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| Registros recuperados: 69 | |
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| Velho, Luiz Felipe Machado; Brão, Arianne Francielle Silva; Lansac-Tôha, Fernando Miranda; Buosi, Paulo Roberto Bressan; Meira, Bianca Ramos de; Cabral, Adalgisa Fernanda; Lansac-Tôha, Fábio Amodêo. |
| This study examined temporal and spatial (vertical) variations of composition, richness and abundance of the planktonic ciliates community in an urban and eutrophic lake, as well as identified the limnological factors involved in determining the patterns observed. To this end, samples of ciliates and measures of limnological variables were taken at different depths and hydrological periods. 35 ciliate species were identified, among which 14 species occurred in all periods and strata, being Prostomatida the most specious, followed by Gymnostomatida, Oligotrichida, Peritrichida, and Scuticociliatida. The patterns found for composition, abundance and species richness evidenced a vertical and temporal variation of these attributes. However, in general the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecologia - Limnologia / Ecologia de comunidades Protist; Density; Species compositio; Richness; Plankton Ecologia de Protoplâncton. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/18579 |
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| Santos,Alexandre Clistenes de A.; Caramaschi,Érica P.. |
| The rio Santo Antônio is a perennial lowland stream in the Brazilian semi-arid region, and is the main tributary of the upper rio Paraguaçu, an important drainage of the Chapada Diamantina. The temporal variation of the fish composition and abundance in a stretch of the middle course of the river was evaluated. Sampling was carried out monthly between August 1998 and July 1999, using standardized gear and techniques. Data on water and air temperature, water transparency, maximum and mean depth, width and area of the channel, and flow were recorded on each fish sampling occasion. Univariate and multivariate statistical analyses were employed in order to detect significant temporal differences in environmental parameters and fish abundance. Temperature,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chapada Diamantina; Ichthyofauna; Richness; Seasonality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100014 |
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| Soares,Stela de Almeida; Suarez,Yzel Rondon; Fernandes,Wedson Desidério; Tenório,Patrícia Mara Soares; Delabie,Jacques Hubert Charles; Antonialli-Junior,William Fernando. |
| Temporal variation in the composition of ant assemblages (Hymenoptera, Formicidae) on trees in the Pantanal floodplain, Mato Grosso do Sul, Brazil. In this paper we investigate how seasonal flooding influences the composition of assemblages of ants foraging on trees in the Pantanal of Mato Grosso do Sul. During the flood in the Pantanal, a large area is covered by floods that are the main forces that regulate the pattern of diversity in these areas. However, the effects of such natural disturbances in the ant communities are poorly known. In this sense, the objective of this study was to evaluate the effect of temporal variation in assemblages of ants foraging on trees in the Pantanal of Miranda. Samples were collected during a year in two adjacent areas,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ants; Flood and non-flood season; Insecta; Richness; Species composition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000100013 |
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| Rodrigues,Francílio da Silva; Prudente,Ana Lúcia da Costa. |
| This study records and analyzes the diversity and structure of a snake assemblage in a transition area between Cerrado and Caatinga, in the municipality of Castelo do Piauí, state of Piauí, comparing the distribution and similarity of the species composition with other open localities already studied in Brazil. We used three complementary sampling methods: time constrained search (TCS), pitfall traps with drift fences (PFT), and incidental encounters (IE). During the TCS and PFT, 912 hours/observer and 6,468 days/trap were used, respectively. We estimated 23 species of snakes for the locality, although only 19 species were recorded. Philodryas nattereri Steindachner, 1870 (n = 10), Liophis poecilogyrus (Schlegel, 1837) (n = 9), Liophis viridis Günther,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Composition; Ecotones; Richness; Similarity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400005 |
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| Bailey, Sarah A.; Brown, Lyndsay; Campbell, Marnie L.; Canning‐clode, João; Carlton, James T.; Castro, Nuno; Chainho, Paula; Chan, Farrah T.; Creed, Joel C.; Curd, Amelia; Darling, John; Fofonoff, Paul; Galil, Bella S.; Hewitt, Chad L.; Inglis, Graeme J.; Keith, Inti; Mandrak, Nicholas E.; Marchini, Agnese; Mckenzie, Cynthia H.; Occhipinti‐ambrogi, Anna; Ojaveer, Henn; Pires‐teixeira, Larissa M.; Robinson, Tamara B.; Ruiz, Gregory M.; Seaward, Kimberley; Schwindt, Evangelina; Son, Mikhail O.; Therriault, Thomas W.; Zhan, Aibin; Hussey, Nigel. |
| Aim The introduction of aquatic non‐indigenous species (ANS) has become a major driver for global changes in species biogeography. We examined spatial patterns and temporal trends of ANS detections since 1965 to inform conservation policy and management. Location Global. Methods We assembled an extensive dataset of first records of detection of ANS (1965–2015) across 49 aquatic ecosystems, including the (a) year of first collection, (b) population status and (c) potential pathway(s) of introduction. Data were analysed at global and regional levels to assess patterns of detection rate, richness and transport pathways. Results An annual mean of 43 (±16 SD) primary detections of ANS occurred—one new detection every 8.4 days for 50 years. The global rate of... |
| Tipo: Text |
Palavras-chave: Aquatic non-indigenous species; Biological invasions; Detection rate; Inventory; Long-term dataset; Population status; Richness; Spatial patterns; Temporal trends; Transport pathways. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00653/76496/77661.pdf |
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| Ramos,Geraldo José Peixoto; Santana,Lucineide Maria; Medina,Anderson Matos; Bicudo,Carlos Eduardo de Mattos; Branco,Luis Henrique Zanini; Moura,Carlos Wallace do Nascimento. |
| ABSTRACT Knowledge of algal and cyanobacterial diversity of phytotelmata remains poorly-known, especially for bromeliads from different vegetation formations. We investigated the microalgae communities of four species of tank bromeliads from different vegetation formations in Bahia State, Northeast Brazil, highlighting the composition, richness and diversity of taxa. Sampling of water stored in bromeliads was carried out quarterly between 2014 and 2016, and abiotic variables and morphometric attributes of bromeliads were measured. A total of 89 taxa of algae and cyanobacteria were recorded for the four bromeliad species studied. The microalgae communities of the phytotelmata varied among vegetation formations, with one tank bromeliad, Alcantarea nahoumii,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Ecology; Microalgae; Microhabitat; Phytotelm; Richness; Tank bromeliads. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400567 |
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| Navia,Andrés Felipe; Mejía-Falla,Paola Andrea; Hleap,José Sergio. |
| ABSTRACT In order to investigate zoogeographical patterns of the marine elasmobranch species of Colombia, species richness of the Pacific and Caribbean and their subareas (Coastal Pacific, Oceanic Pacific, Coastal Caribbean, Oceanic Caribbean) was analyzed. The areas shared 10 families, 10 genera and 16 species of sharks, and eight families, three genera and four species of batoids. Carcharhinidae had the highest contribution to shark richness, whereas Rajidae and Urotrygonidae had the greatest contribution to batoid richness in the Caribbean and Pacific, respectively. Most elasmobranchs were associated with benthic and coastal habitats. The similarity analysis allowed the identification of five groups of families, which characterize the elasmobranch... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Batoids; Beta diversity; Historical biogeography; Richness; Sharks; Vagility. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200215 |
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| Registros recuperados: 69 | |
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