Online research in philosophy

From the earliest photographic attempts to represent tropical hybrid races to depictions of disease in new tropical medicines, Picturing Tropical Nature offers ...

The greatest diversity of butterflies and their host plants occurs in tropical regions. Some groups of butterflies in the tropics exhibit monophagous feeding in the larval stage, exploiting only one family of plants; others are polyphagous, feeding on plants in two or more distinct families. The two major types of tropical habitats for butterflies, namely primary and secondary forests, offer very different evolutionary opportunities for the exploitation of plants as larval food. Butterflies are faced with the major logistical problem, (...) as are many other herbivorous insects, of depositing eggs on the correct plant for successful larval feeding. This paper, using the concepts of phenotype set and spatial patchiness of resources, attemps to make some predictions as to the optimal phenotypic systems for monophagous and polyphagous feeding in tropical butterflies, as related to the spatial patchiness of larval host plants in primary and secondary forests. In addition to the secondary compound chemistry of larval host plants as playing a role in the evolution of monophagy and polyphagy, the assumption is made that the spatial patchiness of host plants within and among different families also acts as a major factor in determining optimal ranges of phenotypes for different patterns of larval feeding. Owing to the high spatial patchiness of primary forest species of canopy trees and vines, it is predicted that butterflies exploiting these will be mostly polyphagous, whereas secondary forests having stable formations of fewer plant species and larger patches of these plants, will have mostly monophagous species. Forest understories may have both monophagous and polyphagous species, depending upon the layer of forest and the general type of understory (i.e. palmaceous or dicotyledonous). Field data on some groups of butterflies from tropical America support these predictions. Polyphagous butterflies are predicted to possess a genetic system of mixed morphs with a population being polymorphic as a whole; monophagous butterflies are predicted to have individuals all more or less similar genetically, and with a high amount of genic variation within individuals. Other forms of monophagy may evolve in species that are essentially monomorphic but with various mechanisms (physiological, developmental, behavioral) of phenotypic flexibility at the individual level. Although the environment is essentially coarse-grained for larvae since most are sedentary and polymorphism is an optimal adaptive strategy, the oviposition strategy of the adult must also be considered and some situations (i.e. forest canopy) have resources (host plants) distributed in a fine-grained fashion. Other forms of limited polyphagy may result from monomorphic genetic systems in which there is considerable phenotypic flexibility. (shrink)

Scholars and environmentalists in the industrialized nations have repeatedly deplored the destruction of tropical forests as a byproduct of economic development. Their position is based upon scientific, economic, and ethical arguments. Proponents of economic development from the tropical nations recognize that its immediate benefits are enjoyed by their own relatively poor populations while the benefits of habitat preservation are enjoyed by the world as a whole. So far, few institutional mechanisms have been developed that can reconcile the competing perspectives. In (...) addition to reviewing the arguments in favor of and against habitat preservation, this paper proposes some innovative institutions that can both satisfy developmental aspirations and account for the global benefits of habitat preservation. (shrink)

TEST is a novel taxonomy of knowledge representations based on three distinct hierarchically organized representational features: Tropism, Embodiment, and Situatedness. Tropic representational features reflect constraints of the physical world on the agent's ability to form, reactivate, and enrich embodied (i.e., resulting from the agent's bodily constraints) conceptual representations embedded in situated contexts. The proposed hierarchy entails that representations can, in principle, have tropic features without necessarily having situated and/or embodied features. On the other hand, representations that are situated and/or embodied (...) are likely to be simultaneously tropic. Hence, although we propose tropism as the most general term, the hierarchical relationship between embodiment and situatedness is more on a par, such that the dominance of one component over the other relies on the distinction between offline storage versus online generation as well as on representation-specific properties. (shrink)

Almost everyone in the developed world wants the logging of tropical rain forests to stop. Like Antarctica, they are said to be much too important and much too valuable to be utilized just for development and are said to be part of a global heritage. However, it is not that simple. People in the developing world consider our criticisms to be ill-informed, patronizing, and self-serving. We are seen as having “dirty hands.” They hold that we neither have nor deserve moral (...) standing as critics until we change our trade policies, rhetoric, and extravagant lifestyles. (shrink)

