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Ethnobotanical study on plants used for traditional beekeeping by Dulong people in Yunnan, China
Journal of Ethnobiology and Ethnomedicine volume 16, Article number: 61 (2020)
The Dulong (Drung) people have used plant materials in traditional beekeeping for many decades. However, there are few studies on the plants used in traditional beekeeping. Furthermore, traditional ecological knowledge (TEK) associated with beekeeping is still poorly understood. TEK and plants associated with beekeeping play an important role in the conservation of native bees and the development of beekeeping. It is therefore very urgent to investigate, record, and study the plants and TEK of Dulong beekeeping.
Fieldwork was conducted in the Dulong community of Gongshan County, Yunnan Province, China. Six Dulong villages were investigated. Ethnobotanical methods such as free listing, semi-structured interviews, participatory observation, and key informant interviews were used to collect data. A total of 42 Dulong respondents provided information about plants used in traditional beekeeping. TEK related to traditional beekeeping plants was documented. Citation frequency, abundance, and preference ranking of log beehive plant species were used to identify plant resources that are “easier to obtain” and “more preferred.”
There are two general methods of traditional Dulong beekeeping: living tree beekeeping and log beehive beekeeping. The investigation revealed that 38 species (in 19 families), including 30 tree species, 5 bamboo species, 2 herbaceous species, and 1 liana species, are used in traditional Dulong beekeeping. Different plant parts are used for different purposes. Twenty-seven tree species are used to make log beehives. Species from the family Pinaceae and Fagaceae are the most frequently represented. Seven of the most commonly reported species used to build log beehives were scored by ten beekeepers. Based on this scoring, the beekeepers’ most preferred species for making log beehives are Alnus nepalensis, Pinus yunnanensis, and Juglans regia.
The Dulong people have used various plants for traditional beekeeping and have accumulated rich TEK associated with apiculture. Future research will include a nutritive components analysis of honey from traditional Dulong beekeeping and an ethnobotanical investigation of melliferous species used in traditional Dulong apicultural systems. The application of plants and TEK associated with beekeeping is important for improving livelihoods in local communities, conserving biocultural diversity, and protecting the eco-environment of the Dulongjiang area.
Traditional beekeeping is important for agriculture, rural employment, human nutrition, and economic development. It has become an example of successful livelihood improvement in remote area of developing countries [1,2,3]. Traditional beekeeping has many advantages in that it carries low risk, requires little investment, generates active income, and saves labor [4, 5]. At the household level, beekeeping can provide nutritious products, such as honey, beeswax, royal jelly, and propolis. Selling these bee products can help poor farmers transition out of poverty [6, 7]. In crop fields, bees are important pollinators that improve yields and promote sustainable development [8, 9]. At the ecosystem level, beekeeping plays an indispensable role in protecting biodiversity and maintaining ecological balance [10,11,12].
Traditional beekeeping has been practicing as a conventional occupation in China’s vast rural areas for several thousand years . China has high honeybee diversity, a long history of beekeeping, and many managed honeybee colonies . For a long time, China has been among the world’s leaders in number of bee colonies, annual honey production, and export of bee products . Traditional beekeeping has made a significant contribution to Chinese beekeeping . Collecting honey in tree holes can be traced back 2000 years. In the book “Golden Rules of Business Success” (Zhi Fu Qi Shu in Chinese) written by Fan Li during the Spring and Autumn Period (ca.770 to 476 BC), there are sections describing traditional beekeeping with a wooden box placed in a courtyard . Traditionally, man-made devices are mainly used for breeding Chinese bees (Apis cerana cerana) and most man-made devices belong to ethnic minorities in the mountainous areas of Southwest China. Many studies have reported that traditional beekeeping can protect native bees [17,18,19,20,21].
Dulong (or Drung), one of China’s less populous ethnic groups, are concentrated in the Dulongjiang area, living mainly near water and in forests . As a result of their long history of interacting with the living environment and of the unique topography, rainy weather, closed traffic conditions, and abundant natural resources of their lands, the Dulong people have developed many unique livelihood strategies, such as collecting wild edible and medicinal plants, fishing, hunting, beekeeping, and slash-and-burn agriculture . In traditional Dulong beekeeping practice, different plants have been used by the beekeepers in different ways, especially in the construction of log beehives and shelters for A. cerana. However, it is uncertain what kinds of log beehive materials the Dulong prefer and how they sustainably manage these plant resources. Research in other regions has shown that traditional ecological knowledge (TEK) and plants associated with beekeeping are important for sustainable development of beekeeping and for ecosystem stability. Strengthening the management of these plants can contribute to biodiversity conservation and ecosystem services [17, 21, 24].
