1. Introduction
Biodiversity is the cornerstone for the survival and development of human society and one of the important indicators of the level of ecological civilization. As a national strategy, biodiversity conservation is related to human health and well-being. It is of great significance to the implementation of sustainable development and building a beautiful China [
1]. The Global Assessment Report on Biodiversity and Ecosystem Services published by IPBES in 2019 pointed out that global biodiversity faces huge threats. The impact of human activities and land use changes have contributed to an increase in the risk of global species extinction and a decline in species population abundance, and has led to species’ extinction rates that are at least 10-100 times faster than natural background rates [
2,
3]. How to reverse the trend of biodiversity loss and species extinction in the future is the focus of researchers.
The Conference of the Parties at the 15th meeting of the Convention on Biological Diversity (COP 15) adopted the Kunming-Montreal Global Biodiversity Framework (GBF), which includes 4 long-term goals and 23 action goals. The GBF, which extends the biodiversity conservation and management strategies specified in the Aichi Biodiversity Goals, is crucial to stopping ecosystem degradation and reversing the trend of global biodiversity loss [
4,
5]. At the second phase of the COP15, the Xishuangbanna government hosted the theme meeting of "Regional Biodiversity Conservation and Cooperation". The meeting shared cases such as the protection and rescue of Asian elephants, the protection of the sacred forests of Dai people and the acquisition and benefit sharing of biological genetic resources and traditional knowledge. These cases show the effectiveness of biodiversity conservation in Xishuangbanna to the world and provide a reference for countries to implement the GBF. Xishuangbanna is one of Indo-Burma's biodiversity hotspots and occupies an important strategic position in global biodiversity conservation [
6,
7]. Its tropical forests play an important role in global terrestrial biodiversity [
8]. Xishuangbanna has unique climatic conditions and diverse ecosystems, and is extremely rich in species and genetic resources. In terms of species diversity, according to the Xishuangbanna Yearbook (2021 edition), there are more than 5,000 species of plants in the state, including 153 species of endemic plants and 134 species of endangered plants. There are 762 species of vertebrates, including 529 species of terrestrial vertebrates and more than 3,000 species of invertebrates. The species resources are very rich [
9]. According to the newly released List of National Key Protected Wild Plants and Animals Distributed in Various Cities of Yunnan Province (2021) by the Yunnan Provincial Forestry and Grassland Bureau, there are 174 species of wild plants under national key protection in Xishuangbanna, including 10 species under first-class protection and 164 species under second-class protection. There are 179 species of terrestrial wildlife under key state protection, of which 39 are under first class protection and 140 are under second class protection (
Table 1).
At the same time, Xishuangbanna also has rich and valuable genetic resources, especially many cultivated plants and domestic animals with wide uses and high economic value. Their wild type or related species can be found in Xishuangbanna [
10]. For example, cultivated mango can be found in Xishuangbanna in its wild relatives or the original species
Mangifera sylvatica. Indian bison, monitor lizard and other species in Xishuangbanna are highly valuable genetic resources [
11]. In addition, there are also some ancient relict species and endemic species in the state, such as
Alsophila spinulosa and
Cycas pectinata, which have great medicinal value. In terms of ecosystem diversity, Xishuangbanna has multiple ecosystems such as forests, rivers, wetlands, meadows and shrubs, among which the forest ecosystem is extremely rich in biodiversity and is the habitat of many organisms, with high ecological value [
12]. According to the vegetation type classification standard of Yunnan Vegetation, the forest vegetation in Xishuangbanna can be divided into 7 main vegetation types, such as tropical rain forest, tropical monsoon forest, including 32 typical groups [
13,
14].