Almost everyone in the developed world wants the logging of tropical rain forests to stop. Like Antarctica, they are said to be much too important and much too valuable to be utilized just for development and are said to be part of a global heritage. However, it is not that simple. People in the developing world consider our criticisms to be ill-informed, patronizing, and self-serving. We are seen as having “dirty hands.” They hold that we neither have nor deserve moral (...) standing as critics until we change our trade policies, rhetoric, and extravagant lifestyles. (shrink)

In this paper, we analyze the behavior of Dutch tropical timber investment funds in relation to financial regulation. These funds are a niche market within the market for socially responsible investments. During the past few years, several Dutch timber funds went bankrupt, whereas others were surrounded by scandals. Partly as a reaction to this, tighter regulation was developed and implemented. In response to the regulatory changes timber funds adjusted their operations and business strategy. The lack of supervision of timber funds, (...) the subsequent tightening of the regulation and the strategic responses of the timber funds fits into the ‘regulatory dialectic’ as described by Edward Kane. Moreover, we can use Akerlof’s concept of informational asymmetries to explain the underlying cause of the regulatory dialectic. The key problem with the Dutch timber funds is that there is no financial supervision with respect to the liquidity and the solvency of the timber funds. Consequently, investors are unable to verify the claims made by the timber funds, which causes major information asymmetries between the two parties. Our case study demonstrates how a lack of regulation can spoil a market that in itself has the potential to offer something useful to society. (shrink)

This volume provides a comprehensive presentation of the philosophical work of the fifteenth-century Renaissance thinker Giovanni Pico della Mirandola. In essays specially commissioned for this book, a distinguished group of scholars presents the central tropics and texts of Pico’s literary output. Best known as the author of the celebrated “Oration on the Dignity of Man,” a magnificent speech originally intended to introduce a debate of 900 theses to be held in Rome before the Pope, the College of Cardinals, and (...) an international group of scholars, Pico also wrote several other prominent works. (shrink)

In this paper, I defend the view that the values of concrete objects and persons are reducible to the final values of tropes. This reductive account has recently been discussed and rejected by Rabinowicz and Rønnow-Rasmussen (2003). I begin by explaining why the reduction is appealing in the first place. In my rejoinder to Rabinowicz and Rønnow-Rasmussen I defend trope-value reductionism against three challenges. I focus mainly on their central objection, that holds that the reduction is untenable since different evaluative (...) attitudes have, ontologically speaking, different objects. I grant that this may well be so, but argue that the objection is based on an unwarranted, loose reading of the notion 'value for its own sake'. On the more reasonable strict reading, it is plausible to maintain that tropes are the sole ontological category that can properly be ascribed final value. (shrink)

Computer simulations may allow us to understand the earth’s fickle climate and how it is affected by detours of the great ocean currents. These detours cause abrupt coolings -- the average global temperature can drop dramatically in just a few years, with droughts that set up El-Niño-like forest fires even in the tropics. While volcanic eruptions and Antarctic ice shelf collapses can also abruptly cool things, what we’re talking about here is a flip-flop: a few centuries later, there’s an (...) equally abrupt rewarming. This cycle has repeated every few thousand years (though it has been 12,000 years since the most recent one). (shrink)

The authors of this paper earlier argued that concrete objects, such as things or persons, may have final value (value for their own sake), which is not reducible to the value of states of affairs that concern the object in question. Our arguments have been challenged. This paper is an attempt to respond to some of these challenges, viz. those that concern the reducibility issue. The discussion pre-supposes a Brentano-inspired account of value in terms of fitting responses to value bearers. (...) Attention is given to a yet another type of reduction proposal, according to which the ultimate bearers of final value are abstract particulars (so-called tropes) rather than abstract states or facts. While the proposal is attractive (if one entertains the existence of tropes), it confronts serious difficulties. To recognise tropes as potential bearers of final value, along with other objects, is one thing; but to reduce the final value of concrete objects to the final value of tropes is another matter. (shrink)

