区应优先考虑预防传播的主动监测和管理工作。
更新日期:2021-06-11
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