Integrating high resolution drone imagery and forest inventory to distinguish canopy and understory trees and quantify their contributions to forest structure and dynamics.

Tree growth and survival differ strongly between canopy trees (those directly exposed to overhead light), and understory trees. However, the structural complexity of many tropical forests makes it difficult to determine canopy positions. The integration of remote sensing and ground-based data enables this determination and measurements of how canopy and understory trees differ in structure and dynamics. Here we analyzed 2 cm resolution RGB imagery collected by a Remotely Piloted Aircraft System (RPAS), also known as drone, together with two decades of bi-annual tree censuses for 2 ha of old growth forest in the Central Amazon. We delineated all crowns visible in the imagery and linked each crown to a tagged stem through field work. Canopy trees constituted 40% of the 1244 inventoried trees with diameter at breast height (DBH) > 10 cm, and accounted for ~70% of aboveground carbon stocks and wood productivity. The probability of being in the canopy increased logistically with tree diameter, passing through 50% at 23.5 cm DBH. Diameter growth was on average twice as large in canopy trees as in understory trees. Growth rates were unrelated to diameter in canopy trees and positively related to diameter in understory trees, consistent with the idea that light availability increases with diameter in the understory but not the canopy. The whole stand size distribution was best fit by a Weibull distribution, whereas the separate size distributions of understory trees or canopy trees > 25 cm DBH were equally well fit by exponential and Weibull distributions, consistent with mechanistic forest models. The identification and field mapping of crowns seen in a high resolution orthomosaic revealed new patterns in the structure and dynamics of trees of canopy vs. understory at this site, demonstrating the value of traditional tree censuses with drone remote sensing.

Experiências e perspectivas dos homens sobre sua participação na gestação: um estudo de abordagem qualitativa / Men's experiences and perspectives on their involvement in pregnancy: a qualitative approach study

OBJETIVO: Compreender a percepção masculina sobre sua própria participação durante a gestação. MÉTODO: Pesquisa descritiva de abordagem qualitativa. As informações foram coletadas por meio de entrevistas semiestruturadas com dez homens acompanhantes de puérperas em Alojamento Conjunto, e submetidas a análise temática. RESULTADOS: De maneira geral, a participação do homem no pré-natal ocorreu no acompanhamento nas consultas, em exames e no suporte na realização das tarefas domésticas. Algumas limitações foram a rotina de trabalho e aspectos jurídicos relacionados a questões trabalhistas. Os entrevistados apontaram sugestões para maior incentivo na sua participação e na inclusão na vivência da gestação e do pré-natal. CONCLUSÃO: Os profissionais da área devem dar voz aos pais, e devem inseri-los como alvo das ações em saúde, tornando-o também protagonista neste momento, e assim reforçando as boas práticas assistenciais determinadas por políticas governamentais.

OBJECTIVE: To understand men's experiences and perceptions of their involvement in pregnancy. METHOD: A descriptive, qualitative research approach was used. Information was collected through semi-structured interviews with ten male partners of postpartum women in a shared accommodation setting and subjected to thematic analysis. RESULTS: Overall, men's involvement in prenatal care included attending medical appointments, being present during examinations, and assisting with household tasks. Some limitations included work routines and legal aspects related to work issues. Respondents suggested ways to encourage greater involvement and inclusion in the experience of pregnancy and prenatal care. CONCLUSION: Health professionals should give fathers a voice and include them as targets of health initiatives, making them active participants during this period and reinforcing good health practices set by government policies.