On the presence of Narcissus scaberulus Henriq. (Amaryllidaceae) in western Andalusia (Spain). Na... more On the presence of Narcissus scaberulus Henriq. (Amaryllidaceae) in western Andalusia (Spain). Narcissus scaberulus Henriq. is recorded for the first time in western Andalusia, specifically from the province of Huelva.
The dehesa is a traditional agrosilvopastoral ecosystem characterized by a savanna-like structure... more The dehesa is a traditional agrosilvopastoral ecosystem characterized by a savanna-like structure. It has been in decline since the middle of the last century, in particular in agricultural environments where it has been relegated to isolated forests. This paper presents a study into the reduction over the past 50 years. One of the main causes of this decline has been identified as xylophagous insects, specifically the wood borer Cerambyx welensii Kuster (Coleoptera: Cerambycidae). Based on estimations in both the population size, using Jolly Seber models, and the level of tree injury, using a single-index model, the study investigates the role the insect has played in the decline of the dehesa. Surface area loss was found to be greater than 50%, while canopy cover has diminished linearly over the period studied, with the risk of disappearance of the woodland increasing in the same magnitude as borer population density. The highest wood borer population densities observed correspond...
Habitat loss and fragmentation are considered some the main threats to biodiversity. Original for... more Habitat loss and fragmentation are considered some the main threats to biodiversity. Original forests have suffered an accentuated fragmentation and agricultural homogenization, leaving only some areas of natural vegetation, relegated to strongly anthropized disconnected patches (island forests, IFs) in a hostile matrix. These patches of original vegetation could be the key for the design and management of ecological corridors to promote species migration, an essential strategy for meeting the consequences of Global Change. This study proposes a comparative analysis of the fragmentation and connectivity of IFs of Quercus in two typically Mediterranean areas of predominantly agricultural use: the Guadalquivir valley (Spain) and the Apulia region (Italy). A retrospective comparison is also carried out in the Guadalquivir valley. The aim is to develop an objective new methodology to locate the patches of most interest using quantitative and qualitative data. Reference cartography of cu...
Platanus is a major cause of pollen allergy in many Spanish cities. The present paper reports an ... more Platanus is a major cause of pollen allergy in many Spanish cities. The present paper reports an analysis of Platanus pollen season throughout the Andalusia region (southern Spain), which has among the highest pollen counts and the highest incidence of Platanus-related allergies in Europe. The main aim was to analyze pollen season trends from 1992 to 2010 in Andalusia; models were also constructed to forecast the start of the season. Daily pollen counts were recorded using Hirst-type volumetric sporetraps. Pollen season start-dates were very similar at all sites, usually occurring in March. The pollen season was delayed over the study period. The Pollen-season duration and Pollen index generally increased throughout the study period. The starting date for temperature accumulation was around the 10th February, although the threshold temperatures varied by site. The regional model for Andalusia failed to provide sufficiently accurate results compared with sub-regional or local models. For modeling purposes, three sub-regions are recommended: Inland, East Coast and West Coast.
Potential pollen production, viability and germination were studied in the most important species... more Potential pollen production, viability and germination were studied in the most important species of Quercus in the mountains of Có rdoba to determine the contribution of each species to the total amount of airborne pollen. The results were compared over two consecutive years with different rainfall patterns. The viability of pollen grains was determined at anther opening, and during the pollination period, in order to determine potential pollination capacity. Results indicated that there were differences in the number of pollen grains produced by stamen in the four species. Equally, there were differences in the number of flowers among the species, being Q. suber the species with higher number of catkins groups and flowers per individual tree. Total pollen production per tree can be summarized in the following proportion: 1: 3: 3: 6 (Q. coccifera, Q. ilex ssp. ballota, Q. faginea and Q. suber). Potential pollen viability was estimated using the Fluorochromatic Reaction (FCR) and a germination assay. The results have shown that Quercus potential pollen viability is high and declines slowly with time. Q. coccifera was the species with the highest percentage of germination, with Q. suber being the lowest.
