The epibenthic algal community of the Bonny estuary, Niger Delta, Nigeria

• Autorzy: Chindah A. C. , Hart A.I. , Braide S.A. , Amadi A.

Warianty tytułu

PL

Zbiorowiska glonow epibentosowych ujscia rzeki Bonny, Delta Nigru, Nigeria

• Języki publikacji: EN

Abstrakty

EN

A total of 193 species were encountered, diatoms representing 61.2% of the taxa present. Others were Cyanophyta (30.1%), Chlorophyceae (4.1%), Euglenophyta (2.6%), and Dinophyceae (1.5%). The density and chlorophyll ɑ values for the high intertidal zone showed higher and wider variation than those for the mid and low intertidal zones. Nutrients were found to correlate significantly with epibenthic algal density but did not correlate with chlorophyll ɑ.

PL

Wyniki badania chemizmu osadów (tabela I) wykazały, że strefa wysokich pływów miała wyższe zawartości nutrientów niż strefy niskich i średnich pływów. Na obszarze pływów ujścia rzeki Bonny stwierdzono 193 gatunki glonów (tabela II, ryc. 1). W tabeli III przedstawiono najliczniejsze dla każdej strefy ekologicznej gatunki. Dominowały okrzemki, stanowiące 61.2% zbiorowiska glonów, a następnie Cyanophyta (30.1%). Pozostałe taksony to: Chlorophyceae (4.1%), Euglenophyta (2.6%) i Dinophyceae (1.5%). Taki obraz dominacji utrzymywał się w każdej strefie ekologicznej, chociaż zagęszczenia glonów epibentosowych były najwyższe w strefie wysokich pływów w miesiącach styczeń-maj (tabela IV). Fosfor i azot korelowały pozytywnie z zagęszczeniami glonów epibentosowych, natomiast chlorofil ɑ nie wykazywał korelacji ani z zagęszczeniami glonów ani z badanymi parametrami chemicznymi (tabela V).

Słowa kluczowe

PL

rzeki; sklad chemiczny; hydrologia; Cyanophyta; osady denne; Nigeria; hydrobiologia; taksony; glony; Delta Nigru; okrzemki; Euglenophyta; Chlorophyceae; Dinophyceae

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1993
• Tom: 35
• Numer: 4
• Opis fizyczny: s.307-320,tab.,map.,bibliogr.

Twórcy

autor

Chindah A. C.

• Rivers State University of Science and Technology, Institute of Pollution Studies, PMB 5080, Port Harcourt, Rivers State, Nigeria

autor

Hart A.I.

autor

Braide S.A.

autor

Amadi A.

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