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| Registros recuperados: 31 | |
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| Oliveira,Leandro Gonçalves; Bispo,Pitágoras da Conceição; Sá,Nívia Custódio de. |
| Relationships among some abiotic factors (temperature, velocity, flow, conductivity, oxy-reduction potential and pH) and the seazonal density of benthic insects (immature forms) of the orders Ephemeroptera, Plecoptera and Trichoptera at the Parque Ecológico de Goiânia, Goiás are studied. An area of 1m² was sampled and abiotic factors were recorded in 4 sites from August/1994 to July/1995. The faunistic composition was 75% Ephemeroptera, 1% Plecoptera and 24% Trichoptera. The data suggest the water velocity and flow as the main factors that determined the aquatic insects abundance. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Aquatic insects; Lotic; Abiotic factors. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400010 |
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| Fransozo, A.; Costa, R.C.; Castilho, A.L.; Mantelatto, F.L.. |
| The spatial and temporal distribution of the shrimp Artemesia longinaris in Fortaleza Bay, northern coast of Sao Paulo State, Brazil, in relation to abiotic factors, was studied. Shrimp samples were obtained on a monthly basis from November 1988 through October 1989 at seven pre-delimited transects on board of a fishing vessel supplied with double otter trawl nets. Depth was recorded at the midpoint of each transect; water and sediment samples were taken to measure salinity, temperature, texture and organic matter content of sediment. The shrimps obtained in the trawls were sorted, identified and 100 g subsample at each transect was separated for measurements (carapace length). A total of 3,083 individuals were obtained. Shrimps were more abundant from... |
| Tipo: Journal Contribution |
Palavras-chave: Abiotic factors; Ecological distribution; Shrimp fisheries; Fishery surveys; Abundance. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1537 |
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| Sarrazin, Jozee; Portail, Marie; Legrand, E.; Cathalot, Cecile; Laes, Agathe; Lahaye, Noe; Sarradin, Pierre-marie; Husson, Berengere. |
| The factors influencing the structure of hydrothermal communities are not necessarily similar across geographical regions and vent fields. In the present study, we explore the role of environmental conditions on vent community structure at local and regional spatial scales, focusing on the assemblages dominated by the engineer species Bathymodiolus azoricus. Their presence in several vent fields on the northern Mid-Atlantic Ridge (MAR) represents a unique opportunity to compare their associated fauna and to better understand large-scale biodiversity patterns. Two types of factors were considered: exogenous ones such as the presence of biogeographical barriers, depth, and distance between sites, and those linked to the intrinsic characteristics of each... |
| Tipo: Text |
Palavras-chave: Intra-field variability; Inter-field variability; Hydrothermal fauna; Abiotic factors; Diversity measures; Macrofauna; Meiofauna; Environmental drivers; Community structure; Habitats. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72661/71671.pdf |
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| Bueno,Alessandra A. P.; Bond-Buckup,Georgina; Ferreira,Bibiana D. P.. |
| The benthic fauna has an important role in the trophic chain of limnic environments, serving as food for fishes and crustaceans. This work aimed to identify and compare, quantitative and qualitatively, the macrobenthic communities from two watercourses in Rio Grande do Sul State. Samplings were done with a Surber sampler, monthly, from September 1999 to August 2000, in one of the creeks forming Tainhas River(29º15'30,2"S, 50º13'12,5"W), around São Francisco de Paula city and in Mineiro Creek (29º30'0,2"S, 50º46'50"W), around Taquara city. At each sampling point, physical and chemical variables of the waters were registered. In the laboratory, the samples were sorted out and the animals identified and quantified. Dissolved oxigen, pH and stream speed were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic factors; Benthic invertebrates; Community structure; Diversity indexes; Rio Grande do Sul. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100014 |
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| Ghuetat, F.; Sellem, F.; Akrout, F.; Brahim, M.; Atoui, A.; Ben Romdhane, M.S.; Daly, Yahia, M. N.. |
| L’étude de l’état environnemental de la lagune de Boughrara a été réalisée deux ans après la mise en service du nouveau pont El Kantara. Les paramètres étudiés dans l’eau (nitrites, nitrates, ammonium, azote, phosphore total, chlorophylle a) et le sédiment (matière organique, faciès sédimentaire) ont été analysés dans trois zones de la lagune appartenants à divers contextes géographiques et environnementaux. Les résultats obtenus ont montré d’évidents signes d’amélioration des conditions générales de cet écosystème. Les distributions spatiotemporelles et saisonnières des paramètres étudiés indiquent que les teneurs trouvées atteignent le seuil d’eutrophisation pas mal de fois mais restent toujours inférieurs à ceux mentionnés par la DGPA en 2000 avant les... |
| Tipo: Journal Contribution |
Palavras-chave: Water quality; Coastal lagoons; Sediments; Abiotic factors; Coastal lagoons; Environmental assessment. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5316 |
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| Boukef, I.; El Bour, M.; Bejaoui, B.; Harzallah, A.; Belhassen, M.; Mrouana, R.; Mejri, S.; Boudabous, A.. |
| La présente étude est effectuée dans le but d’évaluer l’effet des facteurs du milieu sur la distribution des populations bactériennes entériques dans un milieu lagunaire : la lagune de Bizerte. Un échantillonnage saisonnier, (novembre 2004, février 2005, mai 2005 et août 2005), portant sur 41 stations couvrant toute la lagune ont été réalisés. Les analyses bactériologiques effectuées ont concerné l’eau et le sédiment. Les paramètres physico-chimiques de l’eau ont été mesurés in-situ simultanément aux différents échantillonnages. Aussi, les paramètres climatiques ont été fournis par une station météorologique située à proximité de la lagune. Les résultats obtenus ont révélé que les charges en bactéries sont plus importantes dans les sédiments que dans... |
