The summertime plankton community at South Georgia (Southern Ocean): comparing the historical (1926/27) and modern (post 1995) records.

The earliest comprehensive plankton sampling programme in the Southern Ocean was 32 undertaken during the early part of last century by Discovery Investigations to gain a 33 greater scientific understanding of whale stocks and their summer feeding grounds. An 34 initial survey was carried out around South Georgia during December 1926 and January 35 1927 to describe the distribution of plankton during the summer, and to serve as a 36 baseline against which to compare future surveys. We have reanalysed phytoplankton and 37 zooplankton data from this survey and elucidated patterns of community distribution and 38 compared them with our recent understanding of the ecosystem based on contemporary 39 data. Analysis of Discovery data identified five groups of stations with characteristic 40 phytoplankton communities which were almost entirely consistent with the original 41 analysis conducted by Hardy and Gunther (1935). Major groupings were located at the 42 western end of the island and over the northern shelf where Corethron spp. were 43 dominant, and to the south and east where a more diverse flora included high abundances 44 of Nitzschia seriata. Major zooplankton-station groupings were located over the inner 45 shelf which was characterised by a high abundance of Drepanopus forcipatus and in 46 oceanic water >500 m deep that were dominated by Foraminifera, Oithona spp., 47 Ctenocalanus vanus, and Calanoides acutus. Stations along the middle and outer shelf 48 regions to the north and west, were characterised by low overall abundance. There was 49 some evidence that groupings of stations to the north of the island originated in different 50 water masses on either side of the Southern Antarctic Circumpolar Current Front, the 51 major frontal system in the deep ocean close to South Georgia. However, transect lines 52 during 1926/27 did not extend far enough offshore to sample this frontal region 53 3 adequately. Interannual variability of zooplankton abundance was assessed from stations 54 which were sampled repeatedly during 7 recent British Antarctic Survey cruises (1995-55 2005) to the region and following taxonomic harmonization and numerical 56 standardization (ind. m-3), a subset of 45 taxonomic categories of zooplankton (species 57 and higher taxa) from 1926/27, were compared with similar data obtained during the 58 BAS cruises using a linear model. Initially comparisons were restricted to BAS stations 59 that lay within 40 km of Discovery stations although a comparison was also made using 60 all available data. Despite low abundance values in 1926/27, in neither comparison did 61 Discovery data differ significantly from BAS data. Calculation of the percentage 62 similarity index across cruises did not reveal any systematic differences in species 63 composition between 1926/27 and the present. In the light of ocean warming trends, the 64 existence of more subtle changes in species composition is not ruled out, but an absence 65 of finely resolved time-series data make this impossible to determine

The public–private pension mix in OECD countries

This article surveys the relationship between public and private pension provision in the countries of the Organisation for Economic Co-operation and Development. OECD. Population ageing has led many OECD countries to undertake a wide range of pension reforms. The overall effect of these reforms has in many cases been to reduce public pension promises, often signficantly. This, in turn, has increased the role of private pensions, which have expanded significantly in a number of countries. The article discusses the extent to which a number of countries will need to further increase private provision in order to guarantee adequate future retirement incomes.pension; retirement

Constraints on the thermal and tectonic evolution of Greymouth coalfield

The southern end of the Paparoa Range in Westland, South Island, New Zealand, comprises an asymmetrical, southward plunging, faulted (Brunner-Mt Davy) anticline, the eastern limb of which is common with the western limb of an asymmetrical (Grey Valley) syncline forming a Neogene foreland basin (Grey Valley Trough). The faulted anticline is a classic inversion structure: compression during the Neogene, associated with the development of the modern Australia-Pacific plate boundary, caused a pre-existing normal fault zone, about which a late Cretaceous-Oligocene extensional half graben had formed (Paparoa Trough), to change its sense of displacement. The resulting basement loading formed the foreland basin, containing up to 3 km of mainly marine sedimentary section. Fission track results for apatite concentrates from 41 shallow drillhole and outcrop samples from the Greymouth Coalfield part of the Brunner-Mt Davy Anticline are reported and interpreted, to better establish the timing and amount of inversion, and hence the mechanism of inversion. The fission track results integrated with modelling of vitrinite reflectance data, show that the maximum paleotemperatures experienced during burial of the Late Cretaceous and mid-Eocene coal-bearing succession everywhere exceeded 85deg.C, and reached a peak of 180deg.C along the axis of the former basin. Cooling from maximum temperatures occurred during three discrete phases: 20-15 Ma, 12-7 Ma, and c. 2 Ma to the present. The amount of denudation has been variable across the inverted basin, decreasing westward from a maximum of c. 2.5 km during the first deformation phase, c. 1.2 km during the second phase, and 1.4 km during the third phase. It appears that exhumation over the coalfield continued for about 2 m.y. beyond the biostratigraphically determined time ranges of each of two synorogenic unconformities along the western limb of the Grey Valley Syncline. Stick-slip behaviour on the range front fault that localised the inversion is inferred. The tectonic evolution of the anticline-syncline pair at the southern end of the Paparoa Range, is therefore identical in style, and similar in timing, to the development of the Papahaua Range-Westport Trough across the Kongahu Fault Zone, in the vicinity of Buller Coalfield