Drawing heavily upon natural history data from the Neotropical butterfly fauna, an attempt is made to develop a model, with testable hypotheses, to account for the evolution of egg-clustering and larval gregariousness. Given the high diversity of both plant and butterfly species in the American tropics, there is a higher incidence of egg-clustering there, including some species with aposematically-colored immature stages. Emphasis is placed on the need to examine both the physical (mechanical) toughness of larval food plants for larval (...) feeding success, and the spatial structuring of food plant populations. It is argued that when food plant spatial patchiness is high, the breadth of local food plant species usage low, plant growth rates high, fed-upon structures tough, butterfly dispersal low, and reproductive potential low, egg-clustering evolves. Such ecological character states, coupled with the occurrence of food plant patches in large sizes relative to the nutritional and fecundity needs of the butterfly specialist on the species, select for egg-clustering to ensure survival of the butterfly population in that habitat. It is emphasized that the model proposed here requires considerable examination through field studies. (shrink)

To fit the magnificence of this setting in Beijing’s Great Hall of the People, and the honor of giving the 2007 Sir John Crawford Memorial Lecture, it is well to have a subject of suitable proportions. I have chosen one of global size and urgent time frame: our climate crisis. We only have one future and one global climate–and now it looks as if we only have one chance to rescue our civilization from collapse and prevent a mass extinction of (...) species during the 21st century. Unless you have been keeping up with climate science for the past twenty-five years, you likely do not know how serious the matter has become. The notion that we might slowly get into serious trouble by mid-century has been conveyed by the media and understood by at least some political leaders. But that scenario depends on somehow avoiding sudden shifts in climate in the meantime, instant setbacks at a time when we lack maneuvering room. An abrupt shift in drought area occurred in 1983 and we had a near-miss of a mass extinction of Amazon species in 1999. It is easy to appreciate that one more degree of global warming will seriously reduce crop yields in the tropics, but in the words of climate scientist Claudia Tebaldi 1, “It’s the extremes, not the averages, that cause the most damage to.. (shrink)

DISSERTAÇÃO DE MESTRADO WERNECK, Luzia Maria de Jesus. O espiritismo tropicalizado e o tratamento espiritual : um estudo de caso em Santa Luzia – MG. 2011. 137 folhas. Dissertação (Mestrado) – Pontifícia Universidade Católica de Minas Gerais, Programa de Pós-graduação em Ciências da Religião, Belo Horizonte.

It is widely accepted by the scientific community and beyond that human beings are primarily responsible for climate change and that climate change has brought with it a number of real problems. These problems include, but are not limited to, greater threats to coastal communities, greater risk of famine, and greater risk that tropical diseases may spread to new territory. In keeping with J. S. Mill's 'Harm Principle', green political theorists often respond that if we are contributing a harm to (...) others in contributing to climate change and its negative effects, we then have a negative duty to assist those we have harmed and to reduce our carbon emissions. In this paper, I will take seriously negative duties stemming from a contribution to climate change and demonstrate that our negative duties do not demand that we necessarily end our contribution to climate change if we were able to compensate those who may be affected by climate change. Thus, the conclusion of many green political theorists - that we must reduce our carbon emissions - does not necessarily follow from the view that humans are primarily responsible for climate change and its attended ill effects. (shrink)

This paper examines the study of computer basedperformance monitoring (CBPM) in the workplaceas an issue dominated by questions of ethics.Its central contention paper is that anyinvestigation of ethical monitoring practice isinadequate if it simply applies best practiceguidelines to any one context to indicate,whether practice is, on balance, ethical or not. The broader social dynamics of access toprocedural and distributive justice examinedthrough a fine grained approach to the study ofworkplace social relations, and workplaceidentity construction, are also important here. This has three (...) implications, which are examinedin the paper, and are as follows: First, thatit is vital for any empirical investigation ofthe ethics of CBPM practice to take intoaccount not only its compliance withpreexisting best practice guidelines, butalso the social relations which pervade thecontext of its application. Second, that thisnecessitates a particular epistemologicaltreatment of CBPM as something whose effectsare measurable and identifiable, as well assomething which has a socially constructedmeaning and is tropic in nature. Third, thatexisting debates against which this argument isset, which regard contrasting epistemologiesand ontologies as incompatible, should beaddressed, and an alternative introduced. Introducing situated knowledges (Haraway 1991)and material semiotic ontologies as such analternative, the paper proceeds to analyse theethics of a particular case of monitoringpractice, Norco. Drawing on Marx (1998) thepaper concludes that a fine grain analysis ofthe social is vital if we are to understandfully the ethics of monitoring in theworkplace. (shrink)

