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Spatio-temporal decay 'hot spots' of stranded wrack in a Baltic sandy coastal system. Part I. Comparative study of the pattern: 1 type of wrack vs 3 beach sites

100%

Jedrzejczak M. F.

Oceanologia

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2002

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tom 44

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nr 4

The significance of distance along the beach-dune transect and different moisture conditions as regards the decay of Zostera marina leaf litter was investigated in simple field experiments in three temperate, medium- to fine-quartz-sediment, sandy beaches of the Gulf of Gdańsk in Poland. 1800 replicate litterbags of freshly stranded Zostera marina leaves were placed in beach sediments at different strata and levels on each of the beaches. The litterbags were sampled after 5, 10, 50, 100 and 150 days in the field and the remaining material was then dried and weighed. Under similar conditions of sediment composition, salinity and wave inundation, ANOVA tests revealed significant differences in breakdown through time and site. Thus there were some differences in the decay process between the low and high beach. In the former, degradation proceeded rapidly in the initial stages and then stabilised, while in the latter it remained linear throughout the study period.Matter loss in each stratum was also seasonally dependent. This may, however, be more closely linked to successional changes in the chemistry and/or microflora of the beach wrack than to its physical breakdown. Differences between organic matter degradation in the high and low beaches may be explained by differences in the moisture regime and nutrient status, and not by differences in the decay processes themselves. Therefore, two decay centres were found in the beach-dune system: the low beach together with the strandline (wrack consumption 12–21 % day−1 in the warm season, and 4–10 % day−1 in the cold season) and the dune (active consumption 2–6 % day−1 in the warm season only).

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The effect of environmental factors on filtration and the oxygen consumption rate of the rotifer Brachionus plicatilis: a primary exploration of red tide control

80%

Kang K. H., Seon S. C., Brzozowska R., Lee J. Y.

Oceanological and Hydrobiological Studies

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2010

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tom 39

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nr 1

3-9

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Caligus tenuifurcatus Wilson, 1937 [Copepoda, Siphonostomatoida], a parasite of centropomid and lutjanid teleosts from a coastal system of the Mexican Pacific

80%

Suarez-Morales E., Ho J., Santana-Pineros A. M.

Acta Parasitologica

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2008

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tom 53

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nr 4

Specimens of the parasitic siphonostomatoid copepod Caligus tenuifurcatus Wilson, 1937 were collected from the oral cavity of the yellowfin snook, Centropomus robalito Jordan et Gilbert; the white snook, C. viridis Lockington (Perciformes, Centropomidae), and the yellow snapper, Lutjanus argentiventris (Peters) (Perciformes, Lutjanidae), from a Pacific coastal system of Mexico. Infection was most intense on C. viridis. Caligus tenuifurcatus can be distinguished from its closest congener, C. bonito Wilson, by the body proportions and the basal ornamentation of the medial setae of the second exopodal segment of leg 1. Taxonomic illustrations are provided of both female and male. This is the third record of C. tenuifurcatus; hitherto, it was known only as a parasite of the roosterfish Nematistius pectoralis Gill (Perciformes, Nematistiidae) from Panama and the Gulf of California. Hence, the finding of C. tenuifurcatus as a parasite of two species of centropomids and one species of lutjanid represents a significant expansion of the known host range of this copepod in the eastern tropical Pacific.

Ograniczanie wyników

1 Acta Parasitologica

1 Oceanologia

1 Oceanological and Hydrobiological Studies

1 Brzozowska R.

1 Ho J.

1 Jedrzejczak M. F.

1 Kang K. H.

1 Lee J. Y.

1 Santana-Pineros A. M.

1 Seon S. C.

1 Suarez-Morales E.

1 2010

1 2008

1 2002

Spatio-temporal decay 'hot spots' of stranded wrack in a Baltic sandy coastal system. Part I. Comparative study of the pattern: 1 type of wrack vs 3 beach sites

The effect of environmental factors on filtration and the oxygen consumption rate of the rotifer Brachionus plicatilis: a primary exploration of red tide control

Caligus tenuifurcatus Wilson, 1937 [Copepoda, Siphonostomatoida], a parasite of centropomid and lutjanid teleosts from a coastal system of the Mexican Pacific