Person: Rescia Perazzo, Alejandro Javier
Loading...
First Name
Alejandro Javier
Last Name
Rescia Perazzo
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Department
Biodiversidad, Ecología y Evolución
Area
Ecología
Identifiers
6 results
Search Results
Now showing 1 - 6 of 6
Item Relationship between landscape structure and abundance of airborne beneficial arthropods in an olive agro-ecosystem(Iobc Wprs Bulletin, 2017) Pascual, Susana; Rescia Perazzo, Alejandro Javier; Sánchez Ramos, Ismael; González Núñez, Manuel; Ortega Quero, MartaSome of the groups of beneficial arthropods present in the olive grove canopy are hoverflies, hymenopteran parasitoids and bees. In this research we test the hypothesis that the abundance of these groups in olive groves increases with increasing landscape complexity. In spring 2015 and 2016 we determined the abundance of the beneficial insect groups in 15 olive groves by identification of insects captured on 4 yellow sticky traps in each olive grove. Indices of landscape structure were calculated in circular areas with radii ranging from 250 to 1500 m around the 15 olive groves selected. Preliminary results indicate that in both sampling dates, the abundance of hoverflies was negatively correlated with the patch size of the olive grove, but positively correlated with the total area of scrublands and oak forests and with the diversity index of land uses. The abundance of hymenopteran parasitoids and bees was also positively correlated with the total area of scrublands with oak, in both years, but negatively correlated with the patch size of olive groves in the case of bees. Not all these relationships were significant at all radii and years analysed. These results indicate that intermingling of spontaneous vegetation with olive groves favours the presence of beneficial arthropods.Item Can hay harvesting detrimentally affect adult butterfly abundance?(Journal of Insect Conservation, 2010) Dover, John W.; Rescia Perazzo, Alejandro Javier; Fungariño, S.; Faiburn, J.; Carey, P.; Lunt, P.; Dennis, R. L. H.; Dover, C. J.Butterfly transects were carried out in the meadows and tracks of a 1.5 x 1.6 km study area in the Cantabrian section of the Picos de Europa, Spain to examine the impact of hay harvesting on adult butterfly numbers. Overall butterfly numbers significantly decreased between transect counts taken before and after harvesting in cut fields; no such decline was evident in fields without active management (harvesting/grazing) over the same period. Family-level analysis showed hay harvesting to significantly impact on the Satyridae but not other groups. In fields not undergoing active management no Familylevel declines were evident, but the Lycaenidae significantly increased in abundance over the same period. Butterfly abundance on tracks surrounding the meadows significantly decreased during the hay harvest period, but this was not reflected in significant decreases in any particular Family group. The results are discussed in relation to the time of harvesting during the day, and socioeconomic changes in extensive pastoral landscapes.Item Effect of local and landscape factors on abundance of ground beetles and assessment of their role as biocontrol agents in the olive growing area of southeastern Madrid, Spain(BioControl, 2019) Callejas Hervás, Carmen; Ortega Quero, Marta; Rescia Perazzo, Alejandro Javier; Lantero Bringas, Esther; Sánchez Ramos, Ismael; González Núñez, Manuel; Fernández, Cristina E.; Matallanas Peñas, Beatriz; Pascual, SusanaDesigning biological control strategies for the olive fruit fly (Bactrocera oleae (Rossi)) by predators requires the study of their biology and effectiveness. In this work, we have studied the relationship between ground beetle activity density and local (soil condition) and landscape factors in the olive area of southeastern Madrid, as well as the efficiency of the most abundant species, Orthomus barbarus (Dejean) (Coleoptera: Carabidae) by functional response experiments. Also, O. barbarus has been described for the first time by molecular methods through the barcode gene COI. The two dominant species, O. barbarus and Pterostichus globosus (Fabricius) (Coleoptera: Carabidae) showed different responses to landscape structure, but soil condition was more relevant than landscape structure for both species, and for activity density of ground beetles as a whole. P. globosus is more efficient than O. barbarus, and it is possible that in the study area other taxa are relevant as B. oleae predators.Item Evaluating the role of a protected area on hedgerow conservation: the case of a spanish cultural landscape(Land Degradation & Development, 2016) Schmitz García, María Fe; Herrero Jaúregui, Cristina; Arnaiz Schmitz, Cecilia; Sánchez, Iván A.; Rescia Perazzo, Alejandro