Consulta: subjectFacets:"Natural regeneration"
Registros recuperados: 26
Data/hora: 11/06/2024 13:22:01

Seedling recruitment of Austrocedrus chilensis in relation to cattle use, microsite environment and forest disease
Provedor de dados: 67
Autores: La Manna,Ludmila; Collantes,Marta; Bava,José; Rajchenberg,Mario.
The forests of Austrocedrus chilensis in the Patagonian Andes suffer a disease known as "mal del ciprés". The purpose of this work was to identify the relationship between A. chilensis seedling recruitment and disturbances (i.e., disease and cattle grazing), and to identify associations between seedling recruitment and microsite characteristics related to the disturbances. Eighteen sites with "mal del ciprés" were selected for study. In each site, symptomatic and asymptomatic plots were established and characterized. Five control sites, where the disease was totally absent, were also included. Cattle use and disease were negatively associated with A. chilensis natural regeneration. Both disturbances seemed to act synergically. In control sites the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest decline; Mal del ciprés; Natural regeneration; Site effect.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2008000100003

Recovery of Pilgerodendron uviferum (D. Don) Florin forest after antropogenic disturbance in the Valdivian Costal Range, Chile
Provedor de dados: 73
Autores: SZEJNER,PAUL; LE QUESNE,CARLOS; GONZÁLEZ,MAURO E; CHRISTIE,DUNCAN A.
The loss and decline of one ecosystem can be triggered by continuous changes in structure made by frequent and/or severe disturbances. Therefore we quantify the structural losses and the posteriori recovery after man-made disturbances of two fragments of P. uviferum in the Reserva Nacional Valdivia (RNV; 40°S) by studying the evidence of human disturbance and forest structure. Our results indicate frequent burned trees and stumps, indicating that slash and burn are the main factor shaping the present structure of these forest fragments. In both cases 86% of the basal area was represented by dead tress, and 14% of basal area by living individuals. The results show a severe past disturbance and the recovery of those P. uviferum forests by the abundant...
Tipo: Journal article
Palavras-chave: Ciprés de las Guaitecas; Alerce; Deforestation; Natural regeneration; Southern flora; Cordillera de la Costa.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200010

Levantamento florístico da regeneração natural em área de várzea do Rio Guamá, Estado do Pará.
Provedor de dados: 14
Autores: MASCARENHAS, R. E. B.; MULLER, N. R. M.; MODESTO JUNIOR, M. de S.
bitstream/item/42895/1/Boletim-Pesquisa-163-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Levantamento florístico; Área de várzea do rio Guamá; Pará; Brasil; Forest.; Composição Botânica; Erva Daninha; Floresta; Regeneração Natural.; Amazonia; Botanical composition; Natural regeneration; Surveys; Weeds.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374428

Drone é usado para fazer inventário da floresta no Acre.
Provedor de dados: 14
Autores: FIGUEIREDO, E. O.
Este artigo explica como a Embrapa Acre utiliza o sistema Geoflora para fazer inventário florestal, mensurar biomassa florestal e estoque de carbono.
Tipo: Artigo de periódico
Palavras-chave: Drone; Geoprocessamento; Bosques tropicales; Inventario forestal; Regeneración natural; Sistemas de información geográfica; Aviación agrícola; Fotografía aérea; Teledetección; Vehículos aéreos no tripulados; Aeronave remotamente pilotada; Projeto Geoflora; Fundo JBS pela Amazônia; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Floresta Nativa; Inventário Florestal; Regeneração Natural; Sistema de Informação Geográfica; Aviação Agrícola; Aerofotogrametria; Sensoriamento Remoto; Raio Laser; Tropical forests; Forest inventory; Natural regeneration; Geographic information systems; Agricultural aviation; Aerial photography; Remote sensing; Unmanned aerial vehicles; Lasers; Lidar.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1151500

