Rivista e Edizione

AHEAD OF PRINT

Volume 15 (2022): Edizione 1 (May 2022)

Volume 14 (2021): Edizione 3 (December 2021)

Volume 14 (2021): Edizione 2 (September 2021)

Volume 14 (2021): Edizione 1 (May 2021)

Volume 13 (2020): Edizione 3 (December 2020)

Volume 13 (2020): Edizione 2 (September 2020)

Volume 13 (2020): Edizione 1 (May 2020)

Volume 12 (2019): Edizione 3 (December 2019)

Volume 12 (2019): Edizione 2 (September 2019)

Volume 12 (2019): Edizione 1 (May 2019)

Volume 11 (2018): Edizione 3 (December 2018)

Volume 11 (2018): Edizione 2 (November 2018)

Volume 11 (2018): Edizione 1 (January 2018)

Volume 10 (2017): Edizione 3 (December 2017)

Volume 10 (2017): Edizione 2 (November 2017)

Volume 10 (2017): Edizione 1 (January 2017)

Volume 9 (2016): Edizione 3 (December 2016)

Volume 9 (2016): Edizione 2 (November 2016)

Volume 9 (2016): Edizione 1 (January 2016)

Volume 8 (2015): Edizione 3 (December 2015)

Volume 8 (2015): Edizione 2 (November 2015)

Volume 8 (2015): Edizione 1 (January 2015)

Volume 7 (2014): Edizione 3 (December 2014)

Volume 7 (2014): Edizione 2 (November 2014)

Volume 7 (2014): Edizione 1 (January 2014)
MEDITERRANEAN LANDSCAPES, Guest Editors: Stefan Schindler and Linda Olsvig-Whittaker

Volume 6 (2013): Edizione 3 (December 2013)

Volume 6 (2013): Edizione 2 (December 2013)

Volume 6 (2013): Edizione 1 (January 2013)

Volume 5 (2012): Edizione 3 (December 2012)

Volume 5 (2012): Edizione 2 (November 2012)

Volume 5 (2012): Edizione 1 (January 2012)

Volume 4 (2011): Edizione 3 (August 2011)

Volume 4 (2011): Edizione 2 (April 2011)

Volume 4 (2011): Edizione 1 (January 2011)

Volume 3 (2010): Edizione 2 (December 2010)

Volume 3 (2010): Edizione 1 (June 2010)

Volume 2 (2009): Edizione 2 (December 2009)

Volume 2 (2009): Edizione 1 (June 2009)

Volume 1 (2008): Edizione 2 (December 2008)

Volume 1 (2008): Edizione 1 (June 2008)

Dettagli della rivista
Formato
Rivista
eISSN
1805-4196
Pubblicato per la prima volta
20 Jun 2008
Periodo di pubblicazione
3 volte all'anno
Lingue
Inglese

Cerca

Volume 8 (2015): Edizione 1 (January 2015)

Dettagli della rivista
Formato
Rivista
eISSN
1805-4196
Pubblicato per la prima volta
20 Jun 2008
Periodo di pubblicazione
3 volte all'anno
Lingue
Inglese

Cerca

5 Articoli
Accesso libero

Monitoring and analysis of nyamulagira volcano activity using modis data: case of the 2011-2012 eruption

Pubblicato online: 13 Aug 2015
Pagine: 5 - 21

Astratto

Abstract

In this paper we analyzed the 2011-2012 eruption of Nyamulagira volcano using MODIS Data. Eruptions have been occurring every 3–4 years throughout the last century. Satellite infrared data, collected by MODIS sensor to estimate pixels thermal anomaly of hot spots were analized, the radiance emitted at 3,959 and 12.02μm for each pixel and the thermal emissions at Nyamulagira feall into three distinct radiating regimes released during the 2011–2012 eruption. Initial activity was detected on 6 November, at 19:55 UTC, with a large thermal anomaly with 28 pixels approximately on the north flank of the volcano. The anomaly was limited to the north flank. The anomaly reached a maximum size of 1188 pixels in January 2012. The size and intensity of the anomaly rapidly diminished to first April 2012 were no more than 2 piixels indicate the end of eruption.

