One of the most read blogs is that entitled “Stick and flick, a possible solution to dog mess in woodlands”.  It also has elicited some very detailed comments.  It concerns the problem of dog faeces / poo that is left in woodlands and public spaces.   A NFU  survey in Scotland revealed significant issues associated with irresponsible access, notably livestock worrying by dogs,  the impacts of owners failing to pick up faeces after their pets, but also plastic bag pollution . Whilst, there is no shortage of dog fouling laws in the United Kingdom, the hanging of poo-filled plastic bags from bushes and trees has sadly become commonplace in many areas.   Local authorities in England and Wales receive many thousands of complaints about dog fouling each year. Not only is dog faeces a risk to us in terms of disease (due to bacteria such as E.coli and Campylobacter, plus parasites such as hookworms and roundworms), but it is also a danger to livestock through parasites such as Neospora, which can cause abortion in cattle, and Sarcocystis which affects sheep. Forestry England asks you “Bag and bin your dog's waste. Any public or household waste bin can take bagged dog poo.”  The National Trust has produced a Canine Code, like that displayed at Mottistone Manor, Isle of Wight (see below).  It offers sound advice for wherever you are walking your dog be it a National Trust property or local woodland.

The first few weeks of owning a patch of woodland feel like the beginning of a long and special relationship. Every discovery is new; each adventure a first. A wood reveals it secrets slowly.   We’ve already tramped round every corner of the wood, tearing our shins on brambles, sniffing at fungi, clambering round stumps and totting up the oak, hazel, maple, cherry and rowan that thrive under our canopy of pine and larch. We’ve sat and looked and listened in all weathers, at every time of day. Starting a list of birds was the first thing to do: a mewing buzzard overhead, marsh tits pitching in the roving tit flock, the tap of woodpecker and nuthatch. Autumn – though this year so mild and late – soon announced itself with a first skein of pink-footed geese calling high and unseen over the wood, the first redwing chattering at the wood edge… sounds and colours change; the big wheel keeps on turning… We have always loved moths, for their beauty, their ubiquity, their astonishing variety. Moths range in size from the tiny micros whose larvae leave scribbled signatures across the leaves in which they live, to the powerful hawkmoths or that mythic blue-underwinged beauty the Clifden Nonpareil, a creature practically the size of a small bat, and probably the most sought-after moth among the old collectors with, in some years, just a single individual found across the country. For there’s also a rich and often eccentric history of moth recording in this country with most of the larger moths – the macros - having evocative vernacular names (though don’t confuse your Bright-line Brown-eye with a Brown-line Bright-eye!), and an array of techniques for acquiring them from pupa digging, plastering tree trunks with mixtures of treacle and rum, to light. Nowadays, moths are generally photographed and released rather than pinned; recording them is an excellent way of assessing the biodiversity of a site or tracking population changes. It was clearly time to break out the old moth trap.   And so it was that this September for the first time in years we dusted down the generator, filled the trap with fresh egg boxes for the anticipated moths to settle on, spread out our white sheet in a promising looking glade, and hoped to goodness that our 125W mercury vapour bulb would still fire up after all these years… As night came the light shed unfamiliar shadows through the wood; we waited, net in hand, taking care not to look directly at the blazing UV light; waited with a palpable sense of anticipation… what secret would the wood reveal? At first, nothing. And then a first furtive fluttering across the clearing to the trap – probably a Common Marbled Carpet though I’d have to check – and a plumper-bodied moth, and me there wracking my brains: it’s a noctuid, sure, but I’m so rusty – what’s-it-called? Flame? Flame Shoulder? Setaceous Hebrew Character…? ‘What the hell was that?’ said Beth Something ridiculously large had flapped out of the shadows and vanished. Knelt at the trap, I’d glimpsed it too from the corner of my eye. Could it be a hawkmoth on our very first trap, that would be very cool! I grabbed the net; we stood back and waited. I knew we had something beyond the ordinary when Beth yelled ‘There it is!’ and I swung the net and captured it on a second sweep. It was big all right! Anxious not to lose our catch, whatever it was, we shut ourselves in the toolshed and peered into the gently-opening net with our torch… The moth was the shape of a vulcan, practically size of a small bat, and more beautiful than anyone can do justice to: a marbled, lichenous beauty, zig-zagged and pocked and dabbed with greys and whites and blacks and – look! – when those forewings flick open an underwing black and banded with an impossible flash of blue… ‘It’s a Blue Underwing,’ we cried, ‘A Clifden Nonpareil…!’ An entry in my Aurelian’s Fireside Companion describes the experience soberly: ‘For a moment or two we gazed at it in speechless admiration, fearing almost to breathe lest it take flight…’.  I suspect we used a few more expletives than that!   And what a secret to reveal; our first trap in the new wood and we caught probably the best moth we could ever hope to find. One truly without compare.  Soon after the generator packed in; we were plunged into darkness. 2022, it transpires, has been a record year for Clifden Nonpareils, as it has been for many rare moths. Our Nonpareil could have been a wanderer from further south in England where a population has now reestablished itself on aspen and poplar after decades of extinction – or (and I find this the more romantic possibility) it could have been a migrant from the east, flapping its way across the North Sea to our northerly inland wood, and revealing itself, albeit briefly, to its astonished and delighted admirers…  By torchlight, we placed the moth on a tree stump, astounded to see something we’d always dreamt of finding. It sat there for a moment, as though contemplative, then showed a flash of blue petticoat as it shivered its huge and brindled grey wings. Shivered again. And flew off into the night. What will the seasons bring?

As long ago as 1772, it was discovered by the chemist Joseph Priestley that breathing Nitrous Oxide (N2O) could cause interesting effects on the brain - creating a sense of euphoria as well as anaesthesia, analgesia and even amnesia.  More recently the gas has been bottled in canisters and is then transferred to balloons to be inhaled.  Breathing in this gas creates "legal highs" - legal in the sense that inhalation is not illegal although selling "noz" or "whippets" for human consumption to under 18s is illegal.  But they are so popular that one person told me that any party worth attending will have a "Noz Bar" where you can buy canisters to induce their dream-like effects. Indeed these "laughing gas" cylinders became even more popular during the covid lock-downs and became the high of choice, despite the fact that it can be dangerous to take it especially if combined with alcohol or where there is a risk of falling.  Equally disturbingly, the canisters are often discarded and you will often see piles of them outside nightclubs but they are also frequently left on verges and outside woodlands and in public spaces.  To give an idea of the scale of use of nitrous oxide or "noz", it is officially the second most popular drug for 16-24 year-olds after cannabis and according to the ONS 9% of this age group have tried nitrous oxide. It would be hard to completely outlaw the use of these canisters because they are legitimately used in commercial kitchens for making whipped cream - hence the nickname "whippets" - and similar shaped canisters are also used by cyclists for filling repaired tyres.  With the low cost of mass production and large scale imports from China, the wholesale cost of these can be as low as 25p each and they are supplied in large cartons so vast numbers are deposited in the countryside.  It would also be hard to tax these as a technique for reducing consumption but the government seem at least to have considered making illegal their consumption as a recreational drug, but perhaps the biggest driver of consumption is the high profit margins made from reselling these.  A dealer will make a mark-up of 1,000% (ie 10x) and they are low volume so a lot of canisters can be carried by an individual.  Festivals and outdoor events are therefore an attractive place to sell these - so they get into the environment more readily than most containers. These 'silver bullets' of nitrous oxide are designed to be very tough as they contain concentrated gas but the effect of this is that they are almost indestructible and threaten to create a serious nuisance, littering the countryside.  It's possible that these canisters create useful homes for some insects and spiders - a bit like discarded drinks cans and bottles can do, but the effect is surely detrimental to conservation efforts.  Being heavy they are likely to sink into the ground and are hard to collect and they will be a nuisance for gardeners, metal detectorists and foresters.   So, with the rapid build-up of these discarded gas containers into the environment, the question is what on earth can be done about it?         Nitrous oxide has been linked to damage to the nervous system and paralysis.  A recent article details the risks.  