Javier; Díaz Pineda, FranciscoHedgerows are key features in agricultural landscapes performing diverse functions that are both economically and ecologically significant. Here, we quantify how the characteristics of a relict hedgerow network of a Spanish cultural landscape (Guadarrama mountains in the north of Madrid region) have changed over a single decade both inside and outside the boundaries of a Protected Area, the aim of which is to conserve cultural uses and biodiversity. A gradient of abandonment of pasture systems was detected, including a decline and loss of woody species from hedgerows associated with grazed areas towards shrub encroachment zones. These tendencies were similar inside and outside the boundaries of the Protected Area. The results highlight the management weaknesses of the Protected Area in order to achieve its objectives.Based on the results, we propose to include a specific conservation status for hedgerow landscapes in the regulatory framework of Spanish protected areas. Copyright © 2016 John Wiley & Sons, Ltd.Item Evaluación de la percepción de las poblaciones locales de los cambios de usos del suelo en paisajes culturales agrosilvopastorales en dos zonas de diferente desarrollo(Pastos, paisajes culturales entre tradición y nuevos paradigmas del siglo XXI, 2011) Rescia Perazzo, Alejandro Javier; Pérez Corona, Esther; López Carrasco, Celia; Rodríguez Rojo, María del Pilar; San Miguel Ayanz, Alfonso; Femández González, Federico; Roig Gómez, SoniaEn las últimas décadas, los paisajes culturales mundiales han sido afectados por cambios rápidos que han alterado el delicado equilibrio ecológico-social que habían alcanzado a lo largo del tiempo debido en muchos casos a su capacidad de transformación y adaptabilidad (resiliencia). Parece probable que las consecuencias ecológicas, sociales y económicas de estos cambios muestren diferencias regionales relacionadas con el desarrollo de las sociedades. En el trabajo se estudiaron dos paisajes culturales en áreas económica y socialmente diferentes pero semejantes en carácter rural y uso tradicional de los recursos: 1. Pastos de montaña (Picos de Europa-España); 2. Sistema agrosilvopastoral tradicional (Chaco-Argentina). Se analizó la situación socioeconómica de las poblaciones, su percepción del medio, de sus cambios y de las causas de estos cambios mediante encuestas. En Picos los cambios en el paisaje se caracterizan por el abandono ganadero y la pérdida de pastos y heno, mientras que el Chaco los cambios están dirigidos por la pérdida de bosques debido al avance de la frontera agrícola. Los habitantes de las dos zonas conocen los cambios pero los perciben diferentemente aunque ambos implican la degradación de los ecosistemas nativos y seminaturales y la pérdida de su uso rentable. La restauración de estos paisajes recuperaría estos valores y contribuiría a evitar el abandono rural, el mantenimiento de bienes culturales y el flujo de servicios ecosistémicos.Item A new mechanism based on landscape diversity for funding farmer subsidies(Agronomy for Sustainable Development, 2017) Rescia Perazzo, Alejandro Javier; Sanz Cañada, Javier; Bosque-González, Isabel delAgricultural intensification and farm abandonment in Europe have induced dramatic social, economic, and ecological issues. Sustainable management may solve these issues by providing a viable economic margin and preserving biodiversity. Specifically, we propose herein monetary compensation for farmers maintaining or restoring lands as non-agricultural areas. The mechanism for funding this compensation is based upon spatial analysis of two olive-grove landscapes. These exhibited different land-use patterns, a simple landscape and a complex one presenting a 50% higher diversity index and an 80% higher complexity index. We estimated olive-oil production and profitability. Results showed that the complex landscape contains three times more protected habitats. Neither landscape was economically viable, with the simple one showing values of 43% below the threshold, and the complex one 185%. The mechanism proposed to fund farmer subsidies was developed by means of the spatial and economic data estimated. This conservation payment system considers a non-linear relationship between the subsidies paid and the preserved area of agricultural use. The farmers of the simple landscape would receive a subsidy of 299, 394, and 464 €/ha for 10, 20, and 30% of preserved area, respectively. Inversely, the farmers of the complex landscape would be granted a reduction of 38 and 80 €/ha in their monetary incentives for the loss of 10 and 20%, respectively, of natural areas. Using this funding mechanism, conservation of biodiversity in agricultural areas would no longer constitute a factor limiting profitability, but would rather complement earnings.