Monetary Forestry Accounting including Environmental Goods and Services

En la actualidad existe sustancial interés en expandir los sistemas de contabilidad de forma tal que se incluyen servicios apropiados de los sistemas ecológicos. Muchas de las actividades desarrolladas se han centrado alrededor de los recursos forestales; actualmente existen más de 100 estudios de contabilidad forestal «verde» en diferentes países del mundo. Este artículo provee una visión de aspectos teóricos y empíricos de la contabilidad forestal «verde». En este se discute el cálculo de la renta «real» del bosque, así como los problemas de medición generados al valorar servicios sin precio de mercado. También se revisan los esfuerzos recientes de la Oficina Estadística de la Unión Europea (Eurostat) y se incluye una presentación detallada de las aplicaciones oficiales de la contabilidad forestal «verde» en Suecia. Este artículo concluye argumentando que los trabajos futuros de contabilidad forestal «verde» deberían dirigirse a través de la integración de la teoría y la práctica hacia un alcance mayor al que tiene la actual propuesta de Eurostat

NIVEAUX DE SPINS ELEVES OBTENUS PAR REACTIONS (α, 2nγ)

Par réactions (α, 2nγ) sur des cibles de Tm et Lu on excite les niveaux de 171Lu et 177Ta. Les différentes bandes de rotation sont identifiées.By means of (α, 2nγ) reactions on Tm and Lu targets the levels of 171Lu and 171Ta are excited. Assignments have been made for the rotational bands

Low cost (audio) recording (LCR) for advancing soundscape ecology towards the conservation of sonic complexity and biodiversity in natural and urban landscapes

Low cost (audio) recorders (LCRs) represent a new opportunity to investigate the sonic complexity of both natural and urban ecosystems. LCRs are inexpensive sampling audio recorders which have the external shape of a universal serial bus (USB) flash drive, and are composed of a microphone, an analog-to-digital converter, central processing unit with permanent internal non-volatile memory, rechargeable battery, and a USB connection. The reduced dimen­sions allow the device to be deployed inconspicuously within any environment, in any config­uration and for an extended time period. This investigation tested a specific type of LCR (UR-09) with a spectral range of 8 kHz -sufficient to cover the acoustic range of most western Palearctic songbirds. The reliability of the UR-09, compared with other commercial recorders (Zoom H4 and Song Meter SM1) and based on the quality of recordings quantified by the Acoustic Complexity Index (ACI), was tested and confirmed. An example of the application of LCRs is presented in an evaluation of the audio patterns occurring during dawn and dusk choruses within a forested ecosystem. Results of this investigation are encouraging and a new generation of LCR devices is currently being designed with real-time acoustic data processing capabilities, timer programmability, a larger frequency range and wireless communication compatibility. LCRs are revealed to be ideal instruments to conduct surveys in fragile or protected areas and also in urban environments. Moreover, due to their low cost, they can be used to encourage research in soundscape ecology, especially within developing countries, where large areas can be monitored by professionals or incorporating citizen science models of data collection. Keywords Soundscape ecology . Low cost (audio) recorders . Acoustic complexity index . Acoustic monitoring . Citizen science . Urban ecosystem