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| Carpanezzi, Fernando Bertol; Gualtieri, Sonia Cristina Juliano. |
| Barnyard grass (Echinochloa crusgalli (L.) P. Beauv.) is a herbicide-resistant weed that brings negative impacts to rice crops and threatens floodplains biodiversity worldwide. This study aimed to investigate allelopathic influences of extracts from Pittosporum undulatum Vent. (cheesewood) leaves on barnyard grass. Leachates in concentrations of 20%, 15%, 10%, 5% and 2.5% (w/v), aqueous extracts from powdered leached and non-leached leaves (10%, 7,5%, 5%, 2.5% and 1.25% for both), coumarin solution at 0.6 mM and original Roundup ® in concentration according to the label information were prepared. Petri-dishes germination bioassays, with counting at each 12 hours, allowed to determinate both germinability and germination rate; polyethylene glycol (PEG 6000)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Plant Ecophysiology Cheesewood tree; Echinochloa crusgalli; Agroecosystems; Floodplains Ecologia; Ecofisiologia Vegetal Pau-incenso; Echinochloa crusgalli; Agroecossistemas; Áreas alagáveis. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/599 |
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| Debra L. Wohl; William J. Curry. |
| *Background/Question/Methods*
The birth of a child may include routine use of antibiotics or a delivery by cesarean section. We applaud these medical advances for their direct benefits. However, birthing practices have been shown to disrupt the colonization of the microbial gut in newborns, which may have long term consequences on the development of a child’s immune system resulting in atopies (i.e., asthma, allergies, and eczema). Animal models and other research have been used to demonstrate that not only the presence, but also the community composition of the gut microbiota, is essential for normal immune development. Furthermore, it has been established that there are differences in the intestinal microbiota of children... |
| Tipo: Presentation |
Palavras-chave: Ecology; Microbiology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3685/version/1 |
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| Howard Rachlin; Bryan A. Jones. |
| The amount of their own monetary reward that undergraduate participants claimed they were willing to forgo, in order to give $75 to another person, decreased hyperbolically as social distance increased between the participant and the other person. Relatives tended to be ranked at closer social distances than were non-relatives. However, even at the same social distance, participants were willing to forgo significantly more money for the benefit of relatives than for the benefit of non-relatives. These results imply that altruism is determined by factors in addition to social distance. |
| Tipo: Manuscript |
Palavras-chave: Ecology; Evolutionary Biology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1565/version/1 |
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| Polfus, Jean L.; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; jeanpolfus@gmail.com; Manseau, Micheline; Office of the Chief Ecosystem Scientist, Parks Canada, Gatineau, Québec, Canada; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; Micheline.Manseau@pc.gc.ca; Bayha, Walter; Délı̨nę Land Corporation, Délı̨nę, Northwest Territories, Canada; nihtla321@gmail.com; Rice, Keren; Department of Linguistics, University of Toronto, Toronto, Ontario, Canada; rice@chass.utoronto.ca; Wilson, Paul; Biology Department, Trent University, Peterborough, Ontario, Canada; pawilson@trentu.ca. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Aboriginal; Biocultural diversity; Biodiversity; Caribou; Collaborative research; Ecology; First Nation; Genetic variation; Indigenous communities; Population genetics; Population structure; Rangifer tarandus; Resource management; Social-ecological systems; Traditional knowledge. |
| Ano: 2016 |
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| Catarino, L.; Martins, E.S.; Pinto Basto, M.F.; Diniz, M.A.. |
| A Checklist of Guinea-Bissau’s vascular flora is presented, based on the inventory of herbarium material and on recent collections. In addition to the name, we cite for each taxon the basionym and synonyms, the life form and habitat, as well as the chorology, Raunkiaer’s biological type, phenology and vernacular names if known. 1507 specific and infra-specific taxa were recorded, of which 1459 are autochthonous, belonging to 696 genera. This shows a higher diversity than the 1000 species estimated so far. In the autochthonous flora there are 22 species of Pteridophyta from 14 families; 1041 taxa of Dicotyledons from 107 families, and 396 taxa of Monocotyledons belonging to 33 families. Three taxa are probably endemic to the country. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Flora; Phytogeography; Ecology; Chorology; Vernacular names; Guinea-Bissau. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/526088 |