Describing the Dying Days of Alzheimer\u27s disease

There is no doubt that individuals, families, communities, and governments face an enormous challenge in the growing number of persons with dementia in our societies. Accompanying this demographic boomis an opportunity to examine the way we think about the vast, miscellaneous category we currently call “Alzheimer’s disease”, (AD), which has just eclipsed its 100th year in the medical lexicon

Marketplace of Memory: What the Brain Fitness Technology Industry Says About Us and How We Can Do Better

In the therapeutic void created by over 20 failed Alzheimer\u27s disease drugs during the past decade, a new marketplace of brain fitness technology products has emerged. Ranging from video games and computer software to mobile phone apps and hand-held devices, these commercial products promise to maintain and enhance the memory, concentration, visual and spatial skills, verbal recall, and executive functions of individual users. It is instructive to view these products as sociocultural objects deeply imbued with the values and ideologies of our age; consequently, this article offers a critique of the brain fitness technology marketplace while identifying limitations in the capacity of commercial products to realistically improve cognitive health. A broader conception of brain health is presented, going beyond the reductionism of the commercial brain fitness marketplace and asking how our most proximate relationships and local communities can play a role in supporting cognitive and psychosocial well-being. This vision is grounded in recent experiences at The Intergenerational School in Cleveland, OH, a multigenerational community-oriented learning environment that is implementing brain fitness technology in novel ways

A Tale of Two Reports: What Recent Publications from the Alzheimer’s Association and Institute of Medicine Say About the State of the Field

Scientific reports hold a mirror up to a culture, reflecting the beliefs, values, assumptions, practices, technologies, and political-economic interests that shape discourse around particular diseases in particular cultural moments [1]. Indeed, despite their authoritative patina, such reports are “living documents” that invite critical analysis about where discourse in a particular field has been and where it is going. In this spirit, two recent reports from the Alzheimer’s Association (Changing the Trajectory of Alzheimer’s Disease: How a Treatment by 2025 Saves Lives and Dollars) and the Institute of Medicine in the United States (Cognitive Aging: Progress in Understanding and Opportunities for Action) are worthy of attention from those endeavoring to understand and contextualize the science and politics of brain health, aging, and dementia [2]

Intergenerative Transdisciplinarity in “Glocal” Learning and Collaboration

In this report, authors from North America, Africa, Europe, and Asia share commonalities and differences in the lessons we are learning from COVID-19, especially about scholarship and collaboration. We represent different ages and disciplines hence our focus on intergenerational perspectives and transdisciplinary considerations. Our work is intergenerative{that is going between to go beyond by connecting creative sources of culture and focusing on the emergent, that is responding to changes in the context in which we work. And importantly in our view, we will point beyond whatever the next phase of COVID or even the next pandemic brings to a more hopeful, sustainable, and flourishing future, even as we face mounting social, health, and environmental challenges

Intergenerational Community Schools: A New Practice for a New Time

This article outlines the concept and initial implementation of an intergenerational learning community (ILC), a new charter school concept, and reviews relevant literature. We discuss the mission, curriculum, educational design, philosophy, and lessons learned from initial implementation of The Intergenerational School (TIS). Such multiage communities of learners represent a conceptual and organizational response to the challenges that rapid cultural and environmental change and resultant alienation are posing for human societies. © 2000 Taylor and Francis Group, LLC

Making the Case for the Accelerated Withdrawal of Aducanumab

U.S. Food and Drug Administration-s (FDA) approval of aducanumab (Aduhelm® in the US) as a treatment for mild cognitive impairment of the Alzheimer type and Alzheimer-s disease has raised such major concerns about efficacy, safety, FDA processes, and regulatory capture that Biogen-s license to market this biologic should be immediately withdrawn. Aducanumab has not demonstrated benefit to patients, failed to meet regulatory guidelines, and is likely to cause both individual and societal harm

Intergenerative Transdisciplinarity in a Future of Aging Professions: New Words Are Not Enough

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