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首页> 外文期刊>Journal of Crustacean Biology >EFFECTS OF RECREATIONAL USE ON BRANCHIOPOD EGG AND EPHIPPIA DENSITY, BLACK ROCK DESERT-HIGH ROCK CANYON EMIGRANT TRAILS NATIONAL CONSERVATION AREA, NEVADA, USA
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EFFECTS OF RECREATIONAL USE ON BRANCHIOPOD EGG AND EPHIPPIA DENSITY, BLACK ROCK DESERT-HIGH ROCK CANYON EMIGRANT TRAILS NATIONAL CONSERVATION AREA, NEVADA, USA

机译：娱乐性使用对美国内华达州黑岩沙漠-高地岩峡谷射影足迹国家保护区支足动物卵和海豚密度的影响

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摘要

Numerous plays playas occur on valley floors of endorehic basins in arid regions of the western USA. Their openness makes them attractive for hiking, vehicle travel, military, and other uses when dry. Branchiopod crustacean dormant egg banks survive in these systems and are a rich food resource for migrating birds. Brachniecta gigas Lynch, 1937, B. mackini Dexter, 1956, and Lepiduras lemmoni Holmes, 1895, and Moina cf.macrocopa (Straus, 1820) occur in the Black Rock Desert playa, Nevada, USA. We collected playa egg bank samples to determine effects of human use in three studies. We compared intact egg and ephippia density in virgin playa areas with: 1) a heavily used vehicle track, and 2) recreational camping and vehicle activity mitigated by dust abatement in Black Rock City (site of the Burning Man Festival). We also attempted to quantify changes in intact egg and ephippia density through repeated vehicle travel over a track on virgin playa. We found no observed decrease in intact egg or ephippiadensity attributed to incrementally increased vehicle travel over virgin playa, which may be attributed to strength of the playa substrate matrix. Differences in intact egg and ephippia density were substantially lower in heavily used vehicle tracks than in adjacent playa, but differences were not statistically significant. Density of intact eggs and ephippia in Black Rock City were lower following the festival, but differences were statistically significant only for eggs in camping areas and not roads. Weak effects observed on these roads may be attributed to dust abatement that maintained substrate density.
机译：在美国西部干旱地区的内陆盆地的谷底上有许多戏剧性的游乐设施。它们的开放性使其非常适合远足，车辆旅行，军事以及干燥时的其他用途。 io足类甲壳动物的休眠卵库可以在这些系统中生存，并且是迁徙鸟类的丰富食物资源。 Brachniecta gigas Lynch（1937），B。mackini Dexter（1956）和Lepiduras lemmoni Holmes（1895）和Moina cf.macrocopa（Straus，1820）产于美国内华达州的黑岩沙漠海滩。我们在三项研究中收集了普拉亚卵库样本，以确定人类使用的影响。我们比较了原始普拉亚地区的完整鸡蛋和ephephia密度与：1）频繁使用的机动车道，以及2）在黑石城（燃烧人节的地点）通过除尘减轻的休闲露营和机动车活动。我们还尝试通过在原始普拉亚上的轨道上反复行驶车辆来量化完整卵和ephippia密度的变化。我们发现未观察到完整卵或表皮密度的下降归因于原始普拉亚上车辆行驶的增加，而这可能归因于普拉亚底物基质的强度。在频繁使用的车辆行驶轨迹上，完整蛋和ephippia密度的差异明显低于相邻的普拉亚，但差异无统计学意义。节日之后，黑岩城的完整卵和ephippia的密度较低，但差异仅在露营区的卵上显着，在道路上无统计学意义。在这些道路上观察到的微弱影响可能归因于维持基质密度的除尘。

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