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| Registros recuperados: 414 | |
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| Mendes-Oliveira,Ana Cristina; Santos,Paulo Guilherme Pinheiro dos; Carvalho-Júnior,Oswaldo de; Montag,Luciano Fogaça de Assis; Lima,Renata Cecília Soares de; Maria,Suzanne Lúcia Silva de; Rossi,Rogério Vieira. |
| The impact of fire and edge effects on the community of small non-volant mammals was investigated in transitional Amazon forest within a matrix of soybean plantations. The animals were live trapped on 24 line transects, of which 16 were distributed in unburned areas and 8 in a burned area. A total of 11 species was recorded, including six rodents and five marsupials. The abundance and richness of small mammals appeared to decrease in burned areas, although this impact appeared to mask edge effects. In the absence of fire impacts, a positive relationship was found between mammal abundance and the distance from the forest edge. The impact of the edge effect on the diversity of small mammals appears to be influenced by the type of anthropogenic matrix and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cricetidae; Didelphidae; Diversity; Soybean matrix; Experimental fire. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300004 |
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| SANTOS,LIDIANE F. DOS; LANA,ROGÉRIO P.; SILVA,MARLIANE C.S. DA; VELOSO,TOMÁS G.R.; KASUYA,MARIA CATARINA M.; RIBEIRO,KARINA G.. |
| Abstract Effective microorganisms (EM) are inoculants formed by fungi and bacteria isolated from soil. EM are commonly used by farmers on agronomic crops to stimulate plant growth, but their composition and their benefits has been controverted. This study aimed to analyze the diversity of microorganisms growing in three EM inoculants, as well as to evaluate their efficiency in the germination of palisade grass seeds. The total DNA of the three EM inoculants was extracted, the 16S rRNA and ITS genes were amplified by PCR and sequenced on the Illumina MiSeq platform. Germination tests were conducted with three type of the EM, in three concentration and two times of the immersion. The bacterial group was the most abundant in EM, followed by fungi. Bacterial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Dormancy; Sequencing; Sulfuric acid. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000201002 |
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| Ferreira,Aila Soares; Rocha,Isabel Medeiros dos Santos; Bellini,Bruno Cavalcante; Vasconcellos,Alexandre. |
| ABSTRACT The spatial distribution of abiotic resources and environmental conditions can vary at small scales within terrestrial ecosystems, influencing the composition of soil fauna. Epiedaphic springtails (Collembola) of a semiarid Caatinga ecosystem were studied to determine if factors related to vegetation structure, such as species richness, aerial biomass, litterfall, and soil characteristics (pH, granulometry and soil organic matter), influence species richness and abundance of this group. A total of 5,513 individuals were collected of 15 species distributed in 13 genera and 9 families. The most abundant species were Temeritas sp., with 2,086 (38% of the total abundance) individuals, and Neotropiella meridionalis (Arlé, 1939), with 1,911 (35% of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Diversity; Soil dynamics; Soil mesofauna; Neotropical Region. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100324 |
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| Qiu,Shanlian; Wang,MK; Wang,Fei; Chen,Jichen; Li,Xiaoyan; Li,Qinghua; Lin,Cheng; Lin,Xinjian. |
| A field experiment established in 1980 was conducted to evaluate the effects of open drainage ditch applied for water removal on bacterial and fungal communities of cold waterlogged paddy soils in 2011. In this experiment, traditional plate counting and temperature gradient gel electrophoresis were employed to characterize the abundance and diversity of soil bacterial and fungal communities. Four different distances from the open drainage ditch, 5, 15, 25 and 75 m with different degrees of drainage were designed for this study. Maximum populations of culturable aerobic bacteria and fungi were at 15-m distance while minimum populations were at 75-m distance. Significant differences (p < 0.05) in fungal populations were observed at all distances from open... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Bacterial and fungal communities; Diversity; Open drainage ditch. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300050 |
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| Braga,Cesar França; Beasley,Colin Robert; Isaac,Victoria Judith. |
| Data on macrofauna density and diversity, and the height and density of Spartina brasiliensis, were obtained from salt marsh beds of a tropical estuary in northern Brazil. Sampling was carried out at four distinct times of the year, during the wet and dry seasons and in the transition periods between these. Sampling was also carried out in salt marshes of three size classes, small, medium and large. Variables were analyzed in relation to time of year and salt marsh size class. Overall, 46 taxa were found, with polychaetes, isopods and the gastropod Neritina virginea dominating the fauna. Macrofauna density and diversity were positively correlated with culm density, indicating a possible role in protection from predation. All the three variables were higher... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrofauna; Spartina; Density; Diversity; Seasonality; Tropical estuary. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600013 |
