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Studie av egenskaper och etableringsförmåga för tallplantor odlade i torv blandad med industrihampa.
Full text linkI takt med en ökande medvetenhet om pågående klimatförändringar och med växande kritik mot användning av torv i odlingssamanhang har behovet av alternativa odlingssubstrat blivit allt större. Skogsplantproducenterna vill därför hitta odlingssubstrat som orsakar lägre utsläpp av koldioxid till atmosfären. I denna studie undersöktes morfologiska egenskaper och vitalitet hos plantor som föregående säsong odlats fram i en blandning av industrihampa och torv och därefter lagrats inför den kommande odlingssäsongen. Dessutom undersöktes plantornas etableringsförmåga genom utvärdering av rötternas och skottens tillväxtkapacitet vid testodling i kontrollerad miljö.
Materialet bestod av tallplantor som odlats i antingen 100 procent konventionell odlingstorv, i en blandning bestående av 50 procent grovmalen industrihampa och 50 procent torv eller i en blandning av 50 procent finmalen industrihampa och 50 procent torv. Industrihampaodlade plantor uppvisade inte samma goda egenskaper som plantor odlade i konventionell torv. De plantor som odlats fram i 100 procent konventionell torv hade jämnast viktfördelning mellan rot och skottdel. Detta kan jämföras med de plantor som odlats fram i de två substraten med blandningar av industrihampa och torv som hade en något högre andel av den totala vikten i skottdel, dock fortfarande med den största andelen i sin rotdel.
Vid testodlingen hade plantor framodlade i konventionell torv en statistiskt signifikant högre tillväxt än plantor som framodlats i de två industrihampa- och torvblandningarna. Efter fyra veckors testodling hade plantorna som odlats fram i 100 procent torv haft den bästa höjdtillväxten (i genomsnitt 3,0 cm per planta) och rottillväxten (i genomsnitt 0,569 g per planta). Plantor odlade i blandningen med 50 procent grovmalen industrihampa och torv hade bättre skottillväxt (2,6 cm) och rottillväxt (i genomsnitt 0,582 g per planta) jämfört med plantor som odlats fram i en blandning av finmalen industrihampa och torv där motsvarande tillväxt var 1,5 cm respektive 0,349 g per planta odlade i detta substrat. Dödligheten efter fyra veckors testodling var lägst (4 procent) för plantor som odlats i substratet bestående av en blandning av grovmalen industrihampa och torv, medan substratet bestående av konventionell torv hade den högsta dödligheten (9 procent). För att kunna reducera och på sikt eliminera torvanvändning krävs ytterligare studier för att utvärdera lämpliga alternativa odlingssubstrat för skogsplantor.As awareness of ongoing climate change increases, along with criticism of peat use in horticulture, the need for alternative growing substrates has become urgent. Therefore, forest tree seedling nurseries are working to find alternative growing substrates that cause lower emissions of carbon dioxide. This study examined the morphological characteristics and vitality of seedlings cultivated in a mixture of industrial hemp and peat followed by cold storage in late fall and early winter. The seedlings' potential ability to establish after outplanting was also tested through a controlled-environment root and shoot growth capacity test.
The material consisted of pine seedlings, grown during previous season, in either 100% conventional peat, or in a mixture of 50% coarsely ground industrial hemp and 50% peat, or in a mixture of 50% more finely ground industrial hemp and 50% peat. Seedlings cultivated in mixtures containing industrial hemp did not exhibit the same characteristics as those cultivated in conventional peat. Seedlings cultivated in 100% conventional peat had the most balanced weight distribution between roots and shoots. In contrast, seedlings cultivated in the two hemp-peat mixtures had a slightly higher proportion of total weight allocated to the root section, however still with the largest portion in the shoot section.
