| 1. |
- Veldman, Sarina, et al.
(författare)
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Trade in Zambian Edible Orchids-DNA Barcoding Reveals the Use of Unexpected Orchid Taxa for Chikanda
- 2018
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Ingår i: Genes. - : MDPI AG. - 2073-4425. ; 9:12
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Tidskriftsartikel (refereegranskat)abstract
- In Zambia, wild edible terrestrial orchids are used to produce a local delicacy called chikanda, which has become increasingly popular throughout the country. Commercialization puts orchid populations in Zambia and neighbouring countries at risk of overharvesting. Hitherto, no study has documented which orchid species are traded on local markets, as orchid tubers are difficult to identify morphologically. In this study, the core land-plant DNA barcoding markers rbcL and matK were used in combination with nrITS to determine which species were sold in Zambian markets. Eighty-two interviews were conducted to determine harvesting areas, as well as possible sustainability concerns. By using nrITS DNA barcoding, a total of 16 orchid species in six different genera could be identified. Both rbcL and matK proved suitable to identify the tubers up to the genus or family level. Disa robusta, Platycoryne crocea and Satyrium buchananii were identified most frequently and three previously undocumented species were encountered on the market. Few orchid species are currently listed on the global International Union for the Conservation of Nature (IUCN) Red List. Local orchid populations and endemic species could be at risk of overharvesting due to the intensive and indiscriminate harvesting of chikanda orchids, and we therefore encourage increased conservation assessment of terrestrial African orchids.
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| 2. |
- Veldman, Sarina, et al.
(författare)
-
Trade in Zambian edible terrestrial orchids - molecular identification reveals use of previously undocumented orchid taxa for chikanda.
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- In Zambia wild edible terrestrial orchids are used to produce a local Bemba delicacy called chikanda. Over the past decades chikanda has become increasingly popular throughout the country and commercialization puts orchid populations in Zambia, as well as neighboring countries, at risk of overharvesting. Up until now no study has documented which orchid species are traded on local markets, as orchid tubers are difficult to identify to genus or species level. In this study, the core land- plant DNA barcoding markers rbcL and matK were used in combination with nrITS to determine which species were sold on Zambian markets. A total of 82 interviews were held to determine harvesting areas, as well as possible sustainability concerns. By using nrITS DNA barcoding, a total of 16 orchid species in six different genera could be identified among the market samples, from which three were previously undocumented. Both rbcL and matK proved unsuitable for species-level identification, but can be used to identify the tubers up to genus- or family level. Satyrium buchananii, Platycoryne crocea and Disa robusta were encountered most frequently. International chikanda trade- hubs were identified in Zambia on the borders with the Democratic Republic of Congo (DRC) and Angola. People involved in chikanda trade indicate that both tuber quality, as well as quantity, were decreasing and were willing to consider alternatives to chikanda trade to secure their income. Currently hardly any orchid species are listed on the Zambian IUCN Red List. Local orchid populations and endemic species could be at risk of overharvesting due to the intensive and indiscriminate harvesting of chikanda orchids and we therefore urge for updating the IUCN Red List for terrestrial African orchids.
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