Characterizing the long-term taxonomic and functional variability of a stream fish assemblage
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Tartalom: http://real.mtak.hu/9116/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published



Type = Article
Cím:
Characterizing the long-term taxonomic and functional variability of a stream fish assemblage
Létrehozó:
Czegledi, I.
Erős, Tibor
Kiadó:
Schweizerbart und Borntraeger
Dátum:
2013
Téma:
Q1 Science (General) / természettudomány általában
QE08 Hydrosphere. Hydrology / hidroszféra, hidrológia
QH540 Ecology / ökológia
SH Aquaculture. Fisheries. Angling / vizi növény-és állattartás, halászat, sporthorgászat
Tartalmi leírás:
While much research has been devoted to characterizing congruency in the spatial distribution of taxonomic
and functional structure, the temporal aspect of this relationship is poorly known. We examined taxonomic
and trophic function based variability of a stream fish assemblage using a 12-year data set of spring and summer
surveys. We found the occurrence of the most abundant species was persistent, while their relative abundance was
variable. Rare, satellite species formed less than 3 % of the assemblage and contributed little to variations in relative
abundance. Assemblage level trophic function proved to be relatively stable across years, but showed clear
seasonality. The pattern of long-term taxonomic composition indicated that seasonal differences in trophic function
were primarily due to a switch to alternate food resources by some species between seasons and not due to periodic
immigration/emigration of fish with different functions. Overall, our study showed significant directional changes
in taxonomic variability in time, but relative stability in trophic function, and suggested that local processes (i.e.
population dynamics of resident species and seasonality of food resources) influenced assemblage dynamics, while
the relative role of regional scale processes (periodic immigration/emigration) was low. The study also suggests
considering more direct measures for evaluating the assemblage level function of fish than using rigid guild-based
categorizations.
Nyelv:
angol
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Czegledi, I. and Erős, Tibor (2013) Characterizing the long-term taxonomic and functional variability of a stream fish assemblage. FUNDAMENTAL AND APPLIED LIMNOLOGY, 183 (2). pp. 153-162. ISSN 1863-9135
Kapcsolat:
MTMT:2472503; doi:10.1127/1863-9135/2013/0495
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