Darwin proposed that evolutionary novelties are environmentally induced in organisms “constitutionally” sensitive to environmental change, with selection effective owing to the inheritance of constitutional responses. A molecular theory of inheritance, pangenesis , explained the cross‐generational transmission of environmentally induced traits, as required for evolution by natural selection. The twentieth‐century evolutionary synthesis featured mutation as the source of novelty, neglecting the role of environmental induction. But current knowledge of environmentally sensitive gene expression, combined with the idea of genetic accommodation of mutationally (...) and environmentally induced change, supports a revival of Darwin's original theory that is consistent with modern molecular and population genetics. †To contact the author, please write to: Smithsonian Tropical Research Institute, c/o Escuela de Biología, Universidad de Costa Rica, Costa Rica; e‐mail: mjwe@sent.com. (shrink)

We are often faced with choices that involve the weighing of people's lives against each other, or the weighing of lives against other good things. These are choices both for individuals and for societies. A person who is terminally ill may have to choose between palliative care and more aggressive treatment, which will give her a longer life but at some cost in suffering. We have to choose between the convenience to ourselves of road and air travel, and the lives (...) of the future people who will be killed by the global warming we cause, through violent weather, tropical disease, and heat waves. We also make choices that affect how many lives there will be in the future: as individuals we choose how many children to have, and societies choose tax policies that influence people's choices about having children. These are all problems of weighing lives. How should we weigh lives? Weighing Lives develops a theoretical basis for answering this practical question. It extends the work and methods of Broome's earlier book Weighing Goods to cover the questions of life and death. Difficult problems come up in the process. In particular, Weighing Lives tackles the well-recognized, awkward problems of the ethics of population. It carefully examines the common intuition that adding people to the population is ethically neutral - neither a good nor a bad thing - but eventually concludes this intuition cannot be fitted into a coherent theory of value. In the course of its argument, Weighing Lives examines many of the issues of contemporary moral theory: the nature of consequentialism and teleology; the transitivity, continuity, and vagueness of betterness; the quantitative conception of wellbeing; the notion of a life worth living; the badness of death; and others. This is a work of philosophy, but one of its distinctive features is that it adopts some of the precise methods of economic theory (without introducing complex mathematics). Not only philosophers, but also economists and political theorists concerned with the practical question of valuing life, should find the book's conclusions highly significant to their work. (shrink)

For the complex or boundary objects in which I am interested . . . dimensions implode . . . they collapse into each other . . . story telling . . . is a fraught practice . . . In no way is story telling opposed to materiality, [sic] But materiality itself is tropic; it makes us swerve, it trips us; it is a knot of the textual, technical, mythic/oneric [sic], organic, political and economic.

The crisis of our times is that we have science without wisdom. This is the crisis behind all the others. Population growth, the terrifyingly lethal character of modern war and terrorism, immense differences of wealth across the globe, annihilation of indigenous people, cultures and languages, impending depletion of natural resources, destruction of tropical rain forests and other natural habitats, rapid mass extinction of species, pollution of sea, earth and air, thinning of the ozone layer, above all global warming - even (...) the aids epidemic: all these relatively recent crises have been made possible by modern science and technology. Indeed, in a perfectly reasonable sense of "cause", they have been caused by modern science and technology. An essential step we need to take, in order to tackle these global problems more effectively, intelligently and humanely than we have done so far, is to create a new kind of academic inquiry which puts problems of living, and the pursuit of wisdom, at the heart of the enterprise. (shrink)

