Human-dominated land cover corresponds to spatial variation in Mourning Dove (Zenaida macroura) reproductive output across the United States

IF 2.6 2区 生物学 Q1 ORNITHOLOGY
Condor Pub Date : 2020-03-11 DOI:10.1093/condor/duaa003
David J. Muñoz, David E. Miller
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引用次数: 2

Abstract

ABSTRACT Studies examining impacts of land cover typically focus on abundance, distribution, and/or community richness, overlooking underlying demographic processes such as survival or reproduction. Here, we present findings from a unique dataset that allowed us to measure the relationship between land cover and reproductive output across the distribution of the Mourning Dove (Zenaida macroura). We used hunter-derived, Mourning Dove wing data across 1,271 counties in the United States from 2008 to 2014 to estimate spatially explicit age ratios (juveniles: adults), an index of local reproductive output. We also used raster imagery data to estimate relationships between reproductive output and land cover and crop cover. We found that low reproductive output occurs in regions where Mourning Dove declines have been steepest. Our findings reveal that impacts of land cover vary geographically, but even at a coarse resolution, small changes in the relative proportion of human-dominated landscapes can have a significant impact on the reproductive output of this generalist species. Maize and soybean systems correlate with up to a 57% reduction in Mourning Dove reproductive output in the eastern United States. In the western United States, developed areas correlate with a 41% increase in reproductive output. Across the United States, native habitats had neutral or negative relationships with age ratios. Our study contributes continental-scale evidence that Mourning Dove reproductive output is largely driven by human-dominated land cover including agricultural and residential areas. With Mourning Doves declining across the range, discerning more fine-scale land cover factors is critical for ensuring Mourning Dove populations persist into the future.
人类主导的土地覆盖与美国哀鸽(Zenaida macroura)繁殖产量的空间变化相对应
研究土地覆盖影响的研究通常侧重于丰度、分布和/或群落丰富度,而忽视了潜在的人口过程,如生存或繁殖。在这里,我们展示了一个独特的数据集的发现,该数据集使我们能够测量整个哀鸽分布地区的土地覆盖与繁殖产出之间的关系。我们利用2008年至2014年美国1271个县的狩猎所得的哀鸽翅膀数据来估计空间显性年龄比(幼鸟:成年鸟),这是当地生殖产出的一个指数。我们还使用栅格图像数据来估计生殖产量与土地覆盖和作物覆盖之间的关系。我们发现,低繁殖产出发生在哀鸽数量下降最严重的地区。我们的研究结果表明,土地覆盖的影响在地理上是不同的,但即使在粗糙的分辨率下,人类主导的景观相对比例的微小变化也会对这种多面手物种的生殖产出产生重大影响。在美国东部,玉米和大豆系统与哀鸽繁殖产量减少高达57%相关。在美国西部,发达地区的生殖产量增加了41%。在美国各地,原生栖息地与年龄比例呈中性或负相关。我们的研究提供了大陆尺度的证据,表明哀鸽的繁殖产出在很大程度上受人类主导的土地覆盖(包括农业和居民区)的驱动。随着哀鸽在整个范围内的减少,识别更精细的土地覆盖因素对于确保哀鸽种群在未来持续存在至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Condor
Condor ORNITHOLOGY-
CiteScore
6.30
自引率
12.50%
发文量
46
审稿时长
6-12 weeks
期刊介绍: The Condor is the official publication of the Cooper Ornithological Society, a non-profit organization of over 2,000 professional and amateur ornithologists and one of the largest ornithological societies in the world. A quarterly international journal that publishes original research from all fields of avian biology, The Condor has been a highly respected forum in ornithology for more than 100 years. The journal is one of the top ranked ornithology publications. Types of paper published include feature articles (longer manuscripts) Short Communications (generally shorter papers or papers that deal with one primary finding), Commentaries (brief papers that comment on articles published previously in The Condor), and Book Reviews.
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