64 research outputs found
Arctic seabirds and shrinking sea ice: egg analyses reveal the importance of ice-derived resources
In the Arctic, sea-ice plays a central role in the functioning of marine food webs and its rapid shrinking has large effects on the biota. It is thus crucial to assess the importance of sea-ice and ice-derived resources to Arctic marine species. Here, we used a multi-biomarker approach combining Highly Branched Isoprenoids (HBIs) with ÎŽ13C and ÎŽ15N to evaluate how much Arctic seabirds rely on sea-ice derived resources during the pre-laying period, and if changes in sea-ice extent and duration affect their investment in reproduction. Eg
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Extending critical performativity
In this article we extend the debate about critical performativity. We begin by outlining the basic tenets of critical performativity and how this has been applied in the study of management and organization. We then address recent critiques of critical performance. We note these arguments suffer from an undue focus on intra-academic debates; engage in author-itarian theoretical policing; feign relevance through symbolic radicalism; and repackage common sense. We take these critiques as an opportunity to offer an extended model of critical performativity that involves focusing on issues of public importance; engaging with non-academic groups using dialectical reasoning; scaling up insights through movement building; and propagating deliberation
The political import of deconstructionâDerridaâs limits?: a forum on Jacques Derridaâs specters of Marx after 25 Years, part I
Jacques Derrida delivered the basis of The Specters of Marx: The State of the Debt, the Work of Mourning, & the New International as a plenary address at the conference âWhither Marxism?â hosted by the University of California, Riverside, in 1993. The longer book version was published in French the same year and appeared in English and Portuguese the following year. In the decade after the publication of Specters, Derridaâs analyses provoked a large critical literature and invited both consternation and celebration by figures such as Antonio Negri, Wendy Brown and Frederic Jameson. This forum seeks to stimulate new reflections on Derrida, deconstruction and Specters of Marx by considering how the futures past announced by the book have fared after an eventful quarter century. Maja Zehfuss, Antonio VĂĄzquez-Arroyo and Dan Bulley and Bal Sokhi-Bulley offer sharp, occasionally exasperated, meditations on the political import of deconstruction and the limits of Derridaâs diagnoses in Specters of Marx but also identify possible paths forward for a global politics taking inspiration in Derridaâs work of the 1990s
Silica bodies and their systematic implications at the subfamily level in Podostemaceae
Position syst\ue9matique, \ue9tude morphologique et palynologique du genre Berenice
Volume: 15Start Page: 139End Page: 14
LIGHT AND ELECTRON MICROSCOPY OF THE RESIN GLANDS OF PASSIFLORA FOETIDA (PASSIFLORACEAE)
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