Visionary quests to return to the Garden of Eden have shaped Western culture from Columbus' voyages to today's tropical island retreats. Few narratives are so powerful - and, as Carolyn Merchant shows, so misguided and destructive - as the dream of recapturing a lost paradise. A sweeping account of these quixotic endeavors by one of America's leading environmentalists, Reinventing Eden traces the idea of rebuilding the primeval garden from its origins to its latest incarnations in shopping malls, theme parks and (...) gated communities. With eloquence and insight, Merchant shows how the drive to conquer nature and to explore and settle the globe, springs from this utopian pastoral impulse throughout Western history. Time and again, human manipulation of the environment is our downfall: Eden is achieved by fencing off pristine beauty in national parks and wildlife preserves, while leaving the majority of the earth in ruins. Challenging both narratives, Merchant argues that the green veneer of city-park conservation has become a cover for the corruption of the earth and the neglect of its environment. Reinventing Eden is a bold new way to think about the earth that includes green political parties, sustainable development and a partnership between humans and earth that is nothing short of an ecological revolution. (shrink)

Integral Ecology uses multiple perspectives to analyze environmental problems. Four of Integral Ecology's major analytical perspectives (known as the quadrants) correspond to the four divisions of the liberal arts and sciences: fine arts, natural science, social science, and humanities. Integral Ecology also utilizes the analytical perspective provided by the idea of cultural moral development. This perspective helps to reveal how stakeholders at different developmental stages disclose a phenomenon, in this case, a tropical forest that loggers propose to clear-cut. Integral Ecology (...) takes into account all pertinent perspectives, in order to arrive at the best possible solution to environmental problems and conflicts. (shrink)

In this paper I assess Gopnik and Meltzoff's developmental psychology of science as a contribution to the understanding of scientific development. I focus on two specific aspects of Gopnik and Meltzoff's approach: the relation between their views and recapitulationist views of ontogeny and phylogeny in biology, and their overall conception of cognition as a set of veridical processes. First, I discuss several issues that arise from their appeal to evolutionary biology, focusing specifically on the role of distinctions between ontogeny and (...) phylogeny when appealing to biology for theoretical support. Second, I argue that to presuppose that cognition is veridical or "truth-tropic" can compromise attempts to understand scientific cognition both throughout history and in the present. Finally, I briefly sketch an evolutionary approach to understanding scientific development that contrasts with Gopnik and Meltzoff's. (shrink)

The second edition of Peter Lipton’s classic text contains new and important material on the causal model of explanation, the relation of inference to the best explanation to the Bayesian account of scientific reasoning, how exactly explanation guides inference, and why we ought to think that explanatory virtues are truth-tropic. Lipton is a wonderfully clear writer and a thorough and subtle philosopher, and his book is both a student-friendly introduction to the issues addressed, and essential reading for expert epistemologists and (...) philosophers of science. Appeal to the notion of inference to the best explanation is ubiquitous in defences of scientific realism, but also elsewhere in philosophy where the explanatory virtues of theories are often the only purported grounds for accepting or rejecting them. Despite this, most authors are far from explicit about the details of inference to the best explanation, and Lipton’s book is the most sustained investigation of the relationship between explanation and inference currently available. Furthermore, Lipton is exemplary in his engagement with the problems his arguments face, and judiciously modest in his claims, though not so modest as to court triviality. Hence, the book is replete with interesting and careful arguments. Everyone interested in epistemology or philosophy of science ought to read this book. That said, in my discussion below I will concentrate on what I regard as problems with some of Lipton’s arguments. The model of explanation which he develops is contrastive and causal. Lipton is clear that he does not think all explanations are causal, but he does think that many are, especially in science, and. (shrink)

[FIRST PARAGRAPHS] One third of the human species is infested with worms. The World Health Organization estimates that worms account for 40 percent of the global disease burden from tropical diseases excluding malaria. Worms cause a lot of misery. In this article I will focus on one particular type of infestation, which is hookworm. Approximately 740 million people suffer from hookworm infection in areas of rural poverty: more than one human in ten, a total greater than 23 times the population (...) of Canada or twice the population of the United States. The greatest numbers of cases occur in China, Southeast Asia and Sub-Saharan Africa—that is, mostly in the places in the world where poverty is most severe. (shrink)

