Reduction in Ecology

شهد قطاع التعليم المغربي عدة تغييرات شملت مجالات متنوعة إن على مستوى المنهاج أو إصلاح الفضاءات التعليمية أو تكوين المدرسين. ولعل مردّ ذلك هو الانفجار المعرفيّ المتزايد، والمكانة المتميّزة للتّربية والتّعليم، واهتمامات الدولة التي أصبحت مركزة على الظواهر المدرسية وفي علاقتها بتغيير المجتمع وارتباطها بالأسرة والمحيط، وتأثرها بالمرجعية الثقافية والدينية، وتفاعلها مع الظروف السياسية والاقتصادية انطلاقا من التيمات الكبرى التي أُنتِجت حول المدرسة من قبيل تصرفات المتعلم وسلوكياته داخل المدرسة، وعلاقات المدرسة بالآباء، وظاهرة العنف، والهدر المدرسي، ودراسة العلاقات التربوية، والأدوار (...) التربوية، والجماعات التربوية. وتأسيسا على ذلك، أصبح الاهتمام بالتّربية والتّعليم من الأولويات في المملكة المغربية، كما انصب الاهتمام بالمدرسة والتنشئة الاجتماعية، و تم التركيز على دراسة الأنظمة التربوية والظواهر المدرسية ودورها في تغيير المجتمع من خلال علاقتها مع الأسرة والمحيط، وتأثرها بالمرجعية الثقافية والدينية، وتفاعلها مع الظروف السياسية والاقتصادية إذ أُضيفت إلى المدرسة رسائل جديدة ومهمّات متجدّدة؛ لضمان المتعة الثّقافيّة والحضاريّة والمعرفيّة والقيميّة في عالم أضحى يعيش على إيقاع مفاهيم جديدة ليس أقلّها شأنا... مفهوم المواطنة الكونيّة أو العالميّة. و أضحت وظائفها تلامس مختلف جوانب الإنسان لتأهيله وجعله ذلك الكائن الذي يعرف ذاته أولا ثم يكتشف الآخر ثانيا. وإذا ما نظرنا إلى هذه الوظائف نجدها متعددة، نظرا لتعدد أغراض وأهداف الإنسان، فمنها ما هو تربوي وتعليمي ثم إداري، واجتماعي وأمني، وتكويني، ومنها ما هو إيديولوجي، وإرشادي وتوجيهي، وتواصلي، واقتصادي... وبذلك تؤثر على سلوك الأفراد تأثيرا منظما. والمدرسة من حيث هي كذلك، وباعتبارها الوجه الحقيقي للنظام التربوي ككل، تنصب وظيفتها الرئيسة على سلوك الناشئة، ويقاس مدى تحقيقها لوظائفها بمدى التغيير الذي تنجح في تحقيقه في سلوك أبنائها ومن ثم كان ضروريا أن ينظر إليها نظرة شمولية كنظرتنا نحو المجتمع برمته، وأن تكون في مقدمة وطليعة كل سياسة إصلاحية للمجتمع، وأن ينظر إليها كمرجعية لكل تغيير أو تغير قد تعرفه باقي القطاعات والجوانب الأخرى لحياة الفرد لأنها تستهدف تأهيله والرفع من قدرة فاعليته، بما يتوافق مع التغيرات والتطورات على المستويين المحلي والإقليمي والخارجي. فلا يمكن الحديث عن نظام تربوي ناجح في المستقبل، ما لم يتم استحضار التطور الحاصل في أدوار ووظائف وآليات اشتغال المدرسة، من خلال التعرف على سيرورات التحولات التي عرفتها المؤسسة التعليمية في الماضي والحاضر. (shrink)

Understanding community-level selection using Lewontin’s criteria requires both community-level inheritance and community-level heritability, and in the discipline of community and ecosystem genetics, these are often conflated. While there are existing studies that show the possibility of both, these studies impose community-level inheritance as a product of the experimental design. For this reason, these experiments provide only weak support for the existence of community-level selection in nature. By contrast, treating communities as interactors (in line with Hull’s replicator-interactor framework or Dawkins’s idea (...) of the “extended phenotype”) provides a more plausible and empirically supportable model for the role of ecological communities in the evolutionary process. (shrink)

