3,197 research outputs found
Updates in the flora of the Maltese Islands (Central Mediterranean)
No full textDuring the last 5 years, this author has been involved in the research and exploration of the flora of the
Maltese islands in order to create and update the website http://www.maltawildplants.com. This paper
consists of several important discoveries of new populations of very rare or endangered floral species for
the Maltese Islands which were recorded during field surveys to collect material for this website. It also
includes the species Calendula bicolor Rafin., which is a new record for the Maltese islands.peer-reviewe
Flora Tristan Life Stories
No full textFlora Tristan is best known as a nineteenth century French social critic and reformer. Her writings can be seen as a precursor to Marxism and Feminism. Flora Tristan: Life Sories by Susan Grogan, investigates the life of Flora Tristan through an exploration of the way she represented herself in her own writings. The author also examines the portrayal of Flora Tristan in paintings and literature. Rather than adopting a chronological approach, the author surveys the personae of Flora Tristan through thematic chapters on her roles as author, socialist, traveller and "Mother of the Workers". She places Flora Tristan in the context of contemporary debates and ideas, adding to our understanding of the times in which Flora Tristan lived. Flora Tristan: Life Stories argues that Flora Tristan's self-representations were attempts to claim a role of authority and significance not open to women in the nineteenth century. This authoritative study also engages with attempts to re-evaluate the writing of biography and to explore the meaning of an individual life in historical context.Book Cover -- Title -- Copyright -- ContentsFlora Tristan is best known as a nineteenth century French social critic and reformer. Her writings can be seen as a precursor to Marxism and Feminism. Flora Tristan: Life Sories by Susan Grogan, investigates the life of Flora Tristan through an exploration of the way she represented herself in her own writings. The author also examines the portrayal of Flora Tristan in paintings and literature. Rather than adopting a chronological approach, the author surveys the personae of Flora Tristan through thematic chapters on her roles as author, socialist, traveller and "Mother of the Workers". She places Flora Tristan in the context of contemporary debates and ideas, adding to our understanding of the times in which Flora Tristan lived. Flora Tristan: Life Stories argues that Flora Tristan's self-representations were attempts to claim a role of authority and significance not open to women in the nineteenth century. This authoritative study also engages with attempts to re-evaluate the writing of biography and to explore the meaning of an individual life in historical context.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Molecular footprints of the Holocene retreat of dwarf birch in Britain
No full text© 2014 The Authors. Molecular Ecology Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited
A comparison of the moss floras of Chile and New Zealand
No full textChile and New Zealand share a common stock of 181 species of mosses in 94 genera and 34 families. This number counts for 23.3% of the Chilean and 34.6% of the New Zealand moss flora. If only species with austral distribution are taken into account, the number is reduced to 113 species in common, which is 14.5% of the Chilean and 21.6% of the New Zealand moss flora. This correlation is interpreted in terms of long distance dispersal resp. the common phytogeographical background of both countries as parts of the palaoaustral floristic region and compared with disjunct moss floras of other continents as well as the presently available molecular data
A study of the affects of Habitat fragmentation on the woodland edge microclimate and on the structure and composition of woodland ground flora
No full textA study of the affects of habitat fragmentation on the microclimate and ground flora at the edge of an area of secondary woodland was conducted. Vegetation was sampled in an array of 60 quadrats arranged in transects running parallel with the edge of the woodland and at increasing distances from it. Species abundance at each quadrat was measured using the Domin scale. Point quadrats were used to allow assessment of vegetation structure and canopy cover at each quadrat was described using a point centred quarter method. Environmental variables including illumination, P.A.R., soil temperature, air temperature, soil moisture, soil organic content and pH were measured at each quadrat. Data was analysed using a variety of univariate and multivariate statistics. Results indicated a microclimatic and vegetational transition zone' of approximately 10 metres in diameter at the northern boundary of Moorhouse Wood and adjacent habitats. This was indicated by; 1. Illumination, P A R., soil and ah temperature, soil moisture and soil organic content all underwent significant alterations over this distance and continued to change more gradually further into the wood. 2. Edge oriented patterns of variation were found in both canopy and ground floral community composition and in general, species with ecological preferences for disturbed or for warm and light conditions were increased in abundance at the edge of the woodland. Some evidence of invasion by non-woodland species was found but these did not appear to be colonising the woodland interior. 3. Ground vegetation structure was altered by proximity to the woodland edge. This was shown to be unrelated to most microclimatic variables and it is suggested that a high level of disturbance is more likely to be responsible for the decreased height of vegetation at the boundary. Comments are made concerning the significance of these findings and their importance in understanding the affects of habitat fragmentation on the woodland microclimate and ground flora
Juresian riparian birch woodlands: Carici reuterianae-Betuletum celtibericae as. nova.