Regeneração natural de áreas utilizadas como roça no Pantanal da Nhecolândia.
Provedor de dados: 14
Autores: CARDOSO, E. L.; SALIS, S. M. de; CRISPIM, S. M. A.; FERNANDES, F. A.; FERNANDES, A. H. B. M.
O objetivo deste trabalho foi avaliar o potencial de regeneração natural de florestas semidecíduas desmatadas para utilização como roças e, posteriormente, abandonadas por 18, 28 e 30 anos sem nenhum tipo de manejo, no Pantanal da Nhecolândia. Para comparação foram utilizadas áreas adjacentes a cada uma das roças com vegetação de floresta nativa preservada. Foram avaliados os atributos químicos do solo, a composição florística e a estrutura da vegetação. Em cada área de estudo (roça e vegetação nativa) foram coletadas amostras de solo, nas profundidades de 0-10 cm, 10-20 cm e 20-40 cm, com três repetições por área, para determinação dos atributos químicos e estoques de carbono e nitrogênio. O levantamento da vegetação foi realizado por meio de duas...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Florestas.; Regeneração natural.; Forest restoration; Natural regeneration.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1085161

Subsídios para o manejo de florestas naturais na Amazônia brasileira: resultados de pesquisa da EMBRAPA/IBDF - PNPF.
Provedor de dados: 14
Autores: CARVALHO, J. O. P. de.
bitstream/item/58263/1/DOCUMENTOS-43-CPATU.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Floresta natural; Flora do Tapajós; Belterra; Jari; Pará; Amapá; Brasil; Natural forest; Management.; Manejo; Inventário Florestal; Pesquisa; Regeneração Natural.; Amazonia; Forest inventory; Research.; Natural regeneration.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382051

Informações sobre a fase de viveiro de algumas espécies florestais na Amazônia brasileira.
Provedor de dados: 14
Autores: MARQUES, L. C. T.; BRIENZA JUNIOR, S.
bitstream/item/31917/1/CPATU-BP49.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Freijo; Especie florestal; Aspecto fitossanitario; Valor economico; Repicagem; Raiz nua natural; Simaruba amara; Campo Experimental de Belterra; Santarem; Pará; Brasil; Brazilian walnut; Seedling; Production; Forest specie; Economic value; Transplanting.; Bagassa Guianensis; Cordia Goeldiana; Marupá; Muda; Produção; Tatajuba.; Amazonia; Planting.; Natural regeneration.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381151

Estudos microclimáticos: radiação global em áreas de floresta e regeneração natural em Capitão-Poço, PA.
Provedor de dados: 14
Autores: BASTOS, T. X.; DINIZ, T. D. de A. S.
bitstream/item/60192/1/CPATU-PA137.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Capitão Poço; Pará; Brasil.; Floresta; Microclima; Regeneração Natural.; Radiação Solar; Amazonia; Forests; Natural regeneration; Microclimate; Solar radiation.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383519

Regeneração natural do mogno (Swietenia macrophylla King) em área manejada na Amazônia Sul-Ocidental.
Provedor de dados: 14
Autores: BARROS, Q. S.; OLIVEIRA, M. V. N. d'; OLIVEIRA, L. C. de.
Esta publicação teve como objetivo estudar a dinâmica da regeneração natural da Swietenia macrophylla em uma unidade de produção anual (UPA), na área de manejo florestal da Floresta Estadual do Antimary, Acre, tendo como enfoque verificar se as alterações promovidas pela exploração florestal provocaram mudanças significativas no estabelecimento da regeneração natural da espécie nos diferentes ambientes estudados, além disso, está de acordo com os Objetivos de Desenvolvimento Sustentável (ODS).
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Manejo florestal; Unidade de conservação; Unidade de produção anual (UPA); Floresta Estadual do Antimary; Objetivos de Desenvolvimento Sustentável (ODS); Madera tropical; Regeneración natural; Explotación forestal; Silvicultura sustentable; Bujari (AC); Sena Madureira (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Essência Florestal; Mogno; Swietenia Macrophylla; Regeneração Natural; Exploração Florestal; Impacto Ambiental; Operação Florestal; Agricultura Sustentável; Tropical wood; Natural regeneration; Forest management; Logging; Environmental impact; Sustainable forestry.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112122

Plantio de açaizeiro consorciado com bananeira: uma alternativa de renda para o agricultor familiar.
Provedor de dados: 14
Autores: LUNZ, A. M. P.; ALMEIDA, U. O. de; ANDRADE NETO, R. de C.
bitstream/item/159330/1/26309.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Bananos; Cultivo mixto; Regeneración natural.; Degradación de la tierra; Explotación agrícola familiar; Agricultura familiar; Consorciação de cultura; Açaí; Banana; Musa sp; Deterioração do solo; Regeneração natural; Plátano.; Family farms; Mixed cropping; Bananas; Land degradation; Natural regeneration; Euterpe precatoria.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1068948

