Consulta: subjectFacets:"Forest monitoring"
Registros recuperados: 4
Data/hora: 10/06/2024 11:58:37

The Challenge of Forest Diagnostics
Provedor de dados: 7
Autores: Nagendra, Harini; Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore, India; Center for the Study of Institutions, Population, and Environmental Change (CIPEC), Indiana University; nagendra@atree.org; Ostrom, Elinor; Workshop in Political Theory and Policy Analysis, Indiana University; ostrom@indiana.edu.
Ecologists and practitioners have conventionally used forest plots or transects for monitoring changes in attributes of forest condition over time. However, given the difficulty in collecting such data, conservation practitioners frequently rely on the judgment of foresters and forest users for evaluating changes. These methods are rarely compared. We use a dataset of 53 forests in five countries to compare assessments of forest change from forest plots, and forester and user evaluations of changes in forest density. We find that user assessments of changes in tree density are strongly and significantly related to assessments of change derived from statistical analyses of randomly distributed forest plots. User assessments of change in density at the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity; Carbon storage; Community forests; Forest change; Forest monitoring; Peopled forests.
Ano: 2011

Insights from a large-scale inventory in the southern Brazilian Atlantic Forest
Provedor de dados: 63
Autores: Vibrans,Alexander Christian; Gasper,André Luís de; Moser,Paolo; Oliveira,Laio Zimermann; Lingner,Débora Vanessa; Sevegnani,Lucia.
ABSTRACT: A key issue in large-area inventories is defining a suitable sampling design and the effort required to obtain reliable estimates of species richness and forest attributes, especially in species-diverse forests. To address this issue, data from 418 systematically distributed 0.4 ha plots were collected. Estimators of nonparametric species richness were employed to assess the floristic representativeness of data collected in three forest types in the Brazilian Atlantic Forest. The sampling sufficiency of forest attributes was evaluated as a function of sample size. Altogether, 831 tree/shrub species were recorded. The data acquired through the systematic sampling design were representative of both species richness and basal area. The confidence...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest attributes estimation; Species richness; Forest monitoring; Systematic sampling; Secondary forests.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101000

Multi-temporal analysis of radiometric changes in satellite images of forest edges to infer selective-logging areas in the Amazon forest
Provedor de dados: 36
Autores: GRAÇA,Paulo Maurício Lima de Alencastro; MALDONADO,Francisco Dario; SANTOS,João Roberto dos; KEIZER,Edwin Willem Hermanus.
Radiometric changes observed in multi-temporal optical satellite images have an important role in efforts to characterize selective-logging areas. The aim of this study was to analyze the multi-temporal behavior of spectral-mixture responses in satellite images in simulated selective-logging areas in the Amazon forest, considering red/near-infrared spectral relationships. Forest edges were used to infer the selective-logging infrastructure using differently oriented edges in the transition between forest and deforested areas in satellite images. TM/Landsat-5 images acquired at three dates with different solar-illumination geometries were used in this analysis. The method assumed that the radiometric responses between forest with selective-logging effects...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Timber exploitation; Deforestation; Remote sensing; Forest monitoring.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000100035

Analysis of floristic composition and structure as an aid to monitoring protected areas of dense rain forest in southeastern Brazil
Provedor de dados: 39
Autores: Cardoso-Leite,Eliana; Podadera,Diego Sotto; Peres,Juliana Cristina; Castello,Ana Carolina Devides.
To study forest composition and structure, as well as to facilitate management plans and monitoring programs, we conducted a phytosociological survey in the PE Caverna do Diabo State Park and the Quilombos do Médio Ribeira Environmentally Protected Area, both located within the state of São Paulo, Brazil. We analyzed 20 plots of 400 m² each, including only individuals with a circumference at breast height &gt; 15 cm. We employed cluster analysis and ordination (principal component analysis and correspondence analysis), including species data and abiotic data. We evaluated 1051 individuals, belonging to 155 species in 48 families. Of those 155, 18 were threatened species, 33 were endemic species, and 92 (59.4%) were secondary species. The overall Shannon...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Intermediate disturbance; Atlantic Forest; Forest monitoring.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100018