166 research outputs found

    Photograph of gravestone of John Rowntree, Edward Rowntree and ?Rowntree, West Hobart, Tasmania

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    Photograph of gravestone of John Rowntree taken in the Quaker (Society of Friends) Burial Ground established in 1836 at Mellifont Street, West Hobart, Tasmania until it was closed in 1912. The gravestones have been moved to the edge of what is now the Friends' Park, a recreational park and children's playground. Inscription reads: 'John Rowntree, - Died ?th of the ?th Month ?. Aged 2? Years. Edw ? Rowntree died ? of 11th Month 18? Aged 82 ? Hanna? Rowntree - Died ?' Inscription very damaged

    The Journal of the Friends' Historical Society volume 1, no. 1

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    1. Foreword 2. Notes and Queries 3. The Handwriting of George Fox (illustrated) By Isaac Sharp, B.A. 4. Grangerised Books By The Editors 5. Our Recording Clerks: I. Ellis HookesBy Norman Penney 6. The Case of William Gibson (illustrated) By The Editor 7. Two Quotations in the London Y.M. Epistle, 1903 By The Editors 8. The Quaker Family of Owen I By Joseph J. Green 9. Letters of Wm. Dewsbury and John Whitehead By The Editors 10. Friends' Reference Library, Devonshire House 11. Book Notes By Norman Penney 12. List of Member

    Multiplex microsatellite PCR panels for the neotropical mangrove Rhizophora mangle: combining efforts towards a cost-effective and modifiable tool to better inform conservation and management

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    Better-informed mangrove conservation and management practices are needed as the ecosystem services provided by these intertidal forests continue to be threatened by increasing anthropogenic pressures and climate change. Multiple layers of knowledge are required to achieve this goal, including insights into population genetics of mangrove species. Understanding the importance of population-genetic insights to conservation, multiple research groups have developed microsatellite loci for the widespread, neotropical red mangrove, Rhizophora mangle. However, although a wealth of genetic markers exist, empirical research is limited in the number of these loci employed. Here, we designed two multiplex PCR panels that combine seven novel loci developed for this work and eight previously-developed loci from three research groups to generate 15-locus genotypes, more than twice the average number of loci used in previous research, in only two PCR. We demonstrated utility in R. mangle from four sites across ~2500 km near this speciesā€™ northern latitudinal limits, and that these multiplex panels were better able to delineate populations than data subsets with numbers of loci comparable to previous research. We focus our discussion on how this tool is a more-informative, efficient (both in terms of time and resources), and easily-modifiable alternative to address many pressing conservation and management issues, such as the generation of baseline genetic data for areas not yet studied, better defining management units, and monitoring genetic effects of restoration projects. We also provide a quick protocol that outlines each step in this procedure to facilitate the use of this tool by others

    The Journal of the Friends' Historical Society vol. 1 No. 3

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    1. Notices. 2. Notes and Queries. 3. First Publishers of Truth. 4. Edmund Peckover's Travels in North America and Barbados. 5. Quaker or Common Beggars. 6. County Tipperary Friends Records I. 7. The Quaker Family of Owen III. 8. Inscriptions in Friends' Burial Ground, Bowcroft, near Sheffield. 9. Notes on Friends in South of Scotland II. 10. Editors Proposals. 11. Samuel Bownas to James Wilson, 1751. 12. Friends' Library, Philadelphia, Pennsylvania. 13. Friends' Historical Society of America. 14. Friends' Reference Library. 15. Awbrey of Brecknockshire. 16. Paragraph of the Will of John Rutty, 1770. 17. Third List of Members. 18. Index to Volume 1

    Evidence for the genetic similarity rule at an expanding mangrove range limit

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    Premise Host-plant genetic variation can shape associated communities of organisms. These community-genetic effects include (1) genetically similar hosts harboring similar associated communities (i.e., the genetic similarity rule) and (2) host-plant heterozygosity increasing associated community diversity. Community-genetic effects are predicted to be less prominent in plant systems with limited genetic variation, such as those at distributional range limits. Yet, empirical evidence from such systems is limited. Methods We sampled a natural population of a mangrove foundation species (Avicennia germinans) at an expanding range limit in Florida, USA. We measured genetic variation within and among 40 host trees with 24 nuclear microsatellite loci and characterized their foliar endophytic fungal communities with internal transcribed spacer (ITS1) gene amplicon sequencing. We evaluated relationships among host-tree genetic variation, host-tree spatial location, and the associated fungal communities. Results Genetic diversity was low across all host trees (mean: 2.6 alleles per locus) and associated fungal communities were relatively homogeneous (five sequence variants represented 78% of all reads). We found (1) genetically similar host trees harbored similar fungal communities, with no detectable effect of interhost geographic distance. (2) Host-tree heterozygosity had no detectable effect, while host-tree absolute spatial location affected community alpha diversity. Conclusions This research supports the genetic similarity rule within a range limit population and helps broaden the current scope of community genetics theory by demonstrating that community-genetic effects can occur even at expanding distributional limits where host-plant genetic variation may be limited. Our findings also provide the first documentation of community-genetic effects in a natural mangrove system

    Blind trading: A literature review of research addressing the welfare of Ball pythons in the exotic pet trade