Avaliação da regeneração natural após exploração florestal na Floresta Estadual do Antimary, Acre.
Provedor de dados: 14
Autores: CARVALHO, A. L. de; OLIVEIRA, M. V. N. d'; OLIVEIRA, L. C. de.
Para entender melhor como a floresta responde ao manejo florestal avaliaram-se os efeitos da exploração florestal na regeneração natural de espécies arbóreas considerando diferentes ambientes produzidos pelas operações de exploração florestal, por meio de parcelas estabelecidas em unidades de produção anual (UPAs) com 1, 4 e 8 anos de exploração florestal na Floresta Estadual do Antimary, estado do Acre, Brasil. O estudo foi conduzido nos pátios, estradas secundárias, trilhas de arraste e clareiras produzidas pelo corte das árvores. Áreas não afetadas diretamente pela exploração florestal foram utilizadas como controle. Neste estudo foram considerados regeneração natural todos os indivíduos arbóreos entre 50 cm de altura e 10 cm de diâmetro à altura do...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Unidade de conservação; Manejo florestal sustentável; Áreas de conservación; Explotación forestal; Regeneración natural; Silvicultura sustentable; Floresta Estadual do Antimary (AC); Bujari (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Exploração Florestal; Regeneração Natural; Logging; Natural regeneration; Conservation areas; Sustainable forestry.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124623

Exploring Environmental DNA (eDNA) to Assess Biodiversity of Hard Substratum Faunal Communities on the Lucky Strike Vent Field (Mid-Atlantic Ridge) and Investigate Recolonization Dynamics After an Induced Disturbance
Provedor de dados: 5
Autores: Cowart, Dominique; Matabos, Marjolaine; Brandt, Miriam; Marticorena, Julien; Sarrazin, Jozee.
Deep ocean hydrothermal vent ecosystems face physical disturbances from naturally occurring volcanic and tectonic activities and are at increasing risk of mineral resource exploitation, raising concerns about the resilience of endemic biological communities. Following destructive events, efficient and rapidly applicable surveys of organisms are required to monitor the state, evolution and a possible return of these ecosystems to their original baseline status. In this study, we explored the environmental DNA (eDNA) approach as a tool (1) to assess biodiversity of benthic communities associated with deep-sea hard substrata and (2) tracked the recolonization dynamics of benthic invertebrate communities living on the Montségur edifice within the Lucky Strike...
Tipo: Text
Palavras-chave: Natural regeneration; Clearance; Bathymodiolus azoricus; Monitoring; Hard substratum; Active and inactive vent sites.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00600/71176/69515.pdf

Cobertura y estructura de los bosques de mangle en la baja Guajira, Caribe colombiano
Provedor de dados: 20
Autores: Orjuela Rojas, A. M.; Villamil, Carlos A.; Sanjuan-Muñoz, A.
En abril de 2007 se estimó la cobertura y se determinaron los atributos estructurales de los bosques de mangle establecidos en la Baja Guajira. La cobertura del bosque se estimó a partir de imágenes ASTER y de un mosaico de fotografías aéreas. La estructura se determinó sobre transectos de 10 m de ancho y del largo de la franja del bosque de mangle. En cada uno de éstos se identificaron y contaron los árboles de mangle, midiéndoles altura total y diámetro a la altura del pecho (DAP) y se calculó el área basal, la densidad y el Índice de Valor de Importancia (IVI). En la Baja Guajira se estimó una cobertura de mangle de 59.9 ha. Laguncularia racemosa fue la especie más frecuente (87 %) y dominante (0.54 m2 · ha-1), Rhizophora mangle se presentó en el 75 %...
Tipo: Journal Contribution
Palavras-chave: Mangroves; Structures; Natural regeneration.
Ano: 2011
URL: http://hdl.handle.net/1834/4393

Taquara bamboo control as an alternative to recovery of the Araucaria Forest
Provedor de dados: 190
Autores: Sanquetta, Carlos Roberto.
Native bamboos occur abundantly in forests with predominance of Araucaria angustifolia that werehighly disturbed by anthropogenic causes. The occupation of the competitive space by these plants may indicate that there is a dependency relationship between the establishment of tree seedlings and bamboos in the ecosystem. This study aimed at evaluating the establishment of seedlings of tree species that appeared naturally in an area strongly dominated by bamboos in the understory. An  experiment of mechanical control of bambooswas established in the municipality of General Carneiro, southern Paraná State, with 1.00 hectare, following thecompletely randomized design. The results showed that felling of bamboos may be effective to stimulate theappearance of many...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria; Bamboo; Natural regeneration; Seedling establishment Araucária; Taquara; Regeneração natural; Estabelecimento de plântulas.
Ano: 2010
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/118

