Sibbaldia - the Journal of Botanic Garden Horticulture (Royal Botanic Garden Edinburgh Journals)
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The cultivation of Primula palinuri Petagna for ex situ conservation: lessons learned from the Royal Rotterdam Zoological and Botanical Gardens
Get PDFPrimula palinuri Petagna is an endangered species endemic to a tiny coastal area in southern Italy. Investigating the possibility of growing and propagating this endangered species with ex situ actions should be encouraged, as this could provide a second line of security for rare plants by allowing specimens to be grown in the absence of natural environmental challenges. Currently, the Royal Rotterdam Zoological and Botanical Gardens (RRZBG) hold 31 accessions of P. palinuri, which represents an ex situ collection with potential value for conservation programmes. Over the years, horticulturists at RRZBG have created a solid protocol to produce viable seeds through hand-pollination techniques, thus allowing conservation programmes for this species to become more effective. In this article the cultivation of the species is described, including information on seed germination, general maintenance, cultivation to flowering stage and propagation from the resulting seeds
SHORT NOTE Air layering as a propagation method in glasshouse cultivation
Get PDFThe glasshouse renovation works being undertaken at the Royal Botanic Garden Edinburgh (RBGE) as part of the Edinburgh Biomes Project (2020–2027) pose a number of challenges to the horticulturists managing the plant collections. The grandeur of many of the larger specimens and the limit of available space are the most prominent of these. Air layering is a propagation method that until recently has not been used widely at RBGE. It has however proven to be a successful technique to maintain the genetic diversity of the collection while reducing both the need for space in propagation glasshouses and the level of aftercare required once propagation is complete. This Short Note explains the method used and highlights several successful propagations, illustrated with images, along with suggestions for implementing the method in the future
Quantifying endangerment value: a promising tool to support curation decisions
Get PDFBotanic garden collections are increasingly seeking to quantify and improve the value of their collections for science, horticulture, conservation and other uses. Quantifying the value of a collection depends on the mission of the institution. Many botanic gardens are prioritising the conservation of rare and threatened species towards preventing plant extinctions. In doing so, botanic gardens must make decisions about which plants should remain, be replaced or be added to their collections, and how to allocate staff and resources to care for individual plants, while considering funding and space limits. So, how can curators make the biggest impact towards conserving plant species? We present a promising method to quantitatively assess which plant species might be higher or lower conservation priority to an ex situ collection, using what we term ‘endangerment value’ – the value of collections for preventing plant extinction. We apply this method to four genera of high importance at The Morton Arboretum and showcase advantages of this approach as well as pitfalls. We found this method useful for priority setting, but note that the inclusion and exclusion of different data and how they are weighted impacts the ranking of priority species – an important lesson for any prioritisation method. We hope this method will inspire and help other botanic gardens to evaluate their current and future endangerment value and set priorities for maintaining and growing ex situ collections globally
STUDENT PROJECT Conservation of Zostera marina: evaluating the effectiveness of seed storage conditions for restoration
No full textZostera marina is a seagrass species that acts as an ecosystem engineer, creating biodiversity-rich habitats that offer important ecosystem services. The species is, however, in decline across its range owing to environmental change and anthropogenic impacts. Conservation work includes the use of seeds and shoots to restore seagrass meadows, although ex situ storage of Z. marina seeds is a small area of research and there is no one set protocol. This study investigated the effects of salinity and temperature on the maintenance of dormancy and viability of Z. marina seeds during cold storage. Seeds were stored at 1 °C and 4 °C, in a range of salinity solutions (20, 30, 40, 50, 60 and 70 psu) over a period of 112 days. Results were collected by a velocity-based viability test at 28-day intervals, with seeds categorised as either viable, non-viable or germinated. Over the course of the storage period, results indicated that low salinities (20, 30, 40 and 50 psu) would exhibit premature germination during storage as well as loss of viable seeds at either temperature, while 60 and 70 psu groups have zero germinations and the highest viable seed number is found in 70 psu groups. Analysis revealed that overall temperature was only statistically significant in relation to viable seeds at 1 °C, suggesting that this is the better temperature to maintain viability. The study indicates that low salinity should be avoided for Z. marina seed storage; instead, a salinity solution of 70 psu at 1 °C storage for up to 4 months could ensure seed dormancy is unbroken and few seeds become non-viable. Overall, results from this study were used to create a simple storage protocol that could contribute to community-based restoration projects
The IDEA Center for Public Gardens: programmes empowering positive change
Get PDFPublic gardens as cultural institutions must be spaces that put human connection and a sense of belonging at the centre of the organization if they want to be relevant in an increasingly socially aware society. We have a responsibility to do better and right the harmful and exploitative wrongs of the past that continue to uphold systemic inequities. Public gardens can uplift communities around us and expand the identity of who we are and who we serve, without abandoning or shaming historical legacies.