Keyword

  • Nyamuragira volcano
  • MODIS, Thermal anomalies
  • Pixel, Hot spot
  • Volcanic radiative power
  • Thermal regimes
  • Effusive trends
Accesso libero

Hedgerows Have a Barrier Effect and Channel Pollinator Movement in the Agricultural Landscape

Pubblicato online: 13 Aug 2015
Pagine: 22 - 31

Astratto

Abstract

Agricultural intensification and the subsequent fragmentation of semi-natural habitats severely restrict pollinator and pollen movement threatening both pollinator and plant species. Linear landscape elements such as hedgerows are planted for agricultural and conservation purposes to increase the resource availability and habitat connectivity supporting populations of beneficial organisms such as pollinators. However, hedgerows may have unexpected effects on plant and pollinator persistence by not just channeling pollinators and pollen along, but also restricting movement across the strip of habitat. Here, we tested how hedgerows influence pollinator movement and pollen flow. We used fluorescent dye particles as pollen analogues to track pollinator movement between potted cornflowers Centaurea cyanus along and across a hedgerow separating two meadows. The deposition of fluorescent dye was significantly higher along the hedgerow than across the hedgerow and into the meadow, despite comparable pollinator abundances. The differences in pollen transfer suggest that hedgerows can affect pollinator and pollen dispersal by channeling their movement and acting as a permeable barrier. We conclude that hedgerows in agricultural landscapes can increase the connectivity between otherwise isolated plant and pollinator populations (corridor function), but can have additional, and so far unknown barrier effects on pollination services. Functioning as a barrier, linear landscape elements can impede pollinator movement and dispersal, even for highly mobile species such as bees. These results should be considered in future management plans aiming to enhance the persistence of threatened pollinator and plant populations by restoring functional connectivity and to ensure sufficient crop pollination in the agricultural landscape.

Keywords

  • Fragmentation
  • Linear Landscape Elements
  • Functional connectivity
  • Corridor
  • Pollen flow
Accesso libero

Utilizing a Photo-Analysis Software for Content Identifying Method (CIM)

Pubblicato online: 13 Aug 2015
Pagine: 32 - 55

Astratto

Abstract

Content Identifying Methodology or (CIM) was developed to measure public preferences in order to reveal the common characteristics of landscapes and aspects of underlying perceptions including the individual's reactions to content and spatial configuration, therefore, it can assist with the identification of factors that influenced preference. Regarding the analysis of landscape photographs through CIM, there are several studies utilizing image analysis software, such as Adobe Photoshop, in order to identify the physical contents in the scenes. This study attempts to evaluate public’s ‘preferences for aesthetic qualities of pedestrian bridges in urban areas through a photo-questionnaire survey, in which respondents evaluated images of pedestrian bridges in urban areas. Two groups of images were evaluated as the most and least preferred scenes that concern the highest and lowest mean scores respectively. These two groups were analyzed by CIM and also evaluated based on the respondent’s description of each group to reveal the pattern of preferences and the factors that may affect them. Digimizer Software was employed to triangulate the two approaches and to determine the role of these factors on people’s preferences. This study attempts to introduce the useful software for image analysis which can measure the physical contents and also their spatial organization in the scenes. According to the findings, it is revealed that Digimizer could be a useful tool in CIM approaches through preference studies that utilizes photographs in place of the actual landscape in order to determine the most important factors in public preferences for pedestrian bridges in urban areas.

Keywords

  • Preference
  • Digimizer
  • Content Identifying Method
  • Physical Contents
Accesso libero

Fuel Wood Consumption and Species Degradation in South-Western Nigeria: The Ecological Relevance

Pubblicato online: 13 Aug 2015
Pagine: 56 - 68

Astratto

Abstract

The continuous dependence of man on fuel and service wood has resulted in serious degradation of the fragile forest ecosystem. Therefore, this study evaluated the sources and patterns of fuel wood and examined the rate of consumption in the study area. This was with the aim to assess the ecological implications of fuelwood consumption on species degradation. The study utilized both, primary and secondary data. Information was extracted from topographic map on the scale of 1: 50,000 and satellites imageries that cover the study area. Questionnaire administration, field observation and weight measurement of fuel wood were carried out. The results showed that the sources of fuel wood for domestic cooking were forest, nearby bush and abandoned farm while the sources of domestic energy were fuel wood (61.17%), charcoal (27%), kerosene (10%), electricity (1.33%) and gas (0.5%). Fuel wood for small scale industries were: forest (49.23%), farmland (34.62) and fallow land (16.15%). The trend of fuel wood consumption was on the high side from 1995 to 2011, it was 58% in 1995, 70% in 2000, 82% in 2005 and 92% in 2010 and 2011 respectively. Many valuable economic tree species such as Triplochiton scleroxylon, Nesogordonia papaverifera, and Cordia spp. are near their extinction. Animals such as antelope, wolf and fox are going into extinction while monkey, grasscutter, hare, rabbit were endemic in the study area. The study concluded that the patterns of fuel wood use and fuel wood saturation presents a great danger for biodiversity products and services.

