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1.
Aquatic fungi growing on dead fragments of submerged plants 总被引：1，自引：0，他引：1
The authors investigated the dead fragments of 22 species of submerged plants in the water from three limnological and trophical different water bodies (spring, river and pond). A total of 184 species of aquatic fungi, including 119 zoosporic and 65 conidial species were found on the fragments investigated plants. The most common fungus species were Aphanomyces laevis, Saprolegnia litoralis, Pythium rostratum (zoosporic fungi) and Acrodictys elaeidicola, Anguillospora longissima, Angulospora aquatica, Lemonniera aquatica, Mirandina corticola, Tetracladium marchalianum, Tetracladium maxiliformis, Trinacrium subtile (conidial fungi).
Most fungus species were observed on the specimens of Elodea canadensis (33 fungus species), Hippuris vulgaris f. submersa (33), Myriophyllum spicatum (34) and Potamogeton crispus (33), fewest on Ceratophyllum demersum (24), Fontinalis dalicarlica and Potamogeton nitens (each 25).
The most fungi were growing in the water from River Supraśl (107), the fewest in the water from Pond Dojlidy (99). Some aquatic fungus species were observed in the water of only one of the three water bodies – in Pond Dojlidy (30), in Spring Jaroszówka (32) and in the River Supraśl (39) species. Seventy-five species growing only on fragments of single submerged plants. A number of zoosporic and conidial species (22 and four, respectively) appeared new to Polish waters. Out of these 119 zoosporic species, some are known as parasites or necrotrophs of fish. 相似文献
2.
B. Czeczuga 《洁净——土壤、空气、水》1991,19(5):517-528
The work was undertaken to investigate the mycoflora of the river W?gorapa and its tributary, the river Goldapa-Jarka. Samples of water were collected in two years (1987-1988) for hydrochemical analysis and studies of the content. Thirty-seven species of fungi were found in these rivers. The following fungi, which had been unknown in Poland, were found in these rivers: Hapalopera fragilariae, Rhizophlyctis petersenii, Olpidiopsis vexans, Aphanomyces ovidestruens and Pythium inflatum. 相似文献
3.
B. Czeczuga 《洁净——土壤、空气、水》1991,19(1):57-65
The work was undertaken to investigate the mycoflora of the river Pisa and its tributary, the river Skroda. Samples of water were collected once a month over four years (1984 … 1987) for hydrochemical analysis and studies of the fungus content. Forty-three species of fungi were found in these rivers. The following fungi unknown in Poland were found in the Pisa river: Achlya megasperma and Rhipidium partenosporum. 相似文献
4.
Dr. B. Czeczuga 《Aquatic Sciences - Research Across Boundaries》1969,31(1):157-161
Summary The author studied the species and age of tree-trunks in the bed of the River Narew.
As a result of the investigations it was found that at a depth of 1.6–1.7 m fragments of alder (Alnus glutinosa Gaertn.) occur. The age of these wood pieces was established as 3800±70 years B. P. At a depth of 0.5 m however, the remains
of an oak trunk (Quercus robur L.) were found and their age was found to be 1470±50 years B. P. The author is of the opinion that the alder trunks are from
the subboreal period, whereas the oak remainders are from the neoboreal period.
Zusammenfassung Der Autor untersuchte die Arten und das Alter von Baumst?mmen, die sich im Bett des Narewflusses befinden. Bei diesen Untersuchungen wurden in einer Tiefe von 1,6–1,7 m Stücke von Erlenholz (Alnus glutinosa Gaertn.) gefunden, deren Alter mittels der14C-Methode mit 3800±70 Jahren festgestellt wurde. In einer Tiefe von 0,5 m hingegen wurden Reste eines Eichenstamms (Quercus robur L.) gefunden, welche ein Alter von 1470±50 Jahren aufweisen. Der Autor ist der Ansicht, dass das Erlenholz aus der subborealen, die Eichenholzreste aus der neoborealen Periode stammen.相似文献
5.
6.
Coprophilic fungi in the water from six different water bodies were studied between 1995–1997. For hydrochemical analysis samples of water were collected every three months while for estimation of fungus content every month. Excrements of 3 phytophagous (greylag goose, roman-nosed goose, mute swan), 4 carnivorous (grey heron, white stork, marsh harrier, cormorant) and 3 omnivorous bird species (musk-duck, mallard, black-headed gull) were used as bait.
Thirty-six fungus species growing on avian excrements in the water of all examined water bodies were found, 6 of these species belonged to Chytridiomycetes and 30 to Oomycetes. The largest number of fungus species was detected on excrements of musk duck, mallard and mute swan, the smallest one on excrements of roman-nosed goose, marsh harrier and cormorant. Such fungus species as Achlya americana, Aphanomyces laevis, Dictyuchus monosporus, Pythium debaryanum, Pythium rostratum, Saprolegnia asterophora, Saprolegnia ferax and Saprolegnia parasitica were detected on excrements of all birds examined. Out of these 36 species, 11 are known as parasites or necrotrophs of fish. Rhizophydium ampullaceum and Diasporangium jonesianum are reported for the first time from Poland. 相似文献
7.
The authors investigated the influence of the cyanobacterium Anabaena spiroides on the occurrence of aquatic Hyphomycetes in the water of five water bodies of different trophy. The presence of cyanobacteria in the water of all five waters reduced the number of fungi species from 29 to 10. Such species as Angulospora aquatica and Mirandina corticola were found both in control samples and with cyanobacterium from all five waters examined. 相似文献
8.