New mechanistic philosophy has not examined explanations in ecology although they are based extensively on describing mechanisms responsible for phenomena under scrutiny. This chapter uses the example of research on the shrub Lonicera maackii (Amur honeysuckle) to scrutinize individual-level mechanisms that are generally accepted and used in ecology and confronts them with the minimal account of mechanisms. Individual-level mechanisms are for a phenomenon, are hierarchical, and absent entities play a role in their functioning. They are distinguished by the role played (...) by properties in determining activities and organization. The chapter also considers the experimental methods for discovery of individual-level mechanisms, the possibility of group-level mechanisms in ecology, and suggests further research problems. (shrink)

Considerable variation exists not only in the kinds of transposable elements (TEs) occurring within the genomes of different species, but also in their abundance and distribution. Noting a similarity to the assortment of organisms among ecosystems, some researchers have called for an ecological approach to the study of transposon dynamics. However, there are several ways to adopt such an approach, and it is sometimes unclear what an ecological perspective will add to the existing co-evolutionary framework for explaining transposon-host interactions. This (...) review aims to clarify the conceptual foundations of transposon ecology in order to evaluate its explanatory prospects. We begin by identifying three unanswered questions regarding the abundance and distribution of TEs that potentially call for an ecological explanation. We then offer an operational distinction between evolutionary and ecological approaches to these questions. By determining the amount of variance in transposon abundance and distribution that is explained by ecological and evolutionary factors, respectively, it is possible empirically to assess the prospects for each of these explanatory frameworks. To illustrate how this methodology applies to a concrete example, we analyzed whole-genome data for one set of distantly related mammals and another more closely related group of arthropods. Our expectation was that ecological factors are most informative for explaining differences among individual TE lineages, rather than TE families, and for explaining their distribution among closely related as opposed to distantly related host genomes. We found that, in these data sets, ecological factors do in fact explain most of the variation in TE abundance and distribution among TE lineages across less distantly related host organisms. Evolutionary factors were not significant at these levels. However, the explanatory roles of evolution and ecology become inverted at the level of TE families or among more distantly related genomes. Not only does this example demonstrate the utility of our distinction between ecological and evolutionary perspectives, it further suggests an appropriate explanatory domain for the burgeoning discipline of transposon ecology. The fact that ecological processes appear to be impacting TE lineages over relatively short time scales further raises the possibility that transposons might serve as useful model systems for testing more general hypotheses in ecology. (shrink)

The concept of hierarchical organization is commonplace in science. Subatomic particles compose atoms, which compose molecules; cells compose tissues, which compose organs, which compose organisms; etc. Hierarchical organization is particularly prominent in ecology, a field of research explicitly arranged around levels of ecological organization. The concept of levels of organization is also central to a variety of debates in philosophy of science. Yet many difficulties plague the concept of discrete hierarchical levels. In this paper, we show how these difficulties undermine (...) various implications ascribed to hierarchical organization, and we suggest the concept of scale as a promising alternative to levels. Investigating causal processes at different scales offers a way to retain a notion of quasi-levels that avoids the difficulties inherent in the classic concept of hierarchical levels of organization. Throughout, our focus is on ecology, but the results generalize to other invocations of hierarchy in science and philosophy of science. (shrink)

The classical holism-reductionism debate, which has been of major importance to the development of ecological theory and methodology, is an epistemological patchwork. At any moment, there is a risk of it slipping into an incoherent, chaotic Tower of Babel. Yet philosophy, like the sciences, requires that words and their correlative concepts be used rigorously and univocally. The prevalent use of everyday language in the holism-reductionism issue may give a false impression regarding its underlying clarity and coherence. In reality, the conceptual (...) categories underlying the debate have yet to be accurately defined and consistently used. There is a need to map out a clear conceptual, logical and epistemological framework. To this end, we propose a minimalist epistemological foundation. The issue is easier to grasp if we keep in mind that holism generally represents the ontological background of emergentism, but does not necessarily coincide with it. We therefore speak in very loose terms of the “holism-reductionism” debate, although it would really be better characterised by the terms emergentism and reductionism. The confrontation between these antagonistic paradigms unfolds at various semantic and operational levels. In definitional terms, there is not just emergentism and reductionism, but various kinds of emergentisms and reductionisms. (shrink)

