Tracking Hunter-Gatherer Impact on Vegetation in Last Interglacial and Holocene Europe: Proxies and Challenges

We review palaeoenvironmental proxies and combinations of these relevant for understanding hunter-gatherer niche construction activities in pre-agricultural Europe. Our approach consists of two steps: (1) identify the possible range of hunter-gatherer impacts on landscapes based on ethnographic studies; (2) evaluate proxies possibly reflecting these impacts for both the Eemian (Last Interglacial, Middle Palaeolithic) and the Early–Middle Holocene (Mesolithic). We found these paleoenvironmental proxies were not able to unequivocally establish clear-cut differences between specific anthropogenic, climatic and megafaunal impacts for either time period in this area. We discuss case studies for both periods and show that published evidence for Mesolithic manipulation of landscapes is based on the interpretation of comparable data as available for the Last Interglacial. If one applies the ‘Mesolithic’ interpretation schemes to the Neanderthal record, three common niche construction activities can be hypothesised: vegetation burning, plant manipulation and impact on animal species presence and abundance. Our review suggests that as strong a case can be made for a Neanderthal impact on landscapes as for anthropogenic landscape changes during the Mesolithic, even though the Neanderthal evidence comes from only one high-resolution site complex. Further research should include attempts (e.g. by means of modelling studies) to establish whether hunter-gatherer impact on landscapes played out at a local level only versus at a larger scale during both time periods, while we also need to obtain comparative data on the population sizes of Last Interglacial and Holocene hunter-gatherers, as these are usually inferred to have differed significantly.

Music and philosophical naturalism

<p>The philosophical and scientific explication of music is a cutting-edge field in contemporary academia. This thesis develops a naturalistic framework for theorising about music. The following novel philosophical positions are motivated and defended: a polysemy analysis of “sound”, conceptual pluralism about music, a pluralistic framework for approaching the science of music, and a fictionalist account of Western musical artworks. The adaptation/ by-product framework for couching discussion about the evolution of music is critiqued. A novel, co-evolutionary, niche construction model of the foundations of musicality and the origins, expansion and stabilisation of music is developed, couched in the general context of hominin evolution and prehistory. Conceptual and methodological reflection accompanies the evolutionary scenario developed.</p>

Music and philosophical naturalism

<p>The philosophical and scientific explication of music is a cutting-edge field in contemporary academia. This thesis develops a naturalistic framework for theorising about music. The following novel philosophical positions are motivated and defended: a polysemy analysis of “sound”, conceptual pluralism about music, a pluralistic framework for approaching the science of music, and a fictionalist account of Western musical artworks. The adaptation/ by-product framework for couching discussion about the evolution of music is critiqued. A novel, co-evolutionary, niche construction model of the foundations of musicality and the origins, expansion and stabilisation of music is developed, couched in the general context of hominin evolution and prehistory. Conceptual and methodological reflection accompanies the evolutionary scenario developed.</p>

New Discoveries and Theoretical Implications for the Last Foraging and First Farming in East Asia

A brief summation of the issue’s articles is presented. This leads to a discussion of thematic issues of concepts, methods, and theory that crosscut the articles. These include use of the EnvCalc2.1 program, some issues of terminology, the theoretical approaches of niche construction as opposed to human behavioral ecology (HBE), and the linkage between technology and subsistence change, notably the difference between biface and microblade production.

