Camino de Santiago


Europe’s oldest forest is threatened by a beetle infestation – let nature take its course

Lucinda Kirkpatrick, University of Stirling

Białowieza Forest is the kind of place you imagine from the Grimm fairy tales. Huge firs, oaks and ashes tower over you, woodpeckers and other birds call all around you and the guides who work there know the intimate history, and names, of many individual trees.

For anyone, it is a magical place – and, as a forest ecologist, visiting it was a dream come true. However, the features that make it so unique may be under threat thanks to new plans for large-scale logging.

Straddling the border between Poland and Belarus, Białowieza is the last remainder of the vast primeval forest that once covered most of Europe. It is a hotbed of biodiversity, home to nearly 20,000 plant and animal species including wolves, lynx and the largest remaining population of European bison. Rare birds, including several woodpecker species, provide a glimpse of the bird life that used to exist in European forests before humans transformed the continent.

The forest is home to around 800 bison.
Francesco Carrani, CC BY

Unfortunately, on the Polish side of the border, only one third of Białowieza Forest is protected. Outside of this area as much as 35% has been earmarked for felling and the fear is that this will result in an increasingly isolated small “island” of protected forest surrounded by fragmented and poorer quality woodland, which has already been shown to support lower bird populations than the protected park area.

Felling around Białowieza has been controlled in the past; quotas were set in 2012 to limit how much wood could be removed. However by 2015, 90% of that quota had already been logged – and the new proposals will triple the permitted volume of logging.

The proposal for further logging is controversial. Poland’s state forest department, Lasy Panstwowe, views the felling as necessary to combat outbreaks of spruce bark beetle, the larvae of which burrow under the bark of living spruce trees to lay its eggs. The developing larvae feed on inner woody layers and can eventually kill the tree.

Spruce bark beetles were here…and it didn’t end well for the tree.
Tõnu Pani, CC BY-SA

However, both local scientists and NGOs, such as Greenpeace Polska, argue that removing damaged trees will cause more harm than good and that further logging is driven by economic rather than management interests. Professor Tomasz Wesołowski, who has studied Białowieza’s birds for more than 30 years, told me it would be a disaster, as logging and replanting would completely change the quality of the forest habitat and threaten its UNESCO heritage site status. There is even a suggestion that this violates Poland’s environmental commitments under the EU’s Natura 2000 program.

The newly proposed logging areas cover 20% of the old-growth forest, as well as areas overgrown by endangered bog woodland habitat. Mass logging would dramatically alter the character of both the areas in question and the surrounding habitat – even more than the bark beetles.

In fact, across the world this form of “salvage logging” to recover economic value from damaged forests often causes more damage to ecosystems than the initial natural disturbance. After a bark beetle invasion hit Sumava National Park, that stretches across the border between Bavaria and the Czech Republic, evidence showed that salvage logging delayed forest recovery.

There’s life in dead wood

The proposed increased logging in Białowieza includes removing quantities of dead wood, yet this dead wood plays an important role in the functioning of a healthy forest. Forests are often built from the bottom up, with dead wood as the foundation.

While aesthetically they may not be that pleasing for us, dead trees are a vital habitat for saproxylic insects which feed on dead and decaying matter. Białowieza supports large populations of endangered saproxylic beetles and invertebrates which rely on dead wood and, in turn, these provide food for birds, small rodents such as shrews and voles, and bats including the rare barbastelle. In turn these animals are eaten by larger predators such as owls, wolves and lynx.

The forest food web starts here.
Aleksander Bolbot / shutterstock

Dead and dying spruce stumps are almost exclusively used by some woodpecker species as nests and also act as great hosts for lichens and mosses, some of which are facing extinction in Europe. If the dead wood is removed, the entire forest ecosystem will suffer.

Logging is unnecessary

Logging is not the only solution to the spruce bark beetle problem. Pheromone traps, for instance, effectively attract large numbers of beetles while outbreaks in the UK are controlled by unleashing a specific predator beetle, Rhizophagus grandis, that targets the spruce beetle. Due to its widespread use in commercial forestry, R. grandis is relatively cheap and readily available, and Forestry Commission research showed it was more effective at controlling outbreaks than salvage logging.

In any case, a beetle infestation might be disastrous for individual trees but it won’t necessarily harm the forest itself. Like many ecosystems, Białowieza is vulnerable to climate change. As species such as Norway spruce are weakened by changing climatic conditions, the bark beetle is able to take hold. This is an invaluable part of the forest regeneration process, allowing deciduous trees that are better able to cope with changing climatic conditions to grow in the gaps left by dying spruces. In the long run it may be better for Białowieza Forest to let nature, and regeneration, take its course.

