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首页> 外文期刊>The Canadian Field-Naturalist >Grouseberry (Vaccinium scoparium Leiberg ex Coville) Fruit Production in Forest Openings in Banff National Park, Alberta
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Grouseberry (Vaccinium scoparium Leiberg ex Coville) Fruit Production in Forest Openings in Banff National Park, Alberta

机译：阿尔伯塔省班夫国家公园林木开孔中的松果（Vaccinium scoparium Leiberg ex Coville）水果生产

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Grouseberry (Vaccinium scoparium Leiberg ex Coville) is an abundant dwarf shrub in the understory of many areas of subalpine forest in Banff National Park and has the potential to produce fruit important for wildlife. However, the suppression and prevention of wildfires, which began in the early 1900s in the park, have reduced fire-dependent shrubland and open forest and increased the extent of closed, mature forest. Because canopy closure is typically associated with decreased fruit production by understory shrubs, the decline in fire disturbance may be reducing Grouseberry fruit production. To quantify this effect, we measured Grouseberry fruit production under various forest canopies at 10 sites in Banff during 2004-2012. We measured site openness by modeling photosynthetically active direct solar radiation (dPAR) adjusted for overshadowing by topography and coniferous foliage. We found a positive relation between Grouseberry fruit production and dPAR in 2006 and 2010-2012, but not in 2008 or 2009, the 2 years of lowest fruit production; data were lacking for 2004, 2005, and 2007. We also recorded high Grouseberry fruit densities beginning 5 years after fire removed the forest canopy in four prescribed burns conducted during 2001: fruit production was 3.3 to more than 20 times that in adjacent mature forests in 5 of the 6 years analyzed. This study shows the potential ecological benefits of both prescribed burns and wildfire in upper subalpine forests where Grouseberry is widespread, but fruit production is low under the forest canopy.
机译：桑use（Vaccinium scoparium Leiberg ex Coville）是班夫国家公园亚高山森林许多地区林下矮灌木丛，具有产生野生动植物重要果实的潜力。然而，自1900年代初期开始在公园中抑制和预防野火以来，减少了依赖火的灌木丛和开阔森林，并增加了封闭，成熟森林的范围。由于树冠的关闭通常与地下灌木丛导致的水果产量下降有关，因此火灾干扰的减少可能会降低松果的产量。为了量化这种影响，我们在2004年至2012年期间测量了班夫10个地点不同森林冠层下的Grouseberry水果产量。我们通过对光合作用的直接太阳辐射（dPAR）进行建模来测量站点开放度，该辐射已针对地形和针叶树的遮荫进行了调整。我们发现在2006年和2010-2012年间，Grouseberry水果的产量与dPAR之间存在正相关关系，但在2008年或2009年（水果产量最低的两年）中却没有。缺乏2004年，2005年和2007年的数据。我们还记录到2001年大火烧毁林冠后5年开始的Grouseberry果实密度较高，2001年进行了四次规定的烧伤：水果产量是相邻成熟森林的3.3倍至20倍以上分析了6年中的5年。这项研究表明，在罗汉果分布广泛但在林冠层下水果产量较低的亚高山高山森林，规定的烧伤和野火可能具有潜在的生态效益。

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