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| Butakka, Cristina Márcia de Menezes; Universidade do Mato Grosso; Trivinho-Strixino, Susana; Universidade Federal de São Carlos; Pinha, Gisele Daiane; Universidade Estadual de Maringá; Takeda, Alice Michiyo; Universidade Estadual de Maringá. |
| To investigate the emergence of Chironomidae in different habitats of a floodplain lake of the upper Paraná river floodplain, four collection points were established: marginal regions (one with numerous macrophytes species, other dominated by only Polygonum sp.), central region and linking channel. Adults were captured by surface emergence traps assembled every three months, from May 2001 to March 2002. The traps remained for a period of about 48 hours, obtaining quantitative data for richness and abundance. 944 adults distributed into three subfamilies and 40 taxa were captured. The taxa identified at the species level were: Goeldichironomus neopictus, G. petiolicola, G. maculatus, Tanytarsus ligulatus, Parachironomus atroari, P. guarani and P. cayapo.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic insects; Habitats; Neotropical floodplain; Diversity; Emergence traps Ecologia e Biodiversidade. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19323 |
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| Piovesan,Bruna; Padilha,Aline C; Botton,Marcos; Zotti,Moisés João. |
| ABSTRACT Strawberry cultivation under semi-hydroponic conditions has increased in the Southern region of Brazil since it facilitates management, besides avoiding weather adversities, pests and diseases. However, protected environment can hamper the access of pollinator insects, essential for crop productivity. This work aimed to know the entomofauna associated with strawberry cultivar Albion cultivated under semi-hydroponic conditions and to identify potential species of native pollinating bees. Insects were captured at different times of the day (9:30 a.m., 12:30 p.m. and 3:30 p.m.) in three commercial crops located in Bento Gonçalves and Farroupilha, Rio Grande do Sul. In each study area, three days of sampling were carried out during January 2017. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria x ananassa; Pollination; Agriculture; Diversity; Native bees. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000300324 |
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| Carrenho,Rosilaine; Gomes-da-Costa,Sandra Maria. |
| Three forest reserves, with highly degraded areas, are open to visitors in Maringá, Paraná, Brazil. Impact caused by tree cutting, heavy traffic and visitors on the establishment of arbuscular mycorrhizal fungi (AMF) was evaluated in two areas with different degradation stages of the Dr. Luis Teixeira Mendes Forest Garden, a remnant of semideciduous forest. Soil samples were removed from three locations within each area; spores were isolated from the soil by wet sieving and sucrose centrifugation and mounted on permanent slides. Spores were counted and identified taxonomically under a microscope. Diversity, dominance, equitability and similarity indexes were calculated from abundance data. The degraded area had the highest number of spores and featured... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Glomeromycetes; Forest fragmentation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200013 |
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| Marimon,Beatriz Schwantes; Felfili,Jeanine Maria; Lima,Edson de Souza; Duarte,Wânia M. Gonçalves; Marimon-Júnior,Ben Hur. |
| Natural regeneration and structure and their relationship to environmental variables were studied in three sections of a gallery forest, in Eastern Mato Grosso, Brazil (14º43′S and 52º21′W). The assumption was that natural regeneration is constrained by environmental determinants at all stages of development of the tree community. The objective was to analyse the forest structure and to verify the relationship between species distribution and abundance at different stages of regeneration and environmental variables. In each section, 47 contiguous (10x10m) permanent plots were established to sample trees (gbh≥15cm), following a systematic design. Seedlings (0.01 to 1m height), saplings (1.01 to 2m) and poles (from 2.01m height to gbh<15cm) were sampled... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Diversity; Riparian forest; Soils; Tropics. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000100014 |
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| Assunção,Vivian Almeida; Silva,Danilo Muniz da; Dalponti,Guilherme; Sartori,Ângela Lúcia Bagnatori; Casagrande,José Carlos; Mansano,Vidal de Freitas. |
| ABSTRACT We characterized taxonomic and functional differences between two vegetation physiognomies in the Brazilian Chaco, namely chaco woodland (CW) and chaco forest (CF), in order to understand which abiotic and biotic mechanisms underlie the establishment of different physiognomies. We characterized the vegetation physiognomies by comparing woody species composition, richness and diversity and functional diversity between CW and CF plots. We also measured soil variables to characterize abiotic factors related to the different physiognomies. Species richness and diversity and soil nutrient values were higher in CF. Leaf succulence and nitrogen content were higher in CW, while height, leaf area, and specific leaf area were higher in CF. The standardized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Functional traits; Seasonally dry forests; Plant community; Physiognomy; Soil fertility. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400746 |
