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Registros recuperados: 12
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Can insect data be used to infer areas of endemism?: An example from the Yungas of Argentina RChHN
NAVARRO,FERNANDO R; CUEZZO,FABIANA; GOLOBOFF,PABLO A; SZUMIK,CLAUDIA; LIZARRALDE DE GROSSO,MERCEDES; QUINTANA,M. GABRIELA.
The main purpose of this study is to analyze whether areas of endemism can be characterized quantitatively by using insects, which are typically much more poorly sampled than vertebrates or plants. For this, an optimality criterion in the search for endemic areas was used to analyze approximately 1,100 georeferences from 288 species of holometabolous insects found in the study region, the Yungas (a very moist, montane rainforest), located in north-western Argentina. The optimality criterion is implemented with the programs NDM/VNDM, used to evaluate areas of endemism (i.e. a set of cells defined by two or more endemic species). Five grid sizes were used, three square (Iº, 0.5°, and 0.25°) and two rectangular (0.25° x 0.5° and 0.5° x 0.25°). In agreement...
Tipo: Journal article Palavras-chave: Biogeography; Distribution patterns; Montane forests; NDM/VNDM.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000400006
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Diversity and distribution Patterns of the infralittoral green macroalgae from Potiguar basin, Rio Grande do Norte, Northeastern Brazil Acta Botanica
Cocentino,Adilma de Lourdes Montenegro; Fujii,Mutue Toyota; Reis,Thiago Nogueira de Vasconcelos; Guimarães-Barros,Nathalia Cristina; Rocha,Marcia de França; Neumann-Leitão,Sigrid.
Diversity and distribution pattern of the infralittoral green macroalgae at Potiguar basin, Rio Grande do Norte, Northeastern Brazil were analyzed from material collected at depths varying from 2 to 100 m. Collections were carried out with two types of dredges during four campaigns: July 2002, May and November 2003 and May 2004 at 43 stations. Chlorophyta is represented by 54 species, five varieties and three forms. The most representative family is Caulerpaceae, and the most diverse genus is Caulerpa, with 11 species. The results showed that most taxa (89%) are rare, and 10% are present at low frequencies. The most frequent species was Caulerpaprolifera (Forssk.) J.V. Lamour. occurring at almost all coastal and inner shelf stations, recorded in all...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Distribution patterns; Green macroalgae; Infralittoral; Tropical region; Brazil.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000400014
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High diversity and pan-oceanic distribution of deep-sea polychaetes: Prionospio and Aurospio (Annelida: Spionidae) in the Atlantic and Pacific Ocean ArchiMer
Guggolz, Theresa; Meißner, Karin; Schwentner, Martin; Dahlgren, Thomas G.; Wiklund, Helena; Bonifácio, Paulo; Brandt, Angelika.
Prionospio Malmgren 1867 and Aurospio Maciolek 1981 (Annelida: Spionidae) are polychaete genera commonly found in the deep sea. Both genera belong to the Prionospio complex, whose members are known to have limited distinguishing characters. Morphological identification of specimens from the deep sea is challenging, as fragmentation and other damages are common during sampling. These issues impede investigations into the distribution patterns of these genera in the deep sea. In this study, we employ two molecular markers (16S rRNA and 18S) to study the diversity and the distribution patterns of Prionospio and Aurospio from the tropical North Atlantic, the Puerto Rico Trench and the central Pacific. Based on different molecular analyses (Automated Barcode...
Tipo: Text Palavras-chave: Distribution patterns; Haplotype networks; Vema-Fracture-Zone; Clarion-Clipperton Fracture Zone; 16S rRNA; 18S.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00610/72216/71015.pdf
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Multi-scale distribution and dynamics of bivalve larvae in a deep atoll lagoon (Ahe, French Polynesia) ArchiMer
Thomas, Yoann; Garen, Pierre; Bennett, Auguste; Le Pennec, Marcel; Clavier, Jacques.
