more than 4,400 species globally
by Lito Vilisoni Wilson, University of Melbourne
by Lito Vilisoni Wilson, University of Melbourne
Wildfire near a windfarm northeast Spain. Credit: Lluis Brotons
Changes in fire activity are putting at risk more than 4,400 species across the globe, says a new paper led by the University of Melbourne, involving 27 international researchers.
"Those species include 19 percent of birds, 16 percent of mammals, 17 percent of dragonflies and 19 percent of legumes that are classified as critically endangered, endangered or vulnerable," said lead author, Dr. Luke Kelly, a Senior Lecturer in Ecology and Centenary Research Fellow. "That's a massive number of plants and animals facing threats associated with fire."
The paper, "Fire and biodiversity in the Anthropocene," published in Science, found that the species categorized as threatened by an increase in fire frequency or intensity, include the orangutan in Indonesia and mallee emu-wren in Australia.
"Recent fires have burned ecosystems where wildfire has historically been rare or absent, from the tropical forests of Queensland, Southeast Asia and South America to the tundra of the Arctic Circle," Dr. Kelly said.
"Very large and severe fires have also been observed in areas with a long history of recurrent fire, and this is consistent with observations of longer fire seasons and predictions of increased wildfire activity in the forests and shrub lands of Australia, southern Europe and the western United States."
The research team also found a striking example from Australia: the total area burnt by bushfires in the eastern seaboard from August 2019 to March 2020, 12.6 million hectares, was unprecedented in scale.
However, some species and ecosystems are threatened when fire doesn't occur. Frequent fires, for example, are an important part of African savanna ecosystems and less fire activity can lead to shrub encroachment, which can displace wild herbivores such as wildebeest that prefer open areas.
"Understanding what's causing changes in different places helps us to find effective solutions that benefit people and nature," Dr. Kelly said.
Researchers, including 27 authors from a combined 25 institutions around the world (including six authors from the University of Melbourne), identified three main groups of human drivers as transforming fire activity and its impacts of biodiversity: global climate change, land-use and biotic invasions. This means that people and governments around the world need to act and confront the diverse changes to the environment that are occurring.
"It really is time for new, bolder conservation initiatives," Dr. Kelly said. "Emerging actions include large-scale habitat restoration, reintroductions of mammals that reduce fuels, creation of low-flammability green spaces and letting bushfires burn under the right conditions. The role of people is really important: Indigenous fire stewardship will enhance biodiversity and human well-being in many regions of the world."
Michael Clarke, Professor of Zoology at La Trobe University, who supported the study, echoed Dr. Kelly's call, saying "Our research highlights the magnitude of the challenge fire poses to animals, plants and people, given worsening climatic conditions—a conclusion echoed in the recent Royal Commission report into last summer's fires."
Explore further Threatened species hit hard by Australia's bushfires
More information: Luke T. Kelly et al. Fire and biodiversity in the Anthropocene, Science (2020). DOI: 10.1126/science.abb0355
Journal information: Science
Provided by University of Melbourne
Changes in fire activity are putting at risk more than 4,400 species across the globe, says a new paper led by the University of Melbourne, involving 27 international researchers.
"Those species include 19 percent of birds, 16 percent of mammals, 17 percent of dragonflies and 19 percent of legumes that are classified as critically endangered, endangered or vulnerable," said lead author, Dr. Luke Kelly, a Senior Lecturer in Ecology and Centenary Research Fellow. "That's a massive number of plants and animals facing threats associated with fire."
The paper, "Fire and biodiversity in the Anthropocene," published in Science, found that the species categorized as threatened by an increase in fire frequency or intensity, include the orangutan in Indonesia and mallee emu-wren in Australia.
"Recent fires have burned ecosystems where wildfire has historically been rare or absent, from the tropical forests of Queensland, Southeast Asia and South America to the tundra of the Arctic Circle," Dr. Kelly said.
"Very large and severe fires have also been observed in areas with a long history of recurrent fire, and this is consistent with observations of longer fire seasons and predictions of increased wildfire activity in the forests and shrub lands of Australia, southern Europe and the western United States."