Following the four-week cultivation test, conventional peat seedlings had the largest height growth (3.0 cm per seedling) and root growth (on average 0,569 g per seedling). The difference was statistically significant when compared to seedlings grown in the two hemp-peat mixtures. Seedlings grown in the coarsely ground hemp mixture performed better (height growth 2.6 cm per seedling and root growth 0.882 g per seedling) than those in the more finely ground hemp mixture (height growth 1.5 cm per seedling and root growth 0.349 g per seedling). Mortality after four weeks of test cultivation was lowest (4%) for seedlings grown in the coarsely ground hemp-peat substrate, while the conventional peat substrate seedlings had the highest mortality (9%). To be able to reduce, and eventually eliminate the use of peat, additional studies are necessary to evaluate the most suitable materials and mixtures available as substrates for cultivation of forest tree seedlings
Vattholma Sommartorg och centrumutveckling
Full text linkDetta arbete handlar om programmeringen av ett temporärt sommartorg i Vattholma, en mindre ort i Uppsala kommun. Projektet initieras av det lokala bygderådet Vattholma i samverkan och är ett samarbete mellan dem, mig som landskapsarkitektstudent och Uppsala kommun. Projektet använder tillfällig arkitektur och lokal delaktighet som verktyg för att skapa mötesplatser och synliggöra behov i utvecklingen av ortens offentliga miljöer. Arbetet undersöker hur urbana metoder inom landskapsarkitektur kan anpassas till den lilla ortens förutsättningar, där ortens karaktär, behov och strukturer skiljer sig från det urbana sammanhang där metoderna vanligtvis används och utvecklas. Arbetet är viktigt då kunskap och metodik om arkitektoniskt arbete på mindre orter är mycket liten trots att de svenska småorterna är många.
Genom en aktionsinriktad ortsanalys, litteratur- och referensstudier samt lokal dialog har projektet utvecklat både en teoretisk förståelse och en praktisk programmeringsstrategi för sommartorget. Arbetet visar att mindre orter, som Vattholma, kräver en hög grad av platsanpassning och lokal förankring i utvecklingsprojekt och att temporär arkitektur kan utgöra ett användbart steg mot permanent gestaltning, inte bara i städer utan också på mindre orter.
Tre principområden identifieras som bärande för långsiktigt behovsmötande i Vattholmas offentliga rum: en tydliggörande centrumgradient längs huvudgatan, en synlig centralpunkt med offentlig mötesplats samt ett omkringliggande, sammankopplat aktivitetsstråk för vistelse. Behoven och förutsättningarna bakom dessa tre principlösningar har stora likheter med generella småortsföreteelser och kan potentiellt även fungera som utgångspunkt för andra småorter i Sverige, och föreslås som en möjlig metodisk modell.
Det temporära sommartorgets programmering bidrar i direkt verkan med att skapa den offentliga mötesplats som Vattholma saknar och med att synliggöra centralpunkten. Då analysen visat att stark identitet och potential till stora vistelsekvaliteter finns i torgets närhet föreslås att den temporära installationen spiller ut över några av dessa ytor för att uppmärksamma både dess enskilda potentialer samt vinsten av ett sammankopplat stadsnät med olika platser som kompletterar varandra.
Genom flyttbar möblering och möjligheten till omprogrammering under säsongen skapas med Vattholma sommartorg ett laboratorium för samskapande och utvärdering. Projektets styrka ligger i det breda samarbetet och den lokala förankringen, där programmeringen inte enbart ses som en fysisk form utan som en del i en demokratisk och lärande process. Arbetet visar att temporär arkitektur inte bara kan bidra med fysiska förbättringar utan också kan stärka den sociala hållbarheten i mindre samhällen genom ökad delaktighet och lärdomar inför utveckling av offentliga platser som är väl förankrade hos såväl medborgare som kommun.This project is about the design of a temporary summer square in Vattholma, a small town in Uppsala municipality, Sweden. The initiative was brought up by the local town council Vattholma i samverkan and is a collaboration between them, myself as a landscape architecture student and Uppsala muncipality. The project uses temporary architecture and local participation as tools to create meeting points and highlight needs for development in Vattholmas public spaces. This work investigates how urban methods within landscape architecture can be adapted to conditions of smaller towns where caracter, needs, and structures differ from the urban contexts in wich these methods usually are developed and applied. The work is important since knowledge and methodology for architectural practice in small towns is scarce, despite the fact that a large number of Swedish settlements are non urban.