Bivalve larvae and hydrographic parameters were sampled over a range of spatio-temporal scales in a deep atoll lagoon. Bivalve larvae abundances were very high throughout the year: 18,550 m(-3) in average. Larvae were (i) concentrated at mid-depth with nocturnal ascent and diurnal descent, (ii) heterogeneously dispersed at the lagoon scale, (iii) subject to day-to-day variation in abundance and (iv) transferred between different parts of the lagoon providing evidence of intra-lagoonal connectivity. The primacy of physical factors was seen on large spatial scale with the diluting effect of water renewal and transfers by hydrodynamics. On smaller spatial scale, the primacy of biological processes was recognised, with larval swimming activity leading to dial...
Tipo: Text Palavras-chave: Bivalve larvae; Distribution patterns; Vertical migration; Pinctada margaritifera settlement; Deep atoll lagoon; French Polynesia.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00101/21200/20690.pdf
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Padrões de distribuição e especiação em Chrysobalanaceae e outras famílias de plantas amazônicas Acta Botanica
Prance,Ghillean T.
Neste trabalho são apresentados padrões de distribuição geográfica de espécies de Chrysobalanaceae, Caryocaraceae, Dichapetalaceae e Lecythidaceae. Seis padrões são discutidos: espécies amplamente distribuidas, polimórficas (ochlospecies) onde a variabilidade morfológica não conduzia a especiação; distribuição disjunta onde a diferenciação em espécie não ocorreu; especiação através de separação histórica tal como isolamento durante o Pleistoceno; generos com grupos de espécies muito relacionadas, que não podem ser subdivididos em subgeneros; utilizou-se diagramas de isolinhas de espécies para determinar o centro de diversidade dos gêneros; e, espécies de savanas que inicialmente tinham distribuição contínua e que atualmente são isoladas. A análise de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Distribution patterns; Speciation; Disjunct distribution; Refugia.
Ano: 1987 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300003
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Patterns and breaking points in the distribution of benthic algae along the temperate Pacific coast of South America RChHN
MENESES,ISABEL; SANTELICES,BERNABE.
According to biogeographic studies made two decades ago, marine benthic algal species of the Pacific temperate coast of South America could be grouped into five components according to their geographic affinities. Each of these components was distributed differentially along the coastline between 4º and 56ºS and thus, their contribution to the overall flora varied depending on the latitude. Species composition changed at specific latitudes in such a way that three groups could be observed: from 4 to 6ºS, from 6 to 30ºS and from 30 to 55ºS. Since 1980, new information on marine algae along this coastline allows a review of the previous phytogeographic characterization. The presence/absence of algal species, separated by division and geographic affinity, was...
Tipo: Journal article Palavras-chave: Distribution patterns; Breaking points; Species composition; Temperate Pacific.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400006
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Patterns of richness and distribution of Cactaceae in the Serra da Mantiqueira, Southeast Brazil, and implications for its conservation Acta Botanica
Gonzaga,Diego Rafael; Peixoto,Ariane Luna; Menini Neto,Luiz.
Abstract This study aimed to analyze patterns of richness and distribution of Cactaceae in the Serra da Mantiqueira (SM), a mountain range located in Southeast Brazil, and assess its conservation status. We compiled distribution data from the literature and 16 herbaria and plotted it on a map divided into grid squares of 0.5°. Richness, collection effort and similarity among grid squares were analyzed for the 33 taxa recorded in SM (five of which are endemic). Maciço do Itatiaia (in southern SM), Serra do Brigadeiro and Serra do Caparaó (in northern SM) are the richest areas. Collection effort and richness were correlated (R²=0.75). Similarity analysis revealed five clusters, one of which is composed of high elevation areas with a vegetation mosaic; the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Campo de altitude; Conservation; Distribution patterns; Species richness.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100097
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Revision of the Neotropical trahiras of the Hoplias lacerdae species-group (Ostariophysi: Characiformes: Erythrinidae) with descriptions of two new species Neotropical Ichthyology
Oyakawa,Osvaldo T.; Mattox,George M. T..
