Stream denitrification across biomes and its response to anthropogenic nitrate loading

Author: Mulholland, P.J.; Helton, A.M.; Poole, G.C.; Hall, R.O.; Hamilton, S.K.; Peterson, B.J.; Tank, J.L.; Ashkenas, L.R.; Cooper, L.W.; Dahm, C.N.; Dodds, W.K.; Findlay, S.E.G.; Gregory, S.V.; Grimm, N.B.; Johnson, S.L.; McDowell, W.H.; Meyer, J.L.; Valett, H.M.; Webster, J.R.; Arango, C.P.; Beaulieu, J.J.; Bernot, M.J.; Burgin, A.J.; Crenshaw, C.L.; Johnson, L.T.; Niederlehner, B.R.; O’Brien, J.M.; Potter, J.D.; Sheibley, R.W.; Sobota, D.J.; Thomas, S.M. Description: Anthropogenic addition of bioavailable nitrogen to the biosphere is increasing and terrestrial ecosystems are becoming increasingly nitrogen-saturated, causing more bioavailable nitrogen to enter groundwater and surface…

See more and a link to full text

Will photosynthesis of maize (Zea mays) in the US Corn Belt increase in future CO2 rich atmospheres? An analysis of diurnal courses of CO2 uptake under free-air concentration enrichment (FACE)

Author: Leakey, A.D.B.; Bernacchi, C.J.; Dohleman, F.G.; Ort, D.R.; Long, S.P. Description: The C4 grass Zea mays (maize or corn) is the third most important food crop globally in terms of production and demand is predicted to increase 45% from 1997 to 2020. However, the effects of rising CO2 upon C4 plants, and Z. mays specifically, are not sufficiently understood to allow accurate predictions of future crop production. A rainfed, field experiment utilizing free-air concentration enrichment (FACE) technology in the primary area of global corn production (US Corn Belt) was…

See more and a link to full text

Interactive effects of nitrate and long-term waterlogging on growth, water relations, and gaseous exchange properties of maize (Zea mays L.)

Author: Ashraf, M.; Habib-ur-Rehman, Description: The interactive effect of additional amount of NO3-N and long-term waterlogging on maize was studied in glasshouse conditions. Forty-two-day-old plants were subjected to continuous flooding for 21 days at three different NO3-N regimes (196, 294 and 392 mg N kg-1 soil). Shoot fresh mass and leaf area of waterlogged plants reduced significantly at two higher NO3 regimes. Leaf water potential was generally decreased, whereas osmotic potential increased in all waterlogged plants but much reduction in leaf water potential was found at the highest external NO3…

See more and a link to full text

Effects of source-sink relations on photosynthetic acclimation to elevated CO2

Author: Arp, W.J. Description: While photosynthesis of C3 plants is stimulated by an increase in the atmospheric CO2 concentration, photosynthetic capacity is often reduced after long-term exposure to elevated CO2. This reduction appears to be brought about by end product inhibition, resulting from an imbalance in the supply and demand of carbohydrates. A review of the literature revealed that the reduction of photosynthetic capacity in elevated CO2 was most pronounced when the increased supply of carbohydrates was combined with small sink size. The volume of pots in which plants were…

See more and a link to full text

Absolute power leads to absolute corruption? Impact of power on corruption depending on the concepts of power one holds

Author: Wang, F.; Sun, X. Description: Power has long been linked to the stigma of corruption. Three studies indicated that different power concepts have different implications for corruption behavior and perception. The personalized power concept relates to using power to pursue self-centered goals for one’s own benefit, whereas the socialized power concept relates to using power to pursue other-focused goals for benefiting and helping others. Three studies were conducted to explore the effect of these two types of power concepts on corrupt intention or practice. The power concepts were measured…

See more and a link to full text

Working for the Hierarchical System: The Role of Meritocratic Ideology in the Endorsement of Corruption

Author: Tan, X.; Liu, L.; Huang, Z.; Zheng, W. Description: Corruption has a wide range of corrosive effects on societies, but it is widespread throughout the world. There is a question, however, as to whether corruption is endorsed as an outcome of a legitimate hierarchy and meritocracy. To address this issue, the present study examines the associations between meritocratic ideology and the indicators of corruption by performing two empirical studies with correlational and experimental designs. In Study 1, all variables were measured with scales, and the results demonstrated that meritocratic…

See more and a link to full text

The Dampening Effect of Social Dominance Orientation on Awareness of Corruption: Moral Outrage as a Mediator

Author: Tan, X.; Liu, L.; Huang, Z.; Zhao, X.; Zheng, W. Description: The present study aimed at exploring the role of social dominance orientation (SDO) on awareness of corruption and the mediating effect of moral outrage on this relationship. To accomplish the objectives, we performed three empirical substudies with both correlational and experimental designs. In Substudy 1, SDO, moral outrage, and awareness of corruption were all measured with scales. The results indicated that SDO was negatively with moral outrage and awareness of corruption. In addition, moral outrage mediated the relationship…

See more and a link to full text

Hierarchies, Power Inequalities, and Organizational Corruption

Author: Rosenblatt, V. Description: This article uses social dominance theory (SDT) to explore the dynamic and systemic nature of the initiation and maintenance of organizational corruption. Rooted in the definition of organizational corruption as misuse of power or position for personal or organizational gain, this work suggests that organizational corruption is driven by the individual and institutional tendency to structure societies as group-based social hierarchies. SDT describes a series of factors and processes across multiple levels of analysis that systemically contribute to the initiation and maintenance of social hierarchies and…

See more and a link to full text

Cultural Endorsement of Broad Leadership Prototypes and Wealth as Predictors of Corruption

Author: Kong, D.T.; Volkema, R. Description: Corruption is a social ill that involves public officials’ misuse of entrusted power, which is a function of sociocultural factors. Rarely, however, do researchers view corruption as a leadership-related problem. In the current research, we conceptualize corruption as a leadership-related problem, and propose three broad leadership prototypes based on social value orientation theory and research. We seek to examine (1) how cultural endorsement of self-serving, prosocial, and individualistic leadership prototypes is related to corruption at the societal level and (2) how wealth moderates the…

See more and a link to full text

Organization of projections from the medial nucleus of the amygdala: a PHAL study in the rat

Author: Canteras, N.S.; Simerly, R.B.; Swanson, L.W. Description: The organization of axonal projections from the four recognized parts of the medial amygdalar nucleus (MEA) were characterized with the Phaesolus vulgaris leucoagglutinin (PHAL) method in male rats. The results indicate that the MEA consists of two major divisions, ventral and dorsal, and that the former may also consist of rostral and caudal regions. As a whole, the MEA generates centrifugal projections to several parts of the accessory and main olfactory sensory pathways, and projections to a) several parts of the intrahippocampal…

See more and a link to full text
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.