Feed aggregator
The long-tailed tit – successful, adaptable, sociable, and oh so cute
This tiny ball of fluff with an impossibly long tail, has almost doubled in numbers since the 1980s
A brief, high-pitched “see-see-see” sound, followed by the appearance of half-a-dozen tiny balls of fluff, each attached to what looks like a protruding stick. Then, more calls, as these flying lollipops flit from one tree to the next, pause, grab an invisible insect, and then move rapidly on.
Encountering a flock of long-tailed tits on a frosty January day is always a delight. Few other birds so immediately provoke a smile, for few other birds are quite so… well, adorable is the word that most readily to mind. When you discover that – as my friend and fellow nature writer Dominic Couzens puts it – the long-tailed tit is the only small bird that spends Christmas with its family, then their status in the pantheon of cuteness is confirmed.
Continue reading...Hypothermia: why most deaths are preventable
New research into the cold weather killer suggests health authorities need to start taking action much earlier in the season
Earlier this month the cold snap across Europe claimed more than 60 lives. In Poland temperatures fell to below -30°C in some regions and 10 people died of the cold on 8 January alone. Meanwhile in Greece and Turkey refugees and homeless people suffered greatly in the unseasonably heavy snow. The sad thing is that almost all of these deaths were preventable.
Every winter hypothermia extends its icy grip, causing 25,000 extra deaths per year in England for example. A decrease in air temperature of 1°C causes a 1.35% increase in mortality across Europe, and added up over the years, cold weather has caused far more deaths than any single heatwave event.
Continue reading...Things fall apart: why do the ecosystems we depend on collapse?
People collapse, buildings collapse, economies collapse and even entire human civilizations collapse. Collapse is also common in the natural world – animal populations and ecosystems collapse. These collapses have the greatest impact on us when they affect resources our industries depend on, leaving ecosystems in tatters and sometimes ruining local economies.
In a new paper, I look at two natural resource industries – fisheries and forestry – that are highly susceptible to collapse.
From the infamous 1980s collapse of the Canadian cod industry to the apparent imminent collapse of the Heyfield sawmill in southern Victoria, we can see a recurring pattern. And by getting better at predicting this pattern, we might be able to avoid collapse in the future.
The stages of collapseIn fisheries, collapse follows a familiar pathway, which has up to eight stages. In a 1993 report for the US Marine Mammal Commission on harvesting ocean resources, L.M. Talbot described these stages:
fishers discover a new fishery, or a new method of harvesting an existing stock
fishers develop the new resource with little or no regulation
major fishing effort results in over-capitalisation of the equipment used to harvest the resource – the value of the fishery can sometimes even be less than the investment fishers made
fishers develop the capacity to catch more fish than the fishery can sustain
fishery becomes depleted and the number of fish caught begins to decline
fishers intensify their efforts to catch fish to offset the decline in harvest
intensive fishing continues as fishers attempt to recoup investments in over-capitalised equipment
fishery is depleted to such levels that it is no longer economic for fishers to go fishing. At this stage the fishery is fully collapsed.
In some cases, regulators attempt to manage the fishery as fishers intensify their efforts. Examples include putting in place quotas and economic subsidies, or reducing the fishing capacity of the fleets.
However, these are often belated and ineffective. This is particularly so given uncertainty about the fishing resource, lack of information on the ecology of the target species, and the fact that an industry with vested interests will lobby hard to protect those interests.
Subsidies at these stages – such as tax breaks and/or fuel rebates – may mean that fishing becomes artificially profitable. Fishers may remain in the industry and continue to overinvest to obtain a greater share of a dwindling resource.
Many forestry industries around the world show similar stages.
Native forest harvesting in Australia is a highly capital-intensive industry. It uses heavy machinery that costs a lot to purchase, leading to high interest repayments. Such efficient harvesting may not only employ relatively few people, but also outstrip the amount of timber that can be sustainably harvested (like stage four in fisheries collapse).
Significant amounts of timber and pulpwood need to be processed continuously to pay the interest and other bills for equipment (stage seven).
Moreover, logging may continue even though it is highly uneconomic to do so (stage eight) and other industries that are damaged by logging (such as the water and tourism industries) are significantly more economically lucrative.
Why do industries overharvest?Fisheries and forestry often allocate greater harvest limits than the ecosystem can produce without declining.