Fire Ecology and the impact on Amazonian vegetation
Provedor de dados: 190
Autores: Liesenfeld, Marcus Vinicius Athaydes; Vieira, Gil; Miranda, Ires Paula de Andrade.
The aiming of this review is to point out some research fields in fire ecology and its impact on Amazonia vegetation. The incidence of fire on the moist Amazon region sounded a contradiction until recent years. Fire always acted in vegetation structuring, even though independent of human existence. However, fire regimes are changing worldwide, as in the Amazon, motivated by global climate change and climate anomalies. Forest fires impact vegetation differently, depending on the ecosystem, soil type, and plant morphology and age. Many species can respond positively, with survival mechanisms or post-fire re-growth. A better understanding of how Amazon plants respond to fire impact is necessary in order to understand if Amazon moist forest is actually still...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest fires; Natural regeneration; Environmental impact Botânica; Ecologia; Ecologia Aplicada; Ecologia do Fogo; Incêndios Florestais Incêndio florestal; Regeneração da floresta; Impacto ambiental.
Ano: 2016
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1222

Aspectos fitossociológicos e de crescimento de Commiphora leptophloeos no semiárido brasileiro
Provedor de dados: 190
Autores: Silva, Renata Christina Souza; Ferreira, Rinaldo Luiz Caraciolo; Silva, José Antônio Aleixo da; Meunier, Isabelle Maria Jacqueline; Berger, Rute.
Objetivou-se analisar aspectos fitossociológicos e de crescimento de Commiphora leptophloeos (Mart.) J. B. Gillett. no semiárido brasileiro. A espécie foi estudada por meio de pesquisa bibliográfica e dados de 40 parcelas permanentes em área de caatinga, instaladas em 2008 e remensuradas em 2013, estimando-se densidade relativa (DR), frequência relativa (FR), dominância relativa (DoR), valor de importância (VI), regeneração natural (RN), crescimento em área basal (CB) e incremento periódico anual (IPA). A espécie apresentou DR de 0,04 a 12,82%, FR de 0,10 a 9,53 %, DoR de 0,01 a 19,58 %, VI de 0,14 a 10,87% e RN de 0,83 a 2,34 %. O CB foi negativo, quando considerada a mortalidade. O IPA foi de 0,00 a 0,25 cm ano-1. A espécie se destaca por sua DoR, no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Florestais; Manejo Florestal; Ordenamento Florestal Dominância; Incremento periódico; Regeneração natural Dominance; Periodic increment; Natural regeneration.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1224

Variação sazonal e interanual na dinâmica populacional de Croton blanchetianus em uma floresta tropical seca
Provedor de dados: 190
Autores: Nascimento, Izabelle Silva; Santos, Josiene Maria Falcão Fraga dos; Silva, Renata Christina Souza; Santos, Danielle Melo dos; Silva, Kleber Andrade da; Araújo, Elcida de Lima.
O estudo foi realizado em uma área de caatinga em Pernambuco. Buscou-se avaliar a dinâmica de Croton blanchetianus em função da variação de precipitação entre estações climáticas e entre anos. Todos os indivíduos de C. blanchetianus presentes nas parcelas amostradas foram monitorados mensalmente, durante dois anos consecutivos. Houve diferença significativa de novas plântulas de C. blanchetianus entre estações e entre anos. Considerando a variação de precipitação entre anos, o comportamento da população parece ter sofrido pouca influência, pois apenas 14,8% de novas plântulas nessa população podem ser explicados pela variação de precipitação entre estações e entre anos. O poder de explicação da mortalidade pelo modelo linear generalizado foi de 1,4%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Botânica; Engenharia Florestal; Ecologia vegetal Caatinga; Características da população; Regeneração natural Caatinga; Population characteristics; Natural regeneration.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1191

