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| DOI | 10.3356/JRR-23-27 |
| Assessing Range Shifts and Expansions of Crested Caracaras over 30 Years in Arizona, Texas, and Florida, USA | |
| 发表日期 | 2024 |
| ISSN | 0892-1016 |
| EISSN | 2162-4569 |
| 起始页码 | 58 |
| 结束页码 | 2 |
| 卷号 | 58期号:2 |
| 英文摘要 | The ranges of many raptor populations are changing, presumably in response to direct and indirect anthropogenic effects on their habitats. Anecdotal evidence suggests shifts in the distributions of Crested Caracaras (Caracara plancus; hereafter caracaras) over time across their range in the United States (USA), yet formal analysis is lacking. Here we used 30 yr of National Audubon Society Christmas Bird Count and US Geological Survey Breeding Bird Survey data partitioned into ten consecutive 3-yr time periods to assess range shifts and expansions for caracara populations in Arizona, Texas, and Florida, USA, from 1992 through 2021. Data were insufficient to evaluate the Arizona population. In contrast, observations of caracaras increased over time in Texas where the range centroid moved 72.6 km north-northeast with the population expanding into Louisiana. Observations of caracaras also increased over time in Florida, where the range centroid moved 34.3 km southwest. We suggest five competing nonexclusive hypotheses for these changes: (1) temperature increases due to climate change may have allowed expanded breeding in North America of this primarily South American species, (2) increased abundance and use of anthropogenic nesting substrates may have allowed caracara populations to expand, (3) increased foraging opportunities associated with anthropogenic landscape changes may have released otherwise constrained caracara populations, (4) reduced persecution may have allowed this behaviorally plastic species to coexist in proximity to human populations, and (5) habitat saturation may have forced increased dispersal. Future research is needed to evaluate and compare these hypotheses. |
| 英文关键词 | Breeding Bird Survey; Christmas Bird Count; citizen science; demographic processes; distribution; raptor survey |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Ornithology |
| WOS记录号 | WOS:001230053800003 |
| 来源期刊 | JOURNAL OF RAPTOR RESEARCH
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299445 |
| 作者单位 | University of Texas System; University of Texas at San Antonio (UTSA) |
| 推荐引用方式 GB/T 7714 | . Assessing Range Shifts and Expansions of Crested Caracaras over 30 Years in Arizona, Texas, and Florida, USA[J],2024,58(2). |
| APA | (2024).Assessing Range Shifts and Expansions of Crested Caracaras over 30 Years in Arizona, Texas, and Florida, USA.JOURNAL OF RAPTOR RESEARCH,58(2). |
| MLA | "Assessing Range Shifts and Expansions of Crested Caracaras over 30 Years in Arizona, Texas, and Florida, USA".JOURNAL OF RAPTOR RESEARCH 58.2(2024). |
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