Traditional beekeeping has become the main income source for Dulong people. Unfortunately, little has been reported about the plants used in traditional Dulong beekeeping or about the related TEK. With the development of tourism in the Dulongjiang area, TEK of beekeeping will inevitably be affected. Due to China’s rapid economic development, traditional modes of production and the associated traditional culture has been changing dramatically in the Dulong community. It is very urgent to investigate, record, and study the plants, processes, and traditional ecological knowledge used in Dulong traditional beekeeping. This study aimed to (1) document the process of traditional Dulong beekeeping and associated TEK, (2) report plants used in traditional Dulong beekeeping, (3) evaluate plant species that are “easier to obtain” and “more preferred” for log beehive materials, and (4) analyze the benefits and challenges of traditional Dulong beekeeping.
Dulongjiang Township, the only settlement of the Dulong (Drung) people in China, is located in the west of Gongshan Dulong and Nu Autonomous County, Nujiang Lisu Autonomous Prefecture, Yunnan Province, China (Fig. 1). Dulongjiang Township (27° 40′ ~ 28° 50′ N, 97° 45′ ~ 98° 30′ E) borders Bingzhongluo and Cikai townships to the east, Chayu County of Tibet Autonomous Region to the north, and Kachin State of the Federation of Myanmar to the west and south . Dulongjiang Township has a typical alpine-gorge landscape with a large altitude gradient ranging from 222 to 3400 meters above sea level. The average rainfall is 3672.8 mm per year. Dulongjiang Township is one of the core areas of the Gaoligongshan National Nature Reserve and the World Natural Heritage of Three Rivers Parallel. It is one of the highest biodiversity areas of China, with 275 species in 41 families of ferns and 2003 species in 158 families of seed plants [25,26,27,28].
Dulong is one of the 55 ethnic groups in China and is the smallest ethnic group by population in Yunnan Province. The 6930 Dulong people living in Dulongjiang Township account for 99% of the total population. Most people speak the Dulong language. Only young people can speak Mandarin Chinese. These indigenous people have minimal income, most of which is generated from plantations of spices and herbs [29,30,31].
Field survey and data collection
During August and November 2019, we conducted ethnobotanical surveys in Dulongjiang Township covering villages of Xiongdang, Dizhengdang, Longyuan, Xianjiudang, Kongdang, Bapo, and Miaku (Fig. 1, Fig. 2).
Ethnobotanical methods including free listing, semi-structured interviews, participatory investigation, and key informant interviews were used in the field investigations. A total of 42 informants were selected using snowball sampling. In the first stage, participants were invited to freely list all plants used in beekeeping. Then, semi-structured interviews were conducted. Interviews (Table 1) were conducted in Mandarin Chinese and translated into Dulong language with the assistance of our Dulong guide. Informed consent was obtained verbally from all participants prior to the study. After obtaining permission, photos were taken of the main steps in the beekeeping process.
In the second stage of field surveys, researchers accompanied by local villagers conducted a field walk to collect plant species used in beekeeping and to observe the beehives. Some plant species used to make log beehives were not found during the field survey. Pictures from the Plant Photo Bank of China (http://ppbc.iplant.cn/) of these plants were shown to informants to confirm species identification and other relevant information. The nomenclature of all vascular plants reported in our study follows the Flora of China . Prof. Chunlin Long identified the plant species, and the voucher specimens were deposited at the herbarium in College of Life and Environmental Sciences, Minzu University of China, in Beijing.
Demographic characteristics of the respondents
A total of 42 Dulong respondents (7 from Bapo, 8 from Kongdang, 8 from Xianjiudang, 6 from Longyuan, 7 from Maku, and 6 from Dizhengdang) were selected for interviews. The study found that activities related to traditional beekeeping are generally performed by men; thirty-eight of the respondents were male, and only four were female. The respondents’ ages ranged from 25 to 73 years old, and the average age was 41. Most beekeepers were farmers. The overall level of education was low. Young people had higher levels of education than the elders (Table 2).
