Macroalgas de riachos da Floresta Nacional de Irati, região centro-sul do Estado do Paraná, Sul do Brasil

Branco, Ciro César Zanini; Emed, Rafael Guilherme; Branco, Luis Henrique Zanini; Júnior, Orlando Necchi

doi:10.1590/s0102-33062008000200013

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…The total number of taxa found in the present study (38) can be considered high when compared to studies carried out in other Brazilian regions that used similar methodology, namely: i) 13 taxa (Pereira & Branco 2010) and 21 taxa (Almeida et al 2011) in the northwest of the São Paulo State; ii) 23 taxa (Branco et al 2008) and 34 taxa , in the central-southern region of the Paraná State; iii) 24 taxa (Branco et al 2009) in the mid-western region of the Paraná State, and; iv) 19 taxa (Peres et al 2008) reported to the eastern region of Paraná State. Likewise, when considering the relative richness, found 1.81 taxa per sampling point, which is also higher when compared to what was reported in those other regions (taxa per sampling point and respective studies: 1.09 in Branco et al 2009, 1.23 in Almeida et al 2011, 1.35 in Peres et al 2008, 1.78 in Krupek et al 2008, 2.09 in Branco et al 2008.…”

Section: Discussionmentioning

confidence: 41%

Stream macroalgal flora from Parnaíba River Basin, Brazil: reducing Wallacean shortfall

2019

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The global biodiversity loss is a consensus. The biodiversity conservations shortfalls make conservation of biological diversity even more challenging. For many taxa, the knowledge about their distributions is deficient, and this is called the Wallacean shortfall. This situation is no different within algae biodiversity, especially in Brazil. There is still an enormous inequity of sample effort, as is the case of the Parnaíba River Basin (Northeast region), which had only 10 algal species in published (the lowest number of algal species reported among the main Brazilian basins). The present work had the objective of increasing the knowledge of algal flora in Brazil by conducting a taxonomic study of the stream macroalgal species of the Parnaíba River Basin. The sampling of macroalgae was carried out in 21 segments of streams from the Middle and Lower Parnaíba Basin, in the Piauí and Maranhão states. Macroalgae were manually removed and preserved in 4% formaldehyde. Environmental characteristics of each segment were measured in order to describe the sampling sites. The taxonomic survey of the macroalgal communities resulted in the identification of 38 taxa in total, of which 32 at a specific level; three vegetative groups; two sporophytic stages of red algae and one unidentified species. Among the 38 species recorded, 37 are new records for the Parnaíba River Basin. Following the same pattern, 23 species are new records for the Brazilian Northeast region, and Microcoleus lacustris represented the first report in Brazil. Despite the fact that it remains the Brazilian basin with the lowest number of algal species documented, this study contributed to the increase of almost five times the number of species sampled in the Parnaíba River Basin (from only 10 to 47 species). These data reinforce that the differences presented in algal diversity in the Brazilian regions are more related to the sampling effort than other factors (e.g. environmental characteristics, geographic distribution, biomes, among others). In addition, this survey illustrates not only the group's lack of information in the region but also shows the importance of this type of study as a tool for expanding the knowledge about biodiversity and its conservation.

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Section: Discussionmentioning

confidence: 41%

Stream macroalgal flora from Parnaíba River Basin, Brazil: reducing Wallacean shortfall

2019

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“…pulvinata em riachos da porção oriental da Mata Atlântica do estado de São Paulo. A partir deste, vários trabalhos têm registrado a espécie em riachos do Sul e Sudeste do Brasil, particularmente para os estados de São Paulo e Paraná (NECCHI et al, 2000;KRUPEK et al, 2007;PERES et al, 2008;BRANCO et al, 2008;2009a;2009b).…”

Section: Comentários Taxonômicosunclassified

“…Paraná (KRUPEK et al, 2007;PERES et al, 2008;2009;BRANCO et al, 2008;2009a;2009b), São Paulo (BRANCO; NECCHI, 1996;NECCHI et al, 2000), Rio Grande do Sul (BOHLIN, 1897).…”

