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Articles by Jon E. Keeley
Dormancy type, seed traits, and species identity shape seed-associated fungal community composition in tropical pioneer trees
Introduction Fruits and seeds have evolved complex suites of chemical and physical traits that shape both seed dispersal and defense against pathogens and granivores (Whitehead et al., 2022). These traits directly or indirectly influence survival by affecting how seeds interact with the biotic and abiotic factors that determine which seeds persist in the soil until conditions are conducive to germination (Dalling et al., 2011, 2020).
Causal analysis of fire regime drivers in California
Background Understanding the relative contribution of climate and human factors to wildfires is critical for managing risk across California’s diverse ecosystems, in the United States (US). Aims We propose a model that distinguishes between proximate and ultimate drivers of fire regimes and apply it to a century of fire and climate data to assess regional variation in causal mechanisms.
How Santa Ana winds fueled the deadly fires in Southern California
Thousands of homes and other structures, including several schools, burned, and at least 29 people died. The fires, which started Jan. 7, burned for days, forcing evacuation orders for more than 180,000 residents. When the winds were strongest, there was little firefighters could do to control the flames. The Santa Ana winds occur when there is high pressure to the east, in the Great Basin, and a low-pressure system off the coast.
How Santa Ana winds fueled deadly California fires
(THE CONVERSATION) Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods in early January 2025, creating a terrifying scene. Thousands of homes and other structures, including several schools, burned, and at least 29 people died. The fires, which started Jan. 7, burned for days, forcing evacuation orders for more than 180,000 residents.
How Santa Ana winds fueled the deadly fires in Southern California
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How Santa Ana winds fueled the deadly fires in Southern California
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Jon Keeley, University of California, Los Angeles (THE CONVERSATION) Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods in early January 2025, creating a terrifying scene.
Wildfires, , climate change, California
WILDEFIRESHow Santa Ana Winds Fueled the Deadly Fires in Southern California Published 14 January 2025 California is seeing more destructive fires than we saw in the past. That’s driven not just by changes in the climate and the winds, but also by population growth. Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods starting Jan. 7, 2025, creating a terrifying scene.
ANALYSIS: Santa Ana winds responsible for fires' spread
Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods last week creating a terrifying scene. Thousands of homes and other structures, including several schools, had burned by Sunday, and at least 24 people had died. The fires, which started Jan. 7, were still burning days later. Officials had urged more than 180,000 residents to evacuate.
Bagaimana angin Santa Ana memicu kebakaran mematikan di California Selatan
Angin Santa Ana yang kuat, dengan kekuatan hembusan setara badai, bertiup dari pegunungan di dekat Los Angeles, menyebarkan kebakaran hutan ke beberapa permukiman pada awal Januari 2025, menciptakan pemandangan yang mengerikan. Ribuan rumah dan bangunan lain, termasuk beberapa sekolah, luluh lantak pada 12 Januari. Setidaknya 16 orang meninggal dunia. Kebakaran yang dimulai pada 7 Januari tersebut masih terus berlangsung beberapa hari kemudian.
How Santa Ana winds fueled the deadly fires in Southern California
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) (THE CONVERSATION) Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods in early January 2025, creating a terrifying scene. Article continues below this ad Thousands of homes and other structures, including several schools, had burned by Jan. 12, and at least 24 people had died.
How Santa Ana Winds Fuelled Deadly Wildfires In Southern California
Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighbourhoods in early January 2025, creating a terrifying scene. Thousands of homes and other structures, including several schools, had burned by January 12, and at least 16 people had died. The fires, which started January 7, were still burning days later. Officials had urged more than 180,000 residents to evacuate.
Cómo vientos de Santa Ana provoca incendios en Los Ángeles
A partir del 7 de enero de 2025, los fuertes vientos de Santa Ana, a veces casi huracanados, golpearon con fuerza las montañas de las afueras de Los Ángeles (Estados Unidos) y provocaron incendios forestales en varios barrios. El 8 de enero habían ardido más de 1 000 edificios, en su mayoría viviendas, y al menos cinco personas habían muerto. Las autoridades instaron a más de 100 000 residentes a evacuar, pero con vientos tan fuertes, poco pudieron hacer los bomberos para controlar las llamas.
How Santa Ana winds fueled the deadly fires in Southern California
Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods in early January 2025, creating a terrifying scene. Thousands of homes and other structures, including several schools, had burned by Jan. 11, at least 11 people had died, and the fires, which started Jan. 7, were still burning. Officials had urged more than 180,000 residents to evacuate.
