Exploration of Wild Edible Plants Used as Food by Gaddis-A Tribal Community of the Western Himalaya

A survey of wild edible plants of Gaddi tribes of Himachal Pradesh was carried out in Chamba and Kangra districts of Himachal Pradesh located in Western Himalayas. The inhabitants subsisted primarily on pastoralism and agriculture and have traditional knowledge on wild edible plants. A total of 49 edible plants belonging to 24 families were recorded in the study area. These were commonly used as vegetables, fruits, spices, and chutney. Nearly half of the species belong to Polygonaceae and Rosaceae families. Herbs, shrubs, climbers, and trees form the habit of these plants. The highest proportion of edible species were herbs (29) followed by trees (10), shrubs (8), climber (1), and Morchella esculenta (fungi) (1).


Introduction
India being developing country and land of villages, elevated rates of poverty persist among rural communities, inspite of green revolution. e high economic growth has failed to improve food security in the mountainous regions of the Himalayas [1]. Fortunately, the Himalayas are known for rich biodiversity, especially for wild edible plants, which play an important role in meeting food demands. e rural inhabitants who mainly comprise of herders, shepherds, or other marginalized population use wild plants frequently for their livelihood [2]. e need is to understand the biodiversity for resource management of the Himalaya. is requires documentation of resources through ethnobotanical studies and for the conservation and utilization of resources. Moreover, the transmission of traditional knowledge from older to younger generations no longer exists; [3] thus, it is important to document the resources, especially of wild edible plants.
e Gaddis, the nomadic sheep and goat herders, are one of the most important migratory tribes of the Himalaya [4]. In Himachal Pradesh, Gaddis belongs to the Kangra and Chamba districts who move their livestock from one grazing ground to another in a seasonal cycle, to plains in winter and hilltops in summer. e livelihood of Gaddis depends on animal products and natural resources, such as plants and forests [3,5]. Traditional knowledge of plants and their properties has always been transmitted from generation to generation through the natural course of everyday life. Transmission of traditional knowledge between the older and younger generation is no longer exists that's why the continuation of traditional knowledge is endangered [6]. Wild plants are richer in minerals compared to cultivated ones, and these plants may satisfy the daily human need for elementary nutrition sources, particularly those of Vitamin C and A, and for some minerals according to WHO regulation [7]. Wild edible plants provide vegetables, fruits, staple food, and spices for indigenous people and are the main source of food. ese plants play an important role in the development of new crops through domestication, giving rise to cultivated food plants and strengthening local food security [8][9][10][11]. Consumption of wild plants has been a way of life for many rural populations throughout the world. Use of wild edible plants is an ancient tradition that has been increasingly neglected [12]. Due to socioeconomic changes, indigenous knowledge has been gradually destroyed by globalization and modern lifestyles [13,14]. At the same time, the loss of indigenous knowledge has been discovered to be one of the major threats to the sustainability of biological diversity [15]. e aim of present study is to document wild edible plants used by Gaddis of Chamba and Kangra regions located in Himachal Pradesh, a mountainous state in the Himalaya. In addition, the present study is initiated from the remote area, with an aim to document the knowledge on the utilization of wild edible plants.

Materials and Methods
e study area comprises of Chamba and Kangra districts located in the state of Himachal Pradesh. Extensive field surveys were made during 2017 and 2018 in Bharmour of District Chamba and Dharamshala (Khanyara) of district Kangra ( Figure 1). Bharmour region lies between 1500 m to 3700 m amsl and extends 32°11′35″ to 32°41′54″N latitude 76°31′35″ to 76°53′71″E longitude covering total geographical area of about 1,818 km 2 . e mean annual rainfall of Bharmour is 1500 mm, and the mean annual temperature lies between 3°C to 30°C. Dharamshala lies in between 800 m to 1500 m amsl and extends 31°21′2″ to 32°59′25″N latitude and 75˚47′55″ to 77°45′72″E longitude. Dharamshala falls under wet temperate zone where the annual mean In order to study wild edible plants used by the Gaddis, a questionnaire was prepared and used as a tool for the collection of information by personal interview. e questionnaire was divided into two parts: demographic and ethnobotanical data. e first part deals with the personal information of Gaddis like name, age, sex, occupation, etc., while the second part contained questions related to wild plant resource being utilized. Information on wild edible plants was collected from the Bharmour region of District Chamba from August 2017 to October 2017 and June 2018 to July 2018 when the Gaddis were on the way of their migration. Similarly, from Dharamshala, information was collected from March 2018 to April 2018 when the Gaddis were migrating from Khanyara. Key informants (Gaddis) were randomly selected as they were on their route of migration. Bharmour and Dharamshala were selected as study sites because the Gaddis reside in Bharmour in summer season and winters in Dharamshala. e 60 interviewed informants were made up of 48 male and 12 females, with age group between 20 and 65 years. e utilization of plant resources was identified through both the questionnaire and participatory techniques. Plant species are collected which are used by Gaddis as food. Collected plant species were dried, pressed, and mounted on the Herbarium Sheets for identification. ese collected plant species were identified from the BSI (Botanical Survey of India), Dehradun. e collected plant material were given voucher number from SUBMS/BOT-501 to SUBMS/BOT-519 and SUBMS/ BOT-2051 to SUBMS/BOT-2080 and submitted the herbarium sheets in the Herbarium of Shoolini University, Solan.