(1) Biodiversity, sustainable development and nature conservation are fundamental issues nowadays... more (1) Biodiversity, sustainable development and nature conservation are fundamental issues nowadays. All companies, administrations, governments and international organisations take these issues into consideration. Sustainable forest management always requires a compromise between profitability and conservation and in this fragile equilibrium, forest certification plays a key scheme. This sustainable management is of great importance in the European Union (EU), with the Forest Stewardship Council playing a fundamental role in forest certification. This certification forms the basis of the ecosystem conservation and improvement strategy in Ence, Energía y Celulosa, the leading company dedicated to the production of eucalyptus in Spain; (2) A three-phase protocol (identification of High Conservation Values, assessment of conservation areas and monitoring program), has been developed, providing clear, objective criteria, particularly concerning FSC (Forest Stewardship Council) Principle 9, the primary goal being the development and application of these objective criteria in the Ence conservation areas in the province of Huelva (Spain). One of the main criteria for habitat classification was correspondence with the habitats listed in Annex I of the Habitats Directive. The compatibility between forest exploitation management and conservation proposed by the Natura 2000 network encouraged us to use this methodology for the identification, classification and assessment of High Conservation Values considered in FSC forest certification: Principle 9; (3) The study encompasses 183 forest management units covering 52,022 ha, with a total of 11,847.45 ha being identified as High Conservation Value Areas. Through the identification and assessment of the conservation areas, the described methodology played a crucial role in demonstrating the positive impact of Ence's certified forest management on the conservation of biological diversity; (4) This study demonstrates that an objective and reliable identification, assessment and monitoring methodology, with a proven high degree of accuracy in the location and characterisation of interesting and representative habitats in the region, can be implemented. Due to its objectivity, this strategy can be easily applied to other European sustainable forest management sites and possibly to other countries outside the EU.
Boletin De La Sociedad Andaluza De Entomologia, 2012
Se cita por primera vez el endemismo ibérico Chondrostega vandalicia (Millière, 1865) en el Parqu... more Se cita por primera vez el endemismo ibérico Chondrostega vandalicia (Millière, 1865) en el Parque Natural Sierra de las Nieves, provincia de Málaga. Este hallazgo supone su distribución más meridional y la mayor altitud registrada (1.700 m. aprox.).
& Key message Composite logistic regression models simulating the potential effect of global clim... more & Key message Composite logistic regression models simulating the potential effect of global climate change on forests dynamics in the southern Iberian Peninsula identify Holm oak [Quercus ilex subsp. ballota (Desf.) Samp.] and Aleppo pine (Pinus halepensis Mill.) as the chief beneficiaries of the anticipated environmental shifts, whereas other oak species and conifers suffer a decline. & Context The ten most important tree species (five oaks and five conifers) in Southern Spain were selected for the study. The study area, corresponding to the region of Andalusia, is located in an interesting position between Central European and North African climates. The territory also exhibits the most extreme patterns of rainfall in the Iberian Peninsula. & Aims This study aims to model the potential distribution of the ten species in response to climate change, in several time periods, including the present and two future twenty-first century dates. & Methods The potential distributions within the different scenarios were simulated using logistic regression techniques based on a set of 19 climate variables from the WorldClim 1.4 project. The scenarios were drawn from the RCP 2.6 and 6.0 in the CCSM4 Global Circulation Model. The resolution of the output maps was 30 arc-seconds. & Results The simulation predicted increased distribution areas for Q. ilex and P. halepensis under the four future scenarios as compared to present. The eight remaining taxa suffered a severe retraction in potential distribution. & Conclusion Global climate change is likely to have a significant impact on forest dynamics in southern Spain. Only two species would benefit to the detriment of the others. Logistic Regression is identified as a robust method for carrying out management and conservation programmes.
