3,339 research outputs found
The Blue Hills Igneous Complex Boston Area, Massachusetts
Guidebook for field trips to the Boston area and vicinity : 68th annual meeting, New England Intercollegiate Geological Conference, October 8-10, 1976: Trip A-3; B-
Improving the effectiveness of interventions to balance conservation and development: a conceptual framework
There are numerous case studies around the world describing integrated conservation and development projects (ICDPs). Recently some localized syntheses have been published that use sophisticated statistics to identify patterns and causal linkages, but no attempt has yet been made to draw together lessons from across the globe. This paper is an attempt to provide a framework for such an analysis. A set of lessons is proposed for improving the prospects of ICDPs by giving consideration to each of the five capitals: natural, social, human, built, and financial. The language of ICDPs has been adopted by development agencies of all persuasions. There is now some urgency to identify the characteristics of the environment and the community in which success is most likely. This paper is intended as a step in that direction
An integrated study of the Blue Hills porphyry and related units Quincy and Milton, Massachusetts,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1974.Bibliography: leaves 139-146.by Suzanne Sayer.M.S
Corrigendum to "Variability of above-ground litter inputs alters soil physicochemical and biological processes: a meta-analysis of litterfall-manipulation experiments" published in Biogeosciences, 10, 1–11, 2013
No abstract available
Inventory of ponds in the Norfolk Coast AONB - recommendations for pond survey and conservation
The banning of tributyltin (TBT) from boat antifouling paints in the late 1980s led to its
replacement by alternative biocide additives (Voulvoulis et al., 2000; Marcheselli et
al., 2010), including Cu (Dahl & Blanck, 1996) and Zn as active ingredients. It has
been reported that Cu and Zn compounds associated with these biocides have
caused substantial contamination of harbour and marina sediments (Eklund et al.,
2010; Parks et al., 2010), with negative toxic consequences for aquatic organisms
(Ytreberg et al., 2010). Indeed, it is evident that Cu and Zn compounds present in
paint fragments are readily leached into the water column allowing entry into aquatic
food webs (Jessop & Turner, 2011). Nevertheless, relatively little is known regarding
antifoulant-derived metals contamination in freshwater lakes.
The Norfolk and Suffolk Broads (Eastern England, UK) have been contaminated by
antifoulant-derived heavy metals, particularly Cu and Zn which have increased since
the banning of TBT (post-1987) in parts of the boated system (Boyle et al., in prep.).
Further, recent studies suggest that current levels of sediment contamination by Cu
may have negative ecological effects for aquatic ecosystems including inhibition of
aquatic macrophyte germination and performance (Boyle et al., submitted; S.
Lambert, unpublished data).
In Hickling Broad (Thurne Broads system), post-TBT increases in Cu and Zn are also
evident, with an interesting peak in Cu for the late 1990s in core HICK1 (Figure 1).
This coincides with the large-scale loss of aquatic macrophytes (especially
Characeae) from the lake in 1999 (Barker et al., 2008). HICK1 was collected in 2003.
In the proposed study we sought to gain a fuller understanding of recent metal
contamination in Hickling Broad up to the present day, whilst looking to verify and
better contextualise the late 1990s Cu peak. Further, we aimed to determine whether
the peak in Cu for Hickling Broad was also recorded at Horsey Mere which is used as
a control site in this study i.e. is it just a Hickling phenomenon? Or is it a Thurne
Broads system-wide effect
Type of milk feeding in infancy and health behaviours in adult life: findings from the Hertfordshire Cohort Study
A number of studies suggest that breast-feeding has beneficial effects on an individual's cardiovascular risk factors in adulthood, although the mechanisms involved are unknown. One possible explanation is that adults who were breastfed differ in their health behaviours. In a historical cohort, adult health behaviours were examined in relation to type of milk feeding in infancy. From 1931 to 1939, records were kept on all infants born in Hertfordshire, UK. Their type of milk feeding was summarised as breastfed only, breast and bottle-fed, or bottle-fed only. Information about adult health behaviours was collected from 3217 of these men and women when they were aged 59–73 years. Diet was assessed using an administered FFQ; the key dietary pattern was a ‘prudent’ pattern that described compliance with ‘healthy’ eating recommendations. Of the study population, 60 % of the men and women were breastfed, 31 % were breast and bottle-fed, and 9 % were bottle-fed. Type of milk feeding did not differ according to social class at birth, and was not related to social class attained in adult life. There were no differences in smoking status, alcohol intake or reported physical activity according to type of milk feeding, but there were differences in the participants' dietary patterns. In a multivariate model that included sex and infant weight gain, there were independent associations between type of feeding and prudent diet scores in adult life (P= 0·009), such that higher scores were associated with having been breastfed. These data support experimental findings which suggest that early dietary exposures can have lifelong influences on food choice