Through an action-based location analysis, litterature and reference studies and local dialogue, the project has developed both a theoretical understanding and a practical design strategy for the summer square. The result show that small towns, like Vattholma, requires a high degree of site-specific adaptation and local anchoring in development projects. And that temporary architecture can serve as a useful step toward permanent design, not only in cities, but also in smaller communities.
Three core principles have been identified as central to meeting long-term needs in Vattholma’s public spaces: a clarifying central gradient along the main street, a visible central point with a public meeting place, and surrounding, interconnected activity spaces for everyday use. These strategies reflect challenges common in many small towns and may serve as a transferable model for similar contexts.
The summer square contributes directly by creating the public meeting place that Vattholma currently lacks, and also by highlighting the central node in the village. Since the analysis revealed strong local identity and a high potential for public life in the immediate surroundings of the square, the design proposal suggests that the installation should include adjacent areas to draw attention to their individual potentials as well as the benefits of a connected spatial network with complementary public places.
Through movable furniture and the possibility of redesign throughout the season, Vattholma Sommartorg functions as a living laboratory for spatial evaluation. The project´s strength lies in its participatory process and the flexible design that supports local learning and engagemant.
This work shows that temporary architecture can not only contribute to physical improvements but also to increased participation and insights for development well rooted in both citizen and municipal perspectives
The consumption of discounted close-to-date foods in the contexts of food provisioning and waste
Full text linkThis thesis explores the consumption of food approaching its best before or use-by date marking that is purchased at a discount, (discounted close-to-date foods). The study relates to the implementation of price promotions as a food waste reduction measure at the retail level. The expansion of this phenomenon in recent years is problematised in terms of the lack of knowledge surrounding its impacts on food waste at the household level. Using a practice theoretical approach that recognises six distinct moments of consumption, the thesis used interviews to focus on the consumer experience of this phenomenon, elucidating how a group of 15 individuals living in Sweden fit these products into their everyday food provisioning practices.
The findings demonstrate that motivations of thrift encouraged the interviewees’ consumption of discounted close-to-date foods and that flexibility permeated food provisioning, (e.g., planning, shopping, cooking, eating) with these items. In association with knowledge and skills related to date marking and risk, this allowed the interviewees to include discounted close-to-date foods in their everyday lives. In relation to the impacts of this consumption on household food waste, the findings depict three different scenarios in which discounted close-to-date foods are: completely used; partially used; or completely wasted.
The case is made for further research to investigate and evaluate this relatively young phenomenon. The implementation of such interventions must be supported by evidence that they reduce food waste at a food system level, not merely shift food waste to actors up- or downstream the food supply chain. This thesis illustrates the intricacies and interconnectedness of food provisioning practices, the contexts surrounding them and their role within societal issues of food waste. It contributes to research concerned with the links between retail level interventions and household level consumption whilst highlighting some of the complexities that challenge efforts to reduce food waste at these levels. Finally, the study concludes that this intervention at the retail level is reinforcing existing consumer beliefs around date markings and food quality and safety, and questions the role of retailers in contributing to systemic waste reduction
The short-term effects of thinning in Norway spruce stands in Sweden on bilberry flowering
Full text linkBilberry (Vaccinium myrtillus) is a foundation species in Swedish forests, providing forage for herbivores and fulfilling many services and functions in the ecosystem. However, bilberry cover has declined in recent decades in Sweden, partly due to dense and dark timber production stands. This study examines the short-term effects of different thinning treatments in Norway spruce (Picea abies) stands on the flowering of bilberry in southern Sweden. Three thinning treatments were applied: 60% basal area removal, 30% basal area removal - imitating standard silvicultural practices in Sweden, and a control with no thinning. Bilberry flowering was assessed before the treatments were applied, and one year after thinning. Data on the number of flowers and unopened flower buds was collected from 1,286 bilberry ramets across 66 plots distributed over nine different stands. According to expectations, one year after thinning, the number of flowers in plots with 60% thinning was significantly higher compared to the other treatments. Unexpectedly however, flowering was lower in general that year compared to the previous year, likely due to weather factors and interannual cycling in bilberry reproduction. Interestingly, the number of flowers in plots with 60% thinning did not significantly change between both years, while it drastically decreased in plots with 30% thinning and control treatment. The soil C:N ratio did not influence the flowering response. Only 11.5% of the variation in flowering could be explained by basal area, suggesting that other environmental factors, like microconditions, soil moisture, or understory competition, may play a role. These results show that standard thinning practices may not be sufficient to support bilberry populations in Norway spruce stands. Higher thinning intensities may help to support bilberry on the forest floor and by that also support biodiversity, improve forage availability for herbivores, and increase ecosystem services like berry picking
The effects of mechanical site preparation and fertilization on planted birch seedlings in southern Sweden
Full text linkThe production forestry in southern Sweden is dominated by Norway spruce (Picea abies), a species that in recent years has suffered from damage related to climate change. There is a need to diversify the species composition to create more resilient production forests. One suitable species for this is silver birch (Betula pendula). Birch is fast growing, produce good quality wood and grows well in the same site conditions as the spruce.