No full textThe Portuguese areas of the Juresian Sector (sensu Rivas-Martínez et al., Itinera Geobotanica, 2002) include a considerable diversity of deciduous woodlands predominated by the Iberian birch (Betula celtiberica). In a recent study of the vegetation of the Peneda-Gerês mountain range (Honrado, Flora e Vegetação do Parque Nacional da Peneda-Gerês, 2003), six different birch-woodland types were recognised and classified according to both dynamic (climactic vs. secondary/ /seral formations) and synecologic (climatophilous vs. edapho-hygrophilous formations) characters. In the same study, riparian birch woodlands of the Juresian Sector were preliminarily described as a new association (Carici reuterianae-Betuletum celtibericae)
Juresian riparian birch woodlands: Carici reuterianae-Betuletum celtibericae as. nova.
No full textThe Portuguese areas of the Juresian Sector (sensu Rivas-Martínez et al., Itinera Geobotanica, 2002) include a considerable diversity of deciduous woodlands predominated by the Iberian birch (Betula celtiberica). In a recent study of the vegetation of the Peneda-Gerês mountain range (Honrado, Flora e Vegetação do Parque Nacional da Peneda-Gerês, 2003), six different birch-woodland types were recognised and classified according to both dynamic (climactic vs. secondary/ /seral formations) and synecologic (climatophilous vs. edapho-hygrophilous formations) characters. In the same study, riparian birch woodlands of the Juresian Sector were preliminarily described as a new association (Carici reuterianae-Betuletum celtibericae)
Defining indigenous plants: some problematic species from Norfolk Island
No full textDefining indigenous species may at first appear straight forward; most botanical texts provide similar definitions. The consistent requirement of such definitions is the lack of human intervention in the occurrence of the species within the area under consideration. Islands around the world have been invaded by plant species brought to their shores by humans. They are also places where self-introduced species can be continually arriving, as they have done for millennia. Scrutiny of the situation on Norfolk Island (1200 km east of Australia) finds that the distinction between indigenous and introduced taxa is sometimes unclear. There is also inconsistency regarding the acceptance of self-introduced species as indigenous. This paper explores these issues and notes that they are more important than idle botanical curiosity, because control of introduced (weed) species is a major area of activity in managing protected natural areas
The impact of management on the ground flora communities of some ancient woods in the wear valley, county Durham
No full text(i) The range of pH values under broadleaf plantations is more restricted than under different management types, this is restricted further under conifers.(ii) Loamy soils under plantations were more acidic than under different management regimes.(iii) Species distribution was found to be independent of aspect and slope, due to the narrow range of values for these variables.(iv) Woods which contained areas of both clayey and loamy soils were found to be floristically richer than those woods which had one type of soil present.(v) There is a reduction in species diversity under plantations, with conifer plantations having the lowest species diversity. Plantation forestry results in a monotonous sward of vegetation with little ecological interest.(vi) Woodlands which have a hands off management regime are fairly poor floristically, but appear natural and have some ecological value.(vii) Woods which are managed for conservation have the greatest diversity of species and have great ecological interest
A contribution to the Campylopus flora of Chile
No full textA key to the species of Campylopus known from Chile is given, completed by records of Campylopodioideae of the author in southern Chile. Campylopus acuminatus Mitt. var. kirkii (Mitt.) J.-P. Frahm is reported for the first time for Chile
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