Results and Discussion
A total of 49 species were reported which were commonly consumed as vegetables, fruits, spices, chutney, etc. Among theses, 20 plants of 12 families were collected from the Bharmour region between August 2017 and October 2017 and are presented in Table 1. It is evident from Table 1 that nearly half of these plants were of Polygonaceae and Rosaceae families. It was also observed that out of 20 plants used by Gaddis from Bharmour region, fruits of 9 plants were consumed. Pickle and chutney form important food part in all the meals and is taken from Oxalis corniculata and Oxyria digyna. It is evident from Table 2 that 16 plants of 12 families were collected from the Bharmour region between June-July 2018. Among these Viburnum contifolium, Rubus niveus, and Ficus palmata were used as fruit, while all others as vegetable. Mostly aerial parts like leaves and flowers were used as vegetables. A total of 13 plants of 11 families were collected from Khanyara, Dharamshala, Kangra district  Table 3). Overall number of species used and various plant parts consumed by the Gaddis are 15 species (aerial parts, fruits), 12 species (leaves), 2 species (stem, flower), and 1 species (seed, whole body, and nuts) as shown in Figure 2. Herbs made up the highest proportion of the edible species (29) followed by trees (10), shrubs (8), climber (1), and fungus (1). Images of some collected wild edible plants is shown in Figure 3  ere are over 20,000 species of wild edible plants in the world [16] and 1532 edible wild food species reported in India [17], of which over 675 species grow in the Indian Himalayan region [18]. A total of 58 wild edible plant species were used by Gujjar and Bakerwal tribes of District Rajouri (J&K) [19]. 50 wild edible plants belonged to 33 families from the Kishtwar high-altitude national park in Northwest Himalaya [20]. ese plants were consumed as fruit, vegetables, and flavouring agent [21]. From the Alaknanda Valley of Garhwal Himalaya, India, 55 plant species belonging to 35 families were recorded. ese plant species were consumed raw and prepared in to vegetables [22]. Similarly from Chamba district of Himachal Pradesh, 50 plant species of which 23 are herbs, 13 were trees, 2 were climbers, and 12 shrubs were used as ethno medicinal [4]. 50 species were used as wild edible plants which are in shepherds' route from high hills to low hills in the Kinnaur district of Himachal Pradesh [2].
Morchella esculenta (fungi), reported by Radha and coworkers (2018), were found to be absent in our studies except in Bharmour region of Chamba district indicating their extinction from the region. e present studies are in line with earlier studies as stated above. e Gaddis are poor people and are dependent on edible plants growing in forest area or common lands. e nutritional requirements, especially vitamins, proteins, etc., are met through wild edible plants. Sometimes, the tribes collect these fruits in bulk and sell them in market which forms an important source of cash earnings. ese plants generally belong to Rosaceae, Moraceae, and Fabaceae families. However, due to over exploitation, overgrazing,

Conclusion
e present study showed that different wild plants were used as food by Gaddi community of western Himalaya in order to sustain their life. Plant parts used commonly were leaves, fruits, and stem. ese edible plants provide food and nutrition such as essential amino acids, vitamins, and minerals for this community to stay healthy. Unfortunately, the traditional knowledge on the use of wild edible plants is vanishing due to the modernization, and there is a need to document the traditional knowledge associated with a particular tribe.

Conflicts of Interest
e authors declare that they have no conflicts of interest.