Regardless of species, site preparation and fertilization could be helpful aids to achieve a successful regeneration, giving the seedlings the best possible conditions to grow and survive.
There is a lack of research on how to best regenerate birch for quality timber e.g. best site preparation method and effect of early fertilization, two aspects of regeneration investigated in this thesis. Birch seedlings at two sites in southern Sweden were measured and analysed. Both locations had identical experimental plots treated with different site preparation methods, both fertilized and unfertilized.
The results in this thesis show a significant advantage of planting in soil treated with soil inversion compared to disc trenching and untreated control in terms of height growth and survivability. However, soil inversion is expensive, and the economic benefits from better growth and less mortality must be weighed against cheaper site preparation methods for it to be a viable option for forest owners
Grönare och skönare på Kungsängsgatan i Uppsala
Full text linkI detta projekt föreslås en omgestaltning av en del av Kungsängsgatan i Uppsala. Gatan föreslås bindas ihop tydligare med omkringliggande strukturer och därmed utöka stadskärnan något. Gestaltningsförslaget bygger på sex gestaltningsprinciper, koppling, tempo, växter och dagvatten, karaktär, trafik och sittplatser, som har arbetats fram under analysarbetet. I korta drag har gatan fått fler funktioner genom att omvandlas från traditionell gata till shared space - bilarna har fått mindre yta och till exempel grönska, uteserveringar och utrymme för sociala möten har fått mer plats. Tanken är också att öka trevnaden, främja folklivet och få en gata som är bättre anpassad att möta klimatförändringar. Gatan har delats in i fyra delar. De har gestaltats olika beroende på läge och funktion. De två södra kvarteren har stora likheter medan de två norrut har olika karaktär. Mitt i området kommer den nya spårvägen att korsa gatan.
En del av projektet har varit att välja växter för att generera ekosystemtjänster och mildra effekten av klimatförändringarna samt skapa trevnad och estetiska värden. Växtvalet är viktigt utifrån ett klimatperspektiv, men är inte helt enkelt. Det är naturligtvis viktigt att välja rätt växt på rätt plats. En utgångspunkt är att använda växter som är naturliga i våra ekosystem och som inte kommer ta över och sprida sig ohämmat.
Trädens främsta funktion är att öka krontäckningen på platsen, men eftersom gatan har en begränsad bredd har även mindre träd valts med andra funktioner som häftig vårblomning och höstfärger. Dessutom har en inhemsk art valts för att gynna den biologiska mångfalden. Perennerna och lökarna har valts för att fungera i en mix som ger lång blomningstid som uppskattas av både människor och insekter. Mixen har skapats i enlighet med naturalistic planting design, enligt Nigel Dunnetts metod.
