Origin, transport and fate of organic matter in Florida Bay: A biomarker record of historical environmental changes

The Everglades are undergoing the world largest wetland restoration project with the aim of returning this system to hydrological conditions in place prior to anthropogenic modifications. Therefore, it is essential to know what these pristine conditions were. In this work, molecular marker (biomarker) distributions and carbon stable isotopic signatures in sediment samples were employed to assess historical environmental changes in Florida Bay over approximately the last 4000 years. Two biomarkers of terrestrial plants, particularly for mangroves (taraxerol and C29 n-alkane), combined with two seagrass proxies (the Paq and the C25/C 27 n-alkan-2-one ratio) revealed a sedimentary environmental shift from freshwater marshes to mangrove swamps and then to seagrass dominated marine ecosystems, likely as a result of sea-level rise in Florida Bay since the Holocene. The maximum values for the Paq and the C 25/C27 n-alkan-2-ones occurred during the 20th century, suggesting that the greatest abundance of seagrass cover is a recent rather than a historical, long-term phenomenon. The greater oscillation in frequency and amplitude for the biomarkers after 1900 potentially reflects an ecosystem under increasing anthropogenic stress. Several algal biomarkers such as C20 highly branched isoprenoids (HBIs), C 25 HBIs and dinosterol indicative of cyanobacteria, diatom and dinoflagellate organic matter inputs respectively, increased dramatically in the latter part of the 20th century and were attributed to recent anthropogenic changes in Florida Bay. ^ The highlight of this work is the development of HBIs as paleo-proxies. As biomarkers of diatoms, the C25 HBIs in the core from the central bay displayed the highest concentration at mid depth, reflecting strong historical inputs of diatom-derived sedimentary OM during that period. In fact, the depth profile of C25 HBIs coincided quite well with historical variations in diatom abundance and variations in diatom species composition in central Florida Bay based on the results of fossil diatom species analysis by microscopy. This study provides evidence that some C25 HBIs can be applied as biomarkers for certain diatom inputs in paleoenvironmental studies. The sources of C20 and C30 HBIs and their potential applicability as paleo-proxies were also investigated and their sources assessed based on their δ13C distributions. ^

Physiological responses of red mangroves to the climate in the Florida Everglades

This manuscript reports the findings of physiological studies of red mangrove (Rhizophora mangle L.) conducted from June to August 2001 and from May to June 2003 in the Florida Everglades. In situ physiological measurements were made using environmentally controlled gas exchange systems. The field investigations were carried out to define how regional climate constrains mangrove physiology and ecosystem carbon assimilation. In addition, maximum carboxylation and photosynthetic active radiation (PAR) limited carbon assimilation capacities were investigated during the summer season to evaluate whether ecophysiological models developed for mesophyte plant species can be applied to mangroves. Under summertime conditions in the Florida Everglades, maximum foliar carbon dioxide (CO2) assimilation rates reached 18 μmol CO2 m−2 s−1. Peak molar stomatal conductance to water vapor (H2O) diffusion reached 300 mmol H2O m−2 s−1. Maximum carboxylation and PAR‐limited carbon assimilation rates at the foliage temperature of 30°C attained 76.1 ± 23.4 μmol CO2 m−2 s−1 and 128.1 ± 32.9 μmol (e−) m−2 s−1, respectively. Environmental stressors such as the presence of hypersaline conditions and high solar irradiance loading (>500 W m−2 or >1000 μmoles of photons m−2 s−1 of PAR) imposed sharp reductions in carbon assimilation rates and suppressed stomatal conductance. On the basis of both field observations and model analyses, it is also concluded that existing ecophysiological models need to be modified to consider the influences of hypersaline and high radiational loadings on the physiological responses of red mangroves.