One key reason this happens is that fish or timber allocations often don’t account for losses from natural events.
For example, the mountain ash forests of Victoria rely on severe wildfires to regenerate. They are also extensively logged for paper and timber production.
Yet the organisation responsible for scheduling of logging in these forests (VicForests) does not account for losses due to fire when calculating how much timber can be harvested. Major fires in 2009 badly damaged more than 52,000 hectares of this forest. But environmental accounting analyses indicate there has been relatively little change in sustained yield allocation since these fires.
Yet, modelling suggests that, over 80 years, wildfire will damage 45% of the forest estate. This amount should therefore should not be included as timber available for logging.
Another driver of the problem of resource over-commitment can be gaming, where stock availability and direct employment are deliberately overstated. This may be to secure the status and influence of a given institution with government, or for other reasons such as leverage in negotiations over access to resources.
The autobiography of Julia Gillard, the former Australian prime minister, suggests this occurred during debates over the fate of forests in Tasmania, alleging that Forestry Tasmania overstated forest available for harvest. Forestry Tasmania denied these allegations.
What can we do?Early intervention in fisheries and forestry industries can prevent ecosystem and industry collapse. We also need to better ways to assess resources, including accounting for losses of resources due to natural disturbances.
However, in some cases resources have been so heavily over-committed that industry collapse is virtually inevitable. For example, environmental accounting work in the wet forests of the Central Highlands of Victoria suggests very little sawlog resource is left as a result of many decades of overcutting and associated wildfire. Clearfell logging makes these forests more prone to particularly severe fires.
The collapse of the sawlog industry is highly likely, even if there is no fire. This is clear from the pleas from sawmills for access to further forest resources – even when such extra resources basically do not exist.
Now the industry needs to transition to plantations for paper production and for timber (82% of all sawn timber already comes from plantations in the state).
Alternative industries like tourism that employ far more people and contribute more to the economy must be fostered. There are many examples to draw on – New Zealand is one of many.
When governments know in advance about likely industry collapse, then it is incumbent upon them to intervene earlier and help foster transitions to new (and often more lucrative) industries. This ensures that workers can find jobs in new sectors, and the transition is less painful for the community and less costly for taxpayers. Failure to do this is unethical.
The closure of the Hazelwood power station in Victoria is a classic example of a lack of planning for industry transition. The need to close Hazelwood was discussed in formal reports by the former State Electricity Commission more than 25 years ago.
The need to transition the native forest industry to plantations is equally clear and must be done as a matter of urgency.
![The Conversation](https://counter.theconversation.edu.au/content/71491/count.gif)
David Lindenmayer receives funding from The Australian Research Council (ARC Laureate Fellowship), the Australian Government's National Environmental Science Program (Threatened Species Recovery Hub), and the Government of Victoria. David Lindenmayer is the Research Director of the Threatened Species Recovery Hub within the National Environmental Science Program. He is also the Research Director of the Long-term Ecological Research Network (LTERN) within the Terrestrial Ecosystem Research Network (TERN).
Bringing a breath of fresh air to the UK’s polluted cities
Featuring a sturdy leather head-strap and mask, two large tubes and a transparent backpack containing a small potted plant, designer Chih Chiu’s response to crowded, polluted cities is stark.
“My initial idea was to separate an individual from the public space,” he says.
Continue reading...The eco guide to saving the whale
The whale plays a crucial role in maintaining the health of the oceans, which means that these days it’s more a matter of the giant creatures saving us
When the whalers of the mid-19th century harpooned the planet’s biggest marine mammals into near-oblivion, at least they took copious notes. These are now being used to better understand ocean science: if you enjoy a bit of historical ecology, you’ll find them at whaling.oldweather.org.
I wish whaling was all historical, but right now the Japanese whaler Nisshin Maru is likely to be in hot pursuit of the Southern Ocean’s remaining whales. At least they face opposition from direct action charity Sea Shepherd, which recently launched Ocean Warrior, a new anti-whaling vessel.
Continue reading...UK scientists bid to solve mystery deaths of hundreds of baby southern right whales
Two-year project aims to learn why carcasses have washed up on Argentina’s coast
Researchers are to launch an investigation into the unexplained deaths of hundreds of young southern right whales, one of the planet’s most vulnerable marine species.