The research team also found a striking example from Australia: the total area burnt by bushfires in the eastern seaboard from August 2019 to March 2020, 12.6 million hectares, was unprecedented in scale.
However, some species and ecosystems are threatened when fire doesn't occur. Frequent fires, for example, are an important part of African savanna ecosystems and less fire activity can lead to shrub encroachment, which can displace wild herbivores such as wildebeest that prefer open areas.
"Understanding what's causing changes in different places helps us to find effective solutions that benefit people and nature," Dr. Kelly said.
Researchers, including 27 authors from a combined 25 institutions around the world (including six authors from the University of Melbourne), identified three main groups of human drivers as transforming fire activity and its impacts of biodiversity: global climate change, land-use and biotic invasions. This means that people and governments around the world need to act and confront the diverse changes to the environment that are occurring.
"It really is time for new, bolder conservation initiatives," Dr. Kelly said. "Emerging actions include large-scale habitat restoration, reintroductions of mammals that reduce fuels, creation of low-flammability green spaces and letting bushfires burn under the right conditions. The role of people is really important: Indigenous fire stewardship will enhance biodiversity and human well-being in many regions of the world."
Michael Clarke, Professor of Zoology at La Trobe University, who supported the study, echoed Dr. Kelly's call, saying "Our research highlights the magnitude of the challenge fire poses to animals, plants and people, given worsening climatic conditions—a conclusion echoed in the recent Royal Commission report into last summer's fires."
Explore further Threatened species hit hard by Australia's bushfires
More information: Luke T. Kelly et al. Fire and biodiversity in the Anthropocene, Science (2020). DOI: 10.1126/science.abb0355
Journal information: Science
Provided by University of Melbourne
Humans are changing fire patterns, and it's threatening 4,403 species with extinction
by Luke Kelly, Annabel Smith, Katherine Giljohann and Michael Clarke, The Conversation
The Leadbeater’s possum, one of thousands of species threatened by changing fire regimes. Credit: Shutterstock
deployment of rapid response teams to enact targeted fire suppression and emergency conservation management, including providing animal refuges, reseeding to promote plant regeneration and large-scale habitat restoration
reintroduction of grazing and digging animals that regulate fire regimes by reducing fuel loads, for the benefit of whole ecosystems
Indigenous fire stewardship, and continuing and reinstating cultural burning in a modern context. This boosts biodiversity, ecosystems and human well-being
green firebreaks or greenbelts, which comprises low-flammability land uses such as parkland and open vegetation to help reduce fire spread, while providing refuges for wildlife.
Where to from here?
The input of scientists will be valuable in helping navigate big decisions about new and changing ecosystems.
Empirical data and models can monitor and forecast changes in biodiversity. For example, new modelling has allowed University of Melbourne researchers to identify alternative strategies for introducing planned or prescribed burning that reduces the risk of large bushfires to koalas.
New partnerships are also needed to meet the challenges ahead.
At the local and regional scale, Indigenous-led fire stewardship is an important approach for fostering relationships between Indigenous and non-Indigenous organisations and communities around the world.
And international efforts to reduce greenhouse gas emissions and limit global warming are crucial to reduce the risk of extreme fire events. With more extreme fire events ahead of us, learning to understand and adapt to changes in fire regimes has never been more important.
Explore further
by Luke Kelly, Annabel Smith, Katherine Giljohann and Michael Clarke, The Conversation
The Leadbeater’s possum, one of thousands of species threatened by changing fire regimes. Credit: Shutterstock
Last summer, many Australians were shocked to see fires sweep through the wet tropical rainforests of Queensland, where large and severe fires are almost unheard of. This is just one example of how human activities are changing fire patterns around the world, with huge consequences for wildlife.
In a major new paper published in Science, we reveal how changes in fire activity threaten more than 4,400 species across the globe with extinction. This includes 19% of birds, 16% of mammals, 17% of dragonflies and 19% of legumes that are classified as critically endangered, endangered or vulnerable.