The Tax Reform Act of 1986: Impact On Hospitality Industries

In her discussion - The Tax Reform Act Of 1986: Impact On Hospitality Industries - by Elisa S. Moncarz, Associate Professor, the School of Hospitality Management at Florida International University, Professor Moncarz initially states: “After nearly two years of considering the overhaul of the federal tax system, Congress enacted the Tax Reform Act of 1986. The impact of this legislation is expected to affect virtually all individuals and businesses associated with the hospitality industry. This article discusses some of the major provisions of the tax bill, emphasizing those relating to the hospitality service industries and contrasting relevant provisions with prior law on their positive and negative effects to the industry. “On October 22, 1986, President Reagan signed the Tax Reform Act of 1986 (TRA 86) with changes so pervasive that a recodification of the income tax laws became necessary…,” Professor Moncarz says in providing a basic history of the bill. Two, very important paragraphs underpin TRA 86, and this article. They should not be under-estimated. The author wants you to know: “With the passage of TRA 86, the Reagan administration achieved the most important single domestic initiative of Reagan's second term, a complete restructuring of the federal tax system in an attempt to re-establish fairness in the tax code…,” an informed view, indeed. “These changes will result in an estimated shift of over $100 billion of the tax burden from individuals to corporations over the next five years [as of this article],” Professor Moncarz enlightens. “…TRA 86 embraces a conversion to the view that lowering tax rates and eliminating or restricting tax preferences (i.e., loopholes) “would be more economically and socially productive.” Hence, economic decisions would be based on economic efficiency as opposed to tax effect,” the author asserts. “…both Congress and the administration recognized from its inception that the reform of the tax code must satisfy three basic goals,” and these goals are identified for you. Professor Moncarz outlines the positive impact TRA 86 will have on the U.S. economy in general, but also makes distinctions the ‘Act will have on specific segments of the business community, with a particular eye toward the hospitality industry and food-service in particular. Professor Moncarz also provides graphs to illustrate the comparative tax indexes of select companies, encompassing the years 1883-through-1985. Deductibility and its importance are discussed as well. The author foresees Limited Partnerships, employment, and even new hotel construction and/or rehabilitation being affected by TRA 86. The article, as one would assume from this type of discussion, is liberally peppered with facts and figures.

A profile of travelers who are willing to stay in environmentally friendly hotel

The purpose of this study is to describe travelers that have indicated they are willing to stay in green hotel in order to better understand the market segment. There is very little knowledge about these types of travelers, thus making it difficult for hoteliers to know how to create marketing campaigns that target them. Data were collected via an online survey company. Behavior characteristics provided a more distinguishing profile of the traveler than did demographics or psychographics. Most travelers were willing to pay the same amount for a green hotel as a traditional hotel. Implications, future research, and limitations are discussed.

Editor's choice Regional trade agreements and export competitiveness: the uncertain path of Nicaragua’s apparel exports under CAFTA

The Central American Free Trade Agreement (CAFTA) has been a mixed blessing for economic development. While exports to the US economy have increased, dependency may hinder economic growth if countries do not diversify or upgrade before temporary provisions expire. This article evaluates the impact of the temporary Tariff Preference Levels (TPLs) granted to Nicaragua under CAFTA and the consequences of TPL expiration. Using trade statistics, country- and firm-level data from Nicaragua’s National Free Zones Commission (CNZF) and data from field research, we estimate Nicaragua’s apparel sector will contract as much as 30–40% after TPLs expire. Our analysis underscores how rules of origin and firm nationality affect where and how companies do business, and in so doing, often constrain sustainable export growth.

The contribution of Victor Hugo to the liberation, emancipation, and changing perceptions of women in 19th century French society

The over-riding perceptions of Victor Hugo’s attitudes towards women are intensely coloured by his deep-seated Romanticism and his well-testified, stifling and over-bearing treatment of women in his personal life. As such, Hugo’s contribution to the feminist struggle of his time has been woefully overlooked in the larger scheme of his social and political activism. Through a close examination of his largely unstudied public discourse on women’s rights, this thesis situates Hugo’s feminist views firmly in the context of Enlightenment feminism and 19th century feminism, while also drawing heavily on the illuminating principles of Enlightenment feminism. In particular, this thesis examines Hugo’s support for several of the most determining issues of 19th century French feminism, including women’s right to education, equal citizenship, universal suffrage rights, and the issue of regulated prostitution. Further, by examining the way in which Hugo’s views on women’s maternal role extended far beyond the limited vision of domesticity bolstered by the ideology of ‘republican motherhood’, this thesis engages in a re-appraisal of Hugo’s literary representation of maternity which identifies the maternal as a universal quality of devotion and self-sacrifice to which all humankind must aspire for the creation of a just, egalitarian, and democratic society. Though at times inevitably constrained by his Romanticism, this thesis demonstrates the extent to which Hugo’s feminism is grounded in his wider vision of social emancipation and is underpinned by a profound empathy, compassion, and moral conscience – qualities which are just as fundamental today, as they were for Hugo when participating in the fitful, though decisive, feminist struggle in 19th century France.