The IDEA Center for Public Gardens™ (the Center) was launched January 2022 as a partnership between Denver Botanic Gardens and the American Public Gardens Association, with support from the Institute of Museum and Library Services (IMLS MG-249862-OMS-21). Its aim is to empower public gardens to prioritize and champion diversity and inclusion initiatives within our industries and beyond. Living and working from the principles of IDEA can be an incredibly enriching and uplifting experience, and a journey to be celebrated. The Center does this by offering intensive peer-to-peer cohorts to develop practices, fund scholarships and speakers at conferences and symposia, and building alliances and partnerships to create collaborative unity across cultural institutions. A case study is included here describing how Naples Botanical Garden Florida incorporated IDEA principles into its annual theme for a year-round initiative to welcome new audiences and enhance staff inclusion in botanic garden activities. The Center is a call to action and an invitation to help improve the world one change at a time
Raising Rarity: creating meaningful and sustainable conservation outcomes through community-based outreach
Get PDFA priority in plant conservation science is the identification of species at risk of extinction, allowing for conservation efforts to be focused on those that are most critically endangered to prevent their loss. A 2023 revision of threatened plants in Victoria found that 1,557 species remain under direct threat of extinction, despite conservation work being undertaken across the state to safeguard both individual species and plant communities. Although conservation efforts are fundamental to the protection of our flora, the persistently high number of threatened species illustrates a need to reimagine the way in which we approach conservation. Central to this is a need to engage more people across a broader cross-section of the community so that they can contribute to initiatives that effectively reduce the number of species at risk.Raising Rarity is a community-based outreach programme run by Royal Botanic Gardens Victoria (RBGV). It is designed to actively engage distinct sectors of the Victorian community in local plant conservation. The programme acknowledges that although the expertise provided by RBGV in areas that include conservation horticulture, seed ecology, population genetics, outreach and education is critical to plant conservation efforts, the engagement and involvement of the broader community is fundamental to creating sustainable plant conservation solutions. Raising Rarity achieves this by working with volunteers, school groups, regional botanic gardens, local councils and members of the nursery industry to grow and display rare and threatened Victorian plants in accessible horticultural settings. The initiative aims to increase public knowledge, awareness and hands-on involvement in plant conservation.There are four key components to the Raising Rarity programme: (1) school outreach; (2)local government outreach; (3) botanic gardens outreach in an initiative called Care for the Rare; and (4) commercialisation of an RBGV rare plant collection. This article provides an overview of each of these components and outlines future objectives for the Raising Rarity programme
Water sensitive design features: their function and effectiveness over ten years in a botanic garden
Get PDFWater sensitive design (WSD) is a nature-based solution to urban stormwater problems which involves intercepting rainfall and stormwater from impervious surfaces using a range of devices. These devices rely on soils and plants to slow water flows, reduce water volumes and improve the quality of the water reaching our rivers, streams, lakes and oceans. Common devices used in Auckland, New Zealand are rain gardens and swales. Auckland Botanic Gardens (ABG) has applied a variety of these devices, often in ‘treatment trains’ and focusing on the use of native New Zealand plants, to solve an on-site environmental problem. ABG additionally supports research, advocates for the selection and effective maintenance of the native New Zealand plants, and educates the public about WSD. Recommendations for plant selection in Auckland for rain gardens and swales are made based on ten years of observations and trials at ABG
Conservation Collections at the National Botanic Garden of Nepal – The Franklinia Taxus Project
Get PDFThree species of Taxus occur in Nepal T. contorta, T. maireii and Taxus wallichiana,. All are under pressure from collection for medicinal use, habitat destruction and changing land use. In 2017 and 2018 fieldwork was carried out to collect seed, herbarium specimens, cuttings and information to improve protection of these species, funded by Fondation Franklinia. Collections were made for propagation, herbarium and molecular studies. Population level Information was also gathered to make national assessments for these species. This article traces the status of the living collections in the National Botanic Garden of Nepal (NBG) and the assessments made by the team comprising staffs of Department of Plant Resources (DPR) and Nepal Academy of Science and Technology (NAST) and Freelance botanist. Reference is made to work done prior to 2017 on the taxonomy and distribution of the species and which enabled efficient fieldwork thereafter. The establishment of a conservation collection at NBG provides a basis for research into yew species in Nepal and highlights the benefits of internationally collaborative projects to maintain conservation collections of threatened species in their country of origin
An investigation of large-leaved Gunnera L. (Gunneraceae) grown outside in Britain and Ireland
Get PDFA molecular investigation of large-leaved Gunnera growing outside in Britain and Ireland was conducted. Two low-copy nuclear CYCLOIDEA-like genes (CYC-like 1 and CYC-like 2) and two chloroplast DNA regions (matK and psbD-trnT) were sequenced for 271 samples of Gunnera. While it was confirmed that genuine G. tinctoria is growing both in cultivation and in the wild, the results support recently published morphological and historical findings that the species G. manicata appears no longer to be present in Britain and Ireland. Instead, the plant under this name is G. × cryptica, a hybrid between G. manicata and G. tinctoria. The implication of this discovery for legislation on invasive non-native species where G. manicata and G. tinctoria are listed is explored