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Orchids: 2017 Global Ex Situ Collections Assessment

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Orchids: 2017 Global Ex Situ Collections Assessment Orchids: 2017 Global Ex situ Collections Assessment Botanic gardens collectively maintain one-third of Earth's plant diversity. Through their conservation, education, horticulture, and research activities, botanic gardens inspire millions of people each year about the importance of plants. Ophrys apifera (Bernard DuPon) Angraecum conchoglossum With one in five species facing extinction due to threats such (Scott Zona) as habitat loss, climate change, and invasive species, botanic garden ex situ collections serve a central purpose in preventing the loss of species and essential genetic diversity. To support the Global Strategy for Plant Conservation, botanic gardens create integrated conservation programs that utilize diverse partners and innovative techniques. As genetically diverse collections are developed, our collective global safety net against plant extinction is strengthened. Country-level distribution of orchids around the world (map data courtesy of Michael Harrington via ArcGIS) Left to right: Renanthera monachica (Dalton Holland Baptista ), Platanthera ciliaris (Wikimedia Commons Jhapeman) , Anacamptis boryi (Hans Stieglitz) and Paphiopedilum exul (Wikimedia Commons Orchi ). Orchids The diversity, stunning flowers, seductiveness, size, and ability to hybridize are all traits which make orchids extremely valuable Orchids (Orchidaceae) make up one of the largest plant families to collectors, florists, and horticulturists around the world. on Earth, comprising over 25,000 species and around 8% of all Over-collection of wild plants is a major cause of species flowering plants (Koopowitz, 2001). Orchids naturally occur on decline in the wild. Orchids are also very sensitive to nearly all continents and ecosystems on Earth, with high environmental changes, and increasing habitat loss and diversity found in tropical and subtropical regions. Scientists climate change are leading contributors to the disappearance and horticulturists have been fascinated for centuries by the of orchids worldwide. As a result, exchange of all orchids complex flowers and life cycles, pollinator relationships, and between countries is regulated by the Convention on uses of orchids including foods, flavorings, medicines, International Trade of Endangered Species (CITES). ornaments, and perfumes (Popova et al ., 2016). Gardens Support Orchid Conservation Due to their complicated biology ex situ conservation of orchids can be technically challenging. Research at botanic Remaining orchid habitat (and pollinators) are declining gardens and other conservation partners is producing rapidly enough that ex situ conservation must serve as a protocols for long-term storage of seed, pollen, and safety net to ensure long-term species survival. One orchid associated fungi, as well as seed germination and in vitro species, Oeceoclades seychellarum , has been assessed by propagation for a growing number of orchid species. This is the IUCN as Extinct due to habitat degradation caused by revealing new opportunities for orchid ex situ conservation, human settlement and invasive plants. Although only 3% (890 and a variety of ex situ approaches are being utilized of 27,800) of orchids have been assessed by the IUCN, 59% including the maintenance of living plants, stored seeds, (529 taxa) are considered threatened and need ex situ cryopreserved tissues, and also the growth and study of protection to prevent extinction. fungal partners (IUCN Orchid Specialist Group, 2017). Orchid threat assessment status Extinct 1 Assessed by the IUCN Critically Endangered 163 as threatene d 2 Assessed by the IUCN 26,910 as not threatene d 2 Endangered 249 Not yet assessed by 1 Vulnerable 116 529 the IUC N 1Angiosperm Phylogeny Website (http://www.mobot.org/MOBOT/research/APweb/) Total orchid taxa per 361 2 IUCN Red List of Threatened Species IUCN Red List Threat Rank 1 Cyrtopodium punctatum (http://www.iucnredlist.org/) 1IUCN Red List of Threatened Species (Valerie Pence) (http://www.iucnredlist.org/) Orchids in Collections Ex situ representation of 790 orchid genera Using a list of 30,477 orchid species from the World Checklist of Orchids (Govaerts, et al ., 2016) and BGCI’s 100% taxa in genus PlantSearch database, 436 plant and 33 seed ex situ 68 reported ex situ sites were identified that currently report any orchid 124 species. Of the nearly 800 genera included in the 273 50-99% taxa in genus checklist, 517 (65%) orchid genera were reported reported ex situ among these collections. A majority of the most 1-49% taxa in genus species-diverse orchid collections are found in the reported ex situ United States and Europe, outside tropical regions 325 where natural orchid diversity is highest. This