Hoplias lacerdae was originally described from the rio Ribeira de Iguape, Iporanga, São Paulo State. The Hoplias lacerdae group is defined as containing generally large trahiras with the medial margins of dentaries running parallel to each other and lacking teeth on the basihyal compared to the H. malabaricus group in which the medial margins of the dentaries converge towards the mandibular symphysis and which have teeth on the basihyal. A taxonomic revision of the group based on meristic and morphometric data identified five distinct species: H. lacerdae distributed in the rio Ribeira de Iguape and rio Uruguai; H. intermedius from the rio São Francisco, upper rio Paraná basin, and rio Doce; H. brasiliensis from rivers of the Atlantic Coastal drainage from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trairão; Freshwater fish; South America; Taxonomy; Distribution patterns.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200001
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Sandy beaches: state of the art of nematode ecology Anais da ABC (AABC)
MARIA,TATIANA F.; VANAVERBEKE,JAN; VANREUSEL,ANN; ESTEVES,ANDRÉ M..
ABSTRACT In this review, we summarize existing knowledge of the ecology of sandy-beach nematodes, in relation to spatial distribution, food webs, pollution and climate change. We attempt to discuss spatial scale patterns (macro-, meso- and microscale) according to their degree of importance in structuring sandy-beach nematode assemblages. This review will provide a substantial background on current knowledge of sandy-beach nematodes, and can be used as a starting point to delineate further investigations in this field. Over decades, sandy beaches have been the scene of studies focusing on community and population ecology, both related to morphodynamic models. The combination of physical factors (e.g. grain size, tidal exposure) and biological interactions...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Benthos; Distribution patterns; Food webs; Climatic changes.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501635
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Spatiotemporal ecology of two Neotropical herbivorous mammals Pap. Avulsos de Zool. (São Paulo)
Dias,Douglas de Matos; Almeida,Meyline de Oliveira Souza; Araújo-Piovezan,Talita Guimarães de; Dantas,José Oliveira.
Abstract On this study, we used camera traps in a Semi deciduous Seasonal Forest, northeast of Brazil, to estimate the frequencies of occurrence of two Neotropical herbivorous mammals: the spotted paca (Cuniculus paca) and the tapeti (Sylvilagus brasiliensis), analyzing their seasonal variations of spatial distribution. We also characterized the activity pattern of the species and their seasonal variation. The herbivorous frequencies of occurrence were constant during all the seasons. In general, both species were mostly active at night. However, between the rainy and dry season, we identified differences in spotted paca activity peaks. Here we present one of the first studies on the tapeti, whose ecology is understudied. Our results also show a general...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cuniculus paca; Sylvilagus brasiliensis; Agroforestry mosaic; Distribution patterns; Activity patterns.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100210
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The American genera of Simaroubaceae and their distribution Acta Botanica
Thomas,W. W.
A review of the phylogenetic relationships of the subfamilies of Simaroubaceae is presented and the distribution patterns of the American genera are discussed. Engler's six subfamilies are evaluated and the three subfamilies represented in the Americas and their included genera are discussed in detail. The eight American genera fall into three broad distributional categories: widely distributed throughout the neotropics, limited to northern South America, and disjunct between the West Indies, Central America and Mexico and southern South America. These distributions are discussed and interpreted.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Simaroubaceae; Distribution patterns; Neotropical flora.
Ano: 1990 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061990000100002
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What is the importance of open habitat in a predominantly closed forest area to the dung beetle (Coleoptera, Scarabaeinae) assemblage? Rev. Bras. entomol.
Costa,Fábio C.; Pessoa,Karen K. T.; Liberal,Carolina N.; Filgueiras,Bruno K. C.; Salomão,Renato P.; Iannuzzi,Luciana.
What is the importance of open habitat in a predominantly closed forest to the dung beetle assemblage? The Atlantic Forest in Brazil is one of the most highly disturbed ecosystems and is mainly represented by fragmented areas. However, in places where human disturbances have ceased, certain areas are showing a natural regeneration pattern. The aim of the present study was to determine how the dung beetle assemblage responds to distinct habitat structures in a fragment of Atlantic Forest. For such, open and closed forest areas were sampled in a fragment of the Atlantic Forest in the northeastern region of Brazil. Pitfall traps baited with excrement and carrion were used to collect the beetles. A total of 7,267 individuals belonging to 35 species were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CIMNC; Distribution patterns; Insecta; Spatial heterogeneity.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000300012
Registros recuperados: 12
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