This study examined the performance and future predictions for the Middle East produced by 18 global climate models participating in the Intergovernmental Panel on Climate Change Fourth Assessment Report. Under the Special Report on Emission Scenarios A2 emissions scenario the models predict an overall temperature increase of ~1.4 K by mid-century, increasing to almost 4 K by late-century for the Middle East. In terms of precipitation the southernmost portion of the domain experiences a small increase in precipitation due to the (...) Northward movement of the Inter-Tropical Convergence Zone. The largest change however is a decrease in precipitation that occurs in an area covering the Eastern Mediterranean, Turkey, Syria, Northern Iraq, Northeastern Iran and the Caucasus caused by a decrease in storm track activity over the Eastern Mediterranean. Other changes likely to impact the region include a decrease of over 170,000 km 2 in viable rainfed agriculture land by late-century, increases in the length of the dry season that reduces the length of time that the rangelands can be grazed, and changes in the timing of the maximum precipitation in Northern Iran that will impact the growing season, forcing changes in cropping strategy or even crop types. (shrink)

In 2005, The International Federation of Organic Agricultural Movements (IFOAM) developed four new ethical principles of organic agriculture to guide its future development: the principles of health, ecology, care, and fairness. The key distinctive concept of animal welfare in organic agriculture combines naturalness and human care, and can be linked meaningfully with these principles. In practice, a number of challenges are connected with making organic livestock systems work. These challenges are particularly dominant in immature agro-ecological systems, for example those that (...) are characterized by industrialization and monoculture. Some of the current challenges are partly created by shortages of land and manure, which encourage zero-grazing and other confined systems. Other challenges are created in part by the conditions for farming and the way in which global food distribution systems are organized, e.g., how live animals are transported, how feed is traded and transported all over the globe, and the development of infrastructure and large herds. We find that the overall organic principles should be included when formulating guidelines for practical organic animal farming. This article explores how the special organic conceptions of animal welfare are related to the overall principles of organic agriculture. The aim is to identify potential routes for future development of organic livestock systems in different contexts and with reference to the specific understanding of animal welfare in organic agriculture. We include two contrasting cases represented by organic livestock systems in northwestern Europe and farming systems in tropical low-income countries; we use these cases to explore the widely different challenges of organic livestock systems in different parts of the world. (shrink)

This article compares Alexander von Humboldt's and John Ruskin's writings on landscape art and natural landscape. In particular, Humboldt's conception of a habitat's essence as predominantly composed of vegetation as well as judgment of tropical American nature as the realm of nature of the highest aesthetic enjoyment is examined in the context of Ruskin's aesthetic theory. The magnitude of Humboldt's contribution to the natural sciences seems to have clouded our appreciation of his prominent status in the field of art history. (...) In addition to his position as scientist, Humboldt's role as aesthetician is demonstrated in this paper. Unlike Ruskin, who comfortably resides in the canon of art history relative to his minor significance in the field of geology, Humboldt has not been recognized for his impact on the world of art; his tremendous scientific importance seems to have overshadowed an appreciation of it. (shrink)

Matrix models are widely used in biology to predict the temporal evolution of stage-structured populations. One issue related to matrix models that is often disregarded is the sampling variability. As the sample used to estimate the vital rates of the models are of finite size, a sampling error is attached to parameter estimation, which has in turn repercussions on all the predictions of the model. In this study, we address the question of building confidence bounds around the predictions of matrix (...) models due to sampling variability. We focus on a density-dependent Usher model, the maximum likelihood estimator of parameters, and the predicted stationary stage vector. The asymptotic distribution of the stationary stage vector is specified, assuming that the parameters of the model remain in a set of the parameter space where the model admits one unique equilibrium point. Tests for density-dependence are also incidentally provided. The model is applied to a tropical rain forest in French Guiana. (shrink)