reflects 0% taxa in genus possible gaps in regional collections capacity and reported ex situ PlantSearch data. Institution Country Number of orchid species Hexalectris spicata (Wikimedia Commons Orchi) Atlanta Botanical Garden United States 1600+ Royal Botanic Gardens, Kew United Kingdom 1300+ Smithsonian Gardens - Orchid Collection United States 1050+ Marie Selby Botanical Gardens United States 1000+ Gothenburg Botanical Garden Sweden 900+ Jardin Botanique de Montréal Canada 890+ Botanischer Garten der Philipps-Universität Marburg Germany 880+ Hortus botanicus Leiden Netherlands 870+ Glasgow Botanic Gardens United Kingdom 750+ Huntington Botanical Gardens United States 740+ Main Botanical Garden, Russian Academy of Sciences Russia 610+ United States Botanic Garden United States 600+ Wheeler Orchid Collection and Species Bank United States 590+ Denver Botanic Gardens United States 540+ Singapore Botanic Gardens Singapore 500+ Botanic Garden Meise Belgium 470+ Longwood Gardens United States 470+ Jardin Botanique de la Ville de Lyon France 450+ San Diego Zoo Botanical Gardens United States 440+ Jardin des Plantes de Paris et Arboretum de Chevreloup France 410+ University of California Botanical Garden at Berkeley United States 390+ Top 20 most species-diverse orchid collections recorded in PlantSearch *based on Govaerts, et al . (2016) orchid checklist and BGCI’s PlantSearch database Top priorities for ex situ conservation action include focusing efforts on globally threatened Phalaenopsis violacea species. A majority (64%) of the 604 globally threatened orchid species assessed by the (Wikimedia Commons Orchi) IUCN and NatureServe have not been reported by ex situ collections (BGCI, 2017). Of the threatened orchids maintained in collections, one fifth (122 species) are reported by five or fewer collections. Ensuring that every threatened species is protected in ex situ collections is a first step to creating a global safety net against extinction.Species in one or a few collections should be acquired, duplicated and backed up at other sites. Paphiopedilum insigne 62 ex situ Collections Ansellia africana 56 ex situ Collections s e Paphiopedilum hirsutissimum 44 ex situ Collections t 80 i s Neobenthamia gracilis 43 ex situ Collections u t i Pleione formosana 43 ex situ Collections s 60 x e f o r 40 376 (64%) not reported ex situ e b 53 (9%) reported by only one collection m u 20 N 0 Threatened orchid taxa Ex situ collection status of 604 globally threatened orchids *Data sources: IUCN Red List, NatureServe, and BGCI’s PlantSearch database As recently discovered with Brighamia insignis collections, however, the non-wild origin accessions can be extremely valuable for preserving genetic diversity (Fant et al ., 2016). It is possible that further investigation of accessions history and provenance could reveal known origins. When locality is known, it is also feasible to retro-classify spatial data for Angraecum eburneum accessions of wild origin. Adequate data collection during (Scott Zona) wild-collecting efforts, and curation and preservation of accession data for existing ex situ collections make ex situ collections readily available and valuable for conservation and research applications. Orchid Accessions Survey “ Collection and curation of provenance data make ex situ In 2017, a subset of 54 globally threatened orchid species collections readily available and valuable for conservation was used for a survey of accessions data maintained at and research. ” gardens. Out of 202 institutions in 70 countries reporting the target species to BGCI’s PlantSearch database, 37 responded to the survey and sent lists of accessions. Over Provenances reported for twenty fields of data were requested for each accession, a subset of 54 threatened focusing on provenance (origin) of the target species. orchid species 24% Overall, accession number, source, provenance type (wild, cultivated, or unknown origin), and number of individuals Cultivated were reported for more than 80% of accession records 57% submitted. Latitude and longitude, on the other hand, were Wild 19% reported for less than 1% of records. The majority (57%) of accession provenances reported for the target species were of cultivated (garden or horticultural) origin (see right). Unknown Notably, several orchid accessions reported by gardens were acquired as a plant rescue or border confiscation. Roles of Botanic Garden Orchid Collections Most important Least important Botanic Gardens Conservation 40 International (BGCI) has defined 35 botanic gardens as “ institutions 30 holding documented collections of living plants for the purposes s 25 n of scientific research, conservation, display, and education. ” In e 20 d r 2017, the Gothenburg Botanical Garden sought to characterize a 15 the most important factors for acquisition and prioritization
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