Parole chiave

  • Ecological implication
  • fuelwood consumption
  • species degradation
  • sustainable environment
Accesso libero

Land Use/Cover Change at Infraz Watershed, Northwestren Ethiopia

Pubblicato online: 13 Aug 2015
Pagine: 69 - 83

Astratto

Abstract

Land cover is the physical and biological cover of the surface whereas land use covers the results of human activities for the exploitation of it. The land cover and landuse change is caused by both, natural and anthropogenic factors. The objective of this study was to detect land cover/use changes in Infraz Watershed. The study has used ArcGIS10 and ERDAS IMAGINE10, landsat images of 1973, 1986, 1995 and 2011 and socio-economic data to analyze land cover and landuse changes of Infraz watershed. The study has found that due to the population increase and improper agricultural activity bush and wetlands have declined where as farm and settlement lands expanded between the study years. About 1044 wetlands and 6338.7 ha of bush lands were lost and converted to cultivated and farm lands, grass lands and forest covers which were increased by 6685.3, 357.7 and 338.3 ha between the study periods respectively. There is an urgent need to limit the population growth rate and implementing land use policy in the Infraz watershed.

Keyword

  • Infraz watershed
  • land cover/use
  • population increase
  • landsat images
  • classification
5 Articoli
Accesso libero

Monitoring and analysis of nyamulagira volcano activity using modis data: case of the 2011-2012 eruption

Pubblicato online: 13 Aug 2015
Pagine: 5 - 21

Astratto

Abstract

In this paper we analyzed the 2011-2012 eruption of Nyamulagira volcano using MODIS Data. Eruptions have been occurring every 3–4 years throughout the last century. Satellite infrared data, collected by MODIS sensor to estimate pixels thermal anomaly of hot spots were analized, the radiance emitted at 3,959 and 12.02μm for each pixel and the thermal emissions at Nyamulagira feall into three distinct radiating regimes released during the 2011–2012 eruption. Initial activity was detected on 6 November, at 19:55 UTC, with a large thermal anomaly with 28 pixels approximately on the north flank of the volcano. The anomaly was limited to the north flank. The anomaly reached a maximum size of 1188 pixels in January 2012. The size and intensity of the anomaly rapidly diminished to first April 2012 were no more than 2 piixels indicate the end of eruption.

Keyword

  • Nyamuragira volcano
  • MODIS, Thermal anomalies
  • Pixel, Hot spot
  • Volcanic radiative power
  • Thermal regimes
  • Effusive trends
Accesso libero

Hedgerows Have a Barrier Effect and Channel Pollinator Movement in the Agricultural Landscape

Pubblicato online: 13 Aug 2015
Pagine: 22 - 31

Astratto

Abstract

Agricultural intensification and the subsequent fragmentation of semi-natural habitats severely restrict pollinator and pollen movement threatening both pollinator and plant species. Linear landscape elements such as hedgerows are planted for agricultural and conservation purposes to increase the resource availability and habitat connectivity supporting populations of beneficial organisms such as pollinators. However, hedgerows may have unexpected effects on plant and pollinator persistence by not just channeling pollinators and pollen along, but also restricting movement across the strip of habitat. Here, we tested how hedgerows influence pollinator movement and pollen flow. We used fluorescent dye particles as pollen analogues to track pollinator movement between potted cornflowers Centaurea cyanus along and across a hedgerow separating two meadows. The deposition of fluorescent dye was significantly higher along the hedgerow than across the hedgerow and into the meadow, despite comparable pollinator abundances. The differences in pollen transfer suggest that hedgerows can affect pollinator and pollen dispersal by channeling their movement and acting as a permeable barrier. We conclude that hedgerows in agricultural landscapes can increase the connectivity between otherwise isolated plant and pollinator populations (corridor function), but can have additional, and so far unknown barrier effects on pollination services. Functioning as a barrier, linear landscape elements can impede pollinator movement and dispersal, even for highly mobile species such as bees. These results should be considered in future management plans aiming to enhance the persistence of threatened pollinator and plant populations by restoring functional connectivity and to ensure sufficient crop pollination in the agricultural landscape.

