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首页> 外文期刊>Journal of Wildlife Management >Disturbance regimes and mountain plover habitat in shortgrass steppe: Large herbivore grazing does not substitute for prairie dog grazing or fire
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Disturbance regimes and mountain plover habitat in shortgrass steppe: Large herbivore grazing does not substitute for prairie dog grazing or fire

机译：短草草原的扰动状况和山pl栖息地：大型草食动物放牧不能替代草原犬草放牧或生火

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Restoring historical disturbance regimes to enhance habitat for grassland birds can conflict with livestock production goals and has been controversial because of uncertainty in the frequency and pattern of different disturbances prior to European settlement. We studied nesting habitat for the mountain plover (Charadrius montanus) in relation to prescribed fire, grazing by large herbivores (cattle), and grazing by black-tailed prairie dogs (Cynomys ludovicianus) in the shortgrass steppe of northeastern Colorado. Breeding mountain plovers primarily occurred on black-tailed prairie dog colonies or areas burned during the previous dormant season. Vegetation surrounding mountain plover nests and foraging locations was characterized by a fine-scale mosaic of prostrate (<4?cm tall) vegetated patches interspersed with >35% bare soil in a given square meter, with this fine-scale pattern distributed over a broad (>100-m radius) area. Mountain plovers rarely occupied grassland lacking prairie dogs or recent fire, but those that did selected sites with similar vegetation height and bare soil exposure as sites on burns and prairie dog colonies. Vegetation structure at mountain plover-occupied sites was also similar to random sites on burns and prairie dog colonies, but differed substantially from sites managed only with cattle. Intensive cattle grazing at twice the recommended stocking rate during spring (MarMay) or summer (MayOct) for 6 years produced significantly less bare soil than burns and prairie dog colonies, particularly following years with average or above-average precipitation. Thus, intensive cattle grazing did not substitute for prairie dog grazing or fire in terms of effects on vegetation structure and mountain plover habitat. Both prescribed burning and increased size and distribution of black-tailed prairie dog colonies appear to be effective and complementary means to manage for mountain plover breeding habitat in shortgrass steppe. Provision of mountain plover habitat has tradeoffs with traditional management for livestock production. Thus, managers need to clearly define desired outcomes for management to provide multiple ecosystem goods and services. (C) 2012 The Wildlife Society.
机译：恢复历史扰动制度以增加草原鸟类的栖息地可能会与畜牧生产目标发生冲突，并且由于在欧洲定居之前不同扰动的发生频率和方式尚不确定，因此一直存在争议。我们研究了山鼠（Charadrius montanus）的筑巢栖息地与规定的火，大型食草动物（牛）和黑尾土拨鼠（Cynomys ludovicianus）在科罗拉多州东北部短草草原上的放牧有关。繁殖山pl主要发生在黑尾土拨鼠种群或先前休眠季节被烧毁的地区。围绕山nest巢和觅食地点的植被的特征是，在给定的平方米内，细小规模的mosaic片（<4？cm高）植被斑块散布着> 35％的裸土，这种细密模式分布在（半径大于100米）区域。山pl很少有人在没有草原犬鼠或没有大火的草原上生活，但那些选择了植被高度和裸露土壤相似的地方作为烧伤和草原犬鼠栖息地的草原。山pl栖息地的植被结构也类似于烧伤和草原狗群的随机位置，但与仅用牛管理的位置有很大不同。在春季（3月）或夏季（5月）的6年内，以建议的放牧率的两倍放牧密集的牛所产生的裸土比烧伤和草原犬鼠的集落要少得多，尤其是在降雨量达到平均水平或高于平均水平的年份之后。因此，就对植被结构和山pl栖息地的影响而言，集约化放牧并不能替代草原犬牧或放牧。规定的焚烧以及黑尾土拨鼠种群规模的增加和分布的增加，似乎都是管理短草草原山over繁殖栖息地的有效和补充手段。提供山pl栖息地需要与传统的牲畜生产管理权衡。因此，管理者需要明确定义管理的期望结果，以提供多种生态系统的产品和服务。 （C）2012野生动物协会。

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