Reconfiguring the contours of statehood and the rights of the peoples of disappearing states

Many of the elements that have traditionally supported state level normative self-organization, most notably territory, are being actively undermined by rising sea levels, flooding, desertification, amongst other climate change effects. As more and more states come to be redefined as â disappearingâ , that is, states losing their territories to the natural environment through no specific fault of their own, a question arises as to how displaced communities will be assisted in their desire (and right) to continue to practice principles of self-determination and self-government? What is clear is that the international community can no longer continue with the fiction of a unified or unchanging model of the liberal democratic state. Instead, alternative ontological models of sovereign community are required, as is a re-imagining of how statehood might be re-constituted in the future in response to deepening ecological problems. The international community must now begin to address the immanent nature of threats posed to disappearing states and consider how a model of statehood that does not privilege territory as a fixed component of state identity could be operationalized. This paper considers how a democratic reform of statehood might proceed and resettlement agreements for displaced communities determined. The transition to an era of peaceful sovereign relations under deteriorating global climate conditions and growing natural resource scarcity, it argues, will require a significant extension of established traditions of democratic compromise, human rights solidarity and cosmopolitan justice.

Nutrient availability affects the response of the calcifying chlorophyte Halimeda opuntia (L.) J.V. Lamouroux to low pH

Atmospheric carbon dioxide emissions cause a decrease in the pH and aragonite saturation state of surface ocean water. As a result, calcifying organisms are expected to suffer under future ocean conditions, but their physiological responses may depend on their nutrient status. Because many coral reefs experience high inorganic nutrient loads or seasonal changes in nutrient availability, reef organisms in localized areas will have to cope with elevated carbon dioxide and changes in inorganic nutrients. Halimeda opuntia is a dominant calcifying primary producer on coral reefs that contributes to coral reef accretion. Therefore, we investigated the carbon and nutrient balance of H. opuntia exposed to elevated carbon dioxide and inorganic nutrients. We measured tissue nitrogen, phosphorus and carbon content as well as the activity of enzymes involved in inorganic carbon uptake and nitrogen assimilation (external carbonic anhydrase and nitrate reductase, respectively). Inorganic carbon content was lower in algae exposed to high CO2, but calcification rates were not significantly affected by CO2 or inorganic nutrients. Organic carbon was positively correlated to external carbonic anhydrase activity, while inorganic carbon showed the opposite correlation. Carbon dioxide had a significant effect on tissue nitrogen and organic carbon content, while inorganic nutrients affected tissue phosphorus and N:P ratios. Nitrate reductase activity was highest in algae grown under elevated CO2 and inorganic nutrient conditions and lowest when phosphate was limiting. In general, we found that enzymatic responses were strongly influenced by nutrient availability, indicating its important role in dictating the local responses of the calcifying primary producer H. opuntia to ocean acidification.

Investigation of escape response of Norwegian Pecten maximus

The ongoing process of ocean acidification already affects marine life and, according to the concept of oxygen- and capacity limitation of thermal tolerance (OCLTT), these effects may be exacerbated at the boarders of the thermal tolerance window. We studied the effects of elevated CO2 concentrations on clapping performance and energy metabolism of the commercially important scallop Pecten maximus. Individuals were exposed for at least 30 days to 4°C (winter) or to 10°C (spring/summer) at either ambient (0.04 kPa, normocapnia) or predicted future PCO2 levels (0.11 kPa, hypercapnia). Cold (4°C) exposed groups revealed thermal stress exacerbated by PCO2 indicated by a high mortality overall and its increase from 55% under normocapnia to 90% under hypercapnia. We therefore excluded the 4°C groups from further experimentation. Scallops at 10°C showed impaired clapping performance following hypercapnic exposure. Force production was significantly reduced although the number of claps was unchanged between normo- and hypercapnia exposed scallops. The difference between maximal and resting metabolic rate (aerobic scope) of the hypercapnic scallops was significantly reduced compared to normocapnic animals, indicating a reduction in net aerobic scope. Our data confirm that ocean acidification narrows the thermal tolerance range of scallops resulting in elevated vulnerability to temperature extremes and impairs the animal's performance capacity with potentially detrimental consequences for its fitness and survival in the ocean of tomorrow.

Time series of seawater carbonate chemistry calculated throughout incubation periods of Boreogadus saida and Gadus morhua during exposure to different CO2 and temperature conditions

Oceans are experiencing increasing acidification in parallel to a distinct warming trend in consequence of ongoing climate change. Rising seawater temperatures are mediating a northward shift in distribution of Atlantic cod (Gadus morhua), into the habitat of polar cod (Boreogadus saida), that is associated with retreating cold water masses. This study investigates the competitive strength of the co-occurring gadoids under ocean acidification and warming (OAW) scenarios. Therefore, we incubated specimens of both species in individual tanks for 4 months, under different control and projected temperatures (polar cod: 0, 3, 6, 8 °C, Atlantic cod: 3, 8, 12, 16 °C) and PCO2 conditions (390 and 1170 µatm) and monitored growth, feed consumption and standard metabolic rate. Our results revealed distinct temperature effects on both species. While hypercapnia by itself had no effect, combined drivers caused nonsignificant trends. The feed conversion efficiency of normocapnic polar cod was highest at 0 °C, while optimum growth performance was attained at 6 °C; the long-term upper thermal tolerance limit was reached at 8 °C. OAW caused only slight impairments in growth performance. Under normocapnic conditions, Atlantic cod consumed progressively increasing amounts of feed than individuals under hypercapnia despite maintaining similar growth rates during warming. The low feed conversion efficiency at 3 °C may relate to the lower thermal limit of Atlantic cod. In conclusion, Atlantic cod displayed increased performance in the warming Arctic such that the competitive strength of polar cod is expected to decrease under future OAW conditions.