The current global biodiversity hotspots all have a common feature, that is, these areas are also rich in cultural diversity [
15]. Xishuangbanna is not only a biodiversity hotspot, but also has rich ethnic and cultural diversity. Xishuangbanna has been inhabited by 13 ethnic groups for generations and has formed diverse ethnic ecological cultures, such as the firewood culture of the Dai people, the terraced field culture of the Hani people, and the slash-and-burn agricultural culture of the Jinuo people [
16]. Ethnic minority communities are natural germplasm banks of local crop varieties, as well as the living museum of traditional farming techniques and ecological agriculture culture. The Jinuo people, who are engaged in rotation agriculture in Jinuo Mountain, are the people who mainly cultivate upland rice. According to the survey, before the 1950s, there were more than 100 upland rice varieties in Jinuo Mountain [
17]. The Jinuo people used traditional ecological wisdom to preserve upland rice varieties and enrich the local agricultural germplasm resource bank. However, due to the planting of cash crops such as rubber and the loss of traditional knowledge, more than 30 traditional upland rice varieties have been lost today, and only 71 upland rice varieties are still preserved, including 16 early-maturing varieties, 35 medium-maturing varieties, and 20 late-maturing varieties [
18]. Xishuangbanna is not only a region rich in biodiversity and traditional knowledge, but also a hotspot for the loss of genetic resources and traditional knowledge. It faces the urgent task of protecting biodiversity and related traditional knowledge. Strengthening and promoting the protection and sustainable use of traditional knowledge related to biodiversity is an important task of the China National Biodiversity Conservation Strategy and Action Plan (2023-2030). This study selected the Jinuo community, a long-dwelling ethnic group in Xishuangbanna, to conduct a survey on traditional knowledge related to biodiversity. A total of 490 entries of traditional knowledge were collected, and the diversity index of traditional knowledge was used for quantitative analysis to understand the richness of traditional knowledge of Jino people, so as to provide reference for sustainable utilization of biological resources. It also analyzes the progress, achievements and current challenges of biodiversity conservation in Xishuangbanna and puts forward corresponding suggestions, in order to provide a reference for Yunnan to strengthen biodiversity protection and promote the implementation of GBF.
4. Challenges
(1) The loss of traditional knowledge related to biodiversity is serious. In the long-term production and living practices, ethnic groups have accumulated a large amount of traditional knowledge and technology related to the utilization of biological resources. The traditional knowledge involves many aspects such as agriculture, forestry, medicine, diet, literature and art. Under the imperfect intellectual property system, a lot of traditional knowledge is lost to foreign countries and used for business or patent applications, but the holders of traditional knowledge do not enjoy the benefits [
63]. As production and lifestyle changes, traditional knowledge also faces the risk of disappearing. The Jinuo people living in Jinuo Mountain have developed slash-and-burn livelihood that is compatible with the environment. The slash-and-burn cultivation contains rich ecological wisdom and embodies the rational development and utilization of land [
64]. With the development of the times, this way of livelihood has been abandoned and the related traditional knowledge such as agricultural calendars and sacrificial rituals have also disappeared. How to protect and inherit traditional knowledge and promote fair and equitable sharing of benefits arising from the utilization of traditional knowledge is a focus that the Xishuangbanna government should pay attention to in the process of protecting biological diversity.
(2) The protection of species is insufficient and there is a protection gap in Xishuangbanna. At present, relevant government departments pay more attention to the protection of rare and endangered species with economic value, social value and scientific research value, while not paying enough attention to the protection of other species, resulting in certain deviations in the scope of protection [
65]. Xishuangbanna has established a relatively complete protected area system, but the protection scope of the designated protected areas is limited. These protected areas are separated by villages, farmland, roads, etc., and lack of connectivity, which hinders species exchange. Due to population growth and rapid economic development, forest land has been encroached and natural forest area has been reduced, resulting in serious fragmentation of wild animal habitats and the risk of population degradation and extinction, further leading to the loss of biodiversity.
(3) Land use changes dramatically. Land is the carrier of biodiversity, and the change of land use will lead to the loss of biodiversity and the decline of ecological service functions. Rational use of land is an important means to protect biodiversity. Due to population pressure and rapid socioeconomic development, land use in Xishuangbanna has undergone significant changes in recent years, mainly manifested in the sharp decrease in the area of natural forests, the fragmentation of tropical rainforests, and the continuous expansion of the areas of economic plantations such as rubber plantations and tea gardens. In the ten years from 2000 to 2010, rubber prices tripled, and the rubber planting area in Xishuangbanna increased by 1374.1 km
2. The expanded rubber forests were mainly converted from forestland. As a result, there are a large number of unsuitable planting areas with "super altitude, super latitude and super slope", resulting in negative ecological effects such as water shortage, soil quality decline and biodiversity decrease in some areas. Due to the slowdown in rubber demand and the reduction in available land area after 2010, the rubber area of the whole state only increased by 97.1 km
2 in 2018 [
66,
67]. In addition, as Xishuangbanna Pu er tea becomes more and more accepted by the public, the area of Xishuangbanna tea gardens increased dramatically between 2011 and 2016. The soaring price of tea makes tea farmers in high-altitude areas see business opportunities and they even cut down forests to grow tea. Unreasonable deforestation for tea planting changes the original habitat environment, and also changes the traditional planting methods of tea trees and the ecosystem of tea gardens [
68].
