Prairie dogs as ecosystem regulators on the northern High Plains
Prairie dogs as ecosystem regulators on the northern High Plains
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草原土拨鼠是北部高原生态系统的调节者
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
A. J. Bjugstad
中科院分区：
文献类型：
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作者：
D. Uresk;A. J. Bjugstad
草原土拨鼠种群的增加，在北方高平原强调需要更多的信息，牛草原土拨鼠饲料的关系。为了获得牛草原土拨鼠饲料关系的信息，在4个生长季节的4个处理进行了评估。这些处理为：1）不放牧（草原土拨鼠被消灭，牛被排除），2）草原土拨鼠放牧，3）牛放牧，4）牛和草原土拨鼠放牧。此外，还评估了牛和草原土拨鼠利用的饲料。在所有处理的植物物种下笼，饲料利用率进行了评估，收获笼下和笼外的作物价值。结果表明，治疗之间的主要差异。草原土拨鼠处理的峰值现存量值比仅放牧处理的牛高24%。牛加草原土拨鼠比牛处理高13%，然后没有放牧，这是大约相当于2%的增加。当与仅牛处理相比时，在不放牧、牛加草原土拨鼠处理（4%）上，草显示出增加，随后在草原土拨鼠处理（-6%）上显示出减少。与牛处理相比，草原土拨鼠处理（+165%）的杂类增加，随后是无放牧（+91%），以及牛+草原土拨鼠处理（+76%）。牛和草原犬鼠的利用率在6月为37%，8月为56%。4年后，草原土拨鼠加牛处理的活跃草原土拨鼠洞穴最高，为95个/英亩，而草原土拨鼠处理为43个/英亩。现有作物价值的数据提出了草原犬鼠牛的关系，治疗和饲料利用。
The increase in prairie dog populations on the northern High Plains has emphasized the need for additional information on cattle-prairie dog forage relationships. To obtain information on cattle-prairie dog forage relationships, 4 treatments were evaluated over 4 growing seasons. These treatments were: 1) no grazing (prairie dogs eliminated and cattle excluded), 2) grazing by prairie dogs, 3) grazing by cattle and 4) grazing by cattle and prairie dogs. In addition, forage utilized by cattle and prairie dogs was assessed. Standing crop values were obtained on all treatments by plant species under cages, and forage utilization was assessed by harvesting under cages and outside cages. Results indicate major differences among treatments. Peak standing crop values on the prairie dog treatment was 24% higher when compared to the cattle only grazing treatment. Cattle plus prairie dogs was 13% higher than the cattle treatment followed by no grazing, which was about equal with a 2% increase. Grasses showed an increase on both the no grazing, cattle plus prairie dog treatments (4%) followed by a decrease on the prairie dog treatement (-6%) when compared to the cattle treatment only. Forbs increased on the prairie dog treatment (+165%) followed by no grazing (+91%), and the cattle plus prairie dog treatment (+76%) when compared to the cattle treatment. Utilization by cattle and prairie dogs was 37% in June and 56% in August. After 4 years active prairie dog burrows were highest on the prairie dog plus cattle treatment with 95/acre, while on the praire dog treatment 43/acre were present. Data on standing crop values are presented for prairie dog-cattle relationships by treatments and forage utilization.