Los Angeles in Flammen: Santa-Ana-Winde entfachen Inferno
Orkanartige Santa-Ana-Winde fegten über Kalifornien. Die Böen entfachten verheerende Waldbrände in den Bergen. Warum Teile von Los Angeles Feuer fingen. Starke Santa-Ana-Winde mit Böen bis zur Orkanstärke fegten am 7. Januar 2025 über die Berge außerhalb von Los Angeles. Dort breiteten sich Waldbrände aus, die auf mehrere Stadtteile übergriffen und ein schreckliches Bild boten. Anzeige Bis zum 10.
What's behind Trump's land grab threats
He isn’t president yet, but Donald Trump is already causing diplomatic waves. Ahead of his inauguration on Jan. 20, the incoming U.S. leader has signaled an interest in taking possession of Greenland and the Panama Canal, while also making noises about Canada becoming a “51st state.” Of course, just how serious Trump is in pursuing those rather sizable land grabs will become clear during the months and years in which he inhabits the White House. But nonetheless, they invite a key question: Why?
How Santa Ana Winds Push Deadly California Wildfires to New Heights
Powerful Santa Ana winds, with gusts reaching hurricane strength, swept down the mountains outside Los Angeles and spread wildfires into several neighborhoods starting Jan. 7, 2025, creating a terrifying scene Thousands of homes and other structures, including several schools, had burned by Jan. 9, and at least five people had died. Officials urged more than 180,000 residents to evacuate at the height of the fires.
Cómo los vientos de Santa Ana han provocado incendios mortales en el sur de California
¿Qué causa los vientos de Santa Ana? Los vientos de Santa Ana son vientos secos y potentes que soplan desde las montañas hacia la costa del sur de California. En la región se producen una media de diez vientos de Santa Ana al año, normalmente entre otoño y enero. Cuando las condiciones son secas, como ahora, estos vientos pueden convertirse en un grave peligro de incendio.
Ecologista americano explica o que são e como os 'Ventos de Santa Ana' alimentaram os incêndios mortais em Los Angeles
Os ventos secos e fortes que descem as montanhas em direção à costa do sul da Califórnia em janeiro este ano foram muito mais violentos, alimentando e espalhando incêndios florestais que atingiram a área urbana de diversos bairros da cidade Os poderosos ventos de Santa Ana, às vezes com força de furacão, varreram as montanhas nos arredores de Los Angeles, na Califórnia, e provocaram incêndios florestais em vários bairros desde o últimio dia 7 de janeiro.
Ecologista americano explica o que são e como os ‘Ventos de Santa Ana’ alimentaram os incêndios mortais em Los Angeles
_Os poderosos ventos de Santa Ana, às vezes com força de furacão, varreram as montanhas nos arredores de Los Angeles, na Califórnia, e provocaram incêndios florestais em vários bairros desde o últimio dia 7 de janeiro. Mais de 1.000 casas e várias escolas haviam sido queimadas em 8 de janeiro e pelo menos cinco pessoas haviam morrido.
Cómo los vientos de Santa Ana han provocado incendios mortales en el sur de California
Details 09 January 2025 A partir del 7 de enero de 2025, los fuertes vientos de Santa Ana, a veces casi huracanados, golpearon con fuerza las montañas de las afueras de Los Ángeles (Estados Unidos) y provocaron incendios forestales en varios barrios... El 8 de enero habían ardido más de 1 000 edificios, en su mayoría viviendas, y al menos cinco personas habían muerto.
Comment les vents du désert alimentent les incendies qui ravagent la Californie du Sud
Les vents puissants de Santa Ana approchent parfois la force d’un ouragan. Depuis le 7 janvier 2025, ils balayent les montagnes à l’extérieur de Los Angeles et poussent les incendies jusqu’aux quartiers résidentiels. Le 8 janvier, plus de 1 000 structures avaient brûlé, principalement des habitations, et au moins cinq personnes étaient mortes. Les autorités ont exhorté plus de 100 000 habitants à évacuer, mais les vents sont si forts que les pompiers peinent à maîtriser les flammes.
Cómo los vientos de Santa Ana han provocado incendios mortales en el sur de California Original
A partir del 7 de enero de 2025, los fuertes vientos de Santa Ana, a veces casi huracanados, golpearon con fuerza las montañas de las afueras de Los Ángeles (Estados Unidos) y provocaron incendios forestales en varios barrios. El 8 de enero habían ardido más de 1 000 edificios, en su mayoría viviendas, y al menos cinco personas habían muerto. Las autoridades instaron a más de 100 000 residentes a evacuar, pero con vientos tan fuertes, poco pudieron hacer los bomberos para controlar las llamas.
