Evaluation of forest harvesting impacts on forest ecosystems

In the Guarani preservation area 100 ha of forest land was cut to evaluate harvest impact in natural subtropical forest. Two treatments were applied: “commercial logging” in which the logging contractor works in the traditional way, and “improved harvest” in which trees are selected and the skidding trails and landings planned. Forest structure and composition, seedlings and regenerations and soil physical parameters such as soil density, penetration resistance were measured before harvesting. The trees were cut by chainsaw and moved by a rubber tyred skidder to the landing area for loading on a truck. After harvesting, damage by cutting and by skidding was measured. All previous parameters were re-measured and traffic intensity in each plot calculated. The harvest yields were 9.9 m3 ha-1 for the improved harvesting and 16.4 m3 ha-1 for the commercial treatment. Trees felled were 6.8 trees ha-1 for improved harvest and 9.9 trees ha-1 for the commercial harvest. For canopy trees, commercial harvesting reduced the initial dominance 19.3%, while improved harvesting only decreased it 9.5% so forest structure is less affected by the improved harvesting. There was little change in abundance and species composition. Changes were observed in the order of importance of some species, e.g. Parapiptademia rigida was replaced by species of lesser importance. Regeneration after the commercial harvesting was less than in the improved harvesting method. Commercial harvesting had more (60%) traffic intensity (Mg km-1 ha-1) along all the skid trials in the plots

Application of MALDI-MS analysis of Rainforest chemodiversity: a keystone for biodiversity conservation and sustainable use

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)471114821485Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Application of MALDI-MS analysis of Rainforest chemodiversity: a keystone for biodiversity conservation and sustainable use

FAPESP/BIOTAFAPESP/BIOTA [2003/12595-7, 2003/02176-7, 2009/54098-6, 2010/50811-7

D-ECG: A Dynamic Framework for Cardiac Arrhythmia Detection from IoT-Based ECGs

Cardiac arrhythmia has been identified as a type of cardiovascular diseases (CVDs) that causes approximately 12 % of all deaths globally. The current progress on arrhythmia detection based on ECG recordings is facing a bottleneck for adopting single classifier and static ensemble methods. Besides, most of the work tend to use a static feature set for characterizing all types of heartbeats, which may limit the classification performance. To fill in the gap, a novel framework called D-ECG is proposed to introduce dynamic ensemble selection (DES) technique to provide accurate detection of cardiac arrhythmia. In addition, the proposed D-ECG develops a result regulator that use different features to refine the classification result from the DES technique. The results reported in this paper have shown visible improvement on the overall heartbeat classification accuracy as well as the sensitivity of disease heartbeats

Caracteres das sementes, plântulas e plantas jovens de Ormosia arborea (Vell.) Harms E Ormosia fastigiata Tul. (Leg-papilionoideae)

Ormosia arborea (Vell.) Harms e Ormosia fastigiata Tul. são espécies similares em muitos caracteres morfológicos, o que resulta em dificuldade na sua identificação, tanto em campo quanto em material herborizado. Neste estudo foram descritas as características morfológicas das sementes e morfoanatômicas das plântulas e plantas jovens de O. arborea e O. fastigiata, coletadas em restinga e em mata ciliar, respectivamente. Sementes e plântulas foram processadas segundo técnicas usuais. As sementes de O. arborea são mais pesadas e têm germinação hipógea criptocotiledonar. O caule contém tricomas tectores esparsos e grande quantidade de lenticelas e, na raiz, nodulações. A folha apresenta parênquima paliçádico de células mais curtas, com base mais larga e presença de pigmentos vacuolares, espaços intercelulares conspícuos no parênquima esponjoso, tricomas tectores restritos à nervura principal e células epidérmicas da face adaxial maiores que as da face abaxial. A germinação de O. fastigiata é fanerocotiledonar, e a plântula possui muitos tricomas ao longo do caule e lenticelas restritas à região basal deste. As folhas apresentam tricomas tectores em todas as nervuras, com parênquima paliçádico de células tipicamente alongadas e parênquima esponjoso com espaços intercelulares reduzidos. Tais características são consistentes para separar as plântulas e sementes dessas espécies, que têm a mesma denominação popular e contribuem com informações úteis para o meio produtivo