This paper integrates genetical studies of variation in the wing patterns of Lepidoptera with experimental investigations of developmental mechanisms. Research on the tropical butterfly,Bicyclus anynana, is described. This work includes artificial selection of lines with different patterns of wing eyespots followed by grafting experiments on the lines to examine the phenotypic and genetic differences in terms of developmental mechanisms. The results are used to show how constraints on the evolution of this wing pattern may be related to the developmental organisation. (...) The eyespot pattrn can be envisaged as a set of developmental homologues; a common developmental mechanism is associated with a quantitative genetic system involving high genetic correlations. However, individual genes which influence only subsets of the eyespots, thus uncoupling the interdependence of the eyespots, may be important in evolutionary change. The postulated evolutionary constraints are illustrated with respect to differences in wing pattern found among other species ofBicyclus. (shrink)

Tropical forest conservation in developing countries has repeatedly been highlighted as a new element in international climate policy. However, no clear ideas yet exist as to what shape such a conservation strategy might take. In the present paper, we would like to make some observations to this end. It is shown how projects in order to reduce CO 2 -emissions resulting from deforestation and degradation (REDD) can be integrated into a system of tradable emission rights in an industrialised country and (...) which requirements ought to be fulfilled. Instruments are emission credits and emission allowances. Driving actors interested in emission rights through forest projects may be private investors or the rainforest state itself. The efficiency of the system depends on a great extent on a binding reference path for the tolerable emissions from deforestation, which has been agreed upon and adhered to by the rainforest country by means of a forest law aimed at limiting deforestation. Our considerations lead us to conclude that the national baseline approach with an appropriate contribution by the rainforest country coupled with a decentralised system with private investors seems the most viable option. Since additional burdens are imposed on the rainforest country to some extent, a compromise could consist of agreeing on a moderate deforestation path, which is harmonised with the benefits from the forest projects. Combining both programmes (offset credits and emission allowances) is particularly attractive because all participants, and especially the industrialised country, benefit from it. The industrialised country can expand its climate conservation programme without any additional costs to a certain degree. (shrink)

Perforation or gap formation in a vegetation is a major process in landscape transformation. The occurrence of gaps profoundly alters the microclimatical conditions in a vegetation. A method is proposed to quantify perforation by using the three main 2-D characteristics of the gaps: area, number and boundary length. New measures are developed by normalizing the observed values to the reference status of minimum and maximum perforation. As minimum perforation status, the presence of one single gap with area equal to the (...) map resolution is assumed. The new measures are combined using a 3-D Euclidean distance to visualize the process and to detect changes. The method is exemplified using a field case of gaps in a tropical terra firme rainforest at Tiputini, Ecuador. (shrink)

Organisms are self-producing and self-maintaining, or autopoietic systems. Therefore, the course of evolution and adaptation of an organism is strongly determined by its own internal properties, whatever role external selection may play. The internal properties may either act as constraints that preclude certain changes or they open new pathways: the organism canalizes its own evolution. As an example the evolution of feeding mechanisms in salamanders, especially in the lungless salamanders of the family Plethodontidae, is discussed. In this family a large (...) variety of different feeding mechanisms is found. The authors reconstruct this evolutionary process as a series of bifurcation points of either constraints or opportunities forming a sequence of preconditions for the formation of a high-speed projectile tongue characteristic of tropical salamanders. Furthermore, it is shown how parallel evolution of seemingly unrelated domains within an organism such as respiratory physiology, life history biology and pattern of ontogeny has rather direct relevance to the feeding biology, thus demonstrating that organisms always evolve as wholes. (shrink)

e live on a wonderful planet that not only teems with life but shows a marvellous exuberance of form and variety. In comparison with the size of the Earth its living skin (the so-called biosphere) may be thin, but it is by no means negligible. From high in the atmosphere, where ballooning spiders wafted aloft on their silk-strings have been trapped at heights of more than 4500 m and birds such as condors cross tropical storms at altitudes well above 6000 (...) in, via the oceans and the green continents, to deep within the Earth's crust where bacteria are known to live at depths of at least several kilometres, life is pervasive. (shrink)