manninen, h. e., Bäck, J., sihto-nissilä, s.-l., huffman, J. a., Pessi, a.-m., hiltunen, v., aalt... more manninen, h. e., Bäck, J., sihto-nissilä, s.-l., huffman, J. a., Pessi, a.-m., hiltunen, v., aalto, P. P., hidalgo, P. J., hari, P., saarto, a., : Patterns in airborne pollen and other primary biological aerosol particles (PBaP), and their contribution to aerosol mass and number in a boreal forest. Boreal Env. We studied variation in concentrations of airborne pollen and other particles of biological origin in a boreal forest in Finland during [2003][2004]. The highest concentrations of pollen were observed in late spring and early summer, whereas the peak concentrations of other particles of biological origin (including e.g. fungal spores) occurred in August-September. Although the patterns in concentrations in 2003 and 2004 were similar, the concentration levels were significantly different between the years. The contribution of pollen and other particles of biological origin led to an increase in the measured particulate matter (PM) mass during the pollen season (mass of pollen and other particles of biological origin 5.9 and 0.4 µg m -3 , respectively, in respect to PM total mass of 9.9 µg m -3 ) but the effect on total particle number was negligible. The other particles of biological origin constituted the largest fraction of measured primary biological aerosol particle (PBAP) numbers (~99%), whereas pollen showed a higher relative mass fraction (~97%) of PBAP. These results underline the important contribution of PBAP to coarse atmospheric particle mass providing up to 65% of the total mass during the peak pollen season.
Pollen monitoring is of great importance for the prevention of allergy. As this activity is still... more Pollen monitoring is of great importance for the prevention of allergy. As this activity is still largely carried out by humans, there is an increasing interest in the automation of pollen monitoring. The goal is to reduce monitoring time in order to plan more efficient treatments. In this context, an original device based on computer vision is developed. The goal of such a system is to provide accurate measurement of pollen concentration. This information can be used as well by palynologists, clinicians or by a forecast system to predict pollen dispersion. The system is composed of two modules: pollen grain extraction and pollen grain recognition. In the first module, the pollen grains are observed in light microscopy and are extracted automatically from a microscopic slide dyed with fuchsin and digitised in 3D. The colour segmentation techniques implemented on a hardware architecture are presented. In the second module, the pollen grains are analysed for recognition. To accomplish recognition, it is necessary to work on 3D images and to use deep palynological knowledge. This knowledge describes the pollen types according to their main visible characteristerics and to those which are important for recognition. Some pollen structures are identified, like the pore with annulus in Poaceae, the reticulum in Olea and similar pollen types or the cytoplasm in Cupressaceae. Preliminary results show correct recognition of some pollen types, like Urticaceae or Poaceae, and some groups of pollen types, like reticulate group.
Page 1. Israel Journal of Plant Sciences Vol 49 2001 pp. 41^7 Catkin frost damage in Mediterranea... more Page 1. Israel Journal of Plant Sciences Vol 49 2001 pp. 41^7 Catkin frost damage in Mediterranean cork-oak {Quercus súber L.) Herminia García-Mozo,* Pablo J. Hidalgo, Carmen Galán, Maria Teresa Gómez-Casero, and ...
... Prieto-Baena a , Pablo J. Hidalgo b , Eugenio Domínguez a & Carmen Galán a pages 153-... more ... Prieto-Baena a , Pablo J. Hidalgo b , Eugenio Domínguez a & Carmen Galán a pages 153-159. ... Aerobiologia , 7: 4957. [CrossRef] View all referencesEmberlin & Norris-Hill 199116. Galán, C., Alcázar, P., Cariñanos, P., García, H. and Domínguez-Vilches, E. 2000. ...
Page 1. This article was downloaded by: [66.249.68.104] On: 13 July 2011, At: 01:02 Publisher: Ta... more Page 1. This article was downloaded by: [66.249.68.104] On: 13 July 2011, At: 01:02 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Grana ...
Pablo J. Hidalgo1, Antoine Mangin2, Carmen Galán1, Odile Hembise2, Luis M. Vázquez1 & Oscar Sanch... more Pablo J. Hidalgo1, Antoine Mangin2, Carmen Galán1, Odile Hembise2, Luis M. Vázquez1 & Oscar Sanchez2 1Department of Plant Biology, University of Córdoba, Campus Universitario de Rabanales, 14071-Córdoba, Spain (E-mail: bv2hifep@uco.es); 2ACRI-ST, 260 Route ...