Resultatet visar att det går att stöpa om Kungängsgatan och bryta det gamla mönstret med en klassisk stadsgata utan att förändra mötet mellan byggnader och gata. Det går inte att garantera att förslaget kommer att leda till mer folkliv och livskraftiga verksamheter men det bör skapa bättre förutsättningar för en attraktiv gatumiljö.This project proposes a redesign of a section of Kungsängsgatan in Uppsala. The goal is to strengthen the connection between the street and surrounding structures, thereby extending the city centre slightly. The design proposal is based on six guiding principles developed through site analysis: connectivity, rhythm, planting and stormwater, character, traffic, and seating.
In essence, the street is given new functions by being transformed from a traditional street into a shared space. Vehicular space has been reduced in favour of greenery, outdoor seating, and areas for social interaction. The intention is to enhance comfort, promote public life, and create a street better adapted to climate change. The street is divided into four segments, each designed according to its specific location and function. The two southern blocks share similar characteristics, while the northern sections have different identities. A new tram line is planned to intersect the street at the centre of the area.
One important aspect of the project has been the selection of plants to generate ecosystem services, mitigate the effects of climate change, and contribute to comfort and aesthetic value. While plant choice plays an important role from a climate perspective, it is not without challenges. Naturally, it is essential to place the right plant in the right location. A key starting point has been to use species that are ecologically appropriate and unlikely to become invasive.
The primary function of the trees is to increase canopy cover, but given the street’s limited width, smaller trees with other qualities—such as vibrant spring flowering and autumn colour—have also been selected. Additionally, a native species was chosen to support biodiversity. Perennials and bulbs have been selected to work as part of a planting mix that ensures a long blooming season appreciated by both people and pollinators. The mix follows the principles of Naturalistic Planting Design (Dunnett 2019), according to the method developed by Nigel Dunnett.
The results show that it is possible to reshape Kungsängsgatan and break with the traditional pattern of car-dominated streets without having to reshape existing buildings. While it cannot be guaranteed that the proposal will lead to increased public life or more vibrant businesses, it will at least provide reasonable opportunities for a more attractive and resilient street environment
Feel the heat
Full text linkFire plays a critical role in shaping forest ecosystems, influencing biodiversity, nutrient cycling and
vegetation structure. Understanding the factors that control fire temperature is essential, as fire
strongly affects ecological outcomes such as regeneration and habitat composition. In particular, the
interaction between fuel characteristics, weather conditions and fire temperature remain
insufficiently understood, especially in the oak-dominated forest of Scandinavia.
This study aims to investigate how variations in weather and fuels influence temperature variability
during fires through: (1) calibrating the range of temperatures and respective residence times
observed during experimental fires in oak-dominated forests, (2) evaluating the relative importance
of weather conditions and fuels upon temperature during fires, and (3) ranking different fuel types
in respect to their impact in fire temperatures.
Using a field-based experimental approach, and controlled burns at six locations in southern Sweden
we collected data on fuel composition, fire temperature and concurrent weather variables. Analysis
was made using Principal Component Analysis and Random Forest regression models.
The results show that fuel characteristics, especially the presence and biomass of Calluna (Calluna
vulgaris L.), are the strongest predictors of maximum and cumulative fire temperatures. From 100
g/m2 of Calluna the fire temperatures increased rapidly and plateaued after. The more biomass of
Calluna the higher the fire temperatures were, mainly in the range of 700ºC. Weather variables, such
as relative humidity, mean temperature and wind speed, also influenced temperature but to a lesser
extent. Notably, mid-range humidity levels (55%) were associated with prolonged heat durations,
likely due to increased smoldering.
Results of this study support the development of more flexible and ecologically informed prescribed
burning strategies in Swedish forests through bringing new insights into the complex dynamics
between fuel types, weather and fire temperature
The meaning of outdoor environments to older people with home care services
Full text linkWelfare systems in Sweden and the rest of the world are facing vast challenges due to an increasing older population. With aging comes physical limitations, thus an increased need for home care. For older people, outdoor environments - especially natural ones - enable meaningful activities, socialising, and have positive effects on well-being. Many older people perceive environmental obstacles in relation to the outdoor environment, and a fit between the person and the environment is especially important to older people.