Cave Art and the Evolution of the Human Mind

<p>The discovery of cave paintings made by our Upper Paleolithic ancestors in Western Europe was an astonishing find – so astonishing, that they were originally believed to have been fakes. However, as more sites were uncovered, their authenticity was confirmed. But how could these people, who at the time of the discovery were believed to be merely dumb brutes, create such beautiful and naturalistic representations? And an even more difficult question to answer was, why? In this thesis I examine the phenomenon of Paleolithic cave art and what it might be able to tell us about the minds of the Cro-Magnon artists who produced it. I survey the paintings that have so far been discovered, as well as the processes involved in creating them. I also discuss and critique a selection of the many theories that have attempted to explain the motivation behind this radically different type of human behaviour. But due to the lack of hard evidence, none of these theories are ever likely to be fully substantiated. So a more promising line of investigation I take is to appraise the cognitive abilities Cro-Magnons would have needed to produce the paintings – and this then allows me to consider whether cave art was indicating any new cognitive development. I therefore highlight one of the effects that creating cave paintings had: it allowed information from the brain to be stored in the environment. But the manner in which this form of epistemic engineering might enhance human cognition is a hotly debated subject. I examine two theories: the extended mind hypothesis, and the theory of niche construction. In concluding this thesis, I argue that cave art seems more like an example of epistemic niche construction than a constituent of an extended mind.</p>

Cave Art and the Evolution of the Human Mind

<p>The discovery of cave paintings made by our Upper Paleolithic ancestors in Western Europe was an astonishing find – so astonishing, that they were originally believed to have been fakes. However, as more sites were uncovered, their authenticity was confirmed. But how could these people, who at the time of the discovery were believed to be merely dumb brutes, create such beautiful and naturalistic representations? And an even more difficult question to answer was, why? In this thesis I examine the phenomenon of Paleolithic cave art and what it might be able to tell us about the minds of the Cro-Magnon artists who produced it. I survey the paintings that have so far been discovered, as well as the processes involved in creating them. I also discuss and critique a selection of the many theories that have attempted to explain the motivation behind this radically different type of human behaviour. But due to the lack of hard evidence, none of these theories are ever likely to be fully substantiated. So a more promising line of investigation I take is to appraise the cognitive abilities Cro-Magnons would have needed to produce the paintings – and this then allows me to consider whether cave art was indicating any new cognitive development. I therefore highlight one of the effects that creating cave paintings had: it allowed information from the brain to be stored in the environment. But the manner in which this form of epistemic engineering might enhance human cognition is a hotly debated subject. I examine two theories: the extended mind hypothesis, and the theory of niche construction. In concluding this thesis, I argue that cave art seems more like an example of epistemic niche construction than a constituent of an extended mind.</p>

How development affects evolution

How development affects evolution. A mathematical framework that explicitly integrates development into evolution has recently been derived. Here we use this framework to analyse how development affects evolution. We show that, whilst selection pushes genetic and phenotypic evolution uphill on the fitness landscape, development determines the admissible evolutionary pathway, such that evolutionary outcomes occur at path peaks, which need not be peaks of the fitness landscape. Development can generate path peaks, triggering adaptive radiations, even on constant, single-peak landscapes. Phenotypic plasticity, niche construction, extra-genetic inheritance, and developmental bias variously alter the evolutionary path and hence the outcome. Selective development, whereby phenotype construction may point in the adaptive direction, may induce evolution either towards or away landscape peaks depending on the developmental constraints. Additionally, developmental propagation of phenotypic effects over age allows for the evolution of negative senescence. These results help explain empirical observations including punctuated equilibria, the paradox of stasis, the rarity of stabilizing selection, and negative senescence, and show that development has a major role in evolution.

Coral niche construction: coral recruitment increases along a coral-built structural complexity gradient

Niche construction is the process through which organisms modify environmental states in ways favourable to their own fitness. Here, we test experimentally whether scleractinian corals can be considered niche constructors. In particular, we demonstrate a positive feedback involved in corals building structures which facilitate recruitment. Coral larval recruitment is a key process for coral reef persistence. Larvae require low flow conditions to settle from the plankton, and hence the presence of colony structures that can break the flow is expected to facilitate coral recruitment. Here, we show an increase in settler presence on artificial tiles deployed in the field along a gradient of coral-built structural complexity. Structural complexity had a positive effect on settlement, with an increase of 15,71% of settler presence probability along the range of structural complexity considered. This result provides evidence that coral built structural complexity creates conditions that facilitate coral settlement, while demonstrating that corals meet the criteria for ecological niche construction.