Section: Distribuição No Brasilmentioning

confidence: 99%

Algas verdes coloniais em riachos de Unidades de Conservação do Sul do Brasil: taxonomia e aspectos ecológicos / Colonial green algae from streams of Conservation Units in Southern Brazil: taxonomy and ecological aspects

et al. 2013

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ResumoEspécies de algas verdes coloniais de 10 Unidades de Conservação da região Sul do Brasil foram investigadas. As amostragens foram conduzidas em 105 segmentos de riachos consistindo em transeções de 10 metros de comprimento. Além dos dados biológicos, foram mensuradas algumas variáveis ambientais: profundidade, velocidade da correnteza, temperatura da água, turbidez, condutividade específica, pH, oxigênio dissolvido e nutrientes (nitrogênio total e ortofosfato). Foram registradas três espécies de algas verdes coloniais [Ecballocystis pulvinata Bohlin var. pulvinata, Tetraspora gelatinosa (Vaucher) Desvaux e Tetraspora lubrica (Roth) C. Agardh] as quais foram descritas e ilustradas. Baseando-se nos dados ambientais, foram observados alguns padrões de distribuição ecológica destas espécies, entre os quais a ocorrência de E. pulvinata var. pulvinata em ambientes com temperatura da água e velocidade da correnteza mais elevadas, enquanto as espécies de Tetraspora ocorreram tipicamente em ambientes com valores mais baixos de nitrogênio total, ortofosfato e condutividade específica. Palavras-chave:Ecballocystis; Tetraspora; ecossistemas lóticos; macroalgas. AbstractSpecies of colonial green algae from 10 Conservation Units from the Southern Brazil were surveyed. The samplings were carried out in 105 stream reaches,

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“…Salomoni et al 2011;França et al 2017) or macroalgal communities (e.g. Branco et al 2001;2008a;Necchi Jr. et al 2008;Tonetto et al 2015;, and the majority of them are concentrated in the southeastern/southern regions. Microscopic attached algae from other taxonomical groups are less known, which may lead to underestimated numbers for general phycological diversity in such environments.…”

Section: Introductionmentioning

confidence: 99%

Soft-bodied benthic algae in pristine Brazilian streams: from acid to karst

2019

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This study evaluated soft-bodied benthic algae from seven streams located in protected areas of central Brazil (Parque Nacional de Brasília, Parque Nacional da Chapada dos Veadeiros and Parque Estadual de Terra Ronca), and related them to abiotic factors. We addressed the following questions: A) how algal community structure in Cerrado streams is influenced by the marked seasonality typical of the region; and B) how karst geology influences algal communities in Parque Estadual de Terra Ronca, as compared to streams in other Cerrado areas. Samples were collected between 2012 and 2013 from a single site in each stream, and upstream and downstream of caves present in Parque Estadual de Terra Ronca. Altogether, 159 taxa were recorded. Algal community structure varied significantly among sites, but not between seasons, despite relatively lower abundances during the rainy season, likely due to a negative influence of the faster currents in streams during this period. Some alkaliphilic species were observed only at sites near caves (e.g. the cyanobacterium Tolypothrix distorta), while acidophilic taxa were more frequent in the other streams (e.g. desmids and Cyanobacteria such as Scytonema caldarium, Hapalosiphon stuhlmannii and Stigonema ocellatum). We observed a rare green alga, Microthamnion kuetzingianum, and reported the cyanobacterium Rivularia aquatica for the first time in Brazil.

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Macroalgas de riachos da Floresta Nacional de Irati, região centro-sul do Estado do Paraná, Sul do Brasil

Cited by 5 publications

References 23 publications

Stream macroalgal flora from Parnaíba River Basin, Brazil: reducing Wallacean shortfall

Stream macroalgal flora from Parnaíba River Basin, Brazil: reducing Wallacean shortfall

Algas verdes coloniais em riachos de Unidades de Conservação do Sul do Brasil: taxonomia e aspectos ecológicos / Colonial green algae from streams of Conservation Units in Southern Brazil: taxonomy and ecological aspects

Soft-bodied benthic algae in pristine Brazilian streams: from acid to karst

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