If you have planted new trees and there's been a spell of extremely dry weather, as happened in the summer of 2022, you might be very worried for their survival, but there are several things you can do to increase their chances.  This isn't just a problem for the first season because saplings can be at risk for the first three years after planting; it's also not a binary, live or die thing for your planting - usually some trees will survive and some will perish but the challenge is to maximise the percentage that make it through a drought.  Let's first consider how dry conditions affect trees.  The saplings' first response is often to increase root development to take up more water.  Your young plants will also seek to reduce water loss so the leaves will wilt or can even be shed even though it's only July or August, and this can lead to the saplings not having the ability to photosynthesise adequately.  So you need to do what you can to avoid water loss and, if practical, to apply water. So, to increase the chance of your saplings surviving you can, if practical, actually spread water around them but that may have to be done fairly regularly during the period of drought.  Ideally irrigation should happen overnight when evaporation is lower and that will also limit pest problems and "leaf burn" that may be associated with irrigation in full sun. An additional strategy is to weed the young trees thoroughly to reduce the competition for water.  This can be combined with firming up the soil around the base of your saplings to avoid the soil drying out through fissures.  To reduce evaporation and stop the weeds returning you can use a mulch around the base of your young trees - ideally a mulch mat or by spreading some woodchips or bark. A few weeks after the drought has passed but while the leaves are still on the saplings you can assess your losses and order new trees to replace those that have succumbed to the dry weather.  This process is described by foresters as "beating up" but when it comes to the actual planting this needs to be done carefully - only replace trees that you are sure have died rather than those which just lost their leaves early. For urban trees you can be prepared for a period of dry weather by installing watering tubes or bags which reduce surface run-off and make sure that the water reaches the tree roots.   It is unclear how many millions of trees have been lost to the 2022 drought but it certainly includes many mature trees as well as many newly-planted saplings and hedgerow shrubs.  It seems that droughts like this are part of a process of climate change and more such events are probable - so our woodlands will be under increasing stress over the next few years.  For those who are establishing new woodlands a sensible approach would be to plant only a proportion of the area each year and to select a wide variety of tree species.  It also suggests that for new woodlands you should, where possible, include the adopting of areas of natural regeneration - where trees have come up of their own accord - these self-set trees are likely to be very resistant / resilient to periods of extremely dry weather. [caption id="attachment_38870" align="aligncenter" width="600"] Drought - green shoots of recovery?[/caption]  

It may be that a dead hedge is just that, your once carefully manicured box hedge which has now been ravished by the box moth.  However, in terms of managing your woodland, a dead hedge may have a different meaning. Here, a dead hedge may be a barrier to an area of new planting, it may be a way to ‘persuade’ people to keep to a footpath, or keep away from a pond / stream.   The dead hedge will be made from the bits and pieces that have be culled in clearing and thinning operations within the wood, material that foresters sometimes refer to as ‘lop and top’ and tree surgeons call ‘arisings. It can also include material cut from brambles and climbers such as ivy, honeysuckle and Old Man’s Beard (Clematis). Using natural materials to create barriers (and indeed) a habitat in a woodland is a way of using ‘waste’ in an ecologically sound way.  It saves having to remove trimmings from the site and offers opportunities to ‘top up’ the hedge if desired.  Obviously diseased materials should not be used.   Creating a dead hedge from clippings and trimmings is a way of using natural materials, rather than plastic & other materials that do not readily decompose.  A dead hedge will be an effective barrier for a period of time but it will break down sooner or later as bacteria and fungi break down the woody remains (lignin and cellulose).  