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I would like to understand if there were issues with forests in Europe prior to 19th century and, if so, what were the reasons behind them?
Two versions that I have are overusing forests as the energy source (sounds questionable due to availability of coal) and eradicating forests for cultivation areas.
Both options seems viable due to high population density in Europe and low temperatures in the winter, at least in the north.
You did not specify what you mean by 'forest deficit'. Wood for shipbuilding was a finite and important resource. Many places had royal forests that were reserved for the king, specifically for shipbuilding, which required planning over decades-long time frames and vigilance against timber thieves.
Even when there were not reserved forests, legislation, restrictions and privileges related to cutting wood were quite common.
Here is a reference with many little details about Portuguese law:
Some scattered translated points from this document, you can find much more if you read everything and follow the references:
pp9
XV c. common formula in letters patent for privileges "lá onde mais lhes apraz" to indicate permission to cut wood in determined places.
1471: prohibits export of wood to Castile and Africa.
1474: shipbuilders get privileges: they can cut wood anywhere, including royal forests, and do not pay taxes over wood.
pp12
Shipbuilders in Vianna had many difficulties in obtaining wood. In the XV c., massive quantities of wood were imported without dizima (tax). (from Galiza and Asturias)
Wood was needed for building vines, and there was competition with shipbuilders. Farmers were obliged to plant oaks, etc. Prohibition of new shipbuilding companies for lack of wood.
p19
p20
The Leiria Council complains that many farmers stop working and go cut and transport wood, and this is why their crop yields are bad.
Although there were vigilance and fines, the woods of Alcobaça had many trespassers who cut wood.
To finish with an example from personal hearsay: in Quiaios, Portugal, local people told me that some of their woods were artificially planted and managed by the Navy, and this is why they have so many big trees. They also say that some of them were planted after a 'timber deficit'. (but this is local people talking and not proper documentation).
I guess that it were easier/cheaper to plant a forest with the correct species for shipbuilding in an accessible place, and to care for this forest (heavy criminal penalties for timber thieves) for some decades, than to search for the right species scattered in natural forests, or to buy timber elsewhere at wartime prices.
For a modern conservationist it may be frustrating to discover that a forest is not "native" or "natural". But it is common in European shipbuilding countries. It was also a relevant issue in England too.
PS: remember that import/export tax were the main taxes at that time (no income tax). To import/export something without tax was a huge privilege.
About coal: Without sophisticated mining efforts coal is hard to come by, since surface deposits are not too common, while its transportation in bulk is inefficient with preindustrial technology (especially over land). So most communities either burned wood, or used (at least in part) peat and animal waste.
The Mediterranean was largely deforested by the Romans: they used a lot of wood for heating, for construction, shipbuilding, sieges, and as you also notice, they were quite hungry for agricultural space too.
So the answer is yes. There was forest depletion is some parts of Europe even in the antiquity, and it slowly progressed northwards (of course the great forests of Germania were more or less safe from the Romans, as they could not economically carry away large amounts of timber, and caused only localized damage through military campaigns) and eastwards during the Late Middle Ages and the Modern Age.
Braudel, in his Civilization and Capitalism, stresses greatly, that during all 15-18 cent. period, the wood, even merely as fuel for cooking, was very limited in Western Europe. Let alone great amounts for metallurgy and houses warming or high quality wood for ships.
Wood has always been a limited resource, particularly in the colder climate of Europe. As time went on, the uses for wood got greater, whereas the forests got smaller.
Wood was the primary of providing heat and cooking over much of Europe. Vaclav Smil (‘Harvesting the Biomass’) gives statistics of typical fuelwood use in Sweden in the early 1800s as 5m3 per person per year, and 1.5m3 for warmer Piedmont in Italy. This is comparatively late, after various improvements such as slanted firesides and reflecting firebacks to improve heating efficiency. Smil has calculated that a pre-industrial city might need a woodland area more than 50 times the size of the urban area to provide fuelwood for that city – a major constraint on the size of the city.
Fuelwood was not the only use for wood. Many of the pre-industrial processes relied on the heat provided by kilns, fuelled by wood. Pottery was one, lime burning another. Another answer has already mentioned that in 17th century England, glass makers were forced to use coal instead of wood. The immediate reason for this was the demands of the Royal Navy. It took 6000 oak trees to build a 100-gun ship in the 19th century – and England had hundreds of ships (Smil again).
The iron industry was one of the biggest users of wood. This was compounded by the need to use charcoal rather than just wood, both the achieve the higher temperatures needed, and to supply the carbon needed for iron smelting. Charcoal is produced by heating wood to above 280°C.
https://en.wikipedia.org/wiki/Charcoal
In general, it takes about 5kg of wood to produce 1kg of charcoal, but the charcoal allows you to reach the sort of temperatures to smelt copper and iron. It takes about 90kg of wood to smelt 1kg of copper – this caused considerable deforestation across the Bronze Age Mediterranean. In 18th century England, 1kg of iron needed about 40kg of wood. A typical furnace would produce 300t of pig iron, needing a circle of forest of around 4km diameter. This was each year - a new area of wood would need cutting the next year. English iron production would have needed to consume about 1000km2 of forest every year. (Smil again.) England did not have enough wood – it was less than 15% wooded – and so imported iron from Sweden. England was short of wood: the price of firewood doubled between 1540 and 1570, and tripled again by the 1630s. (Priscilla Brewer: From Fireplace to Cookstove.)
What saved England’s economy was coal. The coal fields of North East England were both close to the surface and near to the sea. There was a flotilla of ships taking coal down to London from the 13th century onwards. The problem with coal is its weight: you really need ships to transport it, which limits where it can go. Coal was central to the Industrial Revolution in England, as it removed the energy constraints imposed by wood, but it needed a network of canals to be built to transport it, followed a few years later by the railways.
https://en.wikipedia.org/wiki/History_of_the_British_canal_system
Even with coal, this did not immediately solve the iron-smelting problem, as burning coal with the iron produced too many impurities. The invention of coke by Abraham Darby finally allowed iron to be produced without charcoal. England was the first European country to make extensive use of coal, because it has the biggest problem with wood supplies. By 1800, it was producing 80% of the world’s coal (Smil). Fossil fuels (coal) were providing more than half of England’s energy by the 17th century (Smil). France passed this mark in the 1870s, Russia in the 1930s.
Industrial activity was fueled by charcoal for a very long period. This caused e.g. the Germans in the early 18-th century to adopt principles of sustainable forrestry.
The English article on sustainable forest management on Wikipedia deals a lot with tropical forests. The German article, on the other hand, has a section on the historical development of the principle of sustainable forest management in Europe. Please consult the translation service of your trust
While not continental Europe, consider the case of England in the 16th and 17th century.
Glassmaking had blossomed in England, spurred on not the least by the 'little ice age' with its lower temperatures, and a desire for more windows in houses. Glassmaking had become so widespread, that the consumption of forest wood to fuel the glass furnaces was threatening to deforest England, and thus crippling their ability to build ships for their navy, which had achieved a position of considerable prominence in English commerce.
So it was in 1615, King James issued a proclamation forbidding the use of wood in the glass furnaces, specifying coal instead.
The problem there is that England is an island surrounded by water... the coal mines were flooding. To address that, Thomas Newcomen invented the first practical steam engine, to pump the mines out.
And the rest is history...
