(Ficoflórula perifítica do Baixo Rio Doce, Estado do Espírito Santo, Brasil, após passagem de rejeitos de minério, 1: Cosmarium Corda de parede lisa (Zygnematophyceae, Desmidiaceae.

Fadul-Souza, Bruna; Souza, Karoline Barros de; Trancoso, Mateus Sardi; Zorzal-Almeida, Stéfano; Bicudo, Carlos Eduardo de Mattos; Ramos, Geraldo José Peixoto; Fernandes, Valéria de Oliveira

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Special Article of Flora perifítica • Hoehnea 49 • 2022 • https://doi.org/10.1590/2236-8906-22-2022 copiar

(Ficoflórula perifítica do Baixo Rio Doce, Estado do Espírito Santo, Brasil, após passagem de rejeitos de minério, 1: Cosmarium Corda de parede lisa (Zygnematophyceae, Desmidiaceae.

Autoria SCIMAGO INSTITUTIONS RANKINGS

RESUMO

Este estudo teve como objetivo identificar e registrar as espécies de Cosmarium Corda de parede lisa ou finamente pontuada na região do baixo rio Doce, no Estado do Espírito Santo, Brasil. O material perifítico foi coletado mensalmente durante o período outubro de 2018 a fevereiro de 2020, exceto no mês de outubro de 2019. Identificamos 22 táxons e analisamos as condições ambientais (estado trófico, pH e ferro total) nas quais cada táxon ocorreu. O estudo registrou 21 novos registros de Cosmarium de parede lisa para o Estado do Espírito Santo e um (Cosmarium trilobulatum var. tumidum Willi Krieger & Gerloff) para o Brasil.

Palavras-chave:
desmídias; perifíton; taxonomia

Taxon	River			Lagoon		Lake			Frequency		Environmental condition
Taxon	Doce	Guandu	Areal	Areão	Monsarás	Limão	Nova	Juparanã	RF (%)	C	Trophic State	pH	Fe (mg L^-1)
Cosmarium abbreviatum Raciborski var. minus (West & G.S.West) Willi Krieger & Gerloff	x	x	x	x	x	x	x	x	21.4	LF	oli-hyp	ac-alk	0.2-3.7
Cosmarium angulosum Brébisson	---	---	---	---	x	---	---	---	0.4	R	oli	alk	2.7
Cosmarium baileyi Wolle	---	---	---	---	x	---	x	---	1.1	R	mes-hyp	neu-alk	0.2-0.7
Cosmarium clepsydra Nordstedt var. dissimile (Raciborski) Willi Krieger & Gerloff	---	---	---	---	---	x	---	---	0.4	R	oli-eu	alk	0.7
Cosmarium contractum Kirchner var. minutum (Delponte) Coesel	---	---	---	---	---	x	x	x	8.4	R	ult-eu	ac-alk	0.1-1.3
Cosmarium contractum Kirchner var. sparsipunctatum Kurt Förster ex Kurt Förster	---	---	---	---	---	x	x	---	0.8	R	ult-eu	neu	0.4-0.6
Cosmarium difficile Lütkemüller	---	---	x	---	x	x	---	---	4.6	R	oli-eu	neu-alk	0.2-3.0
Cosmarium galeritum Nordstedt var. subtumidum Borge	---	---	---	---	x	x	x	x	3.8	R	ult-eu	neu	0.1-2.7
Cosmarium granatum Brébisson ex Ralfs var. granatum	x	x	---	---	x	x	---	---	29.0	LF	ult-sup	ac-alk	0.2-7.1
Cosmarium impressulum Elfving	x	---	---	---	---	---	---	---	0.4	R	mes	alk	1.4
Cosmarium laeve Rabenhorst var. laeve	x	x	x	---	---	x	---	x	20.6	LF	ult-sup	neu-alk	0.2-4.3
Cosmarium lundellii Delponte var. madagascariense West & G.S. West	---	---	---	---	---	x	---	---	0.4	R	mes	alk	0.4
Cosmarium moniliforme (Turpin) Ralfs	---	---	---	---	x	---	---	---	0.8	R	oli-mes	alk	2.4-3.4
Cosmarium norimbergense Reinsch var. depressum (West & G.S.West) Willi Krieger & Gerloff	---	---	---	---	x	---	---	---	1.1	R	ult-oli	neu-alk	0.7-5.7
Cosmarium ocellatum Eichler & Gutwinski	---	---	---	---	---	x	---	---	1.5	R	mes	neu	0.9
Cosmarium pachydermum P.Lundell var. aethiopicum (West & G.S.West) West & G.S.West	x	---	---	---	---	x	x	---	0.4	R	ult-mes	alk	0.2-1.4
Cosmarium polygonum (Nägeli) W.Archer var. depressum Messikommer	---	---	---	x	---	---	---	---	1.5	R	mes	neu-alk	1.9-2.0
Cosmarium pseudoconnatum Nordstedt	x	---	---	---	x	x	x	x	10.3	LF	oli-sup	ac-alk	0.1-3.8
Cosmarium pseudopyramidatum P.Lundell	---	---	---	---	---	x	---	---	0.4	R	oli	alk	0.7
Cosmarium rectangulare Grunow var. hexagonum (Delponte) West & G.S.West	---	---	---	---	x	---	---	---	0.8	R	oli	alk	2.7-3.4
Cosmarium trilobulatum Reinsch var. abscissum (Schmidle) Willi Krieger & Gerloff	---	---	---	---	x	x	x	---	3.1	R	ult-sup	alk	0.2-2.7
Cosmarium trilobulatum Reinsch var. tumidum Willi Krieger & Gerloff	x	x	---	---	x	---	---	---	16.8	LF	oli-sup	neu-alk	0.8-3.7

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[1] ⁶Corresponding author: b.fadul.souza@gmail.com