The disappearance of the hedge will take time as the branches twigs etc are largely off the ground, so relatively dry and decomposition is facilitated by warmth and wetness. After its initial ‘construction’, the hedge will become part of the woodland, it will be colonised by some plants and it will offer shelter, nesting sites for birds and small mammals, and a ‘home’ to many different invertebrates, such as woodlice, beetles, even certain species of bumblebees.  As the hedge deteriorates, that is, decomposes, so the soil will gain in humus and fertility as the nutrients from the decaying wood etc are released through the detrital food chains.   Another way of using / recycling bits from pruning, clearing etc is by Hugelkultur.   Hugel beds are basically raised beds with a difference - they are filled with rotting wood and other biomass.  They are packed with organic material, nutrients and air pockets. Such beds can be an effective way of creating a productive area for growing fruits and vegetables in your woodland.  There is a woodlands blog about hugelkultur here. Large chunks of wood e.g. sawn up tree trunks can be stacked up in small piles and will over time make an excellent home for many invertebrates but especially xylophagous (wood eating) insects, for example,  saproxylic beetles.  These are beetles that live / eat in dead wood.  In the UK, some 600+ beetle species (from 53 different) families are associated with deadwood. Some feed on the deadwood itself (often with the aid of symbiotic bacteria in their gut), others feed on the fungi that are gradually ‘dissolving’ the wood.  Ants and wasps sometimes make their nests in dead wood.   Using wood to increase the organic content of the soil is good in terms of  carbon sequestration,  improving soil fertility,  water conservation and  productivity.  

There are many reasons to plant trees, but lots of us may not have the resources (experience, time, money or land) we need to get involved with tree planting, even if the desire is very much there.  Fear not!  Getting involved, a little or a lot, is easier than you might think. There are countless reputable tree planting organisations across the UK which provide opportunities and information to those who are keen to get involved, but may not know where to start.  It may be that you don’t have the space (or resources) to plant your own trees, or are a little tight on time but want to contribute where you can.  You may be considering buying land to plant a family woodland and are on the lookout for some guidance and experience beforehand.  Wherever you are coming from, volunteering for a local tree planting project or charity could be a good way to kickstart your tree planting journey.  It’s also a wonderful way to meet like-minded people and make new friends.  Community tree planting is both cost effective and efficient.  Planting up large areas of bare land is not a quick job. Although people are utilising innovative methods for planting trees (such as dropping saplings from helicopters in remote regions), tree planting is generally speaking a labour intensive activity.  Lots of man hours can mean hefty costs too.  But as the saying goes, many willing hands make light work, and so is the case with creating new woodland.  Volunteering bodies can take care of the organisational and logistical elements of a planting project, allowing individuals to step in and learn new skills, connect with their communities and make a positive contribution to our climate. Fifty members of a local community could comfortably achieve the same as a far smaller team of professional foresters.  Of course the spacings may not be quite as consistent, or the stakes quite as straight in the ground, but in the grand scheme of things this doesn’t matter!  The process of planting a young tree can be learned by anyone, of (almost) any age, from any background! Forest For Peterborough, a tree planting organisation in the UK, began with the aim of planting one tree per person in Peterborough, but has now planted over 100,000 trees to date and aims to plant 230,000 by 2030. They also offer education for young people so that they can learn how to make sustainable decisions and attempt to give people ‘opportunities to learn skills and connect with others.’ As well as the opportunities for socialising and meeting others, it is a great way to acquire new skills, confidence and a sense of fulfilment from engaging practically with the environment in which you live.  For those who may not have the time, will or resources to take on their own tree planting project, volunteering alongside others offers could be just the answer.  