5. Recommendations
(1) Protect the traditional culture of ethnic minorities, conduct surveys and catalogs of traditional knowledge related to biodiversity, and promote benefit sharing. Taking the Jinuo people as an example, through investigation and quantitative analysis, it has been found that the Jinuo people have rich traditional knowledge related to biodiversity, especially traditional culture related to biodiversity and traditional knowledge related to agricultural genetic resources. For thousands of years, this traditional knowledge has played an important role in the protection of natural sacred sites, agricultural germplasm resources and religious plants, and has had a profound impact on the long-term maintenance of biodiversity habitats. Therefore, it is necessary to carry out a background survey of traditional knowledge, not only for the Jinuo people, but also for other ethnic groups. It also conducts registrations and document cataloging, and establishes online databases to timely understand and update the preservation status of traditional knowledge related to biological resources in ethnic minority areas. Meanwhile, a system of obtaining and benefit-sharing genetic resources and related traditional knowledge will be established in Xishuangbanna to provide a model for the utilization of biological resources in China and even the world.
(2) Formulate local regulations for biodiversity protection in Xishuangbanna, strengthen the protection of wild animal and plant resources, and promote the improvement of the legal system for biodiversity protection. The legalization of biodiversity is the main path to mainstreaming biodiversity and is also a basic requirement for fulfilling the GBF. Xishuangbanna is one of the most biodiverse areas in China. In order to protect the local biological resources, the state government has formulated regulations on the management of nature reserves and the protection of forest resources. However, the scope of protection of these separate regulations is limited and the object of protection is relatively simple. Therefore, it is necessary to introduce a special law for biodiversity protection to make the scope of protection more comprehensive and make it possible to reverse biodiversity loss [
69]. In terms of the protection of wild plants, we actively promote the protection of PSESP, the rescue of ancient tea trees, and the establishment of rare and endangered plant protection communities. In terms of the protection of wild animals, we should actively promote the preparatory work for the establishment of the Asian Elephant National Park, and continue to promote the cross-regional protection of the Asian elephant population and the construction of food source bases. At the same time, the construction of biological protection corridors is carried out to enhance the connectivity between nature reserves and prevent population isolation to achieve the purpose of biodiversity protection [
70].
(3) Rationally utilize land resources to promote biodiversity conservation and sustainable resource utilization. Land use change has been the direct driving factor with the largest negative impact on nature since 1970 and is one of the major threats to biodiversity loss. Target 1 of GBF emphasizes the protection of highly important areas for biodiversity (including ecosystems with high ecological integrity) through spatial planning so that biodiversity loss is close to zero before 2030 [
71]. In order to fulfill Target 1, the state government will strengthen spatial planning, rationally utilize land, build single rubber plantations and tea gardens into environmentally friendly rubber gardens and ecological tea gardens, and pay attention to the improvement of land utilization rate and the overall protection of the ecosystem [
72]. Meanwhile, ecological protection red lines and cultivated land protection red lines must be strictly observed. The land use in the protected areas and ecological red lines is relatively stable, but the land use in the edge areas of the red lines changes rapidly, so attention should be paid to and rational planning should be carried out.
6. Conclusions
Xishuangbanna's natural forests are particularly rich in biodiversity. Although it only accounts for 0.2% of China's land area, it contains more than 25% of China's flora and fauna [
73]. Xishuangbanna tropical rainforest is special and irreplaceable and has extremely high conservation value. There are 13 ethnic groups that have lived in Xishuangbanna for generations. The clothing, food, housing, transportation, medicine, health and religious beliefs of each ethnic group are closely related to the local biodiversity, creating a rich and colorful ethnic culture, including a large amount of traditional knowledge. Traditional knowledge is a hot topic in international conventions such as the Convention on Biological Diversity, mainly due to its important research value, economic potential and specific social and historical background. We conducted a survey on the Jinuo people living in the core area of the tropical rain forest. The Jinuo people have relatively rich traditional knowledge related to biodiversity and have played an important role in protecting local agricultural germplasm resources and species. However, the diversity index of their traditional medical knowledge is very low. This is mainly because the proportion of knowledge related to medicinal plants is high, the amount of traditional medical theoretical knowledge, traditional therapies, and drug processing technology is relatively small, and the heterogeneity of traditional knowledge is low. Due to the popularization of modern science and technology and the increase of medical choice opportunities, more people will choose modern medical treatment instead of folk herbal medicine. As a result, the traditional therapies of the Jinuo people have been affected, and the Jinuo medicine is facing the dilemma of inheritance. Strengthening the investigation and cataloging of traditional knowledge related to biodiversity of ethnic minorities, especially traditional medicinal knowledge, is an important way to protect local biological resources. By systematically reviewing the progress and effectiveness of biodiversity conservation in Xishuangbanna, this paper points out that it has established an in-situ conservation network mainly based on nature reserves, and ex-situ protection is also advancing in an orderly manner, and citizens' awareness of biodiversity protection is generally improved.