We initiated a collaboration between local government, academia, and citizen scientists to invest... more We initiated a collaboration between local government, academia, and citizen scientists to investigate high frequencies of elevated Escherichia coli bacteria levels in the coastal Short Beach neighborhood of Branford, Connecticut. Citizen scientist involvement enabled collection of short-duration postprecipitation outfall flow water samples (mean E. coli level = 4930 most probable number per 100 mL) and yielded insights into scientific collaboration with local residents. A records review and sanitary questionnaire identified aging properties with septic systems (3.3%) and holding tanks (0.6%) as potential sources of the E. coli contamination. (Am J Public Health. 2022;112(9):1261–1264. https://doi.org/10.2105/AJPH.2022.306943 )
Achieving agricultural sustainability has become a high priority to ensure society's current and ... more Achieving agricultural sustainability has become a high priority to ensure society's current and future food needs without compromising ecosystem health, economic profitability, and human well-being. Organic agriculture has been proposed as an alternative to conventional farming for meeting sustainable goals. However, empirical evidence linking organic farming, human health, and sustainability in the My deep gratitude first goes to my thesis advisor Dr. Vasilis Vasiliou, and my academic advisor, Dr. Joshua Wallach, who not only shared their insightful suggestions on my thesis, but also provided me with continuous and generous support throughout my graduate education at Yale School of Public Health.
Additional file 1: Figure S1. Study area, sampling site and the photos of torreya trees. A Map of... more Additional file 1: Figure S1. Study area, sampling site and the photos of torreya trees. A Map of China showing the study area. B Map of sampling sites (inside, the Aâ F indicate the 6 sample sites). C Grafted torreya tree. D Non-grafted torreya male tree. E Non-grafted torreya female tree. GT grafted torreya, NGT non-grafted torreya. Figure S2. Phylogenetic tree of T. grandis based on cpDNA. A, B, and C referto three sampled sites in the GIAHS area (Fig. S1). Figure S3. Linear relationshipbetween diameter at breast height (DBH) and basal diameter (BD) of NGT trees. Table S1. Relationship between basal diameter and age of a torreya tree. Table S2. Genetic diversity of different components in the ancient torreya tree system basedon 20 microsatellite loci. Table S3. Genetic diversity of GT stock and non-graftedtorreya trees in different age group. Table S4. The tests of effective population sizeand bottleneck for NGT-trees. Table S5. Effective population size and test for genetic bott...
Background Understanding how traditional agriculture systems have been maintained would help desi... more Background Understanding how traditional agriculture systems have been maintained would help design sustainable agriculture. In this study, we examined how farmers have used two types of local trees (Torreya grandis) for stable yield and maintaining genetic diversity in the “globally important agricultural heritage torreya tree system”. The two type of torreya trees are grafted torreya (GT) tree and non-grafted-torreya (NGT) tree. The GT tree has only female and was used to produced seed yields. The NGT tree has both male and female and was used to support GT tree by providing pollens and rootstocks. We first tested the ratio of GT tree to NGT tree, their age groups, ratio of female trees (including GT and NGT trees) to male, and the flowering period of GT and NGT trees. We then tested seed yields and genetic diversity of GT and NGT trees. We further tested gene flow among NGT trees, and the relationship of gene flow with exchange rates of pollens and seeds. Results GT and NGT trees...
We initiated a collaboration between local government, academia, and citizen scientists to invest... more We initiated a collaboration between local government, academia, and citizen scientists to investigate high frequencies of elevated Escherichia coli bacteria levels in the coastal Short Beach neighborhood of Branford, Connecticut. Citizen scientist involvement enabled collection of short-duration postprecipitation outfall flow water samples (mean E. coli level = 4930 most probable number per 100 mL) and yielded insights into scientific collaboration with local residents. A records review and sanitary questionnaire identified aging properties with septic systems (3.3%) and holding tanks (0.6%) as potential sources of the E. coli contamination. (Am J Public Health. 2022;112(9):1261–1264. https://doi.org/10.2105/AJPH.2022.306943 )
Achieving agricultural sustainability has become a high priority to ensure society's current and ... more Achieving agricultural sustainability has become a high priority to ensure society's current and future food needs without compromising ecosystem health, economic profitability, and human well-being. Organic agriculture has been proposed as an alternative to conventional farming for meeting sustainable goals. However, empirical evidence linking organic farming, human health, and sustainability in the My deep gratitude first goes to my thesis advisor Dr. Vasilis Vasiliou, and my academic advisor, Dr. Joshua Wallach, who not only shared their insightful suggestions on my thesis, but also provided me with continuous and generous support throughout my graduate education at Yale School of Public Health.
Additional file 1: Figure S1. Study area, sampling site and the photos of torreya trees. A Map of... more Additional file 1: Figure S1. Study area, sampling site and the photos of torreya trees. A Map of China showing the study area. B Map of sampling sites (inside, the Aâ F indicate the 6 sample sites). C Grafted torreya tree. D Non-grafted torreya male tree. E Non-grafted torreya female tree. GT grafted torreya, NGT non-grafted torreya. Figure S2. Phylogenetic tree of T. grandis based on cpDNA. A, B, and C referto three sampled sites in the GIAHS area (Fig. S1). Figure S3. Linear relationshipbetween diameter at breast height (DBH) and basal diameter (BD) of NGT trees. Table S1. Relationship between basal diameter and age of a torreya tree. Table S2. Genetic diversity of different components in the ancient torreya tree system basedon 20 microsatellite loci. Table S3. Genetic diversity of GT stock and non-graftedtorreya trees in different age group. Table S4. The tests of effective population sizeand bottleneck for NGT-trees. Table S5. Effective population size and test for genetic bott...
Background Understanding how traditional agriculture systems have been maintained would help desi... more Background Understanding how traditional agriculture systems have been maintained would help design sustainable agriculture. In this study, we examined how farmers have used two types of local trees (Torreya grandis) for stable yield and maintaining genetic diversity in the “globally important agricultural heritage torreya tree system”. The two type of torreya trees are grafted torreya (GT) tree and non-grafted-torreya (NGT) tree. The GT tree has only female and was used to produced seed yields. The NGT tree has both male and female and was used to support GT tree by providing pollens and rootstocks. We first tested the ratio of GT tree to NGT tree, their age groups, ratio of female trees (including GT and NGT trees) to male, and the flowering period of GT and NGT trees. We then tested seed yields and genetic diversity of GT and NGT trees. We further tested gene flow among NGT trees, and the relationship of gene flow with exchange rates of pollens and seeds. Results GT and NGT trees...
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