Getting outdoors and connected with nature is especially important since many of us have been working from home since the pandemic began, which has taken a toll on our essential need as humans to connect with other people and the natural world. [caption id="attachment_38532" align="alignleft" width="300"] redwood seedling[/caption] As well as the social aspect of tree planting, there are a host of benefits associated with increasing the numbers of trees and green in spaces in the communities in which we live. It has been shown that people who interact more with nature are more likely to have a higher sense of self-esteem and be more resilient to stress, whilst reducing other mental health issues such as depression and dementia. For children, contact with nature can positively impact their affective, cognitive and moral development. Children who have views of trees are also more likely to succeed in school, meaning tree planting has both individual and communal benefits. Communities with more well-maintained trees have an involved social capital, too, whilst also reducing ‘violence and aggression in households, and limiting criminal activity in neighborhoods.’ Imperial College found that having high-quality green spaces in an area leads to its residents having a greater attachment to and sense of pride in their community. These all contribute to the overall cohesion of a community, something that we all want for the areas we live in.   Whether you want to meet new people, get more exercise, contribute to your community or be a part of a lasting legacy to help combat a changing climate, finding local tree planting groups could be an excellent step in improving your health, as well as the health of your community and our planet.  There are a huge number of volunteering opportunities across the UK, far too many to list exhaustively here, but please see a selection below which may be of interest: Future Forests Networks: https://futureforestsnetwork.org/ Trees for Cities: https://www.treesforcities.org/get-involved Avon Needs Trees: https://www.avonneedstrees.org.uk/volunteering/ Forestry England: https://www.forestryengland.uk/volunteering Trees for Life:  https://treesforlife.org.uk/support/volunteer/ Trees for Shropshire:  https://treesforshropshire.org.uk/volunteer/ The Northern Forest: https://thenorthernforest.org.uk/get-involved/ The Heart of England Forest: https://heartofenglandforest.org/volunteer Parks for London: https://parksforlondon.org.uk/community-tree-planting/

Even if a tree looks healthy the trunk may be rotten to the core.  One day it will be vertical the next day suddenly horizontal and in falling it can kill people, crush cars and damage buildings.  So, knowing what's under the bark is really important.  Suspicion of rot might have been raised from a fungus, or a die-back of branches, or a hollow sound when the trunk is trapped.  In any event, it's one thing to suspect rot and another to know the exact extent of it and where it is, which is the problem that can be solved by a Sonic Tomograph, which is an ultrasound scan. The tree surveyor puts a series of nails into the tree in a ring around the outside - often about 40-90 cm above the ground - and he/she wires these up to the ultrasound.  The kit illustrated here is a PiCUS (named after the Latin for Woodpecker) made in Germany which can be carried in a small bag the size of a briefcase. For a horse-chestnut tree like this one with a diameter of about 2.5 metres the arboricultural surveyor needed ten nails.  Once these have been banged in through the bark, and the PiCUS wires attached to each one the surveyor then taps each one lightly with a special hammer and this sends sound waves through the trunk to each of the sensors attached to the other nails.  The PiCUS device will measure whether these sound waves are going through good timber, rotten timber or voids.  This then allows the computer to create a detailed and colourful picture of the trunk showing how much rot there is and where it's located in the cross-section. In our case the horse-chestnut tree, which looks fairly healthy, turns out to have rot covering 41% of the cross section.  Anything above 30% suggests the tree is unsafe and in this particular case the tree is overhanging a busy road and pavement so the whole tree will almost certainly need to be dismantled and replaced. Many of the sonic Tomograph surveys are done for local authorities and institutions to protect the public by reducing the risk of falling trees. A single tree only takes about 20 minutes to survey so there is good economy in doing several on each visit.  One official I spoke to said, "one reason we do these PiCUS surveys is so that neighbours and local people can see why we are cutting down trees that they love." The contractor here is Kim Gifford who is based in South East England and is on 07831 488456.  He's a very experienced surveyor and also spotted another rotten tree on his visit - a Tulip tree - which he surveyed and showed that it too needs to be cut down, sadly.  An alternative, in some circumstances is to take off the whole branch structure and turn the tree into a monolith, though in most circumstances it's better to eliminate the tree and start again with planting a new tree.

