内华达山脉的柳树捕蝇器数量继续下降,但在两个恢复的草地上损失减少

Q4 Agricultural and Biological Sciences Western Birds Pub Date : 2022-02-01 DOI:10.21199/wb53.1.5
Helen L. Loffland, Lynn N. Schofield, R. Siegel, B. Christman
{"title":"内华达山脉的柳树捕蝇器数量继续下降,但在两个恢复的草地上损失减少","authors":"Helen L. Loffland, Lynn N. Schofield, R. Siegel, B. Christman","doi":"10.21199/wb53.1.5","DOIUrl":null,"url":null,"abstract":"Willow Flycatcher (Empidonax traillii) populations have been declining across the western United States for decades. The Sierra Nevada–southern Cascades population in California is especially vulnerable, with fewer than 200 pairs remaining. Hydrologic restoration has been recommended for conserving this population. Other riparian songbirds have increased in response to restoration, but little is known about how restoration has affected the Willow Flycatcher. The Little Truckee River has long been a stronghold for the Willow Flycatcher, and the demography of the population there was studied intensively from the late 1990s through 2010. Baseline data from that study provided an opportunity to gauge the species’ response to pond-and-plug restoration projects completed at two meadows within the study area in 2009 and 2010. We aggregated and analyzed data from Willow Flycatcher surveys from 1997 through 2019 at the two restored meadows as well as nine nearby unrestored meadows with at least two Willow Flycatcher territories at some time during the demographic study. At most meadows, the number and density of Willow Flycatcher territories declined over the two-decade study period. However, losses at the unrestored meadows were significantly greater than at the restored meadows, where territory density clearly did not collapse following the disturbance caused by restoration and then remained largely stable thereafter. Within large meadows already occupied by Willow Flycatchers, meadow restoration that restores hydrologic function and increases flooding over creekbanks may be an effective strategy for stabilizing declining Willow Flycatcher populations in the Sierra Nevada.","PeriodicalId":52426,"journal":{"name":"Western Birds","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Sierra Nevada Willow Flycatcher Decline Continues but Losses Abate at Two Restored Meadows\",\"authors\":\"Helen L. Loffland, Lynn N. Schofield, R. Siegel, B. Christman\",\"doi\":\"10.21199/wb53.1.5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Willow Flycatcher (Empidonax traillii) populations have been declining across the western United States for decades. The Sierra Nevada–southern Cascades population in California is especially vulnerable, with fewer than 200 pairs remaining. Hydrologic restoration has been recommended for conserving this population. Other riparian songbirds have increased in response to restoration, but little is known about how restoration has affected the Willow Flycatcher. The Little Truckee River has long been a stronghold for the Willow Flycatcher, and the demography of the population there was studied intensively from the late 1990s through 2010. Baseline data from that study provided an opportunity to gauge the species’ response to pond-and-plug restoration projects completed at two meadows within the study area in 2009 and 2010. We aggregated and analyzed data from Willow Flycatcher surveys from 1997 through 2019 at the two restored meadows as well as nine nearby unrestored meadows with at least two Willow Flycatcher territories at some time during the demographic study. At most meadows, the number and density of Willow Flycatcher territories declined over the two-decade study period. However, losses at the unrestored meadows were significantly greater than at the restored meadows, where territory density clearly did not collapse following the disturbance caused by restoration and then remained largely stable thereafter. Within large meadows already occupied by Willow Flycatchers, meadow restoration that restores hydrologic function and increases flooding over creekbanks may be an effective strategy for stabilizing declining Willow Flycatcher populations in the Sierra Nevada.\",\"PeriodicalId\":52426,\"journal\":{\"name\":\"Western Birds\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Western Birds\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.21199/wb53.1.5\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Agricultural and Biological Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Western Birds","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21199/wb53.1.5","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 3

摘要

几十年来,美国西部的捕柳蝇(emidonax traillii)种群数量一直在下降。加州内华达山脉-南喀斯喀特山脉的种群尤其脆弱,只剩下不到200对。建议通过水文恢复来保护这一种群。其他河岸鸣禽的数量也随着恢复而增加,但人们对恢复对捕柳鸟的影响知之甚少。小特拉基河长期以来一直是柳捕蝇器的大本营,从20世纪90年代末到2010年,人们对那里的人口进行了深入研究。该研究的基线数据提供了一个机会来衡量该物种对2009年和2010年在研究区域内的两个草甸完成的池塘和塞子修复项目的反应。我们汇总并分析了1997年至2019年在两个恢复的草地以及附近9个未恢复的草地进行的柳捕蝇调查的数据,这些草地在人口统计研究期间的某个时候至少有两个柳捕蝇区。在20年的研究期间,大多数草甸的捕柳区数量和密度都有所下降。然而,未恢复草地的领土密度损失明显大于恢复草地,恢复草地的领土密度明显没有在恢复干扰后崩溃,之后基本保持稳定。在已经被柳捕蝇占据的大片草地上,恢复草地的水文功能和增加河岸的洪水可能是稳定内华达山脉不断下降的柳捕蝇种群的有效策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Sierra Nevada Willow Flycatcher Decline Continues but Losses Abate at Two Restored Meadows
Willow Flycatcher (Empidonax traillii) populations have been declining across the western United States for decades. The Sierra Nevada–southern Cascades population in California is especially vulnerable, with fewer than 200 pairs remaining. Hydrologic restoration has been recommended for conserving this population. Other riparian songbirds have increased in response to restoration, but little is known about how restoration has affected the Willow Flycatcher. The Little Truckee River has long been a stronghold for the Willow Flycatcher, and the demography of the population there was studied intensively from the late 1990s through 2010. Baseline data from that study provided an opportunity to gauge the species’ response to pond-and-plug restoration projects completed at two meadows within the study area in 2009 and 2010. We aggregated and analyzed data from Willow Flycatcher surveys from 1997 through 2019 at the two restored meadows as well as nine nearby unrestored meadows with at least two Willow Flycatcher territories at some time during the demographic study. At most meadows, the number and density of Willow Flycatcher territories declined over the two-decade study period. However, losses at the unrestored meadows were significantly greater than at the restored meadows, where territory density clearly did not collapse following the disturbance caused by restoration and then remained largely stable thereafter. Within large meadows already occupied by Willow Flycatchers, meadow restoration that restores hydrologic function and increases flooding over creekbanks may be an effective strategy for stabilizing declining Willow Flycatcher populations in the Sierra Nevada.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Western Birds
Western Birds Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
0.60
自引率
0.00%
发文量
0
期刊最新文献
David F. DeSante’s Birds of Cabo San Lucas, Fall 1968: A Historic Account First Record of Tricolored Blackbirds in Idaho American Crow Cracks Open Bivalve via Automobile Second Prebasic Molt of a Black-headed Gull at Anchorage, Alaska Nesting Bald Eagle Population Numbers, Density, Territorial Resources, and Relationship to Human Development in Northern Colorado’s Front Range
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1