Produção e decomposição de folhedo em um trecho de Mata Atlântica de encosta no município do Guarujá, SP

A produção de folhedo e a taxa de decomposição de folhedo (k) foram estimadas, no período de 2.8.85 a 10.8.86, numa área de 1 ha de mata atlântica de encosta (60º de inclinação e altitude de 140m), no município do Guarujá (Lat. S 24º16'; Long. W 46º19'), Estado de São Paulo. A queda pluviométrica anual média é de 2050 mm e não há estação seca definida. O solo é argilo-arenoso e ácido, com pH variando entre 3 e 4. A produção anual de folhedo foi de 7925 kg/ha. A fração folhas contribuiu com 5040 kg/ha seguida pelas frações ramos (1950 kg/ha), flores (491 kg/ha), frutos (222 kg/ha) e material de origem animal (222 kg/ha). A produção de folhedo e das frações componentes foi contínua durante todo o ano. Os valores mensais de produção não revelaram nenhum padrão sazonal. A taxa de decomposição (k) foi estimada para condições de equilíbrio dinâmico (0,72) e também utilizando a porcentagem de peso remanescente da fração foliar (0,83). O tempo médio para a decomposição de 50% do folhedo foi de 350 dias.<br>Litter production and decomposition rate were studied in 1 ha of hillside atlantic forest (60? inclination and 140m high) located at Guarujá (24º 16' S; 46º 19' W) of São Paulo State from 2.8.85 to 10.8.86. This area have not a defined dry season and the annual average rainfall is 2050 mm. The soil is classified as acidic and clay-sand with pH 3.0-4.0. The annual litter production was estimated at 7925 kg/ha: comprising leaves fraction contributing with 5040 kg/ha, followed by branches (1950 kg/ha), flowers (491 kg/ha), fruits (222 kg/ha) and animal products (222 kg/ha). All fractions were produced during all over the year, without any detectable seazonal pattern. The decomposition constant (k) was estimated for steady-state conditions (0,72) and also utilizing the percentage of remaining weight of foliar fraction (0,83). The time necessary for 50% of the litter decomposition was 350 days

Health Communication and Psychological Distress: Exploring the Language of Self-harm

This study explores adolescents’ accounts of self-harm with a view to elucidate the implications for health care practitioners seeking to administer care to teenagers in English. Drawing on a corpus of 1.6 million words from messages posted on a UK-hosted adolescent health Web site, analysis began by identifying a range of keywords relating to self-harm. The subsequent contextual examination of these keywords afforded a close description of the contributors’ experiences of self-harm and the factors that resulted in their self-injurious behaviours. A recurring theme was that of the habitual nature of self-harm, with the act being represented as a form of addiction over which they had little control. Self-harmers construct the phenomenon as particularly powerful, and the act is formulated as the only effective means of relief from emotional turmoil. If we are to increase parents and health professionals’ ability to respond to self-injury in the medium of English, close linguistic attention to individuals’ accounts of self-harm is valuable. Online health resources are also valuable means of eliciting concerns from distressed adolescents who are often reluctant to seek support from professionals face-to-face

Cosmology with the Laser Interferometer Space Antenna

The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale. However, the range of potential cosmological applications of gravitational wave observations extends well beyond these two objectives. This publication presents a summary of the state of the art in LISA cosmology, theory and methods, and identifies new opportunities to use gravitational wave observations by LISA to probe the universe

Cosmology with the Laser Interferometer Space Antenna

The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale. However, the range of potential cosmological applications of gravitational wave observations extends well beyond these two objectives. This publication presents a summary of the state of the art in LISA cosmology, theory and methods, and identifies new opportunities to use gravitational wave observations by LISA to probe the universe

Cosmology with the Laser Interferometer Space Antenna

The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale. However, the range of potential cosmological applications of gravitational wave observations extends well beyond these two objectives. This publication presents a summary of the state of the art in LISA cosmology, theory and methods, and identifies new opportunities to use gravitational wave observations by LISA to probe the universe