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首页> 外文期刊>Herpetologica >Effects of rangeland management on community dynamics of the herpetofauna of the tallgrass prairie
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Effects of rangeland management on community dynamics of the herpetofauna of the tallgrass prairie

机译：牧场管理对高草草原草地带动植物群落动态的影响

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The Flint Hills of Kansas and Oklahoma are the largest remaining tracts of tallgrass prairie in North America. This area has undergone major changes in land management practices in the past 30 years. Traditional season-long cattle stocking with variable burn schedules has diversified to include intensive-early cattle stocking accompanied by annual burning. To understand how different land management practices affect the herpetofauna of a tallgrass prairie, we used mark-recapture statistics to analyze herpetofaunal community dynamics. We analyzed survey data collected over a 15-year time span (1989-2003) from a rangeland site in Cowley County, KS, USA. A modified Jolly-Seber open population model, POPAN-5, was used to estimate four community parameters: probability of species loss (phi'), probability of detection (p), probability of entry (P-ent), and species richness (N). The top models included burn status as a covariate for species loss rate, while cattle stocking received moderate support as a covariate. Rates of species loss were higher during burn years (phi'=0.04, 95% Cl: 0.02 to 0.08) than nonburn years (phi'=0.00, 95% Cl: 0.00 to 0.01). Analysis of the impacts of different management practices was difficult due to confounding effects of changes in both burning and grazing. Declines in species richness tended to be steepest during a period of season-long stocking, but results were not statistically significant. Though our limited data set does not allow us to draw strong conclusions on the effects of land management on herpetofaunal populations, the markrecapture models illustrated in our study should prove to be a valuable tool in future analyses of similar data.
机译：堪萨斯州和俄克拉何马州的弗林特山是北美最大的高草草原仅存的地区。在过去的30年中，该地区的土地管理方式发生了重大变化。具有不同烧制时间表的传统的整季牲畜饲养已经多样化，包括密集的早期牲畜饲养以及每年的焚烧。为了了解不同的土地管理方式如何影响高草草原的爬山虎的动物，我们使用了标记捕获统计数据来分析爬山虎的群落动态。我们分析了在15年时间范围（1989-2003年）中从美国堪萨斯州考利县的牧场站点收集的调查数据。使用改良的Jolly-Seber开放种群模型POPAN-5来估算四个群落参数：物种丧失概率（phi'），检测概率（p），进入概率（P-ent）和物种丰富度（ N）。顶级模型包括烧伤状况作为物种损失率的协变量，而牲畜饲养量则作为协变量得到中等支持。燃烧年（phi'= 0.04，95％Cl：0.02至0.08）的物种损失率高于非燃烧年（phi'= 0.00，95％Cl：0.00至0.01）。由于燃烧和放牧变化的混杂影响，难以分析不同管理方法的影响。在整个季节的放养期间，物种丰富度的下降趋势最为明显，但结果没有统计学意义。尽管我们有限的数据集不能使我们对土地管理对人工带子种群的影响得出强有力的结论，但我们的研究中说明的商标夺取模型应被证明是将来对类似数据进行分析的有价值的工具。

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