How Santa Ana winds fueled the deadly fires in Southern California
By Jon Keeley, Research Ecologist, USGS; Adjunct Professor, University of California, Los Angeles Powerful Santa Ana winds, near hurricane strength at times, swept down the mountains outside Los Angeles and pushed wildfires into several neighborhoods starting Jan. 7, 2025. Over 1,000 stuctures, mostly homes, had burned and at least five people had died by Jan. 8. Officials urged more… Read complete article © The Conversation -
How Santa Ana winds fueled the deadly fires in Southern California Original
Powerful Santa Ana winds, near hurricane strength at times, swept down the mountains outside Los Angeles and pushed wildfires into several neighborhoods starting Jan. 7, 2025. Over 1,000 homes had burned and at least five people had died by Jan. 8. Officials urged more than 70,000 residents to evacuate, but with the winds so strong, there was little firefighters could do to control the flames.
How Santa Ana winds fueled the deadly fires in Southern California
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Ceanothus: Taxonomic patterns in life history responses to fire
Links More information: Publisher Index Page (via DOI) Download citation as: RIS | Dublin Core Study Area Publication type Article Publication Subtype Journal Article Title Ceanothus: Taxonomic patterns in life history responses to fire Series title American Journal of Botany DOI 10.1002/ajb2.16434 Edition Online First Year Published 2024 Language English Publisher Botanical Society of America Contributing office(s) Western Ecological Research Center Description e16434 Country United States...
Climate and weather drivers in southern California Santa Ana Wind and non-Santa Wind fires
Links More information: Publisher Index Page (via DOI) Open Access Version: Publisher Index Page Download citation as: RIS | Dublin Core Study Area Publication type Article Publication Subtype Journal Article Title Climate and weather drivers in southern California Santa Ana Wind and non-Santa Wind fires Series title International Journal of Wildland Fire DOI 10.1071/WF23190 Volume 33 Year Published 2024 Language English Publisher CSIRO Publishing Contributing office(s) Western Ecological...
The need for mechanistic explanations in (seed) ecology
‘I would rather discover one cause than gain the kingdom of Persia’. Democritus (460–370 bc) ‘Data do not understand causes and effects; humans do’.
Climate and weather drivers in southern California Santa Ana Wind and non-Santa Wind fires
International Journal of Wildland Fire 33, WF23190 https://doi.org/10.1071/WF23190 Submitted: 5 December 2023 Accepted: 10 July 2024 Published: 15 August 2024 © 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of IAWF.
Ignitions explain more than temperature or precipitation in driving Santa Ana wind fires
Abstract Autumn and winter Santa Ana wind (SAW)–driven wildfires play a substantial role in area burned and societal losses in southern California. Temperature during the event and antecedent precipitation in the week or month prior play a minor role in determining area burned. Burning is dependent on wind intensity and number of human-ignited fires. Over 75% of all SAW events generate no fires; rather, fires during a SAW event are dependent on a fire being ignited.
Ignitions explain more than temperature or precipitation in driving Santa Ana wind fires
Abstract Autumn and winter Santa Ana wind (SAW)–driven wildfires play a substantial role in area burned and societal losses in southern California. Temperature during the event and antecedent precipitation in the week or month prior play a minor role in determining area burned. Burning is dependent on wind intensity and number of human-ignited fires. Over 75% of all SAW events generate no fires; rather, fires during a SAW event are dependent on a fire being ignited.
Wildfires and global change
Navigation Bar Menu Home Reviews Juli G Pausas, Corresponding Author juli.g.pausas@ext.uv.es Centro de Investigaciones sobre Desertificación, Consejo Superior de Investigaciones Cientificas (CIDE-CSIC), Montcada, Spain Search for more papers by this author Jon E Keeley, Western Ecological Research Center, Sequoia–Kings Canyon Field Station, US Geological Survey, Three Rivers, CA Department of Ecology and Evolutionary Biology, University of California–Los Angeles, Los Angeles, CA Search for...
A Recipe for Ancient Wildfires
Have humans created an environment that encourages wildfires to blaze out of control? Definitely. But wildfires existed long before we did. Homo sapiens didn’t appear until 100,000 years ago; the fossil record shows that wildfires are much, much older. As soon as there was terrestrial life, there was fire. A 2001 study from geologist Walter L. Cressler III describes fossilized charcoal uncovered in an ancient riverbed in north-central Pennsylvania, dating back to the Late Devonian Period.
Contrasting prescription burning and wildfires in California Sierra Nevada national parks and adjacent national forests
RESEARCH ARTICLE (Open Access) Previous Next Contents Vol 30(4) Jon E. Keeley A B D , Anne Pfaff A and Anthony C. Caprio C + Author Affiliations - Author Affiliations A US Geological Survey, Western Ecological Research Center, Sequoia–Kings Canyon Field Station, Three Rivers, CA 93271, USA. B Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, USA. C Science and Natural Resource Management, Sequoia–Kings Canyon National Parks, Three Rivers, CA 93271, USA.