But, we also highlight the emerging ways we can help promote biodiversity and stop extinctions in this new era of fire. It starts with understanding what's causing these changes and what we can do to promote the "right" kind of fire.
How is fire activity changing?
Recent fires have burned ecosystems where wildfire has historically been rare or absent, from the tropical forests of Queensland, Southeast Asia and South America to the tundra of the Arctic Circle.
Exceptionally large and severe fires have also been observed in areas with a long history of fire. For example, the 12.6 million hectares that burnt in eastern Australia during last summer's devastating bushfires was unprecedented in scale.
This extreme event came at a time when fire seasons are getting longer, with more extreme wildfires predicted in forests and shrublands in Australia, southern Europe and western United States.
But fire activity isn't increasing everywhere. Grasslands in countries such as Brazil, Tanzania, and the United States have had fire activity reduced.
Extinction risk in a fiery world
Fire enables many plants to complete their life cycles, creates habitats for a wide range of animals and maintains a diversity of ecosystems. Many species are adapted to particular patterns of fire, such as banksias—plants that release seeds into the resource-rich ash covering the ground after fire.
But changing how often fires occur and in what seasons can harm populations of species like these, and transform the ecosystems they rely on.
We reviewed data from the International Union for Conservation of Nature (IUCN) and found that of the 29,304 land-based and freshwater species listed as threatened, modified fire regimes are a threat to more than 4,403.
Most are categorised as threatened by an increase in fire frequency or intensity.
For example, the endangered mallee emu-wren in semi-arid Australia is confined to isolated patches of habitat, which makes them vulnerable to large bushfires that can destroy entire local populations.
Likewise, the Kangaroo Island dunnart was listed as critically endangered before it lost 95% of its habitat in the devastating 2019-2020 bushfires.
However, some species and ecosystems are threatened when fire doesn't occur. Frequent fires are an important part of African savanna ecosystems and less fire activity can lead to shrub encroachment. This can displace wild herbivores such as wildebeest that prefer open areas.
How humans change fire regimes
There are three main ways humans are transforming fire activity: global climate change, land-use and the introduction of pest species.
Global climate change modifies fire regimes by changing fuels such as dry vegetation, ignitions such as lightning, and creating more extreme fire weather.
What's more, climate-induced fires can occur before the dominant tree species are old enough to produce seed, and this is reshaping forests in Australia, Canada and the United States.
Humans also alter fire regimes through farming, forestry, urbanisation and by intentionally starting or suppressing fires.
Introduced species can also change fire activity and ecosystems. For example, in savanna landscapes of Northern Australia, invasive gamba grass increases flammability and fire frequency. And invasive animals, such as red foxes and feral cats, prey on native animals exposed in recently burnt areas.
Importantly, cultural, social and economic changes underpin these drivers. In Australia, the displacement of Indigenous peoples and their nuanced and purposeful use of fire has been linked with extinctions of mammals and is transforming vegetation.
In a major new paper published in Science, we reveal how changes in fire activity threaten more than 4,400 species across the globe with extinction. This includes 19% of birds, 16% of mammals, 17% of dragonflies and 19% of legumes that are classified as critically endangered, endangered or vulnerable.
But, we also highlight the emerging ways we can help promote biodiversity and stop extinctions in this new era of fire. It starts with understanding what's causing these changes and what we can do to promote the "right" kind of fire.
How is fire activity changing?
Recent fires have burned ecosystems where wildfire has historically been rare or absent, from the tropical forests of Queensland, Southeast Asia and South America to the tundra of the Arctic Circle.
Exceptionally large and severe fires have also been observed in areas with a long history of fire. For example, the 12.6 million hectares that burnt in eastern Australia during last summer's devastating bushfires was unprecedented in scale.
This extreme event came at a time when fire seasons are getting longer, with more extreme wildfires predicted in forests and shrublands in Australia, southern Europe and western United States.
But fire activity isn't increasing everywhere. Grasslands in countries such as Brazil, Tanzania, and the United States have had fire activity reduced.
