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| Registros recuperados: 115 | |
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| JULIÃO,Genimar Rebouças; ALMADA,Emmanuel Duarte; COSTA,Flávia Regina Capellotto; CARNEIRO,Marco Antônio Alves; FERNANDES,G. Wilson. |
| ABSTRACT Topographic gradients in terra firme forests are associated with pronounced changes in soil texture, soil nutrients and distance to the water-table, thereby creating different hydric and nutritional conditions for plants and their associated herbivore community. The aim of this study was to investigate galling species and host plant richness and gall species composition across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest. Nineteen 250 x 3 m plots were randomly sampled in the valley, slope, plateau-slope transition, and plateau habitats in terra firme forests. All individual dicotyledonous plants 1 to 3 meters high were examined for the presence of insect galls. Galling species and host plant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Habitat stress; Soil nutrients; Species diversity; Terra firme forest; Topographic gradient. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300237 |
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| Rankin-de-Mérona,Judy M.; Prance,Ghillean T; Hutchings,Roger W.; Silva,Marlene Freitas da; Rodrigues,William A.; Uehling,Marie E.. |
| A large-scale inventory of trees > 10cm DBH was conducted in the upland "terra firme" rain forest of the Distrito Agropecuário da SUFRAMA (Manaus Free Zone Authority Agricultural District) approximately 65Km north of the city of Manaus (AM), Srasil. Thegeneral appearance and structure of the forest is described together with local topography and soil texture. Thepreliminary results of the Inventory provide a minimum estimate of 698 tree species in 53 families in the 40Km radius sampled, including 17 undescribed species. Themost numerically abundant families, Lecythidaceae, Leguminosae, 5apotaceae and Burseraceae as also among the most species rich families. One aspect of this diverse assemblage is the proliferation of species within certain genera,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest inventory; Upland rain forest; Amazon floristic composition; Species diversity; Plot similarity. |
| Ano: 1992 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671992000400493 |
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| MARTINS,Caleb Califre; SANTOS,Rodrigo Souza; SUTIL,Weidson Plauter; OLIVEIRA,José Fernando Araújo de. |
| ABSTRACT Coffea canephora (Conilon coffee) has great economic importance for the state of Acre, in northern Brazil. The use of insecticides in this crop has increased considerably in recent years. In order to find species of green lacewing (Chrysopidae, Neuroptera) with potential for use in biological pest control in coffee plantations, we sampled green lacewings during one year in an experimental plantation of Conilon coffee in Acre, in order to assess the diversity, abundance and seasonal occurrence of Chrysopidae species. Samplings were carried out weekly using an entomological net. Overall, 1079 specimens of seven green lacewing species were collected: Ceraeochrysa cincta, Ceraeochrysa claveri, Ceraeochrysa cubana, Ceraeochrysa everes, Chrysoperla... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neuropterida; Chrysopoidea; Species diversity; Rubiaceae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300173 |
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| Oliveira,Lukiel dos Santos; Andrade,Bianca Ott; Boldrini,Ilsi Iob; Moço,Maria Cecilia de Chiara. |
| ABSTRACT Aquatic ecosystems support species diversity, and knowledge of plant communities is essential for wetland conservation programs. This study provides a checklist of aquatic vascular plants of South Brazil and establishes their floristic affinities with bordering South America phytogeographical domains. The checklist was based on 52 sources, including 35 floristic lists, 17 regional taxonomic studies, and information from an electronic database on wetlands of South Brazil. Floristic similarities with published checklists for neighbouring regions were assessed. A total of 780 species distributed in 277 genera and 85 families of vascular plants were reported for South Brazil. Families with higher species richness were Cyperaceae (128), Poaceae (102),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floristic; Macrophyte distribution; Plant diversity; Species diversity; Wetland conservation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400709 |
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| Velázquez,María Silvana; Stürmer,Sidney Luiz; Bruzone,Clara; Fontenla,Sonia; Barrera,Marcelo; Cabello,Marta. |
| ABSTRACT Knowledge of the occurrence and diversity of arbuscular mycorrhizal fungi (AMF) in National Parks is essential for the establishment of policies for conservation. The aim of this study was to characterize the AMF communities in the Patagonian Altoandina region in Nahuel Huapi National Park, Argentina. We surveyed AMF spores associated with the rhizospheres of 9 plant species in the Patagonian Steppe (PS), Challhuaco Hill (ChH), Catedral Hill (CH), and Tronador Hill (TH) regions and detected a total of 27 Glomeromycota species. Acaulospora laevis was dominant at all sites. The AMF community was dominated by Acaulosporaceae, as regards the number of species and contribution of each one to the total number of spores. Three Glomeromycota families were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acaulosporaceae; Altitudinal gradient; Glomeromycota; Species diversity; Spore numbers; Steppe. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400521 |
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| MICHELETTI-FLORES,C.V.; NEGREIROS-FRANSOZO,M. L.. |
| The purpose of this study is to survey the porcellanid crab fauna inhabiting Phragmatopoma lapidosa sand reefs at Paranapuã Beach, São Vicente (SP), Brazil, and to assess species diversity, density and spatial distribution at this locality. Monthly samples were carried out from September/94 to August/95 in three established sampling sites along the rocky shore. Five species of Porcellanidae were recorded: Pachycheles laevidactylus, P. monilifer, Petrolisthes armatus, Pisidia brasiliensis and Megalobrachium roseum comprising 9,084 specimens. The former four species were recorded in all sampling sites while the latter ocurred only in one. The highest relative density was showed by P. laevidactylus followed by P. armatus. Remaining species were present in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porcelain crabs; Species diversity; Sabellariid reefs. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100009 |
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| Verma,Dev Kumar; Rathore,Gaurav. |
| Abstract Yellow pigmented, filamentous, Gram-negative bacteria belonging to genus Flavobacterium are commonly associated with infections in stressed fish. In this study, inter-species diversity of Flavobacterium was studied in apparently healthy freshwater farmed fishes. For this, ninety one yellow pigmented bacteria were isolated from skin and gill samples (n = 38) of three farmed fish species i.e. Labeo rohita, Catla catla and Cyprinus carpio. Among them, only twelve bacterial isolates (13.18%) were identified as Flavobacterium spp. on the basis of morphological, biochemical tests, partial 16S rDNA gene sequencing and phylogenetic analysis. On the basis of 16S rDNA gene sequencing, all the 12 isolates were 97.6-100% similar to six different formally... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flavobacterium; Fish; Species diversity; 16S rDNA; Phylogenetic analysis. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000400969 |
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| Bawa, Kamaljit; University of Massachusetts; kamal.bawa@umb.edu; Rose, Joseph; ; joesph.rose@umb.edu; Ganeshaiah, K.N.; ; kng@vsnl.com; Barve, Narayani; ; narayani@atree.org; Kiran, M.C.; ; kiran@atree.org; Umashaanker, R.; ; rus@vsnl.com. |
| We demonstrate for the first time the potential use of satellite imagery to characterize areas of high and low species richness of trees in tropical forests. Our studies, conducted in the Biligiri Rangaswamy hills in the Western Ghats, India, show a high positive correlation between species richness and the Normalized Difference Vegetation Index (NDVI), which is an index of green biomass. We discuss the application of NDVI values for biodiversity assessment and monitoring, as well as for conservation planning. The NDVI is a rough measure of green biomass. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Western Ghats; Species diversity; Tropical deforestation. |
| Ano: 2002 |
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| Registros recuperados: 115 | |
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