Use of topsoil for restoration of a degraded pasture área
Provedor de dados: 86
Autores: Amaral,Luise Andrade; Pereira,Israel Marinho; Silva,Michele Aparecida Pereira da; Oliveira,Marcio Leles Romarco de; Machado,Evandro Luiz Mendonça; Laia,Marcelo Luiz de.
Abstract: The objective of this work was to evaluate the influence of topsoil thickness, shading and origin when performing environmental restoration in a degraded pasture area. The experiment was conducted in a randomized block design with a factorial (3 x 2 x 2) + 2 layout. Treatments consisted of combinations of topsoil origins (forest at early or middle regeneration stages), topsoil thicknesses (10, 20, or 30-cm superficial soil layer), and presence or absence of 70% shading; with two additional control treatments. Surveys on topsoil physical-chemical attributes and flora and soil coverage were conducted. Good correlation was observed between bulk density and total porosity. Vegetation comprised a total of 2,932 individuals of herbaceous, shrub and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecosystem restoration; Fertility; Natural regeneration; Topsoil application.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101080

The potential of natural regeneration of rocky outcrop vegetation on rupestrian field soils in "Serra do Cipó", Brazil
Provedor de dados: 88
Autores: Medina,Branca Maria Opazo; Fernandes,Geraldo Wilson.
An area's innate potential to regenerate represents a crucial factor for its conservation and management. The seed rain and seed bank are important agents in the regeneration process. Seed banks are particularly important in communities where there is a high proportion of obligate seeders. Rocky outcrops are habitats where most part of the plant species depends on their seeds to reproduce and maintain viable populations. Therefore, seed banks ought to be important in this vegetation physiognomy. We test the hypotheses that the seed bank of the rocky outcrops found in the rupestrian fields of "Serra do Cipó", Brazil, is richer in species and denser than those formed on different vegetation physiognomies neighboring the outcrops. We then compared species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural regeneration; Rocky outcrops; Seed bank; Seedling emergence; "Serra do Cipó".
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400011

Environmental and ecological architects: Guidelines for the Chilean temperate rainforest management derived from the monito del monte (Dromiciops gliroides) conservation
Provedor de dados: 97
Autores: FONTÚRBEL,FRANCISCO E; JIMÉNEZ,JAIME E.
Land use change is one of the main biodiversity threats. Due to this change, natural habitats such as the South American temperate rainforests have been rapidly degraded, fragmented, and lost. Consequently, the management and conservation of the remaining forest is a priority and having an appropriate environmental policy is mandatory for this purpose. Conservation actions in the temperate rainforest have been addressed from an individual species perspective, giving less attention to the ecosystem level conservation. Moreover, conservation-related information has not reflected yet on environmental policy development. We used the case study of the monito del monte (Dromiciops gliroides) to illustrate how our current ecological and conservation knowledge of...
Tipo: Journal article
Palavras-chave: Environmental policy; Management plan; Natural regeneration; Plant-animal mutualism; Rainforest.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200006

Potential of the seedling community of a forest fragment for tropical forest restoration
Provedor de dados: 63
Autores: Viani,Ricardo Augusto Gorne; Rodrigues,Ricardo Ribeiro.
Forest restoration projects are usually planted with a reduced number of species as compared to standing forests, largely due to the low availability of native species in seedling nurseries. In the present study, the potential of the native seedling community as a source of seedlings for forest restoration is analyzed. To do so, the seedling community from a forest fragment located in the southeast of Brazil was evaluated. Individuals (tree and shrub species) up to 30 cm height were measured and identified in 20 4 × 4 m plots. Altogether, 6,136 individuals (17 individuals m-2) belonging to 119 species were sampled. The seedling community showed a spatial heterogeneity with respect to the density of individuals and composition of species, and also a spatial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological restoration; Natural regeneration; Transplants; Seedling production; Forest nurseries.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600008

Seed rain in areas with and without bamboo dominance within an urban fragment of the Atlantic Forest
Provedor de dados: 39
Autores: Grombone-Guaratini,Maria Tereza; Alves,Luciana Ferreira; Vinha,Daniella; Franco,Geraldo Antônio Daher Corrêa.
Understanding the flow of diaspores is fundamental for determining plant population dynamics in a particular habitat, and a lack of seeds is a limiting factor in forest regeneration, especially in isolated forest fragments. Bamboo dominance affects forest structure and dynamics by suppressing or delaying the recruitment of and colonization by tree species as well as by inhibiting the survival and growth of adult trees. The goal of the present study was to determine whether dominance of the bamboo species Aulonemia aristulata (Döll) McClure in the forest understory influences species abundance and composition. We examined the seed rain at two noncontiguous sites (1.5 km apart) within an urban forest fragment, with and without bamboo dominance (BD+ and BD-...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aulonemia aristulata; Dispersal; Human activity; Natural regeneration.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000100008