The £740,000 project – jointly funded by Defra, the UK environment department, and the EU – will involve researchers tagging whales and calves, tracking them by satellite and identifying individuals by taking DNA samples. The aim is find out why the carcasses of almost 500 young southern right whales have washed up on Argentina’s Valdés Peninsula, one of the species’ key calving areas, over the past decade.
Continue reading...Diver mauled by shark near Great Barrier Reef
55-year-old in a stable condition after suffering significant abdominal injuries in attack east of Murray Island in the Torres Strait
A scuba driver endured a four-hour boat ride to a medical facility after being mauled by a shark while scuba diving in Queensland’s far north near the Great Barrier Reef.
The 55-year-old man suffered significant abdominal injuries in the attack while diving east of Murray Island in the Torres Strait on Saturday. Emergency services were notified around 12.40pm AEST.
Continue reading...Project aims to grow a 'city of trees'
The Pacific is sinking
The Pacific is sinking
A place in the country: meet the new woodlanders
If you go down to the woods today... you might find a school, a photographer’s studio, or a carpenter’s workshop. Britain’s forests are getting a new lease of life
In the stillness of autumn, the only sound on the old Saxon road is the gentle tapping of beech nuts falling on a carpet of terracotta-coloured leaves. “You must meet Robert Cunningham – he’s tremendous,” says Kathy Harris, pausing to touch the huge trunk of a venerable beech tree. Harris knows all the ancient trees in this 25-acre wood as individuals. There is also a decaying ash called Cecelia and a beech with two trunks: one has thrown out a limb to fuse with the other, like twins holding hands. There are badgers, rare bats, otters and water rails. A bonfire crackles with burning holly and, as dusk falls, a tawny owl hoots.
Harris is one of a growing number of small woodland owners in Britain – a market for resellers, who buy big forests and subdivide them into “affordable” four- or five-acre plots. One, woodlands.co.uk, has sold more than 625 plots in the past four years. Prices range from £39,000 for six acres in Wales to £95,000 for a similar plot in Hampshire. The reasons for becoming a woodlander are varied and often idealistic, but the Mark Twain quote “Buy land – they’re not making it any more” usually lurks somewhere in the background. Large forests may be the preserve of tax-dodging multimillionaires (if a wood is managed commercially, harvesting timber, it is exempt from inheritance tax), but most woodlanders are a long way from being able to run a commercial operation.
Continue reading...New life radiates from a fallen oak
Blashford Lakes, Hampshire Dead trees don’t get much of a press. For each one remembered, a million will be forgotten
On a dry, dull-grey day, we have come to this popular local nature reserve for a gentle recuperative ramble and some birdwatching. The info board states that we may see bittern, water rail, great egret, and widgeon aplenty. It says nothing about the host of visitors like us who have congested the Blashford Lakes car park, and with whom we exchange pleasantries as our paths cross.
We stop beside a group studying the top of a high tree. We can’t see the bird either, and move on. A chance to sit down in Ivy South Hide and watch from there would be a welcome break, but all the benches are occupied, and others are waiting. We press on across the boardwalk, and find ourselves on a path devoid of people.
Continue reading...Effects of the changing climate in south western Australia
Roger Harrabin: World v Trump on climate deal?
Flying for your life 4: Birds without borders
Want to save the world? Have fewer children | Letters
Chris Goodall’s list of 15 things you can do to help save the world (G2, 19 January) misses what is surely the most important thing: have fewer children. Without controlling population growth we have to run ever faster to stay in the same place as far as climate change is concerned.
Catherine Goundry
Retford, Nottinghamshire
• In an item regarding Gambia, the country was referred to as “the Gambia” (Report, 19 January). I remember from my youth many countries referred to in this way and am interested as to the reason. There was the Argentine, the Levant, the Lebanon etc. Does anyone know why they were prefaced with “the”?
Tony Burson
Campinas, Brazil
Climate change, endangered primates and life as an elephant – green news roundup
The week’s top environment news stories and green events. If you are not already receiving this roundup, sign up here to get the briefing delivered to your inbox
Continue reading...The week in wildlife – in pictures
Hugging deer, feeding green turtles and a Konik foal are among this week’s pick of images from the natural world
Continue reading...