Every year humans release 40 billion tons of greenhouse gases (like methane) and carbon dioxide (CO2) into the atmosphere, something that needs to change if we’re going to stop the effects of climate change from worsening. As we all learned in science class, trees remove carbon from the atmosphere during photosynthesis, making planting them an excellent way to offset our carbon emissions. The carbon offset of one tree (at maturity) can be up to 22lbs per year during its first 20 years of growth, meaning a hectare of trees removes between 5 and 45 tons of carbon in the same timespan.  In England, the government plan to plant 180,000 hectares of trees by the end of 2042 as a means of reaching their goal to become carbon neutral by 2050. The question is, where should these trees be planted and how can the public help to reach this target by planting trees themselves? Right tree in the right place In the coming years it might be tempting to encourage, on an individual and national level, as much tree planting as possible in order to backtrack the effects of climate change, but tree planting needs some consideration in order to offset carbon emissions, taking into account which species, or combination of species, can store the most carbon and which areas are the best for planting. There are certain places where trees shouldn’t be planted, not just because they might interfere with our homes and infrastructure, but because planting trees in these areas could actually have a negative carbon impact. One example of this is Scotland’s peatlands, which hold 20 times more carbon than the UK’s forests; planting trees in these areas would necessitate their draining, and result in more carbon being released than the forest planted would be able to absorb.  [caption id="attachment_34388" align="aligncenter" width="650"] Stream flowing through peat moorland[/caption] Instead, trees should be planted in areas where they will benefit the surrounding area and be able to store the most carbon. Luckily there are lots of low-risk areas available for planting trees to offset carbon in the UK, such as low-quality agricultural land, marginal land or existing forests that are under managed. Around 1/3 of carbon sequestration needed for the country to become carbon neutral by 2050 could come from improving the management of existing forests by encouraging carbon storage and resilience in existing trees and helping younger and better trees to thrive.  Planting trees on agricultural or ex-agricultural land can have similar benefits. [caption id="attachment_38247" align="aligncenter" width="675"] Carbon impact of tree planting[/caption] Urban tree planting There are also potential benefits to afforestation and tree restoration in urban areas. Global warming has come with the rise of urbanisation, causing tree coverage to become sparser in urban areas. As trees have a cooling effect, cities have become hotter, developing ‘heat islands’ where roofs and dark construction materials absorb solar energy and radiate it back. Planting trees in areas with asphalt can reduce this warming, and provide more shade and water. Afforestation to reduce air pollution is an effective strategy in urban areas, as trees absorb pollutants.   Be aware that certain species, such as Eucalyptus and Pines, emit high volumes of volatile organic compounds (VOCs) in particular environments, such as when combined with high temperatures and high nitrogen oxide concentrations (i.e. urban centres), so can contribute to the formation of ozone and carbon monoxide.  Tree planning in urban areas should prioritise increasing the number of low-VOC emitting trees and those with long life spans that require minimal maintenance.  Which species to plant? No matter where you’re planting trees, planting native species is often encouraged; those which have been a part of the UK ecosystem for thousands of years.  In the UK broadleaf species are native, and some species, such as oak and beech, have huge carbon storing potentials as they grow slowly, locking in significant volumes of carbon over time. Though some tree planting schemes have favoured faster growing trees like Sitka Spruces (as these will offset carbon more quickly), they may not yield such long term benefits over a longer timeframe.  An important factor is not how fast a tree grows, but how much carbon it’s able to store when it reaches maturity.  It is also important to grow a diverse range of tree species in order for a forest to be efficient at offsetting carbon. Biodiverse forests store twice the amount of carbon as monocultural forests, so growing a combination of species such as broadleaves and Sitka Spruce will allow for more carbon to be fixed; with each tree species introduced to an area, there is an increase in 6% of its total carbon stocks. Different species grow at different heights and speeds, so this will provide more tree coverage and have short and long term carbon offset benefits, as well as providing habitats for a larger range of animals and improving the soil and climate conditions.  [caption id="attachment_38248" align="aligncenter" width="675"] Carbon impact of tree planting[/caption] Get planting! As you can see, planting trees has great potential to offset carbon emissions, but where we plant trees and what types of trees we plant defines just how effective trees can be at storing carbon. Whether you’re planting trees in your back garden or buying land to plant trees, it’s worth considering which species of tree you’re planting and whether the land is suitable for planting, ensuring the project has the best chance possible of removing carbon from the atmosphere!