| Tipo: Journal Contribution |
Palavras-chave: Abiotic factors; Ecosystems; Geographical distribution; Pollution monitoring; Public health; Water quality; Geographical distribution; Ecosystems; Public health; Water quality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_6349; Http://aims.fao.org/aos/agrovoc/c_16061. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3696 |
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| Bejaoui, B.; Elbour, M.; Belhassen, M.; Mrouna, R.; Boukef, I.; Mejri, S.; Harzallah, A.; Boudabous, A.. |
| La présente étude est effectuée dans le but d’évaluer l’effet des facteurs du milieu sur la distribution des populations bactériennes entériques dans un milieu lagunaire : la lagune de Bizerte. Un échantillonnage saisonnier, (novembre 2004, février 2005, mai 2005 et août 2005), portant sur 41 stations couvrant toute la lagune ont été réalisés. Les analyses bactériologiques effectuées ont concerné l’eau et le sédiment. Les paramètres physico-chimiques de l’eau ont été mesurés in-situ simultanément aux différents échantillonnages. Aussi, les paramètres climatiques ont été fournis par une station météorologique située à proximité de la lagune. Les résultats obtenus ont révélé que les charges en bactéries sont plus importantes dans les sédiments que dans... |
| Tipo: Journal Contribution |
Palavras-chave: Abiotic factors; Ecosystems; Geographical distribution; Pollution monitoring; Public health; Water quality. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4262 |
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| Almeida, João Paulo Nobre de; Lessa, Bruno Franca da Trindade; Pinheiro, Charles Lobo; Gomes, Fernanda Melo; Medeiros Filho, Sebastião; Silva, Cydianne Cavalcante. |
| The objective of this work was to study the seed germination and seedling growth of A. cearensis (Allemão) A. C. Sm. influenced by seed weight and under different temperature and light conditions. Seeds were individually weighed and divided into three weight classes (light, medium and heavy), and each was subjected to germination tests under two light conditions (presence or absence) and six temperature regimes (20, 25, 30, 35, 40, and 20-30°C). The experiment was established with a completely randomized design in a split-split plot arrangement with four replicates. We determined the first count, final germination percentage and germination speed index. To assess seedling growth, the length and dry mass of the epicotyl and root + hypocotyl axis were also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Fitotecnia cumaru; Abiotic factors; Seed vigour. Produção e beneficiamento de sementes. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32786 |
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| Nacata,Guilherme; Andrade,Renata Aparecida de. |
| Abstract The objective of this research was to analyze the influence of temperature on seed germination and seedling morphology for the S. malaccense and . S. jambosFor germination, 250 seeds of each species, of ripe fruits, were used, which were washed in running water, dried in room condition for 24 hours and disinfected. The seeds were placed in plastic boxes with medium texture vermiculite substrate and submitted to different temperatures: 20, 25, 30, 35ºC and 20-30°C in BOD`S, in a completely randomized design. The variables analyzed were: daily germination percentage, polyembryony and GSI. For morphological characterization, 30 seeds of both each species, submitted to a temperature of 30oC and samples were collected at intervals representative of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed physiology; Abiotic factors; Exotic fruits; Propagation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000302002 |
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| Van Damme, S.; De Winder, B.; Ysebaert, T.J.; Meire, P.. |
| The Scheldt estuary is a vast ecosystem in which powerful natural forces prevail. Tidal action is a key element in the functioning of the estuary. The combination of tide and discharge results in a salinity gradient that is characterized by strong variations in the brackish part. The estuary is a highly turbidsystem. The load of suspended solids is determined by acomplex mix of factors. The dynamic interactions of the physicochemical and morphological parameters lead to a range of various habitats, with highly fluctuating conditions. This, together with the very heavy human impact, both morphological and chemical makes the estuary a very stressed environment in which the survival of plants and animals requires special adaptations. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic factors. |
| Ano: 2001 |
URL: http://www.vliz.be/imisdocs/publications/280694.pdf |
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| Dilkin,Paulo; Mallmann,Carlos A.; Almeida,Carlos A.A. de; Stefanon,Eliza B.; Fontana,Fernanda Z.; Milbradt,Elisane L.. |
| Production of fumonisins B1 (FB1) and B2 (FB2) by two Brasilian strains (LAMIC 2999/96 and 113F) and one American strain (NRRL 13616) of Fusarium moniliforme were evaluated in laboratory cultures subjected to different temperatures (20, 25, and 30ºC), and moisture contents (25, 34, and 42%) on corn substrate. The cultures were grown during 10, 20, 30, 45, and 60 days, totalizing 135 treatments with two repetitions for each one. The fumonisins were extracted with acetonitrile/water. The clean-up with end-capped C18 silica (C18ec) cartridges and fumonisin derivatization with o-phtaldialdeyde were carried out through an automated sample processor system (ASPEC), followed by quantification of the toxins through HPLC. Fumonisin production varied widely,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungi; Fusarium moniliforme; Mycotoxins; Fumonisins; Abiotic factors. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200003 |
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| Registros recuperados: 31 | |
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