Search results for "diversity"
showing 10 items of 3950 documents
Future supply of boreal forest ecosystem services is driven by management rather than by climate change
2022
Forests provide a wide variety of ecosystem services (ES) to society. The boreal biome is experiencing the highest rates of warming on the planet and increasing demand for forest products. To foresee how to maximize the adaptation of boreal forests to future warmer conditions and growing demands of forest products, we need a better understanding of the relative importance of forest management and climate change on the supply of ecosystem services. Here, using Finland as a boreal forest case study, we assessed the potential supply of a wide range of ES (timber, bilberry, cowberry, mushrooms, carbon storage, scenic beauty, species habitat availability and deadwood) given seven management regi…
More wood but less biodiversity in forests in Finland: a historical evaluation
2022
National forest inventories (NFI) in Finland provide empirical evidence for a marked increase in tree growth, total forest area, and total timber volume over the past century. Meanwhile, the assessments of threatened forest species and habitats indicate continuous degradation of biodiversity in Finnish forests. To shed light on this seeming paradox, we summarized the temporal patterns of forest characteristics (indicators) that have major influence on biodiversity, comparing the structure of current Finnish forests with natural and historical references. Using a variety of data sources, we estimated the proportion of area of old-growth forest and of deciduous-dominated forests, the density …
Using fractal dimensions for characterizing intra-urban diversity : the example of Brussels
2003
International audience; The objective of this paper is to compare fractal-based parameters calculated by different fractal methods for urban built-up areas and to link the observed spatial variations to variables commonly used in urban geography, urban economics, or land-use planning. Computations are performed on Brussels, Belgium. Two fractal methods (correlation and dilation) are systematically applied for evaluating the fractal dimension of built-up surfaces; correlation is used to evaluate the fractal dimension of the borders (lines). Analyses show that while fractal dimension is ideal for distinguishing the morphology of Brussels, each estimation technique leads to slightly different …
Approche d'un territoire de montagne : occupations humaines et contexte pédo-sédimentaire des versants du col du Petit-Saint-Bernard, de la Préhistoi…
2014
As part of a multi-year programme, survey campaigns have been carried out on both slopes of the Petit-Saint-Bernard pass (2188 m, western Alps), at an altitude of between 750 and 3000 m. The method employed abandons ground-based surveying in favour of multiple manual surveys carried out on selected topographic contexts down to the base of the Holocene fill. The results obtained document the longterm development of the pedo-sedimentary dynamic and the occupation of the different altitude stages. The significance of the archaeological data collected is discussed in relation to the state of knowledge in a comparison area including the neighbouring valleys of the western Alps, to existing settl…
Validation and application of a PCR primer set to quantify fungal communities in the soil environment by real-time quantitative PCR
2011
Fungi constitute an important group in soil biological diversity and functioning. However, characterization and knowledge of fungal communities is hampered because few primer sets are available to quantify fungal abundance by real-time quantitative PCR (real-time Q-PCR). The aim in this study was to quantify fungal abundance in soils by incorporating, into a real-time Q-PCR using the SYBRGreen (R) method, a primer set already used to study the genetic structure of soil fungal communities. To satisfy the real-time Q-PCR requirements to enhance the accuracy and reproducibility of the detection technique, this study focused on the 18S rRNA gene conserved regions. These regions are little affec…
The current state of knowledge of fungal diversity in Sicily (Southern Italy)
2007
The paper deal with the status of fungal biodiversity in Sicily. 1500 taxa, growing in different types of vegetation, are distributed in the nine provinces of the region. In this contribution a preliminary list of rare and infrequent species is also provided.
The current state of knowledge of fungal diversity in Sicily
2005
Current knowledge of fungal diversity in Sicily is reported based on historical data and recently field records. A preliminary list of rare and infrequent fungal species is also provided.
Professional identity among student teachers of physical education : the role of physicality
2019
In this study, we investigate the role of physicality in the professional identities of physical education (PE) student teachers. Twenty PE student teachers participated in semi-structured interviews during their final teaching practice. Data were analysed using qualitative thematic analysis (Braun and Clarke 2006) and typologies (Patton 2002). The results showed substantial diversity in the student teachers’ conceptions of physicality and the ways these conceptions were embedded in their developing professional identities. The results also brought to light criticism directed at traditional notions of the body and physicality in PE and PE teacher education (PETE). We suggest that conception…
Increasing human environmental footprint does not lead to biotic homogenization of forest bird communities in northern USA
2023
Studies have shown negative impacts of increased human pressures on biodiversity at local (alpha-diversity) and regional (gamma-diversity) scales. However, the diversity between local sites (beta-diversity) has received less attention. This is an important shortcoming since beta- diversity acts as a linkage between the local and regional scales. Decreased beta- diversity means that local sites lose their distinctiveness, becoming more similar to each other. This process is known as biotic homogenization. However, the mechanisms causing biotic homogenization have not been fully studied nor its impacts on different facets of biodiversity. We examined if land- use change due to human actions c…
Cleaning mums and brave policemen: gender representation and gender-inclusive language in EFL teaching materials in Lithuania
2019
Socialinės lyties kalbinės raiškos ir įvaizdžio kūrimo aspektai anglų kalbos (kaip svetimosios ar antrosios) vadovėliuose yra sulaukę nemažai tyrėjų dėmesio, tačiau lyties raiška Lietuvoje leistuose anglų kalbos vadovėliuose iki šiol analizuota sporadiškai (Brusokaitė, Verikaitė-Gaigalienė 2015), o tyrimų, skirtų ne vadovėliams, bet kitoms mokymo priemonėms, iki šiol beveik neatlikta. Šiame straipsnyje kiekybiniu (pasitelkiant tekstynų analizės įrankius) ir kokybiniu (remiantis turinio analize) būdu analizuojamos socialinės lyties vaizdavimo tendencijos keturiose – dviejose pratybų ir dviejose testų – anglų kalbos (kaip svetimosios) mokymo priemonėse, išleistose 2005–2017 m. Lietuvoje. Remi…