| 1. |
- Arndt, D. S., et al.
(author)
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STATE OF THE CLIMATE IN 2017
- 2018
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In: Bulletin of The American Meteorological Society - (BAMS). - : American Meteorological Society. - 0003-0007 .- 1520-0477. ; 99:8, s. S1-S310
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Research review (peer-reviewed)
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| 2. |
- Abbafati, Cristiana, et al.
(author)
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- 2020
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Journal article (peer-reviewed)
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| 3. |
- Hedlund, John, et al.
(author)
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Agriculture, Pesticide Use, and Economic Development: A Global Examination (1990–2014)
- 2020
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In: Rural Sociology. - : Wiley. - 0036-0112 .- 1549-0831. ; 85, s. 519-544
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Journal article (peer-reviewed)abstract
- Modern agricultural production typically requires large quantities of chemical pesticides, a potential source of both environmental and human harm. Previous social science research has suggested that environmental problems such as those associated with pesticide use may begin to decline at higher levels of economic development. Using fixed effects models, we examine whether this possible relationship holds within nations and over time. This study draws on data from the World Bank as well as pesticide use data from the Food and Agriculture Organization of the United Nations to examine the relationship between pesticide use and economic development within nations from 1990 to 2014. The findings are considered from theoretical perspectives in environmental sociology on the drivers of environmental impacts: the treadmill of production theory, structural human ecology, ecological modernization theory, and the environmental Kuznets curve hypothesis. The results of this study show a positive relationship between economic development and pesticide consumption over time, with no decline in use at higher levels of economic development. Thus, they generally support the claims made by treadmill of production and structural human ecology.
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| 4. |
- Kessler, Richard, et al.
(author)
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First-Year Sloan Digital Sky Survey-II Supernova Results : Hubble Diagram and Cosmological Parameters
- 2009
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In: Astrophysical Journal Supplement Series. - : American Astronomical Society. - 0067-0049 .- 1538-4365. ; 185:1, s. 32-84
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Journal article (peer-reviewed)abstract
- We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. These data fill in the redshift "desert" between low- and high-redshift SN Ia surveys. Within the framework of the MLCS2K2 light-curve fitting method, we use the SDSS-II SN sample to infer the mean reddening parameter for host galaxies, RV = 2.18 ± 0.14stat ± 0.48syst, and find that the intrinsic distribution of host-galaxy extinction is well fitted by an exponential function, P(AV ) = exp(-AV /τV), with τV = 0.334 ± 0.088 mag. We combine the SDSS-II measurements with new distance estimates for published SN data from the ESSENCE survey, the Supernova Legacy Survey (SNLS), the Hubble Space Telescope (HST), and a compilation of Nearby SN Ia measurements. A new feature in our analysis is the use of detailed Monte Carlo simulations of all surveys to account for selection biases, including those from spectroscopic targeting. Combining the SN Hubble diagram with measurements of baryon acoustic oscillations from the SDSS Luminous Red Galaxy sample and with cosmic microwave background temperature anisotropy measurements from the Wilkinson Microwave Anisotropy Probe, we estimate the cosmological parameters w and ΩM, assuming a spatially flat cosmological model (FwCDM) with constant dark energy equation of state parameter, w. We also consider constraints upon ΩM and ΩΛ for a cosmological constant model (ΛCDM) with w = -1 and non-zero spatial curvature. For the FwCDM model and the combined sample of 288 SNe Ia, we find w = -0.76 ± 0.07(stat) ± 0.11(syst), ΩM = 0.307 ± 0.019(stat) ± 0.023(syst) using MLCS2K2 and w = -0.96 ± 0.06(stat) ± 0.12(syst), ΩM = 0.265 ± 0.016(stat) ± 0.025(syst) using the SALT-II fitter. We trace the discrepancy between these results to a difference in the rest-frame UV model combined with a different luminosity correction from color variations; these differences mostly affect the distance estimates for the SNLS and HST SNe. We present detailed discussions of systematic errors for both light-curve methods and find that they both show data-model discrepancies in rest-frame U band. For the SALT-II approach, we also see strong evidence for redshift-dependence of the color-luminosity parameter (β). Restricting the analysis to the 136 SNe Ia in the Nearby+SDSS-II samples, we find much better agreement between the two analysis methods but with larger uncertainties: w = -0.92 ± 0.13(stat)+0.10 -0.33(syst) for MLCS2K2 and w = -0.92 ± 0.11(stat)+0.07 -0.15 (syst) for SALT-II.