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| Yusong Cao; Huiming Wang. |
| Biological invasion has become a serious global environmental problems and been considered as an important component of global change^1-2^. Invasions by alien species can have an impact at several levels of ecological complexity from genes to ecosystems^3-4^. Invasive alien species had seriously threated the biodiversity and natural ecosystems in China^5^, and caused economic losses by more than US$7 billion every year^6^. Alternanthera philoxeroides, commonly known as Alligator weed, is an invasive amphibious plant^7^. The effect of physical methods such as mechanical or artificial salvage, removal of A. philoxeroides were very limited. Moreover, these measure should be carried out very carefully or would easy lead to its rebound^8^. The mainly biological... |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Ecology; Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5267/version/1 |
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| Lutinski, Cladis Juliana; Lutinski, Junir Antonio; Costa, Maria Katia Matiotti da; Garcia, Flavio Roberto Mello. |
| Realizou-se a análise faunística de gafanhotos coletados em três constituições vegetais da Flona de Chapecó. Coletas semanais foram realizadas em áreas de eucalipto, mata nativa e pinus durante o período de dezembro de 2003 a dezembro de 2004. Utilizaram-se armadilhas do tipo “pitfall”, rede de varredura, guarda-chuva entomológico e “malaise”. A fauna encontrada nas diferentes áreas foi caracterizada por meio dos índices de abundância, constância, dominância e frequência. Dezoito espécies foram comuns para as três áreas. As espécies Staurorhectus logicornis logicornis, Cylindrotettix sp. e Ommexecha virens ocorreram apenas em eucaliptos e pínus, enquanto, Scotussa lemniscata e Zoniopoda tarsata ocorreram para eucaliptos e mata nativa enquanto Amblytropidia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Diversity; Acridinae; Sustainable development Ecologia; Diversidade; Acridinae; Desenvolvimento sustentável.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/191 |
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| Espinosa, Luisa F.; Ramírez, Gustavo; Campos, Néstor H.. |
| En los sedimentos superficiales aledaños al manglar, de cuatro estaciones dentro de la Ciénaga Grande de Santa Marta y una estación en la Bahía de Chengue, se analizaron las concentraciones de seis residuos de plaguicidas organoclorados (lindano, heptacloro, aldrin, pp'DDE, pp'DDD y pp'DDT), mediante la técnica de cromatografía gas-líquido. Se realizaron muestreos trimestrales entre marzo y diciembre de 1993, tratando de abarcar las principales épocas climáticas de la región (seca, lluviosa menor, seca menor y lluviosa mayor). Mediante análisis de varianza multifactorial se encontraron diferencias significativas solamente en las concentraciones de lindano, heptacloro y pp'DDE, entre las diferentes épocas climática; los otros tres compuestos (aldrin, pp'DDD... |
| Tipo: Journal Contribution |
Palavras-chave: Ecology; Chemical analysis; Salinity effects; Gas chromatography; Organic matter; Coastal lagoons; Estuaries; Mangroves; Ecology; Organic matter; Estuaries; Gas chromatography; Coastal lagoons; Mangroves; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_5387; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_11097; Http://aims.fao.org/aos/agrovoc/c_1697; Http://aims.fao.org/aos/agrovoc/c_16190. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/3804 |
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| Lasha-Lynn H. Salbosa; Dr. Christopher A. Lepczyk. |
| The ecosystem altering impacts of feral pigs have been widely documented around the world. However, a general framework for their control and management has been lacking, especially in island ecosystems. One reason for this lack of management is that we have little knowledge of how pigs move through different island ecosystems, especially ones that are topographically challenging such as Hawai‛i. With recent advances in telemetry and movement modeling, it is now becoming practical to understand where these large introduced animals are moving and how they are using habitat. Hence, the primary goal of this study is to understand feral pig movement in terms of terrain, slope restrictions, and distance traveled beyond a natal site, within an... |
| Tipo: Presentation |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3903/version/1 |
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| Ahmad Reza Ommani; Mohammad Chizari. |
