Search for: All records

Abstract Tree canopies are known to elevate atmospheric inputs of both mercury (Hg) and methylmercury (MeHg). While foliar uptake of gaseous Hg is well documented, little is known regarding the temporal dynamics and origins of MeHg in tree foliage, which represents typically less than 1% of total Hg in foliage. In this work, we examined the foliar total Hg and MeHg content by following the growth of five individual trees of American Beech (Fagus grandifolia) for one growing season (April–November, 2017) in North Carolina, USA. We show that similar to other studies foliar Hg content increased almost linearly over time, with daily accumulation rates ranging from 0.123 to 0.161 ng/g/day. However, not all trees showed linear increases of foliar MeHg content along the growing season; we found that 2 out of 5 trees showed elevated foliar MeHg content at the initial phase of the growing season but their MeHg content declined through early summer. However, foliar MeHg content among all 5 trees showed eventual increases through the end of the growing season, proving that foliage is a net accumulator of MeHg while foliar gain of biomass did not “dilute” MeHg content. 

This article examines intersectional praxis as an approach to institutional transformation, arguing that intersectionality is both a catalyst for and outcome of gender equity efforts in the social sciences and other academic STEM fields. As such, approaching gender equity intersectionally can be understood as a way that theory and practice are co-constitutive in social science and hence an important aspect of transforming academic institutions. Through a case study of the US National Science Foundation (NSF) ADVANCE program for gender equity in STEM, I look at the development of ADVANCE from an effort to support women in scientific fields to becoming a program for institutional transformation grounded in an intersectional understanding of women's inequity in the academic labor force. I ask two related questions in the efforts to address gender inequities in STEM. First, what is the relationship between academic institutions (which are simultaneously sites for the discovery of knowledge and gender inequality) and the National Science foundation, as the premier American academic institutional funding agency? Second, how has this relationship, through those working on ADVANCE, fundamentally shifted the understanding of the social scientific tools and strategies necessary to advance equity for women in academia? In looking at these questions, I argue that, beyond women's representation in social sciences and academia broadly, intersectionality is an important scholarly advance in social science that offers a dialectical tool for change.