Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions

Powerline collisions have been identified on Kaua'i as a potential contributing factor to the large-scale decline of both Hawaiian Petrel (Pterodroma sandwichensis) and Newell's Shearwater (Puffinus newelli), but the scale of the powerline collision problem is unknown. From 2012 to 2020 we...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Marc S. Travers, Scott Driskill, Angela Stemen, Theresa Geelhoed, David M. Golden, Shiho Koike, Amy A. Shipley, Hannah E. Moon, Tracy Anderson, Molly Bache, Andre F. Raine
Formato:	article
Lenguaje:	EN
Publicado:	Resilience Alliance 2021
Materias:	carcass search crippling bias environmental bias grounded bird searches hawaiian petrel newell's shearwater powerline collision powerline height seabirds Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/36029c2c6cce4ac78d60c9a28ae6a865
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:36029c2c6cce4ac78d60c9a28ae6a865
record_format	dspace
spelling	oai:doaj.org-article:36029c2c6cce4ac78d60c9a28ae6a8652021-11-15T16:40:14ZPost-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions1712-6568https://doaj.org/article/36029c2c6cce4ac78d60c9a28ae6a8652021-06-01T00:00:00Zhttps://www.ace-eco.org/vol16/iss1/art15/https://doaj.org/toc/1712-6568Powerline collisions have been identified on Kaua'i as a potential contributing factor to the large-scale decline of both Hawaiian Petrel (Pterodroma sandwichensis) and Newell's Shearwater (Puffinus newelli), but the scale of the powerline collision problem is unknown. From 2012 to 2020 we conducted observations for seabird powerline collisions across Kaua'i, documented grounded seabirds, and assessed crippling and environmental biases - both poorly studied facets of powerline collision research. We directly observed 121 powerline collisions and detected 89 grounded seabirds. While some collisions resulted in birds falling lifelessly out of the sky, most resulted in seabirds flying or gliding outside of the search area. This means that traditional ground searches would underestimate total collisions by 78-88% if not accounting for crippling bias. We tested environmental bias by comparing our ability to conduct searches for grounded birds, "searchability", across multiple variables. Environmental bias resulted in significant reductions in searchability across regions, environment types, and powerline heights. Furthermore, observed collision rates were significantly higher at powerlines that had very low to zero searchability. Forty-three percent of observed collisions occurred at unsearchable powerlines (mainly spanning steep valleys), equating to an estimated 3170 seabird collisions that could not be detected through ground searches. We detected powerline collisions in every region of Kaua'i, in every environment type, and at all powerline heights monitored. Our results show that crippling bias and environmental bias are the mechanisms that concealed the geographic distribution of collisions and the scale of the powerline problem from grounded bird searches, ultimately preventing the detection of thousands of collisions. The data collected for this study are critical for assessing the scale of seabird powerline collisions and quantifying the biases inherent in traditional ground searches.Marc S. TraversScott DriskillAngela StemenTheresa GeelhoedDavid M. GoldenShiho KoikeAmy A. ShipleyHannah E. MoonTracy AndersonMolly BacheAndre F. RaineResilience Alliancearticlecarcass searchcrippling biasenvironmental biasgrounded bird searcheshawaiian petrelnewell's shearwaterpowerline collisionpowerline heightseabirdsPlant cultureSB1-1110Environmental sciencesGE1-350Plant ecologyQK900-989ENAvian Conservation and Ecology, Vol 16, Iss 1, p 15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	carcass search crippling bias environmental bias grounded bird searches hawaiian petrel newell's shearwater powerline collision powerline height seabirds Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
spellingShingle	carcass search crippling bias environmental bias grounded bird searches hawaiian petrel newell's shearwater powerline collision powerline height seabirds Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989 Marc S. Travers Scott Driskill Angela Stemen Theresa Geelhoed David M. Golden Shiho Koike Amy A. Shipley Hannah E. Moon Tracy Anderson Molly Bache Andre F. Raine Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
description	Powerline collisions have been identified on Kaua'i as a potential contributing factor to the large-scale decline of both Hawaiian Petrel (Pterodroma sandwichensis) and Newell's Shearwater (Puffinus newelli), but the scale of the powerline collision problem is unknown. From 2012 to 2020 we conducted observations for seabird powerline collisions across Kaua'i, documented grounded seabirds, and assessed crippling and environmental biases - both poorly studied facets of powerline collision research. We directly observed 121 powerline collisions and detected 89 grounded seabirds. While some collisions resulted in birds falling lifelessly out of the sky, most resulted in seabirds flying or gliding outside of the search area. This means that traditional ground searches would underestimate total collisions by 78-88% if not accounting for crippling bias. We tested environmental bias by comparing our ability to conduct searches for grounded birds, "searchability", across multiple variables. Environmental bias resulted in significant reductions in searchability across regions, environment types, and powerline heights. Furthermore, observed collision rates were significantly higher at powerlines that had very low to zero searchability. Forty-three percent of observed collisions occurred at unsearchable powerlines (mainly spanning steep valleys), equating to an estimated 3170 seabird collisions that could not be detected through ground searches. We detected powerline collisions in every region of Kaua'i, in every environment type, and at all powerline heights monitored. Our results show that crippling bias and environmental bias are the mechanisms that concealed the geographic distribution of collisions and the scale of the powerline problem from grounded bird searches, ultimately preventing the detection of thousands of collisions. The data collected for this study are critical for assessing the scale of seabird powerline collisions and quantifying the biases inherent in traditional ground searches.
format	article
author	Marc S. Travers Scott Driskill Angela Stemen Theresa Geelhoed David M. Golden Shiho Koike Amy A. Shipley Hannah E. Moon Tracy Anderson Molly Bache Andre F. Raine
author_facet	Marc S. Travers Scott Driskill Angela Stemen Theresa Geelhoed David M. Golden Shiho Koike Amy A. Shipley Hannah E. Moon Tracy Anderson Molly Bache Andre F. Raine
author_sort	Marc S. Travers
title	Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
title_short	Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
title_full	Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
title_fullStr	Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
title_full_unstemmed	Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions
title_sort	post-collision impacts, crippling bias, and environmental bias in a study of newell's shearwater and hawaiian petrel powerline collisions
publisher	Resilience Alliance
publishDate	2021
url	https://doaj.org/article/36029c2c6cce4ac78d60c9a28ae6a865
work_keys_str_mv	AT marcstravers postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT scottdriskill postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT angelastemen postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT theresageelhoed postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT davidmgolden postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT shihokoike postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT amyashipley postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT hannahemoon postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT tracyanderson postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT mollybache postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions AT andrefraine postcollisionimpactscripplingbiasandenvironmentalbiasinastudyofnewellsshearwaterandhawaiianpetrelpowerlinecollisions
_version_	1718426896036790272

Post-collision impacts, crippling bias, and environmental bias in a study of Newell's Shearwater and Hawaiian Petrel powerline collisions

Ejemplares similares