Mortality of grassland birds increases with transmission lines

IF 1.4 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Avian Conservation and Ecology Pub Date : 2022-01-01 DOI:10.5751/ace-02096-170117
C. J. Martin, E. Bork, S. Nielsen
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引用次数: 2

Abstract

. Electrical transmission line development has been expanding globally by 5% per year, leading to increases in avian collisions with lines. Canadian estimates of transmission line collision mortalities range from 2.5 to 25.6 million birds per year, with the majority of mortalities attributed to collisions with overhead shield wires, and by susceptible birds that are young, large-bodied, with low maneuverability, or in open habitats. In this study, avian mortality was estimated for a ~4900 ha area in the mixed-grass prairie of southeastern Alberta following construction of two major transmission lines. We surveyed seven 500 m transects 7–10 times during both the breeding and migration seasons, where transects were categorized into road (n = 2), transmission line (n = 2), wetland (with transmission lines above; n = 1), or control (n = 2) areas. During the 2016 breeding season (5 May–24 June), we detected 23 mortalities under transmission lines, 7 mortalities beside roads, and no mortalities in controls. In the 2017 spring migration season (31 March–5 May), we detected 24 mortalities under transmission lines, 3 mortalities beside roads, and no mortalities in controls. Mortality rates were adjusted with biases estimated from detectability and scavenging trials. Scavenging rates were high (82% of carcasses were scavenged within 5 days) and detectability of deceased birds was positively related to body size. Overall, linear disturbances within the study area, including 37.7 km of highways and transmission lines, contributed to an estimated 75 deaths/km nous avons détecté 24 mortalités sous les lignes de transmission, 3 mortalités à côté de routes et aucune mortalité dans les zones témoin. Les taux de mortalité ont été ajustés au moyen de biais calculés à partir d'essais de détectabilité et de disparition des carcasses imputable aux charognards. Les taux de disparition étaient élevés (82 % des carcasses ont été éliminées dans les 5 jours) et la détectabilité des oiseaux morts était positivement liée à leur taille. Dans l'ensemble, les perturbations linéaires dans la zone d'étude, y compris 37,7 km d'autoroutes et de lignes de transmission, ont entraîné 75 mortalités/km de perturbation linéaire pendant une saison de migration et une saison de nidification (~50 mortalités/ km de lignes de transmission et ~25 mortalités/km de routes; ~1904 mortalités d'oiseaux au total). Nos résultats soulignent la nécessité de mettre en place des mesures d'atténuation pour qu'on puisse réduire la mortalité d'oiseaux, minimisant ainsi l'impact à long terme des perturbations linéaires, telles que les lignes de transmission et les routes, sur les communautés d'oiseaux.
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草原鸟类的死亡率随着输电线路的增加而增加
。输电线路的发展以每年5%的速度在全球范围内扩张,导致鸟类与线路相撞的事件增加。据加拿大估计,每年因输电线路碰撞而死亡的鸟类数量在250万至2560万之间,其中大部分死亡是由于与架空屏蔽线的碰撞,以及易受影响的雏鸟,体型大,机动性低,或在开阔的栖息地。在这项研究中,估计了阿尔伯塔省东南部约4900公顷的混交草草原在两条主要输电线路建设后的鸟类死亡率。在繁殖和迁徙季节,我们对7个500 m的样带进行了7-10次调查,样带分为道路(n = 2)、输电线(n = 2)、湿地(输电线在上面;N = 1),或控制(N = 2)区域。在2016年繁殖季节(5月5日至6月24日),我们发现输电线路下有23例死亡,道路旁有7例死亡,对照组无死亡。在2017年春季迁徙季节(3月31日至5月5日),我们发现输电线路下有24例死亡,道路旁有3例死亡,对照组无死亡。死亡率根据可检出性和清除试验估计的偏差进行调整。清除率高(82%的尸体在5天内被清除),死禽的检出率与体型呈正相关。总体而言,研究区域内的线性扰动,包括37.7公里的高速公路和输电线路,造成每公里内大约75人死亡,24人死亡,24人死亡,3人死亡,3人死亡,3人死亡,3人死亡,4人死亡,4人死亡,4人死亡,3人死亡,4人死亡,3人死亡,3人死亡,4人死亡,3人死亡,3人死亡,4人死亡,3人死亡,3人死亡,4人死亡,3人死亡,3人死亡,4人死亡,3人死亡,3人死亡,4人死亡,3人死亡,4人死亡,4人死亡。死亡人数不能算作是死亡人数,不能算作是死亡人数,不能算作是死亡人数,不能算作是死亡人数,不能算作是死亡人数,不能算作是死亡人数。lestaux de disparment(82%的人在5小时内死亡)和lestaux morts(82%的人在5小时内死亡)和lestaux morts(82%的人在5小时内死亡)综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列,综上所列~1904年死亡率(总死亡率)。3 .不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是,不确定的是。
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来源期刊
Avian Conservation and Ecology
Avian Conservation and Ecology BIODIVERSITY CONSERVATION-ORNITHOLOGY
CiteScore
2.20
自引率
7.10%
发文量
43
审稿时长
>12 weeks
期刊介绍: Avian Conservation and Ecology is an open-access, fully electronic scientific journal, sponsored by the Society of Canadian Ornithologists and Birds Canada. We publish papers that are scientifically rigorous and relevant to the bird conservation community in a cost-effective electronic approach that makes them freely available to scientists and the public in real-time. ACE is a fully indexed ISSN journal that welcomes contributions from scientists all over the world. While the name of the journal implies a publication niche of conservation AND ecology, we think the theme of conservation THROUGH ecology provides a better sense of our purpose. As such, we are particularly interested in contributions that use a scientifically sound and rigorous approach to the achievement of avian conservation as revealed through insights into ecological principles and processes. Papers are expected to fall along a continuum of pure conservation and management at one end to more pure ecology at the other but our emphasis will be on those contributions with direct relevance to conservation objectives.
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