21 research outputs found
Pheno-anomalies of sub-alpine Vaccinium heaths in response to climatic variations
No full textA phenological survey on Vaccinium heaths was repeated thirty years after the first observations, in the Northern
Apennines (Italy). In line with the sampling method adopted in the earliest phases of the study, the phenological
monitoring was undertaken in the same sites, located above the tree line between 1600 and 1800 m asl.
The phenology of each plant species was recorded in order to single out the flowering patterns of the plant communities
and their variations. In the years with average weather conditions, flowerings begin at the end of May,
after the melting of the last spring snow, and finish in September, showing a bimodal pattern. The first blooming
peak occurs in mid June and the second in mid July, in coincidence with the annual maximum temperatures. The
first peak is due to the dwarf shrubs and to other species typical of the Vaccinium heaths, while the second is due
to herbs with a wider ecology.
Among the years on study, we found that 1984 and 2012 diverged from the aforementioned pattern, in that flowerings
showed strong pheno-anomalies and a lower phenological diversity. In 1984, a marked delay of the blooming
start (1 month) and of the first peak (3 weeks) were observed, while the second peak and the flowering end were
normal: the delay was due to a very cold and snowy spring in 1984. On the contrary, 2012 was characterized by the
disappearance of the second flowering peak and by a dramatic advance of the blooming end: it is worth mentioning
that summer 2012 was exceptionally dry, with temperatures above the average. In summary, while the very cold
spring 1984 led simply to an initial shift and then to a compaction of the blooming rhythms, the xero-thermal
stress of the summer 2012 caused a deep variation of the symphenological pattern and a fail of sexual reproduction
in several late flowering species. Given that xero-thermal stress occurred often in the last decades, some sensible
species, flowering in mid summer, could have undergone a reduction in seed production and could have therefore
be disadvantaged in turn-over. This hypothesis is consistent with the results on vegetation changes: in fact, the
comparison of the actual vegetation with the historical observations in the same sites, shows a reduction of herb
(Hemicryptophytes) diversity and cover in time. It is noteworthy that many of the declining species flower in the
driest and hottest weeks of the year.
In a climate-warming scenario, the low extension of these sub-alpine islands of the Apennines leads to a high
extinction risk of the most sensible species. So, the monitoring of this vulnerable vegetation type seems necessary
in order to detect the current trends and should be continued in the future
Marsilea quadrifolia L. in: Schede per una Lista Rossa dellaFlora vascolare e crittogamica Italiana
No full textLa scheda per una Lista Rossa della Flora vascolare e crittogamica Italiana è relativa a Marsilea quadrifolia L. (Marsileaceae) pteridofita acquatica inserita negli allegati II e IV della Direttiva Habitat 92/43 CEE e nell’allegato I della Convenzione di Berna. Sono fornite informazioni sulla descrizione morfologica, sulla biologia, sulla distribuzione in Italia, sulle minacce e sui Criteri IUCN applicati per l’inserimento di M. quadrifolia in una delle categorie di rischio IUCN (2001). Vengono altresì indicate le strategie e le azioni di conservazione
Why are central radio relics so rare?
No full textIn this paper, we address the question of why cluster radio relics that are connected to shock acceleration, so-called radio gischt relics, have preferentially been found in the outskirts of galaxy clusters. By identifying merger shock waves in cosmological grid simulations, we explore several prescriptions for relating the energy dissipated in shocks to the energy emitted in the radio band. None of the investigated models produces detectable radio relics within 100-200kpc from the cluster centre. All models cause >50per cent of the detectable relic emission at projected distances >800kpc. Central radio relics caused by shocks that propagate along the line of sight are rare events for simple geometrical reasons, and they have a low surface brightness making them elusive for current instruments. Our simulations show that the radial distribution of observed relics can be explained by the radial trend of dissipated kinetic energy in shocks, which increases with distance from the cluster centre up until half of the virial radius. © 2012 The Author Monthly Notices of the Royal Astronomical Society © 2012 RAS
Compelled Unionism in the Private Sector After Janus: Why Unions Should Not Profit from Dissenting Employees
No full textThis Note examines the impact of the 2018 landmark labor law case Janus v. AFSCME. Janus held it unconstitutional under the First Amendment to require public sector employees to pay fees to a union to which they are not a member. The Supreme Court based their decision on the idea that compelling public employees to subsidize union speech to which they disagreed violated their free speech rights. The author argues that the Court’s holding in Janus should be extended to protect the free speech rights of private sector employees through a finding of state action in the private unionized workplace
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Compelled Unionism in the Private Sector After Janus: Why Unions Should Not Profit from Dissenting Employees
No full textThis Note examines the impact of the 2018 landmark labor law case Janus v. AFSCME. Janus held it unconstitutional under the First Amendment to require public sector employees to pay fees to a union to which they are not a member. The Supreme Court based their decision on the idea that compelling public employees to subsidize union speech to which they disagreed violated their free speech rights. The author argues that the Court’s holding in Janus should be extended to protect the free speech rights of private sector employees through a finding of state action in the private unionized workplace
Evaporitic Karst and Caves of Northern Apennines. Nomination Dossier for Inscription on the UNESCO Natural World Heritage List
No full textDossier tecnico di candidatura dei fenomeni carsici nelle evaporiti emiliano-romagnole a World Heritage UNESC
Evaporitic Karst and Caves of Northern Apennines. Nomination Dossier for Inscription on the UNESCO Natural World Heritage List
No full textCare Among Migraine Patients in a Commercially Insured Population
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Real-World Evaluation of Direct and Indirect Economic Burden Among Endometriosis Patients in the United States
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Provide enhanced content for this
article
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publication and would like to provide additional enhanced content for your
article then please contact [email protected].
The journal offers a range of
additional features designed to increase visibility and readership. All
features will be thoroughly peer reviewed to ensure the content is of the
highest scientific standard and all features are marked as ‘peer reviewed’ to
ensure readers are aware that the content has been reviewed to the same level
as the articles they are being presented alongside. Moreover, all sponsorship
and disclosure information is included to provide complete transparency and
adherence to good publication practices. This ensures that however the content
is reached the reader has a full understanding of its origin. No fees are
charged for hosting additional open access content.
Other enhanced features include,
but are not limited to:
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