Considers that in ecosystem, landscape and global ecology, an energetics reading of ecological systems is an expression of a cybernetic, systemic and holistic approach. In ecosystem ecology, the Odumian paradigm emphasizes the concept of emergence, but it has not been accompanied by the creation of a method that fully respects the complexity of the objects studied. In landscape ecology, although the emergentist, multi-level, triadic methodology of J.K. Feibleman and D.T. Campbell has gained acceptance, the importance of emergent properties is still (...) undervalued. In global ecology, the Gaia hypothesis is an expression of an organicist metaphor, while the emergentist terminology used is incongruent with the underlying physicalist cybernetics. More generally, an analytico-additional methodology and the reduction of the properties of ecosystems to the laws of physical chemistry render purely formal any assertion about the emergentist and holistic nature of the ecological systems studied. (shrink)

The holism-reductionism debate, one of the classic subjects of study in the philosopy of science, is currently at the heart of epistemological concerns in ecology. Yet the division between holism and reductionism does not always stand out clearly in this field. In particular, almost all work in ecosystem ecology and landscape ecology presents itself as holistic and emergentist. Nonetheless, the operational approaches used rely on conventional reductionist methodology.From an emergentist epistemological perspective, a set of general 'transactional' principles inspired by the (...) work of J. Dewey and J.K. Feibleman are proposed in an effort to develop a coherent ontological and methodological semantics. (shrink)

The contrast between the strategies of research employed in reductionism and holism masks a radical contradiction between two different scientific philosophies. We concentrate in particular on an analysis of the key philosophical issues which give structure to holistic thought. A first (non-exhaustive) analysis of the philosophical tradition will dwell upon: a) the theory of emergence: each level of organisation is characterised by properties whose laws cannot be deduced from the laws of the inferior levels of organisation (Engels, Morgan); b) clarification (...) of the relations between the “whole” and the “parts” (Woodger, Needham); c) the ontological or epistemological nature of the emergent properties; are they a phenomenological reality or solely an artefact of the state of our knowledge? (Pepper, Henle, Hempel and Oppenheim); d) the proposition of the holistic theoretical and methodological model ( Novikoff, Feibleman). I then go on to examine the differences that exist between the reductionist and the holistic approaches at various levels of analysis: that is to say, the differences which affect their ontologies, methodologies and epistemologies respectively. I attempt to understand the spirit of a holistic approach to ecology by analyzing the major work of E.P. Odum Fundamentals of ecology (1953, 1959, 1971). I set forward what might be meant by the “holistic approach”, which is implicated in all the different levels of organisation at which the problem of “complexity” is debated. Ecology presents itself as an “holistic science” and Odum’s book offers a vision of the world which dates far back in the history of philosophy. By looking at the three different editions of this fundamental text on ecology, we may become aware of the evolution of Odum’s thought. In fact, only in the third and last edition is there a conscious appropriation of the holistic approach (by using the theoretical models of Feibleman who, for his part, refers to Novikoff). However, even when formally referring to the theory of emergence (that is to say the ontological nucleus of every holistic approach), Odum’s systemic analysis presents the same logical errors, which push him back into the reductionist domain. Above all, in his examination of the main concepts of “population”, “community” and “ecosystem”, there is a misunderstanding of the profound difference between “collective properties” and “emergent properties”. Moreover, the cybernetic models of Odum’s systemic analysis (introduced into ecology by Margalef), allowed him to vastly oversimplify his methodological task: in fact, neither how many levels nor which levels of organization are fundamental for the study of each individual level is clearly marked. Finally, Odum analyses the ecosystem as composed of energetic flux and cycles of matter, referring to the trophic-dynamic vision of Lindeman. That is to say, in my opinion, he juxtaposes a reductionistic methodology and epistemology to an holistic ontology. (shrink)