Dynamics of microbial plankton communities: experiments in Kaneohe Bay, Hawaii

Landry,; Haas, LW; Fagerness, V.

doi:10.3354/meps016127

Cited by 268 publications

(203 citation statements)

References 17 publications

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“…The more narrow range in ciliate growth observed in our study compared to that in Narragansett Bay may be a function of our limited temporal resolution. Our estimates of microflagellate growth (primarily dinoflagellates, range, O-O.6 d-l; mean, 0.36 d--l) were similar to those determined from Santa Monica Bay, California (range, 0.16-0.50 d-l: Weiler andChisholm 1976), andKaneohe Bay, Hawaii (average, 0.24 d-l: Landry et al 1984), whereas the growth of Lake Michigan Pnano (O-O.34 d-l) was similar to populations in Narragansett Bay (range, O-0.33 d-l: Verity 1986a) and Kaneohe Bay (0.14 d-l: Landry et al 1984).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, growth rates for Hnano (range, 0.12-0.67 d-l; mean, 0.28 d-l) are at the low end of the range of those measured in Lake Biwa (Nagata 1988), Georgia coastal waters (Sherr and Sherr 1983;, and offshore Hawaiian waters (Landry et al 1984;Laws et al 1984).…”

Section: Discussionmentioning

confidence: 99%

“…Bloem et al 1986), several methods have been used to estimate their growth in undisturbed natural plankton communities: porous polycarbonate cages (Stoecker et al 1983;Landry et al 1984), dialysis bags (Verity 19863), and large carboys (Gilron and Lynn 1989). In each, the protozoa were incubated under in situ conditions.…”

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confidence: 99%

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Growth and production of planktonic protozoa in Lake Michigan: In situ versus in vitro comparisons and importance to food web dynamics

1992

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Growth of an entire planktonic protozoan community in Lake Michigan (nanoflagellates, microflagellatcs, and ciliates) was measured on 10 dates in 1988-l 989 in fractionated lake water (<3, ~8, < 30, and < 153 pm) incubated in bottles (in vitro), while in June and July 1989, in vitro growth rate estimates were compared with in situ growth rates derived from the mitotic index. Comparisons of in situ vs. in vitro growth rates for the taxa assayed were similar, indicating that in vitro experiments provide reasonable estimates of protozoan growth, and these rates were similar to those measured from other oligotrophic/mesotrophic habitats. However, containment artifacts in some bottle experiments influenced community growth as some taxa experienced mortality in bottles, thus underscoring the importance of ccnsusing the entire community. Protozoa in Lake Michigan contribute significantly to both heterotrophic and phototrophic carbon pools; phototrophic llagcllates represented 24% of primary production, while heterotrophic nanoflagellates and ciliates collectively constituted 40% of bacterial production. The fate of high bacterial production can be accounted for through grazing by both heterotrophic nanoflagellates and ciliates, indicating the trophic importance of protozoa in Lake Michigan.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Growth and production of planktonic protozoa in Lake Michigan: In situ versus in vitro comparisons and importance to food web dynamics

1992

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“…Starvation, for example, can reduce flagellate size (Tobiesen 1990;Monger & Landry 1991), and nutrient availability is recognised as affecting species composition (Landry et al 1984;Eccleston-Parry & Leadbeater 1994). Seasonal variation in nanoflagellate populations has also been widely studied, with large increases in abundance often reported during spring and autumn (Nagata 1988;Weisse et al 1990;Sanders et al 1992;Tamigneaux et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Factors influencing autotrophic and heterotrophic nanoflagellate abundance in five water masses surrounding New Zealand

Safi

Hall

1997

New Zealand Journal of Marine and Freshwater Research

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The aim of this study was to measure nanoflagellate abundance in New Zealand waters, and identify the key factors which both influence, and are influenced by, nanoflagellate abundance. Nanoflagellate populations were sampled in winter and spring 1993 from a series of sites representing different water masses around the South Island of New Zealand. Both numbers and biomass of heterotrophic (HNF) and autotrophic nanoflagellate (ANF) populations were larger in spring by a factor of four. ANF were about three times as abundant as HNF in both seasons. The physiochemical variables, temperature, NH 4 -N, and urea combined with bacteria and picophytoplankton numbers explained between 67 and 94% of the variation in nanoflagellate abundance. In addition, there was evidence that variation in abundances between seasons and water masses was influenced by food availability, predation, and changes in species composition represented by large differences in cell biovolume.

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“…Bactérias heterotróficas utilizam a matéria orgânica dissolvida como fonte de carbono e nutrientes para seu crescimento e são predadas por nanoflagelados heterótrofos 42,43,44,45 . Nanoflagelados também são importantes predadores de cianobactérias e algas do picofitoplâncton 45,46,47,48 . A atividade predatória dos na-noflagelados, por sua vez, tem efeito positivo no crescimento bacteriano e de picoautótrofos, pois leva à remineralização de nutrientes 48 .…”

Section: Efeitos Sobre áGua Sedimentos Microbiota Autóctone E Saúdeunclassified

Efeitos ambientais da disposição oceânica de esgotos por meio de emissários submarinos: uma revisão

Abessa¹,

Rachid²,

Moser³

et al. 2012

Mundo Saúde

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ResumoOs sistemas de disposição oceânica de esgotos domésticos, ou emissários submarinos, têm sido historicamente utilizados em todo o mundo como solução para destinação final de efluentes urbanos, principalmente devido aos aspectos econômi-cos. Porém, o descarte no oceano, seja em águas rasas ou mais profundas, pode induzir uma série de impactos ambientais negativos, dos quais se destacam a eutrofização, a floração de algas tóxicas, a introdução de microrganismos patogênicos e a contaminação por substâncias químicas capazes de produzir efeitos tóxicos sobre a biota e bioacumulação. Desse modo, o lançamento de esgoto não tratado no mar não constitui uma prática ambientalmente adequada, sendo necessário o tratamento dos efluentes de forma a remover nutrientes, contaminantes e organismos patogênicos e evitar a degradação ambiental. Palavras-chave:Esgotos. Emissário Submarino. Poluição. Saúde Pública. AbstractOceanic disposal systems of domestic sewage, or submarine sewage outfalls, have been historically used around the world as a solution for urban effluents, in special due to economic aspects. However, release into the ocean, in shallow or deep waters, may induce a set of negative environmental impacts, as eutrophication, toxic algal blooms, pathogenic microorganisms introduction and contamination by chemical substances which are capable of causing toxic effects to the biota and bioaccumulation. Thus, the release of untreated sewage into the sea does not constitute an adequate environmental practice; then, urban effluents should be treated in order to remove nutrients, contaminants and pathogenic organisms and avoid environmental degradation.

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Dynamics of microbial plankton communities: experiments in Kaneohe Bay, Hawaii

Cited by 268 publications

References 17 publications

Growth and production of planktonic protozoa in Lake Michigan: In situ versus in vitro comparisons and importance to food web dynamics

Growth and production of planktonic protozoa in Lake Michigan: In situ versus in vitro comparisons and importance to food web dynamics

Factors influencing autotrophic and heterotrophic nanoflagellate abundance in five water masses surrounding New Zealand

Efeitos ambientais da disposição oceânica de esgotos por meio de emissários submarinos: uma revisão

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