Juniperus navicularis - a study of Portuguese population structure and fitness

Juniperus navicularis Gand. is a dioecious endemic conifer that constitutes the understory of seaside pine forests in Portugal, areas currently threatened by increasing urban expansion. The aim of this study is to assess the conservation status of previously known populations of this species located on its core area of distribution. The study was performed in south-west coast of Portugal. Three populations varying in size and pine density were analyzed. Number of individuals, population density, spatial distribution and individual characteristics of junipers were estimated. Female cone, seed characteristics and seed viability were also evaluated. Results suggest that J. navicularis populations are vulnerable because seminal recruitment is scarce, what may lead to a reduction of genetic variability due solely to vegetative propagation. This vulnerability seems to be strongly determined by climatic constraints toward increasing aridity. Ratio between male and female shrubs did not differ from 1:1 in any population. Deviations from 1:1 between mature and non-mature plants were found in all populations, denoting population ageing. Very low seed viability was observed. A major part of described Juniperus navicularis populations have disappeared through direct habitat loss to urban development, loss of fitness in drier and warmer locations and low seed viability. This study is the first to address J. navicularis conservation, and represents a valuable first step toward this species preservation. 

Documentos y escritos

70 p.

Sketches of the judicial history of Massachusetts from 1630 to the revolution in 1775 /

Pages 356-357 lacking in microfiche ed.

Medford in the Revolution : military history of Medford, Massachusetts, 1765-1783 : also list of soldiers and civil officers, with genealogical and biographical notes /

Mode of access: Internet.

Tales of the revolution; being rare and remarkable passages of the history of the war of 1775.

Mode of access: Internet.

"Monseigneur, pardonnez-moi parce que j'ai péché" : la régulation de la dissidence au sein du clergé canadien, au moment de l'invasion américaine de 1775-1776

Cet ouvrage porte sur la réaction du clergé canadien face à l’invasion américaine de 1775-1776. Alors que l’historiographie considère généralement que les prêtres de la colonie restèrent fidèles au gouvernement britannique à cette occasion, trois curés se détachèrent au contraire de cette image de loyalisme : Eustache Chartier de Lotbinière (1716-1785), Pierre-René Floquet (1716-1782) ainsi que Pierre Huet de La Valinière (1732-1806). Soupçonnés par les autorités ecclésiastiques et coloniales d’entrenir des sympathies pour les révolutionnaires américains, ces hommes furent frappés par diverses sanctions, affectant durablement le déroulement de leur carrière.

The history of the French revolution.

Mode of access: Internet.

The history of the French Revolution /

Translation of: Histoire de la révolution française.

History of the French Revolution, and of the wars resulting from that memorable event.

Mode of access: Internet.

The life of James Otis, of Massachusetts: containing also, notices of some contemporary characters and events, from the year 1760 to 1775.

Mode of access: Internet.

The history of Massachusetts ...

Vol. 3 is 4th edition and lacks imprint date.

History of Massachusetts ... /

Vol. 2 published by Wells and Lilly; v. 3, by the author.

The history of the French revolution.

Chronology of the French revolution [1789-1799]: v. 1, p. [xvii]-xxxii.

The history of the French revolution /

Chronology of the French revolution [1789-1799]: v. 1, p. [v]-xvi.

The history of the French revolution /

Translation of: Histoire de la révolution française.