A 3-year male phenological field study was performed on the represented species of the genus Cupr... more A 3-year male phenological field study was performed on the represented species of the genus Cupressus in the city of Cordoba (Spain): Cupressus arizonica, C. macrocarpa and C. sempervirens. A new and complete description of the phenological stages of the male flower of Cupressus was obtained. Five phenological phases were described using internal and external bud/flower traits. In general, different pollination periods were recorded for the 3 years. C. arizonica flowered from 20 to 23 days before the others. C. macrocarpa and C. sempervirens flowered almost simultaneously, although the former appeared to flower slightly earlier. The total number of trees per square kilometre was estimated taking into account the total number of trees of each species in the city and surrounding area (5 km radius from the city centre). Data corresponding to total pollen production per tree were taken from a previous study in which the partial contribution of each species to atmospheric pollen was estimated. Considering all these parameters, a theoretical airborne pollen model was proposed. A correlation coefficient (R 2 ) of 0.46 was obtained when comparing this model with the average airborne pollen concentrations for the last 18 years. According to the proposed model, C. macrocarpa trees accounted for 78% of total airborne pollen, while C. sempervirens and C. arizonica accounted for only 18% and 4%, respectively. The final objective of this study was to provide additional biological information on these species responsible for winter pollinosis in the Mediterranean area. Forecasting pollen emission and dispersion has an important application in public health warnings.
A semi-automatic system for pollen recognition is studied for the european project ASTHMA. The go... more A semi-automatic system for pollen recognition is studied for the european project ASTHMA. The goal of such a system is to provide accurate pollen concentration measurements. This information can be used as well by the palynologists, the clinicians or a forecast system to predict pollen dispersion. At first, our emphasis has been put on Cupressaceae, Olea, Poaceae and Urticaceae pollen types. The system is composed of two modules: pollen grain extraction and pollen grain recognition. In the first module, the pollen grains are observed in light microscopy and are extracted automatically from a pollen slide coloured with fuchsin and digitized in 3D. In the second module, the pollen grain is analyzed for recognition. To accomplish the recognition, it is necessary to work on 3D images and to use detailed palynological knowledge. This knowledge describes the pollen types according to their main visible characteristerics and to those which are important for recognition. Some pollen structures are identified like the pore with annulus in Poaceae, the reticulum in Olea and similar pollen types or the cytoplasm in Cupressaceae. The preliminary results show the recognition of some pollen types, like Urticaceae or Poaceae or some groups of pollen types, like reticulate group.
On the presence of Narcissus scaberulus Henriq. (Amaryllidaceae) in western Andalusia (Spain). Na... more On the presence of Narcissus scaberulus Henriq. (Amaryllidaceae) in western Andalusia (Spain). Narcissus scaberulus Henriq. is recorded for the first time in western Andalusia, specifically from the province of Huelva.
The dehesa is a traditional agrosilvopastoral ecosystem characterized by a savanna-like structure... more The dehesa is a traditional agrosilvopastoral ecosystem characterized by a savanna-like structure. It has been in decline since the middle of the last century, in particular in agricultural environments where it has been relegated to isolated forests. This paper presents a study into the reduction over the past 50 years. One of the main causes of this decline has been identified as xylophagous insects, specifically the wood borer Cerambyx welensii Kuster (Coleoptera: Cerambycidae). Based on estimations in both the population size, using Jolly Seber models, and the level of tree injury, using a single-index model, the study investigates the role the insect has played in the decline of the dehesa. Surface area loss was found to be greater than 50%, while canopy cover has diminished linearly over the period studied, with the risk of disappearance of the woodland increasing in the same magnitude as borer population density. The highest wood borer population densities observed correspond...
Habitat loss and fragmentation are considered some the main threats to biodiversity. Original for... more Habitat loss and fragmentation are considered some the main threats to biodiversity. Original forests have suffered an accentuated fragmentation and agricultural homogenization, leaving only some areas of natural vegetation, relegated to strongly anthropized disconnected patches (island forests, IFs) in a hostile matrix. These patches of original vegetation could be the key for the design and management of ecological corridors to promote species migration, an essential strategy for meeting the consequences of Global Change. This study proposes a comparative analysis of the fragmentation and connectivity of IFs of Quercus in two typically Mediterranean areas of predominantly agricultural use: the Guadalquivir valley (Spain) and the Apulia region (Italy). A retrospective comparison is also carried out in the Guadalquivir valley. The aim is to develop an objective new methodology to locate the patches of most interest using quantitative and qualitative data. Reference cartography of cu...