To identify plant resources used for log beehive materials that are “easier to obtain” and “more popular,” we used questions 1, 4, and 5 in Table 1 to determine citation frequency (how many times the informants mentioned each plant), abundance, and preference ranking (PR) of log beehive plants . Frequency of citation was the key factor in prioritizing log beehive materials. Abundance of log beehive species can represent the resource and accessibility of plants, and frequency of citation was calculated based on the work of Zhang et al. . Preference ranking was used with ten selected informants—regarded as professional beekeepers in their village—to rank the most popular log beehive plant species in the study area. All informants were asked to score the seven plant species with the highest citation frequency, with a score of 5 meaning highly preferred and a score of 1 meaning highly undesirable [35, 36].
Results and discussions
The process of traditional Dulong beekeeping
There are two general forms of traditional Dulong beekeeping in the study area: living tree beekeeping and log beehive beekeeping (Fig. 3a, b). Living tree beekeeping is relatively rare because of the complexity of the process, which requires more time and effort to construct the beehives. Generally, it is only done in the trunks of Pinus yunnanensis and Alnus nepalensis. The Dulong people use a tree with holes or chisel a rectangular hole about 1.5 m above the ground, cover the nest door, and leave a few small holes next to it. They then burn the inside of beehives with fire, and finally coat the inside with mud. The advantage of living tree beekeeping is that it stimulates the natural environment and avoids destruction by wild animals such as black bear (Ursus thibetanus).
The process of log beehive beekeeping generally includes construction, applying various pre-treatments, and installation (Fig. 4b–d). Log beehives are mostly made of round wood 70 to 100 cm in length and 30 to 50 cm in diameter. They are made from dead trunks or wood salvaged from the river.
There are two ways to make nest doors to log beehives: hollowed from the side or hollowed on both ends. If the log is hollowed from the side (Fig. 4b), the hole is covered with a 20 cm × 10 cm rectangular wooden board. If the log is hollowed from both ends (Fig. 4c), one end is sealed with a circular wooden board whose diameter is close to that of the hole. There are various ways of constructing the nest door on the other end of the log to allow bees to move in and out of the hive. For example, holes can be opened up on the nest door, or a small gap can be left between the nest door and the log, which allows 4–5 bees at a time to pass through. After the preparation, various pre-treatments, such as drying and removing worms from the log beehive, are required. Some beekeepers bake the inside of log beehives with fire. Others use chopsticks to form a cross shape inside the beehive, making it easier to cut honey.
Most beekeepers install their hives on the leeward side of a structure. Log beehives are placed behind houses or on cliffs and cannot be reached from the ground. To prevent the log beehives from getting wet, the Dulong build a shelter made of bamboo and rattan, cover the hive with leaves of Caryota obtusa and Magnolia rostrata, or put a wooden board on top of the log beehives (Fig. 4a). With modernization, more artificial materials, such as rope and iron plates, are being used in log beehive construction. However, these modern materials are not as effective as the traditional materials. To prevent damage from wild animals and natural disasters, beekeepers use natural barriers to shield the hives. They also concentrate beehives on cliffs, which forms a beautiful landscape (Fig. 5).
Plant species used in traditional Dulong beekeeping
Thirty-eight species—including 30 tree species—belonging to 19 plant families were documented through interviews of 42 informants from six villages (Fig. 6) (Table 3). Different plant parts were reported by beekeepers for constructing shelters and log beehives, for driving swarms away during honey collection, for affixing hives to their bases, and for attracting swarms. All tree species, except Magnolia officinalis, Caryota obtusa, and Luculia yunnanensis, are used for making log beehives. Leaves of Magnolia officinalis and Caryota obtusa are used for shelter construction, and flowers of Luculia yunnanensis are used to attract swarms. All bamboo species are used to make shelters, while Chimonobambusa armata, Fargesia pleniculmis, and Fargesia praecipua are also used for affixing hives. One herb (Urtica laetevirens) is processed into twine for affixing while the other (Imperata cylindrica) is used for making shelters and driving swarms away. Dulong people burn the whole plant of I. cylindrica when collecting honey to drive swarms away. Only one liana (Holboellia angustifolia) is used in traditional beekeeping, for affixing.
A total of 27 tree species are used for making log beehives. In terms of plant families, Pinaceae and Fagaceae have the greatest representation of species with 6 and 5 species, respectively, while other families are only represented by one or two species (Fig. 7). In our survey, seven most cited plants (mentioned by more than 75% of respondents) were Pinus yunnanensis, Cinnamomum camphora, Juglans regia, Alnus nepalensis, Quercus lamellosa, Toxicodendron vernicifluum, and Toona sinensis. The most abundant plants were Pinus yunnanensis, Quercus lamellosa, Alnus nepalensis, and Juglans regia.