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    Extensive numbers of Ball pythons are caught, bred, traded and subsequently kept in captivity across the world as part of the exotic pet industry. Despite their widespread availability as pets, relatively little is known about the potential welfare challenges affecting them. We reviewed the literature for research focused on the health and welfare of Ball pythons in the international pet trade. From a total of 88 articles returned from the search criteria, our analysis showed that very few actually focused on trade (10%) or animal welfare (17%). Instead, the majority (64%) of articles focused on veterinary science. There was a considerable bias towards physical health, with most studies neglecting the four other domains of animal welfare (behaviour, nutrition, environment and mental health). Furthermore, very few studies considered Ball pythons prior to resulting pet ownership, during wild capture and transportation or captive breeding operations. Our review demonstrates that our current understanding of welfare for Ball pythons traded as exotic pets is limited. We recommend that future research should focus on aspects of the industry that are currently overlooked, including the potential consequences of genetic selection during captive-breeding and the conditions provided for snakes prior to and during international transportation

    Mating system variation in neotropical black mangrove, Avicennia germinans, at three spatial scales towards an expanding northern distributional limit

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    Climate-driven range expansion of ecosystem-defining foundation species can have wide-reaching ecological consequences. Expansion may also result in mating system changes in these foundation species because of the ecological characteristics of range margins, such as greater conspecific isolation and reduced pollinator availability. It is important to understand how mating systems may change during expansion due to their direct influence on intraspecific genetic and demographic dynamics. Here, we used 12 microsatellite loci to genotype progeny arrays of the neotropical black mangrove (Avicennia germinans) at six collection sites (n = 23 maternal trees; 1,612 genotyped propagules) along a latitudinal gradient towards a northern distributional limit on the Atlantic coast of Florida, USA (27.56ā€“30.01oN), where mangroves have expanded into salt marsh over the past several decades. We assessed mating system variation at three spatial scales. First, at the species-distribution level, published outcrossing rates for tropical conspecifics were more than two times higher than those for subtropical Florida A. germinans, consistent with reductions in pollinator diversity and in mangrove abundance with latitude. Second, at the population level, Florida outcrossing rates did not systematically decline towards the northern range limit, but instead, a more open pollen-dispersal neighbourhood at the transition from mangrove to salt marsh dominance may elevate outcrossing until conspecific abundances become too low towards the range limit. Third, at the individual level, outcrossing increased as conspecific cover increased at the Florida range margin, consistent with density-dependent plastic shifts in mating system. These findings suggest that ecological structure influences the A. germinans mating system at varying spatial scales. Further research needs to evaluate the effect of A. germinans mating system variation on the survival and fitness of offspring and on the extent of population-level local adaptation at expanding distributional limits

    Hurricanes overcome migration lag and shape intraspecific genetic variation beyond a poleward mangrove range limit

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    Expansion of many tree species lags behind climateā€change projections. Extreme storms can rapidly overcome this lag, especially for coastal species, but how will stormā€driven expansion shape intraspecific genetic variation? Do storms provide recruits only from the nearest sources, or from more distant sources? Answers to these questions have ecological and evolutionary implications, but empirical evidence is absent from the literature. In 2017, Hurricane Irma provided an opportunity to address this knowledge gap at the northern range limit of the neotropical black mangrove (Avicennia germinans ) on the Atlantic coast of Florida, USA. We observed massive postā€hurricane increases in beachā€stranded A. germinans propagules at, and past, this speciesā€™ presentā€day range margin when compared to a previouslyā€surveyed, nonā€hurricane year. Yet, propagule dispersal does not guarantee subsequent establishment and reproductive success (i.e., effective dispersal). We also evaluated prior effective dispersal along this coastline with isolated A. germinans trees identified beyond the most northern established population. We used 12 nuclear microsatellite loci to genotype 896 hurricaneā€driven drift propagules from nine sites and 10 isolated trees from four sites, determined their sources of origin, and estimated dispersal distances. Almost all drift propagules and all isolated trees came from the nearest sources. This research suggests that hurricanes are a prerequisite for poleward range expansion of a coastal tree species and that storms can shape the expanding gene pool by providing almost exclusively rangeā€margin genotypes. These insights and empirical estimates of hurricaneā€driven dispersal distances should improve our ability to forecast distributional shifts of coastal species

    Cell-type-specific long-range looping interactions identify distant regulatory elements of the CFTR gene

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    Identification of regulatory elements and their target genes is complicated by the fact that regulatory elements can act over large genomic distances. Identification of long-range acting elements is particularly important in the case of disease genes as mutations in these elements can result in human disease. It is becoming increasingly clear that long-range control of gene expression is facilitated by chromatin looping interactions. These interactions can be detected by chromosome conformation capture (3C). Here, we employed 3C as a discovery tool for identification of long-range regulatory elements that control the cystic fibrosis transmembrane conductance regulator gene, CFTR. We identified four elements in a 460-kb region around the locus that loop specifically to the CFTR promoter exclusively in CFTR expressing cells. The elements are located 20 and 80 kb upstream; and 109 and 203 kb downstream of the CFTR promoter. These elements contain DNase I hypersensitive sites and histone modification patterns characteristic of enhancers. The elements also interact with each other and the latter two activate the CFTR promoter synergistically in reporter assays. Our results reveal novel long-range acting elements that control expression of CFTR and suggest that 3C-based approaches can be used for discovery of novel regulatory elements
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