Bagaimana angin Santa Ana memicu kebakaran mematikan di California Selatan
Element 25 inks pivotal manganese supply deal with… MELBOURNE, VICTORIA - News Direct - 10 January 2023 - Element 25 Ltd (ASX:E25) managing director Justin Brown sits down with Proactive's Elisha Newell to discuss a pivotal agreement with gl… ST Telemedia Global Data Centres Announces Availab… SINGAPORE - Media OutReach Newswire - 30 May 2024 - ST Telemedia Global Data Centres (STT GDC), one of the world's fastest-growing data centre providers, is announcing artifici… Philippine investment...
Historical patterns of wildfire ignition sources in California ecosystems
RESEARCH ARTICLE (Open Access) Jon E. Keeley A B and Alexandra D. Syphard C + Author Affiliations - Author Affiliations A US Geological Survey, Western Ecological Research Center, Sequoia–Kings Canyon Field Station, 47050 Generals Highway, Three Rivers, CA 93271, USA. B Department of Ecology and Evolutionary Biology, University of California, 612 Charles E. Young Drive East, Los Angeles, CA 90095, USA. C Conservation Biology Institute, 10423 Sierra Vista Avenue, La Mesa, CA 91941, USA.
Mapping fire regime ecoregions in California
RESEARCH ARTICLE Previous Next Online Early Alexandra D. Syphard A B E and Jon E. Keeley C D + Author Affiliations - Author Affiliations A Conservation Biology Institute, 136 SW Washington Ave., Corvallis, OR 97333, USA. B Sage Insurance Holdings, LLC, 600 California Street, San Francisco, CA 94108, USA. C US Geological Survey, Western Ecological Research Center, Sequoia-Kings Canyon Field Station, 47050 Generals Highway, Three Rivers, CA 93271, USA.
How can climate change affect natural disasters?
Year Published: 2017 Land change monitoring, assessment, and projection (LCMAP) revolutionizes land cover and land change research When nature and humanity change Earth’s landscapes - through flood or fire, public policy, natural resources management, or economic development - the results are often dramatic and lasting.Wildfires can reshape ecosystems. Hurricanes with names like Sandy or Katrina will howl for days while altering the landscape for years. One growing season in...
International Journal of Wildland Fire
RESEARCH ARTICLE (Open Access) Previous Next Online Early Jon E. Keeley A B D and Juli G. Pausas C + Author Affiliations - Author Affiliations A US Geological Survey, Western Ecological Research Center, Sequoia–Kings Canyon Field Station, Three Rivers, CA 93271, USA. B Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, USA.
Large, high‐intensity fire events in southern California shrublands: debunking the fine‐grain age patch model
We evaluate the fine‐grain age patch model of fire regimes in southern California shrublands. Proponents contend that the historical condition was characterized by frequent small to moderate size, slow‐moving smoldering fires, and that this regime has been disrupted by fire suppression activities that have caused unnatural fuel accumulation and anomalously large and catastrophic wildfires.
Native peoples’ relationship to the California chaparral
Ethnographic interviews and historical literature reviews provide evidence that for many tribes of California, chaparral plant communities were a rich source of food, medicines, and technologies and that they supplemented natural fires with deliberate burning of chaparral to maximize its ability to produce useful products. Many of the most important chaparral plant species used in the food and material culture have strong adaptations to fire.
Human presence diminishes the importance of climate in driving fire activity across the United States
SignificanceProjections of worsening wildfire conditions under climate change are a major concern in policy and management, but there is little understanding of geographical variation in fire-climate relationships. Our analysis relating climate variables to historical fire activity across the United States showed substantial variability in the importance of different seasonal temperature and precipitation variables and of climate overall in explaining fire activity.
Why were California's wine country fires so destructive?
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
Why were California's wine country fires so destructive?
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
Why were California's wine country fires so destructive? - Odessa American: Wire News
(THE CONVERSATION) As of late October more than a dozen wildfires north of San Francisco had killed more than 40 people, burned approximately 160,000 acres and destroyed more than 7,000 structures. This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
Why were California's wine country fires so destructive?
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
Why were California's wine country fires so destructive?
As of late October more than a dozen wildfires north of San Francisco had killed more than 40 people, burned approximately 160,000 acres and destroyed more than 7,000 structures. This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
Why were California's wine country fires so destructive?
This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964. This extreme wind-driven fire burned under similar conditions, across much of the same landscape and covered an area substantially greater than the recent Tubbs fire.
Why were California's wine country fires so destructive?
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) This tragic loss of life and property is unprecedented in California. However, the fires are not anomalous events in terms of their size, intensity or the speed with which they spread. Indeed, the path of the destructive Tubbs fire in Napa and Sonoma counties mirrors that of the Hanley fire of 1964.
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