Six plants used in beekeeping are included in the national list of protected species. For example, the trunks of Taxus wallichiana, Taiwania cryptomerioide, Picea brachytyla var. complanata, and Cinnamomum camphora are used to make log beehive, and the leaves of Houpoea rostrata and Caryota obtusa are used to make shelters. The Dulong do not cut down these endangered plants. The materials used for making log beehives are generally sourced from dead trunks or wood salvaged from the river, which are easy to process. This also avoids cutting living trees.
Evaluation of tree species used for making log beehives
The survey results show that among the most commonly used materials, the beekeepers’ favorite materials are Alnus nepalensis, Pinus yunnanensis, Juglans regia, Cinnamomum camphora, Toxicodendron vernicifluum, Toona sinensis, and Cyclobalanopsis glauca. During the investigation, we found that beekeepers generally choose log beehive materials based on four criteria: abundance, ease of processing, durability, and smell. Different tree species have pros and cons in various aspects. For example, Pinus yunnanensis, Alnus nepalensis, Quercus lamellosa, and Juglans regia are very common and easy to obtain. In terms of durability, Pinus yunnanensis, Quercus glauca, and Cinnamomum camphora are the best, because they are excellent materials for buildings. However, materials that are more durable are also more challenging to process. Alnus nepalensis, Juglans regia, and Toona sinensis are easier to process. In terms of smell, Toxicodendron vernicifluum, Toona sinensis, and Cinnamomum camphora have strong odors while the odor of Pinus yunnanensis is faint. Some beekeepers prefer constructing bee barrels from plants with strong odors because the odor discourages pests and disease, while others believe that strong odors are bad because bees avoid or dislike the smell. Based on abundance, ease of processing, durability, and smell, the tree species most highly valued by beekeepers for log beehives are Alnus nepalensis, Pinus yunnanensis, and Juglans regia (Table 4).
Benefits and challenges of traditional Dulong beekeeping
Dulong people use traditional beekeeping methods to keep native bees (A. cerana). The scale of traditional Dulong beekeeping in Dulongjiang area continues to grow. Except for Dizhengdang Village, the number of beehives in the other five villages has been increasing in the past three years (Fig. 8). The unique geography, weather conditions, and rich biodiversity of the Dulongjiang area provide abundant nectariferous plants for native bees, which provides a solid ecological basis for maintaining traditional beekeeping. In addition, the unique beekeeping methods and rich TEK provide a better chance of survival for native bees (Fig. 9). There has been a growing interest in the development of bee products and their medical, health, diet, and beauty benefits, but little attention has been paid to the crucial role of beekeeping in maintaining ecological balance. Traditional beekeeping is the main income of the Dulong, and it also protects the native bee species and promotes the pollination of nectariferous plants. In addition, it plays an irreplaceable role in maintaining ecosystem stability and promoting ecosystem services of the Dulongjiang area. Over time, traditional beekeeping promotes a sustainable, eco-agricultural economy while increasing income for local residents (Fig. 9).
Conservation of native bees and pollination of nectar plants
Traditional Dulong beekeeping has played a key role in promoting the growth of A. cerana populations, making the native bees very prosperous in the Dulongjiang area. Dulong beekeeping devices, bee colony domestication, pest control, honey cutting technologies, cultural constraints, and other factors related to traditional beekeeping support the protection of native bees and local biodiversity (Table 5). Pollination by bees is essential for nectariferous plants, providing ecosystem services and contributing to ecosystem stability at the same time [37, 38]. Native bees have formed symbiotic relationships with other species during their long-term evolution in the Dulongjiang area. It is this symbiosis that plays a vital role in maintaining local ecological equilibrium, especially for nectariferous plants that rely on A. cerana for pollination.
Contradictions between wildlife protection and traditional beekeeping
The Dulongjiang area has one of the highest abundances of wildlife in China. It is the core area of the Gaoligongshan National Nature Reserve, which is known as the “Animal and Plant Gene Bank” . With the implementation of the natural forest protection project and reverting farmlands to forests, the number of wild animals and their activities has also increased significantly . Beehives in the Dulongjiang area have always been under threat of destruction by wild animals, especially by bear (Ursus thibetanus). Wild animal incidents with beehives, crops, and livestock are increasing year by year in Dulongjiang Township, resulting in huge economic losses to local residents (Fig. 10).