Platanus is a major cause of pollen allergy in many Spanish cities. The present paper reports an ... more Platanus is a major cause of pollen allergy in many Spanish cities. The present paper reports an analysis of Platanus pollen season throughout the Andalusia region (southern Spain), which has among the highest pollen counts and the highest incidence of Platanus-related allergies in Europe. The main aim was to analyze pollen season trends from 1992 to 2010 in Andalusia; models were also constructed to forecast the start of the season. Daily pollen counts were recorded using Hirst-type volumetric sporetraps. Pollen season start-dates were very similar at all sites, usually occurring in March. The pollen season was delayed over the study period. The Pollen-season duration and Pollen index generally increased throughout the study period. The starting date for temperature accumulation was around the 10th February, although the threshold temperatures varied by site. The regional model for Andalusia failed to provide sufficiently accurate results compared with sub-regional or local models. For modeling purposes, three sub-regions are recommended: Inland, East Coast and West Coast.
Potential pollen production, viability and germination were studied in the most important species... more Potential pollen production, viability and germination were studied in the most important species of Quercus in the mountains of Có rdoba to determine the contribution of each species to the total amount of airborne pollen. The results were compared over two consecutive years with different rainfall patterns. The viability of pollen grains was determined at anther opening, and during the pollination period, in order to determine potential pollination capacity. Results indicated that there were differences in the number of pollen grains produced by stamen in the four species. Equally, there were differences in the number of flowers among the species, being Q. suber the species with higher number of catkins groups and flowers per individual tree. Total pollen production per tree can be summarized in the following proportion: 1: 3: 3: 6 (Q. coccifera, Q. ilex ssp. ballota, Q. faginea and Q. suber). Potential pollen viability was estimated using the Fluorochromatic Reaction (FCR) and a germination assay. The results have shown that Quercus potential pollen viability is high and declines slowly with time. Q. coccifera was the species with the highest percentage of germination, with Q. suber being the lowest.
(1) Biodiversity, sustainable development and nature conservation are fundamental issues nowadays... more (1) Biodiversity, sustainable development and nature conservation are fundamental issues nowadays. All companies, administrations, governments and international organisations take these issues into consideration. Sustainable forest management always requires a compromise between profitability and conservation and in this fragile equilibrium, forest certification plays a key scheme. This sustainable management is of great importance in the European Union (EU), with the Forest Stewardship Council playing a fundamental role in forest certification. This certification forms the basis of the ecosystem conservation and improvement strategy in Ence, Energía y Celulosa, the leading company dedicated to the production of eucalyptus in Spain; (2) A three-phase protocol (identification of High Conservation Values, assessment of conservation areas and monitoring program), has been developed, providing clear, objective criteria, particularly concerning FSC (Forest Stewardship Council) Principle 9, the primary goal being the development and application of these objective criteria in the Ence conservation areas in the province of Huelva (Spain). One of the main criteria for habitat classification was correspondence with the habitats listed in Annex I of the Habitats Directive. The compatibility between forest exploitation management and conservation proposed by the Natura 2000 network encouraged us to use this methodology for the identification, classification and assessment of High Conservation Values considered in FSC forest certification: Principle 9; (3) The study encompasses 183 forest management units covering 52,022 ha, with a total of 11,847.45 ha being identified as High Conservation Value Areas. Through the identification and assessment of the conservation areas, the described methodology played a crucial role in demonstrating the positive impact of Ence's certified forest management on the conservation of biological diversity; (4) This study demonstrates that an objective and reliable identification, assessment and monitoring methodology, with a proven high degree of accuracy in the location and characterisation of interesting and representative habitats in the region, can be implemented. Due to its objectivity, this strategy can be easily applied to other European sustainable forest management sites and possibly to other countries outside the EU.
Boletin De La Sociedad Andaluza De Entomologia, 2012
Se cita por primera vez el endemismo ibérico Chondrostega vandalicia (Millière, 1865) en el Parqu... more Se cita por primera vez el endemismo ibérico Chondrostega vandalicia (Millière, 1865) en el Parque Natural Sierra de las Nieves, provincia de Málaga. Este hallazgo supone su distribución más meridional y la mayor altitud registrada (1.700 m. aprox.).