Extinction risk in a fiery world
Fire enables many plants to complete their life cycles, creates habitats for a wide range of animals and maintains a diversity of ecosystems. Many species are adapted to particular patterns of fire, such as banksias—plants that release seeds into the resource-rich ash covering the ground after fire.
But changing how often fires occur and in what seasons can harm populations of species like these, and transform the ecosystems they rely on.
We reviewed data from the International Union for Conservation of Nature (IUCN) and found that of the 29,304 land-based and freshwater species listed as threatened, modified fire regimes are a threat to more than 4,403.
Most are categorised as threatened by an increase in fire frequency or intensity.
For example, the endangered mallee emu-wren in semi-arid Australia is confined to isolated patches of habitat, which makes them vulnerable to large bushfires that can destroy entire local populations.
Likewise, the Kangaroo Island dunnart was listed as critically endangered before it lost 95% of its habitat in the devastating 2019-2020 bushfires.
However, some species and ecosystems are threatened when fire doesn't occur. Frequent fires are an important part of African savanna ecosystems and less fire activity can lead to shrub encroachment. This can displace wild herbivores such as wildebeest that prefer open areas.
How humans change fire regimes
There are three main ways humans are transforming fire activity: global climate change, land-use and the introduction of pest species.
Global climate change modifies fire regimes by changing fuels such as dry vegetation, ignitions such as lightning, and creating more extreme fire weather.
What's more, climate-induced fires can occur before the dominant tree species are old enough to produce seed, and this is reshaping forests in Australia, Canada and the United States.
Humans also alter fire regimes through farming, forestry, urbanisation and by intentionally starting or suppressing fires.
Introduced species can also change fire activity and ecosystems. For example, in savanna landscapes of Northern Australia, invasive gamba grass increases flammability and fire frequency. And invasive animals, such as red foxes and feral cats, prey on native animals exposed in recently burnt areas.
Importantly, cultural, social and economic changes underpin these drivers. In Australia, the displacement of Indigenous peoples and their nuanced and purposeful use of fire has been linked with extinctions of mammals and is transforming vegetation.
The post-fire landscape in Flinders Chase National Park, Kangaroo Island, three months after an extremely large and severe bushfire last summer. Credit: Luke Kelly
We need bolder conservation strategies
A suite of emerging actions—some established but receiving increasing attention, others new—could help us navigate this new fire era and save species from extinction.
We need bolder conservation strategies
A suite of emerging actions—some established but receiving increasing attention, others new—could help us navigate this new fire era and save species from extinction.
They include:
managed wildfire—let some fires burn naturally in fire-prone ecosystems where fire has been absent for too long, suppressing only under specific conditions
managed wildfire—let some fires burn naturally in fire-prone ecosystems where fire has been absent for too long, suppressing only under specific conditions
deployment of rapid response teams to enact targeted fire suppression and emergency conservation management, including providing animal refuges, reseeding to promote plant regeneration and large-scale habitat restoration
reintroduction of grazing and digging animals that regulate fire regimes by reducing fuel loads, for the benefit of whole ecosystems
Indigenous fire stewardship, and continuing and reinstating cultural burning in a modern context. This boosts biodiversity, ecosystems and human well-being
green firebreaks or greenbelts, which comprises low-flammability land uses such as parkland and open vegetation to help reduce fire spread, while providing refuges for wildlife.
Where to from here?
The input of scientists will be valuable in helping navigate big decisions about new and changing ecosystems.
Empirical data and models can monitor and forecast changes in biodiversity. For example, new modelling has allowed University of Melbourne researchers to identify alternative strategies for introducing planned or prescribed burning that reduces the risk of large bushfires to koalas.
New partnerships are also needed to meet the challenges ahead.
At the local and regional scale, Indigenous-led fire stewardship is an important approach for fostering relationships between Indigenous and non-Indigenous organisations and communities around the world.
And international efforts to reduce greenhouse gas emissions and limit global warming are crucial to reduce the risk of extreme fire events. With more extreme fire events ahead of us, learning to understand and adapt to changes in fire regimes has never been more important.
Explore further
Changes in fire activity are threatening more than 4,400 species globally
Provided by The Conversation
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Provided by The Conversation
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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