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An Ethnobotanical Analysis of Parasitic Plants (Parijibi) in the Nepal Himalaya Alexander Robert O’Neill1 and Santosh Kumar Rana2*

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An Ethnobotanical Analysis of Parasitic Plants (Parijibi) in the Nepal Himalaya Alexander Robert O’Neill1 and Santosh Kumar Rana2* O’Neill and Rana Journal of Ethnobiology and Ethnomedicine (2016) 12:14 DOI 10.1186/s13002-016-0086-y RESEARCH Open Access An ethnobotanical analysis of parasitic plants (Parijibi) in the Nepal Himalaya Alexander Robert O’Neill1 and Santosh Kumar Rana2* Abstract Background: Indigenous biocultural knowledge is a vital part of Nepalese environmental management strategies; however, much of it may soon be lost given Nepal’s rapidly changing socio-ecological climate. This is particularly true for knowledge surrounding parasitic and mycoheterotrophic plant species, which are well represented throughout the Central-Eastern Himalayas but lack a collated record. Our study addresses this disparity by analyzing parasitic and mycoheterotrophic plant species diversity in Nepal as well as the ethnobotanical knowledge that surrounds them. Methods: Botanical texts, online databases, and herbarium records were reviewed to create an authoritative compendium of parasitic and mycoheterotrophic plant species native or naturalized to the Nepal Central- Eastern Himalaya. Semi-structured interviews were then conducted with 141 informants to better understand the biocultural context of these species, emphasizing ethnobotanical uses, in 12 districts of Central-Eastern Nepal. Results: Nepal is a hotspot of botanical diversity, housing 15 families and 29 genera of plants that exhibit parasitic or mycoheterotrophic habit. Over 150 of the known 4500 parasitic plant species (~3 %) and 28 of the 160 mycoheterotrophic species (~18 %) are native or naturalized to Nepal; 13 of our surveyed parasitic species are endemic. Of all species documented, approximately 17 % of parasitic and 7 % of mycoheterotrophic plants have ethnobotanical uses as medicine (41 %), fodder (23 %), food (17 %), ritual objects (11 %), or material (8 %). Conclusions: Parasitic and mycoheterotrophic plant species exhibit high diversity in the Nepal Central-Eastern Himalaya and are the fodder for biocultural relationships that may help inform future environmental management projects in the region. Keywords: Nepal, Himalaya, Ethnobotany, Parasitic plants Background Indigenous and local groups and management officials. Indigenous biocultural knowledge (IBK) is pillar of en- Today, over 35 % of the 27.8 million-person population vironmental management strategies in Nepal, and has participates in Nepal’s vibrant community forestry pro- been adopted into policies that attempt to ensure that gram [7, 8], with over 70 % of the total population dir- indigenous communities live in and benefit from ‘nature’ ectly dependent on wild-forest crops for primary in a sustainable manner. For over two decades, IBK- livelihood, food, and medicine [9]. IBK-conscious polices conscious legislation such as the Forest Act [1], Forest have bolstered existing socio-ecological relationships in Regulation Act [2], and National Biodiversity Strategy Nepal, conserved natural resources, and preserved the [3] as well as international contracts with the Conven- country’s cultural heritage. tion on International Trade in Endangered Species of However, in spite of recent successes, Nepal’s current Wild Flora and Fauna [4], Ramsar Convention [5], and policies face impending challenges from ‘modernizing’ United Nations Convention on Biological Diversity [6] forces and accelerated rates of environmental change have cultivated cooperative relationships between [10]. For instance, population growth, human migration, and agricultural development have had pernicious rami- * Correspondence: [email protected] 2 fications in many sacred and protected zones, including Department of Botany, Systematics and Biodiversity, Central Department of – Botany, Tribhuvan University, Kirtipur, Kathmandu 44618, Nepal Chitwan National Park [11 13]. At higher altitudes, Full list of author information is available at the end of the article © 2016 O’Neill and Rana. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. O’Neill and Rana Journal of Ethnobiology and Ethnomedicine (2016) 12:14 Page 2 of 15 overharvest of medicinal plants, driven primarily by emphasizing TBK and ethnobotanical uses, to preserve market demands in India and China [14], has disrupted the biocultural heritage of these species in the Central- historical ecosystem dynamics and transformed trad- Eastern Himalayas. Based on fieldwork conducted from itional livelihoods [15, 16]. Beyond these acute sources September 2013 through May 2014 and an exhaustive of environmental degradation, trends in migrant labor literature review, we developed a critical interpretation and education have further stunted rates of IBK trans- of PMP use and management. mission, reducing the practicality of existing policies [17]. Therefore, future conservation strategies must, in Methods part, preserve IBK that may provide human and eco- Study area logical communities with greater adaptive capacity to Nepal occupies a 147,181-km2 zone in the Central- cope with current and future environmental change. Eastern Himalayan range (latitude: 26°22′ to 30°27′ N; IBK in the form of Traditional Botanical Knowledge longitude: 80°40′ to 88°12′ E) between China and India. (TBK) may provide the most viable option for ameliorat- It is administratively divided into five development re- ing current rates of biocultural attrition in Nepal. TBK gions, 14 zones, 75 districts, 191 municipalities, and incorporates perceptions of natural environments, in- 3276 village development committees (VDC). At the cluding elements such as soil, climate, vegetation type, level of VDC, most communities are further subdivided stages of ecological succession, and land use [15], and along ethnic or caste lines, stratifying IBK/TBK well has been celebrated for its ability to support local econ- beyond the level of administrative boundaries. omies through alternative livelihoods [16]. Nepal ranks Ecologically, the country is classified into three vegeta- as the 9th most floristically diverse country in Asia. tive and seven physiogeographic zones based on altitud- Despite occupying 0.1 % of earth’s land cover, it houses inal variations from the lowlands (59 m) to the high over 8000 plant species of which one quarter are be- Himalayas (8848 m). However for the purposes of policy, lieved endemic [10, 18]. Approximately 50 % of these the Master Forestry Plan for Nepal considers only five plants are considered ‘useful’ [19] or ‘ethnobotanical’ in physiogeographic zones based on altitude: Terai (60– nature [20] and 25–50 % are expected to have medicinal 330 m), Siwalks (120–2000 m), Middle Mountain properties [19, 21, 22]. Agroforestry and sustainable har- (2000–3000 m), High Mountains (3000–4000 m) and vesting practices of medicinal or useful plant species, High Himal (above 4000 m). Our fieldwork was primar- including many culinary species such as cardamom, may ily conducted in the Terai and Middle Mountains of provide the economic incentive [23, 24] necessary to Central and Eastern Nepal. Our review spans the entire ensure the future health of Nepalese ecosystems [25]. country (Fig. 1). Although there has been a recent surge in TBK re- search, certain species remain significantly understudied Ethnobotanical survey in Nepal. In particular, the guild of plants known as par- Before initiating our ethnobotanical investigation, we asites and mycoheterotrophs, collectively denoted by the collected all available data on the status of PMP in term parijibi in Nepali language, lacks a literature rec- Nepal. First, we reviewed authoritative botanical texts ord. Parasites and mycoheterotrophs (PMP) are unique [25–30] to glean details on plant distributions, altitud- among plants because they depend upon a host plant for inal ranges, parasitic habit, hosts, flowering times, and some or all of their nutrients during a period of their fruiting times. We then cross-referenced these data lifecycle. Globally, there are 20 parasitic plant families against online botanical databases [31–33], and com- and eight mycoheterotrophic plant families, many of pared these data against herbaria records at Nepal’s which do not photosynthesize, and, therefore, have atyp- National Herbarium and Plant Laboratories (KATH) [34] ical life histories. Moreover, all PMPs have extreme habi- in Godawari, Lalitpur, Tribhuvan National University’s tat specifications that are inherently bound to forest Central Department of Botany’s Herbarium (TUCH) [35] community dynamics as well as their host-species located in Kirtipur, Kathmandu, and Tribhuvan University ranges. Together, these requirements have had marked Post-Graduate Campus’ botanical collections in Biratna- affects on PMP population densities, abundances, and gar, Morang (TUCH; 34). Once this process was complete, potential ranges. PMP are well represented in Nepal; we generated range maps and species profiles for each however, little is known about their exact diversity or PMP using ArcGIS version 9.3 to guide our ethnobotan- the biocultural knowledge that surrounds them. ical survey [36] (Additional
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