Abstract:
:Fish assemblages along the longitudinal course of an old, disconnected and modified side arm of the Danube floodplain downstream of Vienna, Austria, as well as habitat structure, hydro-morphological and hydro-chemical factors, were investigated in order to analyse the key environmental determinants of the European mudminnow Umbra krameri. Generally, U. krameri was the most abundant species in the system. It occurred in disconnected ditches, ponds and pools with dense reed belts and comparatively low nutrient content, indicating its natural association with marsh habitats. At infrequently disturbed sites it was associated with a small group of stagnophilious and highly specialized species with adaptations to strong oxygen fluctuations. At frequently flooded sites, the species was absent or occurred in low abundances, indicating its adaptation to water bodies in older successional stages and its low competitive power in permanently connected floodplain habitats.
journal_name
J Fish Bioljournal_title
Journal of fish biologyauthors
Sehr M,Keckeis Hdoi
10.1111/jfb.13402subject
Has Abstractpub_date
2017-10-01 00:00:00pages
1072-1093issue
4eissn
0022-1112issn
1095-8649journal_volume
91pub_type
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