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| Mothes,Beatriz; Campos,Maurício Alves de; Lerner,Cléa Beatriz; Ferreira-Correia,Maria Marlúcia. |
| Three species of Halichondrida, Dragmacidon reticulatus (Ridley & Dendy, 1886) (Axinellidae), Myrmekioderma rea (Laubenfels, 1934) (Desmoxyidae) and Topsentia ophiraphidites (Laubenfels, 1934) (Halichondriidae), collected from 30 to 184 m depths, were recorded for the first time from State of Maranhão, north-northeast coast of Brazilian shelf. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porifera; Diversity; Distribution; West Atlantic. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000200006 |
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| Figueira, Adriana França; Universidade Federal Rural do Rio de Janeiro; Berbara, Ricardo Luis Louro; Universidade Federal Rural do Rio de Janeiro; Pimentel, João Pedro; Universidade Federal Rural do Rio de Janeiro. |
| Estudou-se a comunidade de nematoides do solo em quatro sistemas de manejo no Sistema Integrado de Produção Agroecológica (SIPA): pasto, capoeira, figo com Paspalum notatum e horta. As amostras de solo foram coletadas a cada quatro meses durante um ano. A comunidade de nematoides foi identificada e descrita com os parâmetros: riqueza de famílias, diversidade de Shannon-Weaner, de dominância de Simpson, além da diversidade trófica e dominância trófica. Os fitoparasitas e bacteriófagos dominaram as comunidades de nematoides nas áreas. Os onívoros foram menos abundantes em todos os sistemas estudados. O sistema pasto apresentou maior diversidade de famílias de nematoides enquanto que, no sistema capoeira se encontraram valores de diversidade baixos, porém... |
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Palavras-chave: Termo1 Solos; Termo2 agronomia Microfauna; Sistemas de cultivo; Diversidade Microfauna; Crop system; Diversity. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4716 |
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| Kunz, Sustanis Horn; UFV; Ivanauskas, Natália Macedo; UFV; Martins, Sebastião Venâncio; UFV. |
| Diante da intensa fragmentação e da escassez de estudos realizados em cerradão, este trabalho apresenta a estrutura da comunidade arbórea de um trecho desta fitofisionomia no Planalto Central. Foram demarcados todos os indivíduos lenhosos que apresentaram diâmetro em nível do solo ≥ 5 cm, em dez parcelas de 20 x 50 m, perfazendo área amostral de 1 ha. Foram registrados 2.496 indivíduos, distribuídos em 95 espécies, e Protium heptaphyllum (Aubl.) Marchand apresentou maior valor de importância na comunidade, principalmente pela alta densidade. O índice de Shannon (3,85) e o índice de equabilidade de Pielou (0,84) foram considerados altos e semelhantes a outros encontrados em áreas próximas à deste estudo. |
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Palavras-chave: 2.00.00.00-6 Ciências Biológicas cerrado; Estrutura da comunidade vegetal; Diversidade Botânica cerrado; Plant community structure; Diversity. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1625 |
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| MÜLLER,SANDRA CRISTINA; WAECHTER,JORGE LUIZ. |
| As sinúsias herbáceas e arbustivas são componentes de comunidades florestais pouco pesquisados nas regiões tropicais e subtropicais. Neste trabalho foram estudadas a composição florística e a estrutura fitossociológica destas sinúsias em uma floresta arenosa (restinga) da Planície Costeira do Rio Grande do Sul, Brasil. Os dados fitossociológicos foram obtidos em 30 parcelas de 2 x 2 m. Em cada parcela anotou-se a presença e a altura máxima das espécies herbáceas e arbutivas, e a cobertura foi estimada pela escala de Causton. A composição florística total da área compreende 61 espécies, 52 gêneros e 33 famílias. As famílias que apresentaram mais de duas espécies foram: Poaceae, Commelinaceae, Orchidaceae, Piperaceae, Rubiaceae e Asteraceae. As formas de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbs; Shrubs; Restinga; Diversity; Life-forms. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000400005 |
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| Romero Gómez, Guillermo. |
| Se realizó un estudio faunístico de las especies de Bruchidae y de sus plantas hospederas para el estado de Morelos, para lo cual se realizaron colectas de estos insectos por medio de una red de golpeo, asi como colecta de plantas hospederas en los años 2010 y 2011. La información se complementó con registros de la base de datos BRUCOL. Se registró un total de 125 especies de brúquidos, las cuales se encuentran distribuidas en 19 géneros; de los cuales Acanthoscelides presentó el mayor número de especies (49), seguido de los géneros Merobruchus y Sennius con diez especies cada uno, los géneros Amblycerus y Zabrotes (9), Megacurus (8), Stator (7), Mimosestes (6), Meibomeus (5), Algarobius y Dahlibruchus (2); finalmente de los géneros Callosobruchus,... |
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Palavras-chave: Gorgojos; Plantas hospederas; Diversidad; Taxonomía; Seed beetles; Host plants; Diversity; Taxonomy; Entomología y Acarología; Doctorado. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1876 |
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| Registros recuperados: 414 | |
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