& Key message Composite logistic regression models simulating the potential effect of global clim... more & Key message Composite logistic regression models simulating the potential effect of global climate change on forests dynamics in the southern Iberian Peninsula identify Holm oak [Quercus ilex subsp. ballota (Desf.) Samp.] and Aleppo pine (Pinus halepensis Mill.) as the chief beneficiaries of the anticipated environmental shifts, whereas other oak species and conifers suffer a decline. & Context The ten most important tree species (five oaks and five conifers) in Southern Spain were selected for the study. The study area, corresponding to the region of Andalusia, is located in an interesting position between Central European and North African climates. The territory also exhibits the most extreme patterns of rainfall in the Iberian Peninsula. & Aims This study aims to model the potential distribution of the ten species in response to climate change, in several time periods, including the present and two future twenty-first century dates. & Methods The potential distributions within the different scenarios were simulated using logistic regression techniques based on a set of 19 climate variables from the WorldClim 1.4 project. The scenarios were drawn from the RCP 2.6 and 6.0 in the CCSM4 Global Circulation Model. The resolution of the output maps was 30 arc-seconds. & Results The simulation predicted increased distribution areas for Q. ilex and P. halepensis under the four future scenarios as compared to present. The eight remaining taxa suffered a severe retraction in potential distribution. & Conclusion Global climate change is likely to have a significant impact on forest dynamics in southern Spain. Only two species would benefit to the detriment of the others. Logistic Regression is identified as a robust method for carrying out management and conservation programmes.
manninen, h. e., Bäck, J., sihto-nissilä, s.-l., huffman, J. a., Pessi, a.-m., hiltunen, v., aalt... more manninen, h. e., Bäck, J., sihto-nissilä, s.-l., huffman, J. a., Pessi, a.-m., hiltunen, v., aalto, P. P., hidalgo, P. J., hari, P., saarto, a., : Patterns in airborne pollen and other primary biological aerosol particles (PBaP), and their contribution to aerosol mass and number in a boreal forest. Boreal Env. We studied variation in concentrations of airborne pollen and other particles of biological origin in a boreal forest in Finland during [2003][2004]. The highest concentrations of pollen were observed in late spring and early summer, whereas the peak concentrations of other particles of biological origin (including e.g. fungal spores) occurred in August-September. Although the patterns in concentrations in 2003 and 2004 were similar, the concentration levels were significantly different between the years. The contribution of pollen and other particles of biological origin led to an increase in the measured particulate matter (PM) mass during the pollen season (mass of pollen and other particles of biological origin 5.9 and 0.4 µg m -3 , respectively, in respect to PM total mass of 9.9 µg m -3 ) but the effect on total particle number was negligible. The other particles of biological origin constituted the largest fraction of measured primary biological aerosol particle (PBAP) numbers (~99%), whereas pollen showed a higher relative mass fraction (~97%) of PBAP. These results underline the important contribution of PBAP to coarse atmospheric particle mass providing up to 65% of the total mass during the peak pollen season.
Pollen monitoring is of great importance for the prevention of allergy. As this activity is still... more Pollen monitoring is of great importance for the prevention of allergy. As this activity is still largely carried out by humans, there is an increasing interest in the automation of pollen monitoring. The goal is to reduce monitoring time in order to plan more efficient treatments. In this context, an original device based on computer vision is developed. The goal of such a system is to provide accurate measurement of pollen concentration. This information can be used as well by palynologists, clinicians or by a forecast system to predict pollen dispersion. The system is composed of two modules: pollen grain extraction and pollen grain recognition. In the first module, the pollen grains are observed in light microscopy and are extracted automatically from a microscopic slide dyed with fuchsin and digitised in 3D. The colour segmentation techniques implemented on a hardware architecture are presented. In the second module, the pollen grains are analysed for recognition. To accomplish recognition, it is necessary to work on 3D images and to use deep palynological knowledge. This knowledge describes the pollen types according to their main visible characteristerics and to those which are important for recognition. Some pollen structures are identified, like the pore with annulus in Poaceae, the reticulum in Olea and similar pollen types or the cytoplasm in Cupressaceae. Preliminary results show correct recognition of some pollen types, like Urticaceae or Poaceae, and some groups of pollen types, like reticulate group.
