A lake's life is not its own

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/62504/1/408149a0.pd

Ecosystem Resilience and Threshold Response in the Galápagos Coastal Zone

Background: The Intergovernmental Panel on Climate Change (IPCC) provides a conservative estimate on rates of sea-level rise of 3.8 mm yr⁻¹ at the end of the 21st century, which may have a detrimental effect on ecologically important mangrove ecosystems. Understanding factors influencing the long-term resilience of these communities is critical but poorly understood. We investigate ecological resilience in a coastal mangrove community from the Galápagos Islands over the last 2700 years using three research questions: What are the 'fast and slow' processes operating in the coastal zone? Is there evidence for a threshold response? How can the past inform us about the resilience of the modern system?Methodology/Principal Findings: Palaeoecological methods (AMS radiocarbon dating, stable carbon isotopes (δ13C)) were used to reconstruct sedimentation rates and ecological change over the past 2,700 years at Diablas lagoon, Isabela, Galápagos. Bulk geochemical analysis was also used to determine local environmental changes, and salinity was reconstructed using a diatom transfer function. Changes in relative sea level (RSL) were estimated using a glacio-isostatic adjustment model. Non-linear behaviour was observed in the Diablas mangrove ecosystem as it responded to increased salinities following exposure to tidal inundations. A negative feedback was observed which enabled the mangrove canopy to accrete vertically, but disturbances may have opened up the canopy and contributed to an erosion of resilience over time. A combination of drier climatic conditions and a slight fall in RSL then resulted in a threshold response, from a mangrove community to a microbial mat.Conclusions/Significance: Palaeoecological records can provide important information on the nature of non-linear behaviour by identifying thresholds within ecological systems, and in outlining responses to 'fast and slow' environmental change between alternative stable states. This study highlights the need to incorporate a long-term ecological perspective when designing strategies for maximizing coastal resilience.</p

The Long Term Response of Birds to Climate Change: New Results from a Cold Stage Avifauna in Northern England

The early MIS 3 (55–40 Kyr BP associated with Middle Palaeolithic archaeology) bird remains from Pin Hole, Creswell Crags, Derbyshire, England are analysed in the context of the new dating of the site’s stratigraphy. The analysis is restricted to the material from the early MIS 3 level of the cave because the upper fauna is now known to include Holocene material as well as that from the Late Glacial. The results of the analysis confirm the presence of the taxa, possibly unexpected for a Late Pleistocene glacial deposit including records such as Alpine swift, demoiselle crane and long-legged buzzard with southern and/or eastern distributions today. These taxa are accompanied by more expected ones such as willow ptarmigan /red grouse and rock ptarmigan living today in northern and montane areas. Finally, there are temperate taxa normally requiring trees for nesting such as wood pigeon and grey heron. Therefore, the result of the analysis is that the avifauna of early MIS 3 in England included taxa whose ranges today do not overlap making it a non-analogue community similar to the many steppe-tundra mammalian faunas of the time. The inclusion of more temperate and woodland taxa is discussed in the light that parts of northern Europe may have acted as cryptic northern refugia for some such taxa during the last glacial. These records showing former ranges of taxa are considered in the light of modern phylogeographic studies as these often assume former ranges without considering the fossil record of those taxa. In addition to the anomalous combination of taxa during MIS 3 living in Derbyshire, the individuals of a number of the taxa are different in size and shape to members of the species today probably due to the high carrying capacity of the steppe-tundra

How wrong is Paternalism?

In this paper, I argue against the commonly held view that paternalism is all things considered wrong when it interferes with a person’s autonomy. I begin by noting that the plausibility of this view rests on the assumption that there is a morally relevant difference in the normative reasons concerning an intervention in a person’s self-regarding actions and an intervention in his other-regarding actions. I demonstrate that this assumption cannot be grounded by wellbeing reasons, and that autonomy-based reasons of non-interference also cannot adequately explain the difference. Following this, I propose that the difference in the reasons related to an intervention in a person’s self-regarding actions and an intervention in his other-regarding actions can be explained by the value of holding a person responsible for his choices. Nonetheless, this does not result in paternalistic behavior that interferes with autonomy being all things considered wrong. Instead, I show that the reason to hold a person responsible for a diminution of his wellbeing does not necessarily defeat the wellbeing reasons that count in favor of paternalistic behavior

Neuroscience and social problems: the case of neuropunishment

Neuroscientific interventions are increasingly proposed as solutions for social problems, beyond their application in biomedicine. For example, there is increasing interest, particularly from outside commentators, in harnessing neuroscientific advances as an alternative method of punishing criminal offenders. Such neuropunishments are seen as a potentially more effective, less costly, and more humane alternative to incarceration, with overall better results for offender, communities, and societies. This article considers whether neuroscience as a field should engage more actively with such proposals, and whether more research should be done to explore the use of neurointerventions for punishment. It concludes that neuroscientists and those working at the intersection of neuroscience and the clinic should actively shape these debates

Neuroscience and social problems: the case of neuropunishment

Neuroscientific interventions are increasingly proposed as solutions for social problems, beyond their application in biomedicine. For example, there is increasing interest, particularly from outside commentators, in harnessing neuroscientific advances as an alternative method of punishing criminal offenders. Such neuropunishments are seen as a potentially more effective, less costly, and more humane alternative to incarceration, with overall better results for offender, communities, and societies. This article considers whether neuroscience as a field should engage more actively with such proposals, and whether more research should be done to explore the use of neurointerventions for punishment. It concludes that neuroscientists and those working at the intersection of neuroscience and the clinic should actively shape these debates