Longitudinal distributional patterns of Peracarida (Crustacea, Malacostraca) in the River Danube
2015
Аутори:
Huber, ThomasLeitner, Patrick
Remund, Nadine
Graf, Wolfram
Paunović, Momir
Borza, Péter
Csányi, Béla
Szekeres, József
Тип документа:
Чланак у часопису (Објављена верзија)
,
© 2015 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany
Метаподаци
Приказ свих података о документуАпстракт:
The River Danube plays a central role in the spread of Ponto-Caspian
species as a part of the so-called southern invasion corridor
(Danube-Main-Rhine system); therefore, changes in its peracarid fauna
(comprising the bulk of invasives) merit special attention. The latest
international research expedition (Joint Danube Survey 3, 2013) offered
an opportunity for updating and synthesizing our knowledge about this
group along the Danube, previously based on studies covering only
certain river sections and/or dealing with a subset of species.
Altogether 17 amphipod, 7 mysid, 3 isopod, and one cumacean species were
recorded at 55 sites investigated between Ulm (river km 2581) and the
Delta. Recent large-distance expansion of additional Ponto-Caspian
species was not observed, but three species (Chelicorophium robustum, C.
sowinskyi, and Echinogammarus trichiatus) have been able to shorten
their distributional gap in the Middle Danube, E. trichiatus being
recorded for the first time in Serbia. Ponto-Caspian peracarids are
still gradually advancing in the German section, as well, implying
retreat of native Gammarus spp., and impeding the spread of
non-Ponto-Caspian invaders. On the contrary, some Ponto-Caspian species
seem to have declined in certain river sections; Dikerogammarus
bispinosus was entirely missing in the Lower Danube, and several species
characteristic of the lower reaches had been recorded previously much
farther upstream (most notably Chelicorophium maeoticum and
Obesogammarus crassus). The analysis of current and historical
distributional patterns revealed that the crucial step in the
large-scale spread of Ponto-Caspian species is crossing the section
between Baja and the Sava estuary (rkm similar to 1480-1170) -
characterized by an unfavorable combination of relatively strong
currents and fine bed material - by passive transport. Presence
immediately downstream of this section does not appear to promote
further expansion in most of the cases; the source region of
large-distance dispersal is most likely the Delta, implying that
potential future invaders cannot be identified based on their previous
expansion in the lower reaches of the river.
Кључне речи:
Amphipoda; Cumacea; Isopoda; Mysida; Ponto-Caspian; Range expansionИзвор:
Fundamental and Applied Limnology, 2015, 187, 2, 113-126
DOI: 10.1127/fal/2015/0769
ISSN: 1863-9135
WoS: 000367146800003
Scopus: 2-s2.0-84952666686
URI
https://radar.ibiss.bg.ac.rs/handle/123456789/2324http://www.ingentaconnect.com/content/schweiz/fal/2015/00000187/00000002/art00003#