The Fresh-Water Algae of Southern United States I. Desmids from Mississippi, with Descriptions of New Species and Varieties

Prescott, G. W.; Scott, Arthur M.

doi:10.2307/3222675

Cited by 13 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Krieger (1939), mostrou-se indeciso ao inventariar as Micrasterias da Europa Central no que tange à posição sistemática de algumas variedades de M. pinnatifida, supondo que algumas dessas variedades nada mais seriam que formas teratológicas ou formas morfologicamente reduzidas da variedade típica da espécie. Prescott & Scott (1942), sugeriram que o grande polimorfismo de M. pinnatifida seria devido à grande sensibilidade desses organismos às mudanças das condições físicas e químicas do ambiente. Bicudo & Sormus (1982), sugeriram a necessidade urgente da realização de estudos populacionais para confirmar ou refutar a validade das variedades da espécie, com o que concordamos plenamente.…”

Section: Micrasterias Mahabuleshwarensisunclassified

Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) de duas Áreas de Proteção Ambiental da planície litorânea do norte da Bahia, Brasil

2009

View full text Add to dashboard Cite

-(Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) of two Environment Protection Areas of the northern littoral lowland of Bahia, Brazil). Taxonomical survey of genus Micrasterias C. Agardh ex Ralfs of two Environment Protection Areas (APA Rio Capivara and APA Lagoas de Guarajuba), both located in the Camaçari, Bahia State, northeastern Brazil. Ninety-six samples of planktonic and periphytic material studied was collected during the Summer (December 2006 to March 2007

show abstract

Section: Micrasterias Mahabuleshwarensisunclassified

Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) de duas Áreas de Proteção Ambiental da planície litorânea do norte da Bahia, Brasil

2009

View full text Add to dashboard Cite

show abstract

“…It differs from the nominate variety in having subtrapeziform semicells, retuse apices, and no granules at the isthmus region. Overall, this variety is quite rare, known only for its type-locality and Mississippi (USA) (Prescott & Scott 1942). The only distinct morphological feature of Brazilian specimens is the scrobicles thickening, which is not as prominent as those reported from the northern hemisphere.…”

Section: Cosmarium Guatemalensementioning

confidence: 85%

How hidden is the diversity of the genus Cosmarium (Desmidiaceae) in the Brazilian Caatinga?

2021

View full text Add to dashboard Cite

The Caatinga domain is the largest and most diverse tropical semiarid ecoregion of South America; however, little is known about the diversity of desmids it harbors, especially the genus Cosmarium (Desmidiaceae, Zygnematophyceae). Our study contributes to the knowledge of Cosmarium in the Caatinga through the report of 42 interesting taxa, including a new species (Cosmarium imperiale), 22 new records for South America, and 19 additions to the desmid flora from Brazil. The samples were gathered from periphytic material from the "Pantanal dos Marimbus" in the Chapada Diamantina region of Northeast Brazil. We provide taxonomic notes, ecological information, including habitat conditions with limnological data, and updated global distributions for all taxa of Cosmarium. A complementary quantitative study was performed during the last year of sampling ( 2018), which revealed that most taxa have their highest densities in the months with low precipitation and when the water's conductivity and transparency are greater. Our results also have implications for the conservation of the biota from Marimbus do Baiano and understand South America's desmids' biogeography since some rare taxa identified here were previously only known from other continents such as Europe and Africa.

show abstract

“…Thus, according to Nichols & Ackley (1932), Stokes (1893), Ralfs (1848), Wolle (1894), andPrescott (1935), desmids are most abundant in the vicinity of aquatic macrophytes. Prescott & Scott (1942), for example, state that the richest desmid floras are found in cloud-like masses of filamentous algae of many genera {Spirogyra, Mougeotia, Ocdogonium, and Zygnema) growing on Isoetes, Myriophyllum, and other associated aquatics.…”

Section: Introductionmentioning

confidence: 99%

The spatial distribution of desmids in lakes in northern Minnesota, U.S.A.

Bland

Brook

1974

Freshwater Biology

View full text Add to dashboard Cite

As a result of studies in certain lakes in northern Minnesota it has been found that the spatial distribution of desmids in them depends especially on the following factors: the constitution, abundance and distribution of the lakes' submerged aquatic flora and the morphometry and consequent patterns of their water circulation. The study has also shown a positive relationship between the size of desmid cells present in the plankton and the extent of water circulation. The latter factor may determine the composition and hence the diversity of lake phytoplankton.

show abstract

The Fresh-Water Algae of Southern United States I. Desmids from Mississippi, with Descriptions of New Species and Varieties

Cited by 13 publications

References 3 publications

Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) de duas Áreas de Proteção Ambiental da planície litorânea do norte da Bahia, Brasil

Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) de duas Áreas de Proteção Ambiental da planície litorânea do norte da Bahia, Brasil

How hidden is the diversity of the genus Cosmarium (Desmidiaceae) in the Brazilian Caatinga?

The spatial distribution of desmids in lakes in northern Minnesota, U.S.A.

Contact Info

Product

Resources

About