Children’s access to beneficial information in Arab states: Implementation of Article 17 of the Convention on the Rights of the Child in Egypt, Morocco and the United Arab Emirates

In theory, the multiple platforms and transnational nature of digital media, along with a related proliferation of diverse forms of content, make it easier for children’s right to access socially and culturally beneficial information and material to be realised, as required by Article 17 of the UN Convention on the Rights of the Child (CRC). Drawing on data collected during research on children’s screen content in the Arab world, combined with scrutiny of documents collated by the Committee on the Rights of the Child, which monitors compliance with the CRC, this paper explores how three Arab countries, Egypt, Morocco and the United Arab Emirates, presented their efforts to implement Article 17 as part of their periodic reporting on their overall performance in putting the CRC into effect. It uncovers tensions over the relationship between provision, participation and protection in relation to media, reveals that Article 17 is liable to get less attention than it deserves in contexts where governments keep a tight grip on media, and that, by appearing to give it a lower priority, all parties neglect the intersection between human rights in relation to media and children’s rights.

Effect of reading sport chronicles on the perception of justice and the predisposition to protest actions in soccer

In this study three chronicles from national newspapers (one generalist and two sport press) were analyzed. The chronicles belong to Spain’s soccer final of the King’s Cup in 2014. The aim of the study was to know if there was any influence on the readers’ perception of justice and consequently if this influence could cause a particular predisposition to participate in acts of protest. 462 university students participated. The results showed that different chronicles caused differences in the perception of justice depending on the chronicle read. However, a clear influence on the willingness to participate in acts of protest was not obtained. These results should make us think about the impact of sport press and its influence, and to be aware of the indirect responsibility of every sector on the antisocial behaviors generated by soccer in our country.

Law and Original Contract in the Republican Thought of Immanuel Kant

This article discusses the concept of right and its identification with the power to coerce, to show a reciprocity between the original contract and the right, as a manifestation of the reciprocity between moral law and freedom, as Kant states in its Second Critique. The demonstration of this view will allow a republican stance evident in the legal and political thought of Kant, since the right of a people can only exist while the town itself is unified to enact.

Digitizing dissent: cyborg politics and fluid networks in contemporary Cuban activism

Communication technologies shape how political activist networks are produced and maintain themselves. In Cuba, despite ideologically and physically oppressive practices by the state, a severe lack of Internet access, and extensive government surveillance, a small network of bloggers and cyberactivists has achieved international visibility and recognition for its critiques of the Cuban government. This qualitative study examines the blogger collective known as Voces Cubanas in Havana, Cuba in 2012, advancing a new approach to the study of transnational activism and the role of technology in the construction of political narrative. Voces Cubanas is analyzed as a network of connections between human and non-human actors that produces and sustains powerful political alliances. Voces Cubanas and its allies work collectively to co-produce contentious political discourses, confronting the dominant ideologies and knowledges produced by the Cuban state. Transnational alliances, the act of translation, and a host of unexpected and improvised technologies play central roles in the production of these narratives, indicating new breed of cyborg sociopolitical action reliant upon fluid and flexible networks and the act of writing. 

The U.N. convention on the rights of the child: Relevance and application to pediatric clinical bioethics

This article provides an overview of the relevance and import of the U.N. Convention on the Rights of the Child (CRC) to child health practice and pediatric bioethics. We discuss the four general principles of the CRC that apply to the implementation of all rights contained in the document, the right to health articulated in Article 24, and the important position ascribed to parents in fulfilling the rights of their children. We then examine how the CRC is implemented and monitored in law and practice. The CRC and associated principles of child rights provide strategies for rights-based approaches to clinical practice and health systems, as well as to policy design, professional training, and health services research. In light of the relevance of the CRC and principles of child rights to children’s health and child health practice, it follows that there is an intersection between child rights and pediatric bioethics. Pediatric bioethicists and child rights advocates should work together to define this intersection in all domains of pediatric practice.