John Richard Stepp

Michael Sheridan, Roots of Power: The Political Ecology of Boundary Plants (New York: Routledge, 2023) 290 pp., $128.00 (cloth), $43.99 (pbk). ISBN: 978-1032411408.

This study documented the lesser-known indigenous fruits and vegetables used in a montane area of high biocultural diversity in Bangladesh, the Chittagong Hill Tracts (CHTs), and analyzed the nutritional values of selected species. Over 125 species were noted, and based on their frequent uses, 10 plant species were selected for nutritional analysis. All of the analyzed fruits and vegetables contain significant amounts of nutrients. Adoption of these species as alternative sources of food in other parts of Bangladesh could play a key role in improving livelihood and well-being in marginal communities.

The collection and consumption of wild edible plants (WEPs) and fungi is an important part of the foodways of many populations worldwide. Knowledge of WEPs and fungi is considered a significant component of traditional ecological knowledge (TEK), and is greatly impacted by social, economic, political, and cultural contexts and changes. T his study showcases a naturalistic comparison between more traditional villages and villages that were part of a government program to promote walnut production. We document the ethno-species of WEPs and fungi and analyze the corresponding socio-economic implications in an ethnic Nuosu township in the northwest region of Yunnan Province, China. Semi-structured interviews, free lists, household surveys, and cultural consensus analysis were used for data collection and data analysis. We recorded 139 ethno-species of WEPs and fungi, and consensus analysis indicates a good fit of the cultural consensus model with respect to Nuosu people's knowledge on WEPs and fungi. Quantitative analysis shows gender does not have an effect on local knowledge of WEPs and fungi, and different types of villages and travel-time required to collect WEPs and fungi are not correlated with competence scores. However, the correlation between competence scores of WEPs and fungi with gender and travel time show moderate effect-sizes. Age plays an important role in knowledge of WEPs and fungi among Nuosu people in the study township, showing that the older the person, the higher their score. This article illustrates the plight and reality of traditional knowledge about WEPs and fungi of the Nuosu people, revealing a trend that traditional knowledge is gradually changing due to social, economic, and ecological changes.

Humans have dyed textiles and leather, colored food, and paint body parts using natural dyes throughout history. Natural dyes have suffered drastically due to recent socioeconomic changes and replacement with synthetic dye in the textile industry. Hence, it is urgent to study indigenous dye plants and dyeing craft in local communities to protect these resources' potential ecological, economic, and cultural values. In 11 Monpa villages of Mêdog County, South-east Tibet, China, we conducted field research to record the indigenous method of cloth dyeing using madder dye. An aqueous extract of the root of Rubia wallichiana is a traditional madder dye. In this study, we used traditional dye and ethyl alcohol extract of the residue of aqueous extract. Two fabrics were dyed with the extractions in the presence of one of the metallic mordants or biomordants. Pigment compounds from aqueous extraction of madder and ethyl alcohol extraction of recycled madder were evaluated using Phytochemical, UV–visible spectroscopy, and FTIR test. We carried out One-way ANOVA and Duncan's new multiple range method to analyze different dying approaches and conditions. The dyed fabrics were evaluated by indicators of color strength and fastness, including washing, rubbing, and perspiration. The findings revealed the potentiality of biomordants to improve the dyeing properties of madder. The dyeing properties of recycled madder were marginally better than traditional madder. The results revealed the feasibility of enhancing the dyeing property and reuse of the residue from madder dyeing. The improved dyeing and reuse of residue can improve local ecological, economic benefits, and cultural heritage while applying research findings for the subsequent commercialization of plant dyes.

Consumers are increasingly concerned about the environmental and social impacts of their purchases. Prior research has assessed willingness to pay (WTP) for environmental and ethical attributes on foods and beverages such as locally grown, fairly traded, and organically produced. However, few studies have examined WTP for agricultural greenhouse gas (GHG) mitigation, especially in the U.S. and to date, no prior study has examined how knowledge or concerns about climate change motivate WTP for climate-friendly products. The objective of this study was to estimate WTP for agricultural GHG mitigation and examine variability in WTP across consumer characteristics, climate change knowledge and risk perception. A sensory-grounded choice experiment and survey assessing climate change knowledge and risk perception was administrated to specialty food and beverage shoppers in the Midwest and Northeastern U.S. Male and lower-income participants, as well as those at the Midwestern study site were willing to pay a higher premium for agricultural GHG mitigation, relative to females, higher income participants, and those in the Northeastern U.S. Knowledge of climate change and level of concerns for the risks it poses were not significantly associated with increased WTP for agricultural GHG mitigation. This suggests that if consumer demand is going to play a role in driving agricultural GHG mitigation, motivations for such purchasing behavior must be more fully understood.

Ethnobiological Memoirs and Memory

Farmers in China’s tea-growing regions report that monsoon dynamics and other weather factors are changing and that this is affecting tea harvest decisions. To assess the effect of climate change on tea production in China, this study uses historical weather and production data from 1980 to 2011 to construct a yield response model that estimates the partial effect of weather factors on tea yields in China, with a specific focus on East Asian Monsoon dynamics. Tea (Camellia sinensis (L.) Kunze) has not been studied using these methods even though it is an important crop for human nutrition and the economic well-being of rural communities in many countries. Previous studies have approximated the monsoon period using historical average onset and retreat dates, which we believe limits our understanding of how changing monsoon patterns affect crop productivity. In our analysis, we instead estimate the monsoon season across China’s tea growing regions empirically by identifying the unknown breakpoints in the year-by-province cumulative precipitation. We find that a 1% increase in the monsoon retreat date is associated with 0.481%–0.535% reduction in tea yield. In the previous year, we also find that a 1% increase in the date of the monsoon retreat is associated with a 0.604% decrease in tea yields. For precipitation, we find that a 1% increase in average daily precipitation occurring during the monsoon period is associated with a 0.184%–0.262% reduction in tea yields. In addition, our models show that 1% increase in the average daily monsoon precipitation from the previous growing season is associated with 0.258%–0.327% decline in yields. We also find that a 1% decrease in solar radiation in the previous growing season is associated with 0.554%-0.864% decrease in tea yields. These findings suggest the need for adaptive management and harvesting strategies given climate change projections and the known negative association between excess rainfall and delayed monsoon retreat on tea quality and yield.