A concept for a primitive angiospermous branch system is given in order to have a starting point for the derivation of the diverse and highly differentiated branch systems observed in contemporary angiosperms. Hitherto Troll's (1964, 1969) comparative study of the synflorescences in this plant group — developed out predominantly on herbaceous plants — was the most comprehensive and sophisticated treatment dealing with branch systems. Unfortunately, the work on tropical tree architecture by Hallé et al. (1978) has no reference to the (...) classical studies of Troll and his pupils. Thus Müller-Doblies and Weberling (1984) emphasized the high degree of terminological incompatibility between the two works. Angiosperms are seen as a monophyletic plant division. Consequently, the branch system of the first primitive angiosperms must be the starting point in the evolution of the abundant diversity of branch systems and growth forms of modern angiosperms. If it is accepted that primitive angiospermous shoots were terminated by a large flower, one may assume, that the reproductive end of the shoot was enriched by paracladia early in evolution, thereby developing a terminal inflorescence instead of a single flower. Thus the primitive shoot unit was divided into a basal vegetative region — the trophotagma, branching retardively — and the reproductive terminal region, the anthotagma, branching simultaneously. It is demonstrated through a selection of different examples, that the construction of such a system possesses the options for several modifications, enabling the evolution of the abundant diversity of branch systems which characterizes contemporary angiosperms. (shrink)

Medical experimentation on humans with classic sexually transmitted diseases (e.g., syphilis, gonorrhea) is not generally well known, but experimentation with others such as Granuloma inguinale, or Donovanosis, is even less so. Endemic to non-existent here, hyper-epidemic there, between 1880 and 1950 Donovanosis was linguistically and morally constructed as a disease of poor, sexually profligate, tropical, darkly-skinned persons. It was also experimentally produced on and in African-American patients in many charity hospitals in the American South. This essay analyzes Donovanosis literature of (...) the period that heavily featured skin color, climate and tropicality, venereal sin, and racial susceptibility. It then recounts the history of human experimentation with it, and explains both its linguistic construction and its biomedical experimental history in terms of disease narratives produced not only by but for venereologists. (shrink)

The worldwide variation in mating strategies can be explained by differential paternal investment theory, which traces the differences back to the climates where the various peoples (races) evolved. Male provisioning is necessary for women and children to survive cold winters, which is less essential for tropical women. Androstenone may be the substance that makes symmetrical men smell better to fertile females.

Salomón de la Selva (1893-1959) was a Nicaraguan writer/activist who authored many books of verse in Spanish, but only one in English: TropicalTown, And Other Poems (1918). Published in New York by John Lane–and regarded by Silvio Sirias as the first book of English verse published in the U.S.by a Latin American–Tropical Town exhibits a curious dynamic of avantgarde impulse: radically subversive in invoking counter-politics resisting U.S. colonial transnationalism, yet tending toward inherited, traditional aesthetic forms of poetry meant to legitimize (...) Selva’s Latin American identity with an impression of authority that contiguous Modernist experimental poetries could not. Through its sympathy for the U.S. immigrant’s nostalgia for homeland, coupled with express disapproval of U.S. international affairs, Tropical Town leaves a poetic record that challenges presuppositions about the integral relationships between ethos, aesthetics, and consciousness vis-à-vis assumed understandings of what constitutes radical poetry in the Modernist moment. (shrink)

In his third and final investigation into the science of belief, bestselling author Michael Shermer tackles the evolution of morality and ethics A century and a half after Darwin first proposed an “evolutionary ethics,” science has begun to tackle the roots of morality. Just as evolutionary biologists study why we are hungry (to motivate us to eat) or why sex is enjoyable (to motivate us to procreate), they are now searching for the roots of human nature. In The Science of (...) Good and Evil , psychologist and science historian Michael Shermer explores how humans evolved from social primates to moral primates, how and why morality motivates the human animal, and how the foundation of moral principles can be built upon empirical evidence. Along the way he explains the im-plications of statistics for fate and free will fuzzy logic for the existence of pure good and pure evil and ecology for the development of early moral sentiments among the first humans. As he closes the divide between science and morality, Shermer draws on stories from the Yanamamo, infamously known as the “fierce people” of the tropical rain forest, to the Aum Shinrikyo cult in Japan, to John Hinckley’s insanity defense. The Science of Good and Evil is ultimately a profound look at the moral animal, belief, and the scientific pursuit of truth. (shrink)