Keywords

  • Fragmentation
  • Linear Landscape Elements
  • Functional connectivity
  • Corridor
  • Pollen flow
Accesso libero

Utilizing a Photo-Analysis Software for Content Identifying Method (CIM)

Pubblicato online: 13 Aug 2015
Pagine: 32 - 55

Astratto

Abstract

Content Identifying Methodology or (CIM) was developed to measure public preferences in order to reveal the common characteristics of landscapes and aspects of underlying perceptions including the individual's reactions to content and spatial configuration, therefore, it can assist with the identification of factors that influenced preference. Regarding the analysis of landscape photographs through CIM, there are several studies utilizing image analysis software, such as Adobe Photoshop, in order to identify the physical contents in the scenes. This study attempts to evaluate public’s ‘preferences for aesthetic qualities of pedestrian bridges in urban areas through a photo-questionnaire survey, in which respondents evaluated images of pedestrian bridges in urban areas. Two groups of images were evaluated as the most and least preferred scenes that concern the highest and lowest mean scores respectively. These two groups were analyzed by CIM and also evaluated based on the respondent’s description of each group to reveal the pattern of preferences and the factors that may affect them. Digimizer Software was employed to triangulate the two approaches and to determine the role of these factors on people’s preferences. This study attempts to introduce the useful software for image analysis which can measure the physical contents and also their spatial organization in the scenes. According to the findings, it is revealed that Digimizer could be a useful tool in CIM approaches through preference studies that utilizes photographs in place of the actual landscape in order to determine the most important factors in public preferences for pedestrian bridges in urban areas.

Keywords

  • Preference
  • Digimizer
  • Content Identifying Method
  • Physical Contents
Accesso libero

Fuel Wood Consumption and Species Degradation in South-Western Nigeria: The Ecological Relevance

Pubblicato online: 13 Aug 2015
Pagine: 56 - 68

Astratto

Abstract

The continuous dependence of man on fuel and service wood has resulted in serious degradation of the fragile forest ecosystem. Therefore, this study evaluated the sources and patterns of fuel wood and examined the rate of consumption in the study area. This was with the aim to assess the ecological implications of fuelwood consumption on species degradation. The study utilized both, primary and secondary data. Information was extracted from topographic map on the scale of 1: 50,000 and satellites imageries that cover the study area. Questionnaire administration, field observation and weight measurement of fuel wood were carried out. The results showed that the sources of fuel wood for domestic cooking were forest, nearby bush and abandoned farm while the sources of domestic energy were fuel wood (61.17%), charcoal (27%), kerosene (10%), electricity (1.33%) and gas (0.5%). Fuel wood for small scale industries were: forest (49.23%), farmland (34.62) and fallow land (16.15%). The trend of fuel wood consumption was on the high side from 1995 to 2011, it was 58% in 1995, 70% in 2000, 82% in 2005 and 92% in 2010 and 2011 respectively. Many valuable economic tree species such as Triplochiton scleroxylon, Nesogordonia papaverifera, and Cordia spp. are near their extinction. Animals such as antelope, wolf and fox are going into extinction while monkey, grasscutter, hare, rabbit were endemic in the study area. The study concluded that the patterns of fuel wood use and fuel wood saturation presents a great danger for biodiversity products and services.

Parole chiave

  • Ecological implication
  • fuelwood consumption
  • species degradation
  • sustainable environment
Accesso libero

Land Use/Cover Change at Infraz Watershed, Northwestren Ethiopia

Pubblicato online: 13 Aug 2015
Pagine: 69 - 83

Astratto

Abstract

Land cover is the physical and biological cover of the surface whereas land use covers the results of human activities for the exploitation of it. The land cover and landuse change is caused by both, natural and anthropogenic factors. The objective of this study was to detect land cover/use changes in Infraz Watershed. The study has used ArcGIS10 and ERDAS IMAGINE10, landsat images of 1973, 1986, 1995 and 2011 and socio-economic data to analyze land cover and landuse changes of Infraz watershed. The study has found that due to the population increase and improper agricultural activity bush and wetlands have declined where as farm and settlement lands expanded between the study years. About 1044 wetlands and 6338.7 ha of bush lands were lost and converted to cultivated and farm lands, grass lands and forest covers which were increased by 6685.3, 357.7 and 338.3 ha between the study periods respectively. There is an urgent need to limit the population growth rate and implementing land use policy in the Infraz watershed.

Keyword

  • Infraz watershed
  • land cover/use
  • population increase
  • landsat images
  • classification

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