Conclusions En hiver 1965, on a fait un forage avec la sonde de Hiller à la profondeur de 0,60 m au milieu du lac Kolno qui est une réserve
du cygne muet (Cygnus olor Gm.).
On a analysé 92 épreuves du sédiment de fond au point de vue de sa structure, de sa teneur en eau, en chlorophylle non active,
en matière organique, en fer, en azote, en calcium et en silice; de plus, on a déterminé son age absolu (C14). Il en résultait la caractéristique de la structure verticale des sédiments de fond et quelques périodes caractéristiques
de la formation de ce lac.
La première période d’une puissance du sédiment de 50 cm (4,70–4,20 m) se caractérise par un sédiment sablonneux contenant
de petites quantités de chlorophylle non active, de matière organique et d’autres indicateurs montrant une extrêmement petite
production.
En commen?ant à une profondeur de 4,20 m, on observe de grands changements dans ce lac. La teneur en silice baisse de 90 jusqu’à
3%, la matière organique augmente de 2,1 à 7,6% jusqu’à plus de 50%, la teneur en calcium augmente également de quelques pour-cent
jusqu’à 60%, de même que celle du fer et de la chlorophylle non active. La détermination de l’age absolu du sédiment de la
couche entre 4,10 et 3,80 m, fait en 1965 au moyen de la méthode C14, a démontré que ces changements ont eu lieu il y a 6520±330 ans environ, ce qui correspond à la première moitié de la période
atlantique. Ces sédiments montaient jusqu’à une profondeur de 2,20 m.
Les sédiments de la période suivante d’une puissance de 80 cm (2,20–1,40 m) sont caractérisés par une plus grande teneur en
chlorophylle non active, en matière organique, en azote et en fer. Ces valeurs élevées sont probablement dues à une plus grande
production de la substance organique qui ne s’est pas décomposée totalement. Cette couche correspondrait à la période subboréale
sèche et chaude.
Les sédiments suivants (1,40–0,85 m) correspondent probablement à la période subatlantique dont le commencement se caractérisait
par un climat plus froid et plus humide, comme il ressort de la figure 2.
La période suivante commen?a par une rapide amélioration du climat (à une profondeur de 0,80 m), ce qui s’est manifesté par
une augmentation considérable de la chlorophylle non active, de l’azote et du fer. Selon la classification généralement adoptée,
ce sédiment correspondrait à la période néoboréale. Après cette période. le climat devenait de nouveau plus froid et plus
humide, comme, à l’exception de petites déviations, il l’est resté jusqu’à nos jours.
The research was subsidized by the Hydrobiological Committee and the Commission for the Protection of Nature and its Resources of the Polish Academy of Science. 相似文献
The research was subsidized by the Hydrobiological Committee and the Commission for the Protection of Nature and its Resources of the Polish Academy of Science. 相似文献
9.
B. Czeczuga 《Aquatic Sciences - Research Across Boundaries》1965,27(1):88-98
Summary The thickness of the bed sediment 5·70 m of the Mikolajki Lake (Central Mazur District) was measured at a depth of 18·5 m
by means of a vertical core sampler.
In the samples taken from this profile the amount of sedimentary chlorophyll in relation to the dry mass of the sediment,
the percentage of organic matter content and the absolute water content were determined.
From analyses of the amount of sedimentary chlorophyll and organic matter in the Mikolajki Lake sediment, two stages in the
development of the lake during the post-glacial period were distinguished which in their general outline corresponded to the
climatic changes described byBlytt andSernander. During the periods when the climate was cold and humid the proportion of sedimentary chlorophyll and organic matter was
smaller than during the periods of dry and warm climatic conditions when the lakes frequently became, for example during the
boreal period. In addition, the author suggests that two layers originating from the humid period and two layers from the
dry periods may be distinguished in the upper part of the profile. The former two would seem to correspond to the subatlantic
period, the two latter to the neoboreal period. 相似文献
10.
Zoosporic aquatic fungi growing on dead specimens of 29 freshwater crustacean species 总被引：1，自引：0，他引：1
The authors investigated aquatic fungi growing on the carapaces of 29 species of dead crustaceans (13 species of Copepoda, 13 species of Cladocera and 3 species of Ostracoda) in the water from six limnological and trophical different water bodies (two springs, one river, one lake and two ponds). All of these waterbodies are strongly loaded. 146 species of aquatic fungi were found on the carapaces: 40 Chytridiomycetes, 1 Hyphochytriomycete and 105 Oomycetes. The most common fungus species were Karlingia chitinophila, Myzocytium microsporum, Myzocytium zoophthorum, Pythium acanthicum, Pythium butleri and Pythium myriotylum. Most zoosporic fungus species were observed on the specimens of Daphnia pulex (50 fungus species), Daphnia magna (48) and Cyclocypris laevis (44), fewest on Cyclops fuscus and Cyclops vicinus (each 10).The most fungi were growing in the water from River Supraśl (86), the fewest in the water from Pond Fosa (53). Cluster analysis of the investigated parameters carried out in water bodies during the experiment on zoosporic fungus species has revealed that in the water from springs and Pond Fosa the number of fungus species is closely associated with the concentration of sulphates, in water from River Supraśl and Lake Komosa with calcium and in the water from Pond Dojlidy with chlorides. Out of these 146 species, 21 are known as parasites or necrotrophs of fish. Some dead specimens of crustacean species are a new substrate for some fungus species. 相似文献