Ecologists are challenged by the need to bridge and synthesize different approaches and theories to obtain a coherent understanding of ecosystems in a changing world. Both food web theory and regime shift theory shine light on mechanisms that confer stability to ecosystems, but from different angles. Empirical food web models are developed to analyze how equilibria in real multi-trophic ecosystems are shaped by species interactions, and often include linear functional response terms for simple estimation of interaction strengths from observations. Models (...) of regime shifts focus on qualitative changes of equilibrium points in a slowly changing environment, and typically include non-linear functional response terms. Currently, it is unclear how the stability of an empirical food web model, expressed as the rate of system recovery after a small perturbation, relates to the vulnerability of the ecosystem to collapse. Here, we conduct structural sensitivity analyses of classical consumer-resource models in equilibrium along an environmental gradient. Specifically, we change non-proportional interaction terms into proportional ones, while maintaining the equilibrium biomass densities and material flux rates, to analyze how alternative model formulations shape the stability properties of the equilibria. The results reveal no consistent relationship between the stability of the original models and the proportionalized versions, even though they describe the same biomass values and material flows. We use these findings to critically discuss whether stability analysis of observed equilibria by empirical food web models can provide insight into regime shift dynamics, and highlight the challenge of bridging alternative modelling approaches in ecology and beyond. (shrink)

This article revisits the manuscript tradition and the different redactions of John Buridan’s commentaries on Aristotle’s Physics. The aim of the article is threefold. First, it makes some corrections to the lists of manuscripts containing the third redaction and the final redaction of Buridan’s questions commentary on the Physics. Second, it argues that manuscript Zaragoza, Biblioteca Capitular de la Seo, cod. 15-61, ff. 1r-62v, contains a previously unknown version of the final redaction (together with the standard version from f. 62v (...) onwards). Third, to facilitate further study of the manuscripts of Buridan’s questions on the Physics and their mutual relations, appendices at the end of the article provide detailed tables of contents for the third redaction and the final redaction, as well as editions of selected questions from the Zaragoza manuscript, the third redaction of Buridan’s questions on the Physics, and the so-called Quaestiones breves. (shrink)

When the first volume of the Oxyrhynchus Papyri was published in 1898, all lovers of Sappho must have been disappointed with the latter half of Blass's otherwise excellent restoration of this poem. The perusal of a recent article by J. Sitzler, in which later suggestions are discussed and fresh ones made, only serves to confirm this feeling of dissatisfaction. Sappho's extant work elsewhere combines a dignified simplicity of matter with a dignified simplicity of form. Any obscurity we find in it, (...) is due rather to our ignorance of her dialect than to any real strangeness of thought or diction. By simple ideas, simple constructions, simple words, she produces a beauty all her own. It must be confessed that the latter half of the Ode to the Nereids, as it stands in any of the published restorations falls short of all else of Sappho's that we possess. It is just possible that in line II xs22EFτοισι can stand as a feminine, but, grammar apart, nothing, surely, could be tamer than the sentence as it stands with the long relative clause beginning in line 13—‘When he heard the reproach, which used to cut him to the quick and restrain him amid the mirth of his fellow citizens, and which died away for a time only to be revived soon after.’ I hope to bring the poem a stage nearer satisfactory restoration by showing that there are grounds for rejecting some at least of the suggestions which contribute to this result. (shrink)

Arguably, the most promising and compelling route to demonstrating the significance of Hegel’s thought to contemporary philosophy has been the series of recent readings that construe Hegel as continuing and completing Kant’s Copernican turn. Paul Redding explicitly locates his interpretation within this program, seeing the hermeneutic dimension of Hegel’s thought as providing for the possibility of continuing the Kantian project. Kant’s Copernican turn can be loosely stated as the procedure of reflectively uncovering unexperienced conditions of experience that contribute to the (...) nature of experience in ways that require its further re-determination and re-description. What a hemeneutic take on this reflective procedure adds is that foremost among those conditions are contexts of intersubjective or dialogical relations—structures of recognition. While perhaps disappointing to anyone interested in the problem of textual interpretation, there is finally nothing more to Redding’s account of Hegel’s “hermeneutics” than the establishing of recognitive structures as forming the ultimate horizon of human experience. I take Redding’s relentless tracking of the problem of recognition to be one of his book’s virtues. (shrink)

The first professors at the newly-established London University were appointed in 1827, but a chair in geology was not created there until 1841. In the intervening years, teaching in geology and palaeontology was included in other natural science courses. Early in 1831, John Phillips, keeper of the Yorkshire Museum at York, was prompted to give a formal course of geological lectures and subsequently he was informally offered the professorship, which he declined.

Many people take for granted an absolute conception of property rights. According to this conception, if I own a piece of property I have a moral right to do with it as I please, irrespective of the needs of others.This paper articulates an argument against this conception of property rights. First, it shows that there are many possible conceptions of property rights, and that there are significant differences among the models of ownership which have prevailed in different societies. Then, it (...) argues that there are decisive grounds to refuse to grant that property owners have a moral right to exercise absolute control over their property, and that ownership implies not only rights but also duties and limits. (shrink)

In the following pages the references are to the lines of Immisch's text , and the MSS and groups of MSS are indicated by his lettering.

VOL. i, Reitz 88, Indicium Vocalium 5. The so called ñμίÞωνα are given as ίΧνΡΑ Σ Σ and if by Dionysius Hal. Comp. 14.

Seiler ‘ caute et anxie circumeuntem,’ Hirschig ‘ caute circumeuntem.’ Tense as well as context point to ‘ bestriding.’ See L. and S. under S000983880001939X_inline2.

In these days no edition of a classic, least of all of a ‘new’ classic, can claim to be final; and since the able editor of the Cambridge Herodas has found reason to reconsider some of his readings, there is clearly room for an independent examination of the text. This paper embodies the result of several weeks' close study of the papyrus in 1923 and 1924. To save space I have begun a note with a new line only where it (...) is of more than usual interest. By the use of a letter of thicker type I mean that there are traces consistent with that letter, but not necessarily with that alone—which seems to me the only way by which Herodas can be saved from the restorer who regards doubtful letter-traces as equivalent to a gap. I begin with three passages which seem to me to stand in a class apart. (shrink)