Page 1. Israel Journal of Plant Sciences Vol 49 2001 pp. 41^7 Catkin frost damage in Mediterranea... more Page 1. Israel Journal of Plant Sciences Vol 49 2001 pp. 41^7 Catkin frost damage in Mediterranean cork-oak {Quercus súber L.) Herminia García-Mozo,* Pablo J. Hidalgo, Carmen Galán, Maria Teresa Gómez-Casero, and ...
... Prieto-Baena a , Pablo J. Hidalgo b , Eugenio Domínguez a & Carmen Galán a pages 153-... more ... Prieto-Baena a , Pablo J. Hidalgo b , Eugenio Domínguez a & Carmen Galán a pages 153-159. ... Aerobiologia , 7: 4957. [CrossRef] View all referencesEmberlin & Norris-Hill 199116. Galán, C., Alcázar, P., Cariñanos, P., García, H. and Domínguez-Vilches, E. 2000. ...
Page 1. This article was downloaded by: [66.249.68.104] On: 13 July 2011, At: 01:02 Publisher: Ta... more Page 1. This article was downloaded by: [66.249.68.104] On: 13 July 2011, At: 01:02 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Grana ...
Pablo J. Hidalgo1, Antoine Mangin2, Carmen Galán1, Odile Hembise2, Luis M. Vázquez1 & Oscar Sanch... more Pablo J. Hidalgo1, Antoine Mangin2, Carmen Galán1, Odile Hembise2, Luis M. Vázquez1 & Oscar Sanchez2 1Department of Plant Biology, University of Córdoba, Campus Universitario de Rabanales, 14071-Córdoba, Spain (E-mail: bv2hifep@uco.es); 2ACRI-ST, 260 Route ...
A 3-year male phenological field study was performed on the represented species of the genus Cupr... more A 3-year male phenological field study was performed on the represented species of the genus Cupressus in the city of Cordoba (Spain): Cupressus arizonica, C. macrocarpa and C. sempervirens. A new and complete description of the phenological stages of the male flower of Cupressus was obtained. Five phenological phases were described using internal and external bud/flower traits. In general, different pollination periods were recorded for the 3 years. C. arizonica flowered from 20 to 23 days before the others. C. macrocarpa and C. sempervirens flowered almost simultaneously, although the former appeared to flower slightly earlier. The total number of trees per square kilometre was estimated taking into account the total number of trees of each species in the city and surrounding area (5 km radius from the city centre). Data corresponding to total pollen production per tree were taken from a previous study in which the partial contribution of each species to atmospheric pollen was estimated. Considering all these parameters, a theoretical airborne pollen model was proposed. A correlation coefficient (R 2 ) of 0.46 was obtained when comparing this model with the average airborne pollen concentrations for the last 18 years. According to the proposed model, C. macrocarpa trees accounted for 78% of total airborne pollen, while C. sempervirens and C. arizonica accounted for only 18% and 4%, respectively. The final objective of this study was to provide additional biological information on these species responsible for winter pollinosis in the Mediterranean area. Forecasting pollen emission and dispersion has an important application in public health warnings.
A semi-automatic system for pollen recognition is studied for the european project ASTHMA. The go... more A semi-automatic system for pollen recognition is studied for the european project ASTHMA. The goal of such a system is to provide accurate pollen concentration measurements. This information can be used as well by the palynologists, the clinicians or a forecast system to predict pollen dispersion. At first, our emphasis has been put on Cupressaceae, Olea, Poaceae and Urticaceae pollen types. The system is composed of two modules: pollen grain extraction and pollen grain recognition. In the first module, the pollen grains are observed in light microscopy and are extracted automatically from a pollen slide coloured with fuchsin and digitized in 3D. In the second module, the pollen grain is analyzed for recognition. To accomplish the recognition, it is necessary to work on 3D images and to use detailed palynological knowledge. This knowledge describes the pollen types according to their main visible characteristerics and to those which are important for recognition. Some pollen structures are identified like the pore with annulus in Poaceae, the reticulum in Olea and similar pollen types or the cytoplasm in Cupressaceae. The preliminary results show the recognition of some pollen types, like Urticaceae or Poaceae or some groups of pollen types, like reticulate group.
Uploads
Papers by Pablo Hidalgo