| The purpose of this research was analysis Sustainable Water Resources Management (SWRM) in agriculture of Khouzestan Province of Iran. The research method was quantitative research. Total population of experts in the study included all agricultural extension experts (N=96) of Agricultural-Jihad Organization of Khuzestan Province, Iran. Based on frequency of respondents about importance rate of supportive policies regarding SWRM in agriculture, 70.8% of respondents stated that encouraging farmers for using sustainable methods had very high importance. In reference to the frequency of respondents about extension system roles on realization of SWRM dimensions in agriculture, 52.8% of respondents stated conservation of water resources had very high importance... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/4046/version/1 |
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| Sánchez,Begoña; Prado,José Luis; Alberdi,María Teresa. |
| To reconstruct the diet and habitat preference of fossil horses, we measured the carbon and oxygen isotope composition of 35 bone and tooth samples of Equus (Amerhippus) neogeus Lund, Hippidion principale (Lund), and Hippidion devillei (Gervais) from 10 different Pleistocene localities in the Pampean region (Argentina). To compare the three species by stratigraphic age, we divided the samples into three groups: lower Pleistocene, middle-late Pleistocene and latest Pleistocene. Samples of Hippidion devillei from the lower Pleistocene were more homogeneous, with δ13C values ranging between -11.73 to -9.79‰. These data indicate a diet exclusively dominated by C3 plants. In contrast, Hippidion principale and Equus (Amerhippus) neogeus from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equus (Amerhippus); Hippidion; Paleodiet; Ecology; Extinction; Pleistocene; Papean region; South America. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200012 |
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| Shi Huang. |
| There exists a remarkable correlation between genetic distance and time of species divergence as inferred from fossil records. This observation has provoked the molecular clock hypothesis. However, data inconsistent with the hypothesis have steadily accumulated in recent years from studies on extant organisms. Here the published DNA and protein sequences from ancient fossil specimens were examined to see if they would support the molecular clock hypothesis. The hypothesis predicts that ancient specimens cannot be genetically more distant to an outgroup than extant sister species are. Also, two distinct ancient specimens cannot be genetically more distant than their extant sister species are. The findings here did not support these predictions.... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1676/version/1 |
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| Mohit Bhardwaj; Leena Bharadwaj; Kritika Trigunayat; Madan Mohan Trigunayat. |
| Several organism show a rhythm based behavior in their life. Mosquitoes are surviving successfully since ancient time on earth while lots of biological creatures have been extinct. Thus it is interesting to study their population load. Climatic conditions affect mosquito population significantly so on the basis of malaria cases their population is estimated in present study in Indian geographical scenario. In this study it was found that their annual population load show a scientific rhythm. A schematic wave form representation is also presented here to show mosquito population load. This study will be helpful in malaria vector eradication and health care policies. 
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| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4569/version/1 |
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| Mohit Bhardwaj; Leena Bharadwaj; Kritika Trigunayat; Madan Mohan Trigunayat. |
| Several organisms show a rhythm based behavior in their life. Mosquitoes are surviving successfully since ancient time on earth while lots of biological creatures have been extinct. Thus it is interesting to study their population load. Climatic conditions affect mosquito population significantly so on the basis of malaria cases their population is estimated in present study in Indian geographical scenario. In this study it was found that their annual population load show a scientific rhythm. A schematic wave form representation is also presented here to show mosquito population load. This study will be helpful in malaria vector eradication and health care policies. 
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| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4569/version/2 |
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| Registros recuperados: 900 | |
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