The aim of this study was to explore the use and experience of outdoor environments among older people with home care services. Five semi-structured interviews were conducted and analysed with meaning condensation. The analysis resulted in three interrelated themes: Using and experiencing the outdoor environment, Meaning of early life experiences and habits and Enabling use and experience. It was found that the use and experience of outdoor environments consist of a variety of activities, environmental qualities, and impressions and feelings related to these. Many of the important aspects correlated with previous research and theory on older people. It was found that nature is important for well-being through enjoyment of as well as relaxation and comfort. The outdoor environment is important for socialising and being part of community and aspects of caring for others and feeling cared for by the community. It is important for keeping meaningful habits and outdoor experiences earlier in life may provide tools to manage the outdoor environment in present time. The findings suggest that there are physical obstacles to person-environment fit, such as difficulties getting through the door, as well as subjective aspects such as fear of falling. In addition, it was found that getting outside independently is essential to the participants.
The findings from the present study are in contrast with some literature suggesting that older people have and increased need for restoration, social selectivity and withdrawal. It was found that the needs and wishes of the participants reflect those of older people in need of stimulation, with difficulties getting outside independently due to physical limitations. From the results, a proposed universal approach and a model to inspire decision-makers, planners and home care staff to sustainable solutions for outdoor activity was presented. The author proposes that sustainable solutions that enable getting outside independently can contribute to societal goals such as fall prevention, decreased loneliness, and well-being among older people.
More research is needed on the use, and experiences, needs and wishes related to outdoor environments among older people with home care. It is important to study the subjective sides of person-environment fit and, the meaning of social interaction outdoors, to motivate universal approaches, promotion of well-being and prevention of loneliness. In addition, knowledge is needed on older people’s perceived function in society in relation to the outdoor environmen
Local disposal of heavy metals from traffic, using a methodical plant selection
Full text linkI denna kandidatuppsats problemet angående utsläppen från bilvägar, mer specifikt tungmetall utsläppen och hur man kan bearbeta dem med hjälp av växter undersökts. Kandidatskrivarna har läst och analyserat studier angående forskning inom ämnet fytoremediering (vilket är användningen av växters förmåga att bearbeta gifter) i anknytning till vägar och tungmetaller. Mycket av det som har analyserats och använts i kandidaten är studier från andra länder än Sverige. Det beror på att det inte har utförts forskningsstudier kopplade till fytoremediering i anknytning till vägar i Sverige. Det visade sig för övrigt vara mycket globalt vedertaget med studier som visar på hur effektivt det kan vara att använda sig av växter för sanering av tungmetaller. Studierna som hittades var från Pakistan, Algeriet, Kina, Polen och Norge. Dessa studiers metod och resultat har analyserats för att sammanställa en växtlista som är anpassad för bruk i Sverige. Då fytoremediering är ett så globalt vedertaget ämne undersöktes många olika arter av växter vilket genererade en växtlista på 47 arter. En del av de studerade växterna är giftiga, samt att växter som planteras på kontaminerad mark på sikt blir giftiga, leder till debatt. Bland annat har förslag på framtida forskning inom Sverige diskuterats fram i uppsatsen då inga tidigare studier har gjorts kopplade till vägar. Fytoremediering är ett viktigt ämne som studien vill trycka på och skapa diskussion för att kunna underlätta grönplaneringen och saneringen av urbana miljöer.This bachelor's thesis examines the problem of emissions from roads, more specifically heavy metal emissions and how they can be processed using plants. The bachelor's thesis writers have read and analyzed studies regarding research in the subject of phytoremediation (which is the use of plants' ability to process toxins) in relation to roads and heavy metals. Much of what has been analyzed and used in the bachelor's thesis are studies from countries other than Sweden. This is because no research studies have been conducted related to phytoremediation in relation to roads in Sweden. It also turned out to be very globally established with studies showing how effective it can be to use plants for the remediation of heavy metals. The studies found were from Pakistan, Algeria, China, Poland and Norway. The studies method and results were analyzed to compile a plant list that is adapted for use in Sweden. Since phytoremediation is such a globally established topic, many different species of plants were investigated which generated a plant-list of 47 species. Some of the plants studied are poisonous, and the fact that plants planted on contaminated soil will eventually become poisonous leads to a debate. Among other things, proposals for future research in Sweden have been discussed in the essay, as no previous studies have been conducted linked to roads. Phytoremediation is an important topic that this study wants to highlight and create discussions in order to facilitate green planning and remediation of urban environments
Alternative species to invasive garden plants in Sweden
Full text linkMed den ökade globala handeln har många arter etablerat sig i nya miljöer där de inte hör hemma.