Consumption of Euterpe edulis fruit by wildlife: implications for conservation and management of the Southern Brazilian Atlantic Forest
Provedor de dados: 42
Autores: SILVA,JULIANO Z. DA; REIS,MAURÍCIO S. DOS.
Abstract: This study aimed to measure the wildlife consumption of Euterpe edulis fruit and use this data to discuss management possibilities. To estimate infructescence fruit volume consumed, collectors were installed in fruit-bearing palms. To characterize consumption from the ground, samples were placed next to fruiting palms. To identify wildlife and their activities, camera traps were installed in infructescences and on the ground. The results suggested that there was a small fruit surplus (1.8 %), and this finding indicated the possibility of a harvest to reduce food for the wildlife. However, recurrent variations in the annual fruit production (21.4 %) were also noted, and suggested that wildlife could tolerate some fruit harvesting. Thus, a harvest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural regeneration; Non-timber forest products; Rain forest; Seed dispersal; Seed predation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100628

Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
Provedor de dados: 48
Autores: Gan,Xiaohong; Xie,Dan; Cao,Lingling.
The sporogenesis and development of gametophytes in Tetracentron sinense Oliv. were studied with light microscopy. The anther has four microsporangia; its primary anther wall consists of an epidermis, an endothecium, one or two middle layers and one glandular tapetum. Simultaneous cytokinesis follows meiosis, forming a tetrahedral tetrad. Mature pollen grains are two-celled at the time of anther dehiscence. Its ovule is anatropous, bitegmic and crassinucellate; the development of the female gametophyte is of the monosporic 8-nucleate Polygonum type. Significantly, some striking features were first found in T. sinense: (1) anther dehiscence occurs soon after the endothecium fibrously thickens and the intersporangial septum degenerates; (2) tapetum...
Tipo: Journal article
Palavras-chave: Tetracentron sinense Oliv; Sporogenesis; Development of gametophytes; Natural regeneration.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400011

Short-term response of water physicochemical parameters to the hydrological rehabilitation of channels in mangroves from Cispata, Colombian Caribbean
Provedor de dados: 50
Autores: Garcés-Ordóñez,Ostin; Rodríguez-Rodríguez,Jenny Alexandra; Espinosa Díaz,Luisa; Escobar Toledo,Fabián; Delvalle Borrero5,Denise.
ABSTRACT The present study evaluated the short-term response (&lt;six months), of water physicochemical parameters to hydrological rehabilitation (HR) of clogged channels in mangrove of Cispata, Colombian Caribbean. Between September 2018 and September 2019, we measure the water physicochemical parameters before and after the HR. The index of marine and coastal water quality (ICAMPFF) in channels and swamps was calculated. Before the HR, in some stations, water quality was very poor, in other inadequate, and in other acceptable; after five months of HR in all stations, water quality became acceptable. After HR, the salinity and temperature of the water within the mangrove decreased to adequate values for the mangrove seedlings. In the short term, HR...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mangrove rehabilitation; Water quality; Natural regeneration; Restoration indicators.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000200151

Vegetation characterization in gully areas as basis for soil conservation
Provedor de dados: 64
Autores: Gomide,Plínio Henrique Oliveira; Silva,Marx Leandro Naves; Castro,Gislene Carvalho de; Soares,Cláudio Roberto Fonsêca Sousa; Oliveira,Anna Hoffmann; Curi,Nilton.
Gullies are an expression of intense environmental degradation, particularly soil and vegetation. The objective of this work was to characterize the natural regeneration and vegetation planted in gully areas in the south of Minas Gerais State, Brazil, so the distribution and occurrence of the species can generate useful information for an adequate diagnosis on the development stage of gullies and for soil conservation. The study involved the characterization of vegetation present in the different segments of the gully areas, the bed, the bare middle third (BMT), middle third with vegetation cover (MTVC), and a fragment of native vegetation (FNV) located closer to the gully areas and adopted as a reference. In the gully area 3, the sampling took place in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water erosion; Natural regeneration; Plant cover.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200006