Neo-Statecraft Theory, Historical Institutionalism and Institutional Change
This article provides a critical examination of the contribution that statecraft theory, which has been subject to recent revision and development, makes to the literature on institutional change. It articulates an emergent neo-statecraft approach that offers an agent-led form of historical institutionalism. This overcomes the common criticism that historical institutionalists underplay the creative role of actors. The article also argues that the approach brings back into focus the imperatives of electoral politics as a source of institutional change and provides a macro theory of change which is also commonly missing from historical institutionalist work. It can therefore identify previously unnoticed sources of stability and change, especially in states with strong executives and top-down political cultures
Combined palaeolimnological and ecological approach provides added value for understanding the character and drivers of recent environmental change in Flow Country lakes
The Flow Country peatlands receive national and international recognition and protection as a highly valued habitat, and also provide a number of important ecosystem services. While there has been much research on the terrestrial peatland habitat of the Flow Country, the area’s many hundreds of natural water bodies have been largely unstudied. The first part of this study therefore focuses on establishing the contemporary conditions at 18 Flow Country lakes, examining between-lake heterogeneity in terms of physical structure, water chemistry and biological communities. Temporal change in these lakes is then considered by combining contemporary ecological and palaeolimnological approaches. We examine how the diatom and chironomid communities of Flow Country lakes have changed since a time prior to the mid-nineteenth century. Results show that the lake communities today are different to those present pre-1850, containing more taxa tolerant of increased acidity and nutrient availability. General linear modelling (GLM) analysis demonstrated a statistically significant association between the extent of change in diatom communities and both dissolved organic carbon (DOC) and nitrate. Community shifts, though considerable, are shown to be complex and idiosyncratic and no shift between trophic states is indicated. The extent and type of coarse-scale community change we observed points to widespread bottom-up drivers such as land management, afforestation and/or atmospheric deposition rather than more localised management practices such as fish stocking. The benefits of combining approaches is discussed and palaeolimnological methods by which land management, afforestation and atmospheric deposition could be further disentangled are identified
Pinnipeds, people and photo identification: the implications of grey seal movements for effective management of the species
This is the author accepted manuscript. The final version is available from Cambridge University Press via the DOI in this record.Grey seals (Halichoerus grypus) of the North-east Atlantic are protected at designated European Marine Sites (Special Areas of Conservation, SACs) typically during their reproductive periods and in the UK at Sites of Special Scientific Interest (SSSI). As a mobile marine species, grey seals spend other parts of their annual life cycle in non-designated habitat. There is limited information on individual grey seal movements in south-west England. Citizen science photo identification (PID) revealed the movements of 477 grey seals at a regional scale (54 haul-outs up to 230 km apart) for over a decade. Reconstructed movements showed considerable individual variability. Four SACs were linked to up to 18 non-designated sites and two SSSIs in Cornwall were linked to a maximum of 41 non-designated sites. Observations support the value of existing SSSIs at both the well-connected West and North Cornwall sites. Thirteen Marine Protected Areas (MPAs) were visited by grey seals from four SACs and two SSSIs in Cornwall. As a mobile species, grey seals could be included in English MPA management plans. The application of functional linkage from SACs and SSSIs, informed by the movements evidenced in this research, could aid management efforts. This analysis reveals grey seal movements occur across a complex network of interconnected designated and non-designated sites that need to be managed holistically for this species for which the UK has a special responsibility
Palaeoecological investigation of the past biological structure and function of the Trinity Broads
This is the final report to the Trinity Broads Partnership on the ‘Palaeoecological investigation of the past biological structure and function in the Trinity Broads’. The Trinity Broads are deeper and
discrete from much of the rest of the Norfolk Broads and there has therefore been much speculation
that their biology was different from the Broads in other river basins. The aim of the project was to
employ palaeoecological techniques to investigate the past biological structure and function of the
Broads, in particular the past aquatic flora
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