RESUMEN
Monitoring and management of alien coypu (Myocastor coypus) is a key issue in Europe since this species has been included in the EU Invasive Alien Species Regulation 1143/2014. Thus, controlling the population of this rodent is considered as imperative by wildlife managers. Coypu management in urban areas is crucial considering potential conflicts with human activities. The aim of this study is to investigate citizens' knowledge, perceptions and opinions towards the presence and management of coypu in a case study in Central Italy (the Serravalle urban park, Tuscany). The survey was administered to a subset of municipal residents and garnered responses from 281 park visitors. The outcomes showed a high level of knowledge of respondents: 99.3% of total respondents had heard of coypu before this survey, and 93.9% were able to distinguish the coypu from the Eurasian beaver (Castor fiber). Despite the importance of coypu control in invaded countries, our results highlight that most respondents are against the removal of coypu, with the exception of most young, highly-educated and upperclass men, but favouring sterilization over capture and population control. Findings of this study could assist managers in enhancing the efficacy of management efforts via an information initiative involving the general public. Achieving this goal may entail improved communication by wildlife managers, which is imperative for optimizing management strategies regarding alien species.
Asunto(s)
Roedores , Animales , Humanos , Italia , Masculino , Especies Introducidas , Factores de Edad , Femenino , Encuestas y Cuestionarios , Opinión Pública , Escolaridad , Adulto , Persona de Mediana Edad , Percepción , Ciudades , Conservación de los Recursos NaturalesRESUMEN
In the last decades, the structural and functional role of standing dead trees and lying deadwood in forests has been widely recognized by scientific community and forest managers. However, a large amount of deadwood in forests can have negative impacts on recreational forests by reducing the aesthetic value and site attractiveness. The aims of the present study are to investigate whether deadwood in forests is truly perceived negatively by people and whether socio-demographic characteristics influence the respondents' perception. To achieve these aims, the study was implemented by submitting an online questionnaire to a sample of 1292 Italian citizens. The results show that 73.4% of respondents have previous knowledge of the concept of deadwood in forests, while 26.6% have never heard this concept. For most of the respondents, standing dead trees and lying deadwood have a negative aesthetic effect on the landscape (52.2% and 42.9%), while for only 7.5% and 23.0% of respondents standing dead trees and lying deadwood have a positive effect on forest landscape. The results show that for all six forest stands proposed (Old European beech coppice, Mediterranean maquis, Norway spruce high forest, simple sweet Chestnut coppice, European beech high forest, black pine high forest) the respondents prefer the situation without deadwood. Finally, the results show that deadwood - both standing dead trees and lying deadwood - in forests is on average more appreciated by male (rather than female), young people (rather than old people), and people with a low level of education (rather than people with a high level of education).
RESUMEN
Deadwood decomposition is a complex and dynamic process with large implications for biogeochemical cycling of carbon (C) and nitrogen (N) in forest soil and litter. Moreover, it affects functional and structural diversity of fungal and bacterial communities in these components. Mesocosms with deadwood blocks at progressive decay classes were set in a black pine forest and incubated for 28 months in the field with the aim to assess the impact of deadwood decomposition on i) CO2, CH4 and N2O fluxes; ii) C and N pools and allocation among deadwood, litter and soil; iii) the fungal and bacterial structural diversity and activity. CO2, CH4 and N2O fluxes from deadwood were monitored throughout the field incubation; deadwood biomass loss and decay rate for each decay class were calculated. The stock of C and N, enzyme activities, fungal and bacterial communities in deadwood, litter fractions (fresh, fragmented and humified) and soil at two depths were measured. Emissions of CO2 and CH4 increased over the deadwood decomposition advancement and the decay reached the maximum rates in the last decomposition classes. N2O fluxes were low and showed either production (prevalent in the first year) or consumption. Independent of the decay class, 20% of C stored in deadwood was lost as CO2 in the atmosphere, whereas 32% was transferred to the fragmented and humified litter fractions in the last decay class. A corresponding increase of cellulose and hemicellulose degrading enzymes was found in deadwood, also favored by substrates accessibility through fragmentation and successional changes in fungal and bacterial communities. Deadwood, litter fractions and soil components were clearly distinguished in terms of chemical and microbiological properties and activities. Fragmented and humified litter fractions were the only components responsive to the advanced stage of deadwood decomposition, being directly affected by the physical redistribution of fragmented organic matter.
Asunto(s)
Pinus , Suelo , Biomasa , Ecosistema , Bosques , Microbiología del SueloRESUMEN
OBJECTIVE: The objectives of the European Union (EU) policy agenda are to reduce the greenhouse gas emissions and to decrease the dependence of EU member countries from fossil fuel sources. In order to achieve these policy objectives, in the last decades the number of biomass power plants has increased throughout the EU. This study analyzed the environmental impacts of the bioenergy systems at global and local level to support communication and information strategies to increase social acceptance and to reduce conflicts between stakeholders. The environmental impacts were estimated to a sample of biomass power plants in North Italy selected based on the size, feedstock and type (cogeneration or heating). The study aims to identify and evaluate the environmental impacts associated with the thermal energy production in biomass power plants using a Life Cycle Assessment (LCA) approach. MATERIALS AND METHODS: For each biomass district plant an LCA analysis was performed to: compare the environmental impacts associated with the production of the same functional unit, quantifying and valuating the environmental performance deriving from the production process life cycle, and highlighting the production phases with greater impact. RESULTS: The results show an average climate change impact by biomass energy plant of 45.84 gCO2eq MJ-1 and a range between 14.93 gCO2eq MJ-1 and 90.70 gCO2eq MJ-1. The results show that the size of the biomass energy plant (less than 1 MW or more than 1 MW) and the feedstock used (forest or sawmill woodchip) are two main variables that influence many categories of environmental impact.
RESUMEN
Values are generally defined as social facts that orientate individual and collective actions, and consequently influence political, economic and social systems. The evaluation of natural resource values is considered an important instrument to support decision making in environmental policy. The forest is an important renewable resource that provides a mix of social, economic and environmental values for society. The paper presents a survey method to collect and analyse individual preferences relating to three macro-categories of forest values. The survey method was tested in the Trentino region (north-east of the Italian Alps) and will soon be extended to other areas. The results of the questionnaires provided evidence that the forest economic value is perceived as least important, while the environmental values were appreciated the most. Regarding the principle social variables, males tended to give higher scores to all three macro-categories compared to females. Moreover, people with a low education also gave higher scores to all three categories in comparison to the more educated individuals.