Några av dessa arter är invasiva och hotar den biologiska mångfalden i Sverige samt skapar
problem. Invasiva trädgårdsväxter sprider sig främst via konsumenter som införskaffar dem för
deras tillfredsställande egenskaper. Forskningen är enig om att utbildning hjälper till att öka
medvetenheten om invasiva arter bland konsumenter. I linje med detta följer föreliggande studie
andra länders riskhanteringsstrategier genom att identifiera ersättningsväxter till invasiva arter för
att lyfta fram möjligheten till att ha en trädgård helt fri från invasiva arter.
Studien omfattade 29 växtarter som idag klassas som invasiva i Sverige enligt SLU
Artdatabankens senaste riskklassificeringslista. Arterna valdes slumpmässigt, baserat på deras
tillgänglighet på den svenska marknaden. Av dessa var fyra vedartade och 25 örtartade. Totalt
identifierades 33 möjliga ersättare, varav 31 var inhemska och 2 främmande. De främmande
arterna valdes från den så kallade ”Gröna listan”, växter som för närvarande inte utgör någon risk
för spridning. Varje invasivt släkte tilldelades upp till fyra ersättningsarter, rangordnade efter
lämplighet, där rang 1 motsvarar det mest passande alternativet. I flera fall fick släkten med
likartade egenskaper dela på samma ersättningsarter.
Resultaten visar att ersättningslistan är en möjlig väg framåt för att stoppa spridningen av invasiva
arter. Därför bör den anpassas till olika typer av konsumenter och testas i praktiken för att
utvärdera hur väl den tas emot. Det är också viktigt att detta sker i samarbete med aktörer inom
trädgårdsnäringen för att minska risken för konflikter och säkerställa tillgången till dessa
ersättningsarter på marknaden. Samtidigt finns ett behov av att vidareutveckla metoden för att
bättre förstå vilka växtegenskaper som är viktiga för trädgårdsägare och vilka egenskaper de
faktiskt prioriterar.With the expansion of global trade, a lot of species have ended up in new places where they don’t
belong. Their introduction poses a significant threat to Sweden’s biodiversity and causing a bunch
of issues. Invasive species primarily spread through consumers who acquire them for their
functional properties. Research agrees that education helps raise awareness about invasive species
among consumers. In line with this, this study follows other countries risk management strategies
by identifying alternative plants for invasive species to highlight the possibility of having a garden
entirely free from harmful species.
The study identified alternatives to 29 species currently classified as invasive in Sweden,
according to SLU Artdatabanken's latest risk classification list. The species were selected
randomly, based on their availability on the Swedish market. Of these, four were woody species
and 25 were herbaceous. A total of 33 potential substitutes were identified, of which 31 were
native and 2 non-natives. The non-native species were selected from the "Green List", which
includes plants that currently pose no risk of spreading. Each invasive genus was assigned up to
four alternative species, ranked according to suitability, with rank 1 representing the most suitable
alternative. In several cases, genera with similar characteristics shared the same alternative
species.
The results show that the alternative list is a potential way forward to halt the spread of invasive
species. Therefore, it should be adapted to different types of consumers and tested in practice to
evaluate how well it is received. It is also important that this takes place in collaboration with
stakeholders in the horticultural industry to reduce the risk of conflicts and ensure the availability
of these alternative species on the market. At the same time, there is a need to further develop the
method to better understand which plant characteristics are important to garden owners and which
traits they actually prioritise