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首页> 外文期刊>The Canadian Field-Naturalist >Sharp-tailed Grouse (Tympanuchus phasianellus) population dynamics and restoration of fire-dependent northern mixed-grass prairie
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Sharp-tailed Grouse (Tympanuchus phasianellus) population dynamics and restoration of fire-dependent northern mixed-grass prairie

机译：锋利的松鸡（Tympanuchus phasianellus）人口动态和恢复火灾北部混合草原大草原

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Case studies of Sharp-tailed Grouse (Tympanuchus phasianellus) population dynamics before and during re-introduction of fire to northern mixed-grass prairies that lacked fire for multiple decades are unavailable. At a 108-km2 northern mixedgrass prairie refuge in North Dakota, fire was suppressed from the early 1900s through late 1970s. Nine management units (total area 16.8 km2, 15.7% of the refuge) received initial prescribed fire treatments during 1979-1984. The mean annual density of male Sharp-tailed Grouse attending leks on these units during 1981-1985 (9.0 males/km2) was twice that on the same units during 1961-1965 (4.2 males/km2), amid the fire exclusion era; nonoverlap of 90% CIs encompassing the means suggested a significant treatment effect. However, densities of males on units managed without prescribed fire during 1961-1965 and 1981-1985 did not change between the two periods. By 1987,fire had been re-introduced to >50% of the refuge overall. Mean annual abundance (i.e., total numbers) of lekking males on the entire refuge did not differ between 1961-1965 and 1981-1985 but was significantly greater during 1989-1993 than during 1961-1965 and 1981-1985. Changes in density and abundance of lekking males coincided with fire-induced reductions in woody cover and increases in herbaceous cover. Our study illustrates the marked capacity of Sharp-tailed Grouse to respond to reductions of tree and shrub cover resulting from prescribed fire in northern mixed-grass prairie and the species' attraction to habitat disturbance in general.
机译：夏季尾巴毛茸茸（Tympanuchus phasianellus）人口动态的案例研究在重新引入火灾之前和北部混合草原缺乏多十年缺乏火灾的牵引道。在北达科他州的108公里北部混合草原草原避难所，从20世纪70年代末到20世纪70年代初，火灾受到压制。九个管理单位（总面积16.8 km2,15.7％，避难所）在1979年至1984年期间收到了初始规定的消防治疗。在1981年至1985年（9.0男性/平方公里）期间，在这些单位上参加这些单位的男性尖锐的尾巴尾巴的平均年密度是1961年至1965年（4.2男性/ km2）的两倍;占90％CIS的非植物意味着该手段提出了显着的治疗效果。但是，在1961年至1965年和1981年至1981年至1981年至1981-1985期间没有规定火灾的单位的雄性密度在两个时期之间没有改变。到1987年，Fire已被重新推出总体避难所的> 50％。在整个避难所的lekking男性的平均年度丰度（即总数）在1961年至1965年和1981-1985之间没有区别，但在1989-1993期间比1961-1965和1981-1985期间明显更大。 Lekking Males密度和丰度的变化与木质覆盖的火灾诱导减少，并增加草本覆盖物。我们的研究说明了尖锐的松鸡的标记容量，以应对树木和灌木覆盖的减少，由北方混合草原大草原的规定火灾和物种对栖息地干扰的吸引力。

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