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| 5. |
- Longo, Stefano, et al.
(author)
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Aquaculture and the displacement of fisheries captures
- 2019
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In: Conservation Biology. - : Wiley. - 0888-8892 .- 1523-1739. ; 33:4, s. 832-832
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Journal article (peer-reviewed)abstract
- In modern aquaculture, animal-production technology is used to increase aquatic food sources. Such controlled rearing of seafood can, in principle, shift the pressure off wild stocks and aquatic ecosys- tems by reducing fishing activities, which may advance marine conservation goals. We examined resource displacement—the reduced consumption of a resource due to its replacement with a more environmentally benign substitute—in fisheries. We employed panel regression techniques in an analysis of time-series data from 1970 through 2014 to assess the extent to which aquaculture production displaced fisheries captures for all nations for which data were available. We estimated 9 models to assess whether aquaculture production suppresses captures once other factors related to demand have been controlled for. Only 1 model predicted significant suppression of fisheries captures associated with aquaculture systems within nations over time. These results suggest that global aquaculture production does not substantially displace fisheries capture; instead, aquaculture production largely supplements fisheries capture.
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| 6. |
- Longo, Stefano, 1969, et al.
(author)
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Key challenges to the corporate biosphere stewardship research program: inequity, reification, and stakeholder commensurability
- 2022
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In: Global Sustainability. - : Cambridge University Press (CUP). - 2059-4798. ; 5
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Journal article (peer-reviewed)abstract
- Non-Technical Summary Research on corporate biosphere stewardship and the related concept of keystone actor has proliferated in recent years. We scrutinize the program focusing on issues and assumptions associated with inequality, naturalizing social processes, or reification, and characterizing corporations as equivalent stakeholders in sustainable development with other actors and organizations. As a result, we argue the program does not promote the stated claim of transformative change for sustainability. We suggest that the research program should develop a deeper analysis of social dynamics, forces, and structures, based in social theory, particularly sociological work, which can help reveal common taken for granted assumptions. Technical Summary We highlight important assumptions associated with the research program in sustainability science developed around corporate biosphere stewardship and the promise of science-business initiatives. In doing so, we interrogate a central concept in this research, keystone actors. We analyze the program based on associated research outputs and communications, focusing on three key challenges 1) inequities related to the concentration of political-economic power 2) concerns with naturalizing social processes, or reification, and 3) the limitations of characterizing corporations as commensurable stakeholders in sustainable development. This research program has revealed some important conditions and dynamics in relation to consolidation and concentration in global industries. However, it has been limited by insufficient integration of knowledge from social science, particularly sociology. Thus, the approach tends to undertheorize social dynamics, processes, and structures. Despite being framed as an effort at improving the prospects for transformative change, the implications, outcomes, and recommendations that emerge from this research program may inadvertently promote increased control and power of elite actors by presenting an ostensible inevitability of corporate dominance for bringing about social welfare and sustainability. We suggest greater attention to social structural dynamics, and particularly social struggles and social movements, when considering the potential for transformational change for sustainability.
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| 7. |
- Longo, Stefano, et al.
(author)
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Key challenges to the corporate biospherestewardship research program : inequity, reification, and stakeholder commensurability
- 2022
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In: Global Sustainability. - : Cambridge University Press (CUP). - 2059-4798. ; 5:e9, s. 1-7
-
Journal article (peer-reviewed)abstract
- We highlight important assumptions associated with the research program in sustainability science developed around “corporate biosphere stewardship” and the promise of “science-business initiatives.” In doing so, we interrogate a central concept in this research, “keystone actors.” We analyze the program based on associated research outputs and communications, focusing on three key challenges 1) inequities related to the concentration of political-economic power 2) concerns with naturalizing social processes, or reification,and 3) the limitations of characterizing corporations as commensurable stakeholders in sustainable development. This research program has revealed some important conditions and dynamics in relation to consolidation and concentration in global industries. However, it has been limited by insufficient integration of knowledge from social science, particularly sociology. Thus, the approach tends to undertheorize social dynamics, processes, and structures. Despite being framed as an effort at “improving the prospects for transformative change,” the implications, outcomes, and recommendations that emerge from this research program may inadvertently promote increased control and power of elite actors by presenting an ostensible inevitability of corporate dominance for bringing about social welfare and sustainability. We suggest greater attention to social structural dynamics, and particularly social struggles and social movements, when considering the potential for transformational change for sustainability
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| 8. |
- Longo, Stefano, et al.