Ursus thibetanus (black bear) is a protected animal species listed in the Red-data Book of China (http://www.zoology.csdb.cn/). Beekeepers are not allowed to harm these animals, reflecting an apparent contradiction between wild animal protection and traditional beekeeping. This contradiction not only causes severe losses to beekeepers’ income but also dispels local people’s enthusiasm in beekeeping.
The regional protection bureau has formulated corresponding compensation measures for damages to beekeeping caused by wild animals. After the beehives are damaged, forest rangers assess the losses. The losses are then compensated for after reporting. Although this method can partially compensate for beekeepers’ losses, evidence of animal damage is hard to collect, and the process can sometimes take a long time, which also decreases beekeepers’ enthusiasm. It is suggested that the local nature protection department work together with local beekeepers to find appropriate solutions, such as beekeeping insurance and establishment of compensation measures suitable for local beekeepers, to ensure that every household who suffers a loss can be compensated properly. Traditional bear-repellent devices, such as scarecrows generally used by Dulong (Fig. 11), have achieved excellent effects in reducing losses. This effective, traditional method of repelling wild animals is also worth promoting.
Exotic bee species, single crop cultivation, and intergenerational discontinuity
Although the geography and weather conditions of the Dulongjiang area are not suitable for exotic bee species to survive, the danger of exotic bee species’ invasion still exists. Monitoring the behavior of non-local beekeepers entering the Dulongjiang area is strongly recommended. In recent years, the Dulong have planted large amounts of Amomum tsaoko, which has brought huge economic benefits. However, single crop cultivation may reduce the distribution of melliferous plants and is not conducive to the survival of native bees. With Dulong people emerging out of poverty, enormous changes have taken place in transportation and economics in the Dulongjiang area. The TEK of beekeeping will inevitably be impacted by modernization. Therefore, it is imperative to record, study, and maintain this TEK. Many local young people are reluctant to participate in beekeeping or learn traditional knowledge. They prefer to work outside or grow cash crops rather than learn the complex trade of beekeeping. The traditional knowledge of beekeeping faces the danger that no one will inherit and perpetuate this knowledge. Therefore, we suggest that training beekeepers on proper beekeeping techniques that attract young generations can promote the protection of TEK.
Traditional Dulong beekeeping uses a variety of plants, and its associated TEK is rich. Thirty-eight species (in 19 families) used in beekeeping and 27 tree species used to make log beehives were recorded. Species from the family Pinaceae and Fagaceae are the most frequently represented. Alnus nepalensis, Pinus yunnanensis, and Juglans regia are preferred by beekeepers for making log beehive because they are abundant, easy to process, durable, and have desirable aromas. Future work will include analysis of nutritive components of honey from traditional Dulong beekeeping and ethnobotanical investigation of melliferous species used in traditional Dulong beekeeping will be conducted. It is necessary to take full advantage of traditional beekeeping to promote a sustainable economy, protect biodiversity, and improve the livelihood of local communities. Thus, a win-win situation can be achieved for culture, ecology, and economy.
Availability of data and materials
All data generated or analyzed during this study are included in this published article.
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We thank Prof. Heng Li from the Kunming Institute of Botany, Chinese Academy of Sciences for her helpful suggestions. We are very grateful to the local people in Dulongjiang Township, Yunnan Province, who provided valuable information about traditional beekeeping. Members of the Ethnobotanical Laboratory at Minzu University of China participated in the field surveys.
This work was supported by grants from the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment of China (2019HJ2096001006), National Natural Science Foundation of China (No. 31761143001, 31870316), Key Laboratory of Ethnomedicine (Minzu University of China) of Ministry of Education of China (KLEM-ZZ201806, KLEM-ZZ201904, and KLEM-ZZ201906), Jiansheng Fresh Herb Medicine R & D Foundation (JSYY-20190101-043), and Minzu University of China (Collaborative Innovation Center for Ethnic Minority Development and YLDXXK201819).
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Cheng, Z., Luo, B., Fang, Q. et al. Ethnobotanical study on plants used for traditional beekeeping by Dulong people in Yunnan, China. J Ethnobiology Ethnomedicine 16, 61 (2020). https://doi.org/10.1186/s13002-020-00414-z
- Apis cerana cerana
- Biodiversity conservation
- Dulong ethnic group
- Ecosystem services
- Traditional beekeeping
- Traditional ecological knowledge