Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Taxonomic composition and biomass of heterotrophic flagellates in relationto lake trophy and season
Autore:
Auer, B; Arndt, H;
Indirizzi:
Univ Cologne, Inst Zool, Dept Gen Ecol & Limnol, D-50923 Cologne, Germany Univ Cologne Cologne Germany D-50923 & Limnol, D-50923 Cologne, Germany
Titolo Testata:
FRESHWATER BIOLOGY
fascicolo: 7, volume: 46, anno: 2001,
pagine: 959 - 972
SICI:
0046-5070(200107)46:7<959:TCABOH>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROBIAL FOOD-WEB; FRESH-WATER; PROTOZOAN CONTROL; MESOTROPHIC LAKE; EUTROPHIC LAKE; ANNUAL CYCLE; BOTTOM-UP; TOP-DOWN; BACTERIA; ZOOPLANKTON;
Keywords:
autecology; community structure; lake trophy; protists; season;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Auer, B Univ Cologne, Inst Zool, Dept Gen Ecol & Limnol, Weyertal 119, D-50923 Cologne, Germany Univ Cologne Weyertal 119 Cologne Germany D-50923 ologne, Germany
Citazione:
B. Auer e H. Arndt, "Taxonomic composition and biomass of heterotrophic flagellates in relationto lake trophy and season", FRESHW BIOL, 46(7), 2001, pp. 959-972

Abstract

1. Taxonomic composition and abundance of heterotrophic flagellates (HF) were studied in 55 lakes with different trophy in northern Germany using a live-counting technique.2. Mean abundances and biomasses of HF ranged from 169 cells L-1 and 22 mug L-1 in mesotrophic lakes to 2439 cells mL(-1) and 475 mug L-1 in hypertrophic lakes, respectively. Highest values were generally observed in spring,but mesotrophic lakes showed maximum values in early summer.3. The taxonomic composition of HF was not significantly influenced by lake trophy and season. The major fraction of HF consisted of chrysomonads andProtista. incertae sedis; other important groups were choanoflagellates and bicosoecids. The size distribution of HF changed with lake trophy and season, with a higher proportion of large HF (> 10 mum) in hypertrophic lakes and in spring, respectively.4. Correlation analyses revealed a strong negative impact of cladocerans on total HF biomass and especially on large HF. Ciliates and large bacteria (> 10 Lm) were strongly positively correlated with HF biomass; small bacteria (< 2 <mu>m) showed a weak positive correlation.5. Analyses at the level of species and genera revealed distinct distribution patterns of some taxa. Paraphysomonas, Aulacomonas and Quadricilia as large-bodied HF showed highest abundance in hypertrophic lakes and in spring. Attached taxa (e.g. Monosiga, Salpingoeca amphoridium) were highly abundant in late summer and autumn, whereas Spumella and Kathablepharis occurred frequently in most samples.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/06/20 alle ore 22:05:50