(author)
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Sociology for sustainability science
- 2021
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In: Discover Sustainability. - : Springer Science and Business Media LLC. - 2662-9984. ; 2
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Journal article (peer-reviewed)abstract
- Sociological insights are often underutilized in sustainability science. To further strengthen its commitment to interdisciplinary problem-driven, solutions-oriented research, sustainability science can better incorporate fundamental sociological conceptions into its core. We highlight four aspects of sociological thought that we consider crucial for advancing sustainability science research: (1) social construction and critical realism, (2) structure and agency, (3) historical specificity, and (4) collective action. We draw on examples from sociology to support a dynamic understanding of how social relations interact with the bio-geo-physical world. This necessary integration of sociological insights, we argue, is critical to generate comprehensive assessments of the causes and consequences of human-induced environmental change, and tend to be overlooked or oversimplified within the field of sustainability science. Beyond that, it can stimulate the development and implementation of viable solutions to sustainability challenges.
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| 9. |
- Longo, Stefano, 1969, et al.
(author)
-
Sociology for sustainability science
- 2021
-
In: Discover Sustainability. - : Springer Science and Business Media LLC. - 2662-9984. ; 2
-
Journal article (peer-reviewed)abstract
- Sociological insights are often underutilized in sustainability science. To further strengthen its commitment to interdisciplinary problem-driven, solutions-oriented research, sustainability science can better incorporate fundamental sociological conceptions into its core. We highlight four aspects of sociological thought that we consider crucial for advancing sustainability science research: (1) social construction and critical realism, (2) structure and agency, (3) historical specificity, and (4) collective action. We draw on examples from sociology to support a dynamic understanding of how social relations interact with the bio-geo-physical world. This necessary integration of sociological insights, we argue, is critical to generate comprehensive assessments of the causes and consequences of human-induced environmental change, and tend to be overlooked or oversimplified within the field of sustainability science. Beyond that, it can stimulate the development and implementation of viable solutions to sustainability challenges.
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| 10. |
- McKee, Lauren, 1985-, et al.
(author)
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Introducing endo-xylanase activity into an exo-acting arabinofuranosidase that targets side chains
- 2012
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In: Proceedings of the National Academy of Sciences of the United States of America. - : NATIONAL ACADEMY OF SCIENCES. - 0027-8424 .- 1091-6490. ; 109:17
-
Journal article (peer-reviewed)abstract
- The degradation of the plant cell wall by glycoside hydrolases is central to environmentally sustainable industries. The major polysaccharides of the plant cell wall are cellulose and xylan, a highly decorated beta-1,4-xylopyranose polymer. Glycoside hydrolases displaying multiple catalytic functions may simplify the enzymes required to degrade plant cell walls, increasing the industrial potential of these composite structures. Here we test the hypothesis that glycoside hydrolase family 43 (GH43) provides a suitable scaffold for introducing additional catalytic functions into enzymes that target complex structures in the plant cell wall. We report the crystal structure of Humicola insolens AXHd3 (HiAXHd3), a GH43 arabinofuranosidase that hydrolyses O3-linked arabinose of doubly substituted xylans, a feature of the polysaccharide that is recalcitrant to degradation. HiAXHd3 displays an N-terminal five-bladed beta-propeller domain and a C-terminal beta-sandwich domain. The interface between the domains comprises a xylan binding cleft that houses the active site pocket. Substrate specificity is conferred by a shallow arabinose binding pocket adjacent to the deep active site pocket, and through the orientation of the xylan backbone. Modification of the rim of the active site introduces endo-xylanase activity, whereas the resultant enzyme variant, Y166A, retains arabinofuranosidase activity. These data show that the active site of HiAXHd3 is tuned to hydrolyse arabinofuranosyl or xylosyl linkages, and it is the topology of the distal regions of the substrate binding surface that confers specificity. This report demonstrates that GH43 provides a platform for generating bespoke multifunctional enzymes that target industrially significant complex substrates, exemplified by the plant cell wall.
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