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Muskrats as a bellwether of a drying delta

机译:麝香乳头作为干燥三角洲的领头羊

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摘要

Binary land/water maps of the Peace-Athabasca Delta study site in (a), 1974 and (b), 2016, showing conditions in wet and dry years, respectively. Polygons in (b) indicate sites at which genetic sampling of muskrat took place in 2015 (pink), 2016 (purple), or in both 2015 and 2016 (yellow). c The modeled total population and surveyed population density of muskrat in the delta. Agent model results are shown as the median of n = 30 realizations of the model. Modeled total population is two times the value of model output and is reported here even though the model simulates females only, based on a study of muskrat in the delta showing nearly even breeding season ratios of males to females12. Surveyed population density is estimated as the median density across all surveyed locations in a given year, with the number of locations observed each year varying from n = 10 to n = 62 sites10. Three successive periods of net population growth and decline are indicated in blue and red, respectively, and were selected for source sink mapping in Fig. 3.
机译:(a),1974年和(b),2016年的和平athabasca delta学习网站的二元土地/水地图,分别显示潮湿和干旱的情况。 (b)中的多边形表示2015年(粉红色),2016年(紫色)或2015年和2016年(黄色)发生的穆斯克族的遗传采样。 C Delta中建模的总人口和穆斯克族人口密度。代理模型结果显示为模型的n = 30的中位数。建模的总人口是模型输出的价值的两倍,并且在此报告的是,即使模型仅在斯莫尔斯在三角洲的研究中模拟了女性,表现出几乎甚至繁殖季节的男性对女性的季节比例。调查人口密度估计是在给定年份的所有调查位置的中位密度,每年观察到的位置数量从n = 10到n = 62个站点。三个连续的净群体增长和下降时期分别以蓝色和红色表示,并且被选择用于图3中的源宿映射。3。

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