The Conversation

Lucinda Kirkpatrick, PhD Researcher in Forest Ecology, University of Stirling

This article was originally published on The Conversation. Read the original article.

Australia, the US and Europe are climate ‘free-riders’: it’s time to step up

Glenn Althor, The University of Queensland; James Watson, The University of Queensland, and Richard Fuller, The University of Queensland

The Paris climate agreement finalised in December last year heralded a new era for climate action. For the first time, the world’s nations agreed to keep global warming well below the critical threshold of 2℃.

This is vital for climate-vulnerable nations. Fewer than 4% of countries are responsible for more than half of the world’s greenhouse gas emissions. In a study published today in Nature Scientific Reports, we reveal just how deep this injustice runs.

Developed nations such as Australia, the United States, Canada, and European countries are essentially climate “free-riders”: causing the majority of the problem (through high greenhouse gas emissions), while incurring few of the costs (such as climate change’s impact on food and water).

In other words, a few countries are benefiting enormously from the consumption of fossil fuels, while at the same time contributing disproportionately to the global burden of climate change.

Clearly this is not fair by any definition, or as Pope Francis put it in last year’s encyclical on climate change:

Our lack of response to these tragedies involving our brothers and sisters points to the loss of that sense of responsibility for our fellow men and women upon which all civil society is founded.

Taking a free ride

Using recent data on greenhouse gas emissions and climate vulnerability, we mapped the countries that are benefiting from fossil fuels without paying the price of the resulting climate change, as you can see below.

A Map from our study, showing which countries produce the most greenhouse gases and experience the least effects of climate change (brown) and countries that produce the least greenhouse gases but experience the worst effects of climate change (green).

Those countries contributing most to climate change are by far the least vulnerable to its effects, pointing at an enormous global inequity.

Many of the highest greenhouse gas-emitting countries, including the United States, Canada, Australia and China, are also the least vulnerable to climate change, meaning they are essentially taking a “free ride”.

China for example, was responsible for over 20% of the world’s greenhouse gas emissions in 2010, but has a relatively low vulnerability to the impacts of climate change.

On the flip side, there are many forced riders, who are bearing the brunt of climate change impacts despite having scarcely contributed to the problem. Many of the world’s most climate-vulnerable countries, the majority of which are African or Small Island States, produce a very small quantity of emissions.

This is much like a non-smoker getting cancer from secondhand smoke, while the heavy smoker is fortunate enough to puff away in good health.

We found a general pattern globally: countries that emit more greenhouse gases are usually less vulnerable to the negative effects of climate change.

Using projections of climate vulnerability to the year 2030, we find that this inequity is expected to worsen as more countries that contribute little to global warming become acutely vulnerable to climate change-related pressures such as droughts, floods, biodiversity loss and disease.

Work in progress

The Paris Agreement has been widely hailed as a positive step forward in addressing climate change for all, although the details on addressing “climate justice” can be best described as sketchy.

The goal of keeping global temperatures “well below” 2℃ is commendable but the emissions-reduction pledges submitted by countries leading up to the Paris talks are very unlikely to deliver on this. The future of many of the world’s most vulnerable countries, particularly small islands that face total inundation, will depend on radically limiting climate change sooner rather than later.

More than US$100 billion in funding has been put on the table for supporting developing nations to reduce emissions, however the agreement specifies that there is no formal distinction between developed and developing nations in their responsibility to cut emissions, effectively ignoring historic emissions.

There is also very little detail on who will provide the funds or, importantly, who is responsible for their provision. Securing these funds, and establishing who is responsible for raising them will also be vital for the future of climate vulnerable countries.

The most climate-vulnerable countries in the world have contributed very little to creating the global disease from which they now suffer the most from. There must urgently be a meaningful mobilisation of the policies outlined in the agreement if we are to achieve national emissions reductions while helping the most vulnerable countries adapt to climate change.

And it is clearly up to the current generation of leaders from high-emitting nations to decide whether they want to be remembered as climate change tyrants or pioneers.

The Conversation

Glenn Althor, PdD Candidate, The University of Queensland; James Watson, Associate professor, The University of Queensland, and Richard Fuller, Associate professor, The University of Queensland

This article was originally published on The Conversation. Read the original article.