Regeneration of the molluscan fauna of a small lowland river after dredging

Zawal, Andrzej; Sulikowska-Drozd, Anna; Stępień, Edyta; Jankowiak, Łukasz; Szlauer-Łukaszewska, Agnieszka

doi:10.1127/fal/2016/0753

Cited by 20 publications

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“…According to incomplete literature data, restoration of the prior invertebrate biomass takes place within 13 months, while species density and richness are usually restored within a week or two, less often requiring a few months or a year. Relatively rapid restoration of benthonic macrofauna following dredging has also been noted by van Dolah et al (1984), McCabe et al (1998), Szlauer-Łukaszewska and Zawal (2014) and Zawal et al (2015Zawal et al ( , 2016aZawal et al ( , 2016b. The efficiency of recolonization processes depends on a number of ecological factors (intensity and duration of the disturbance, including changes in the integrity of the system and its productivity, the time of year it takes place, the distance and location of centers of recolonization, or the presence of refuges), and on the biology and phenology of particular groups of invertebrates (life cycles, duration of a generation, frequency and length of periods of appearance, or dispersal capacities), while recolonization processes can be completed within a week to over a year after the cause of the disturbance ceases (Niemi et al, 1990;Yount and Niemi 1990;Wilber and Clark, 2007).…”

Section: Discussionmentioning

confidence: 74%

“…These transformations have a significant effect on the biodiversity of river fauna and flora (Allan, 1995;Cavailléa et al, 2013;Szlauer-Łukaszewska and Zawal, 2014;Stępień et al, 2015aStępień et al, , 2015bZawal et al, 2015Zawal et al, , 2016aZawal et al, , 2016b. Typical regulation procedures include dredging of sediment and the removal of littoral vegetation and obstructions in the form of trees and branches in order to increase water flow within the river channel.…”

Section: Introductionmentioning

confidence: 99%

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The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

et al. 2016

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Using the example of a regulated stretch of the River Krąpiel (NW Poland), an analysis of the impact of dredging on the aquatic beetle (Coleoptera) fauna was made. After dredging the beetle fauna became markedly poorer quantitatively and had lower species diversity. Moreover, the qualitative composition and dominance structure were highly transformed. However, species number and diversity increased rapidly and were restored within just half a year. The structure of the restored fauna was most strongly influenced by vegetation, flow velocity and bottom sediment composition. The first to colonize the river were eurytopic beetles and species typical of small water bodies, which had significant refuges in the form of fish ponds bordering on the river; these species dominated the assemblage throughout the study period. Rheophiles with less dispersal power appeared later, and finally rheobionts, in low numbers but occupying an increasing number of sampling sites.

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Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

et al. 2016

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“…Not any less important are human activities performed on the river itself, a clear example of which can be seen in the studied River Krąpiel (SzlauerŁukaszewska and Zawal, 2014;Bańkowska et al, 2015;Dąbkowski et al, 2016;Stępień et al, 2015;Zawal et al, 2015;2016d;Płaska et al, 2016). A proper assessment of those influences, as opposed to internal site factors, is, however, still lacking and requires further research.…”

Section: Introductionmentioning

confidence: 99%

“…That is why scientists have been showing a growing interest in relations between river-dwelling fauna and the fauna of other water bodies within the floodplains of rivers (Castella et al, 1984;Stanford et al, 1996;Van den Brink et al, 1996;Stanley et al, 1997;Ward et al, 1999;Robinson et al, 2002;Biesiadka and Pakulnicka, 2004a). Papers describing the faunistic and ecological features of hydrobiont groups are now available, and point to these being shaped by the system's lasting hydrological interconnection (Kajak, 1959;Castella et al, 1984Castella et al, , 1991Castella and Amoros, 1988;Ward et al, 2002;Biesiadka and Kurząt-kowska, 2003;Biesiadka et al, 2004;Biesiadka et al, 2004;Czachorowski, 2004;Jurkiewicz-Karnkowska, 2006;Reckendorfer et al, 2006;Obolewski et al, 2009;Stryjecki and Kowalczyk-Pecka, 2013;Zawal and Kowalik, 2013;Kowalik et al, 2014;Zawal et al, 2016d).…”

Section: Introductionmentioning

confidence: 99%

Development of fauna of water beetles (Coleoptera) in waters bodies of a river valley – habitat factors, landscape and geomorphology

Pakulnicka

Buczyński

Dabkowski

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

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-The goal of the study was to identify the beetle fauna of a small lowland river valley against its spatial arrangement and the directions of beetle migrations between habitats, as well as to determine which environmental factors affect the characteristics of water beetle populations in a river valley's lentic water bodies. The field studies were carried out in various types of water bodies. 112 species of beetles with various ecological characteristics were identified. It was demonstrated that the diversity of water bodies in the valley is conducive to high local species richness. At the same time, the observed high degree of faunistic individualism may be regarded as a sign of poor symmetry in the directions of fauna propagation, particularly that of stagnobionts. The authors argue that high individualism is the consequence of poor hydrological contact between the water bodies due to topography and rare instances of high tide in the river, which, in turn, is the reason for active overflights remaining the main mean of migration between those water bodies. The factors restricting migration of fauna between the water bodies include certain landscape characteristics of the catchment which form topographical obstacles, mainly numerous and dense forest areas. The character of fauna in the respective types of water bodies is affected also by internal environmental factors, particularly the degree to which they are overgrown with macrophytes, type of bottom, type of mineral and organic matter as well as physical parameters of water, such as saturation, pH, temperature and biological oxygen demand.Keywords: water beetles / river valley / migrations / hydrological system / ecological groups / landscape characteristics / environmental factors Résumé -Développement de la faune de coléoptères aquatiques (Coleoptera) dans les eaux d'une vallée -facteurs de l'habitat, paysage et géomorphologie. Le but de l'étude était d'identifier la faune de coléoptères d'une petite vallée d'une rivière de plaine en fonction de son paysage et des directions des migrations des coléoptères entre les habitats, ainsi que pour déterminer quels facteurs environnementaux influent sur les caractéristiques des populations de coléoptères aquatiques dans les plans d'eau d'une vallée. Les études sur le terrain ont été effectuées dans divers types de masses d'eau. 112 espèces de coléoptères avec diverses caractéristiques écologiques ont été identifiées. Il a été démontré que la diversité des masses d'eau dans la vallée est propice à la haute richesse des espèces locales. Dans le même temps, le degré élevé observé de l'hétérogénéité faunistique peut être considéré comme un signe de mauvaise symétrie dans les directions de propagation de la faune, en particulier celle des stagnobiontes. Les auteurs soutiennent que la forte hétérogénéité est la conséquence d'un mauvais contact hydrologique entre les masses d'eau en raison de la topographie et de rares inondations de la rivière, ce qui, à son tour, est la raison pour laquelle les survols

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“…In opposition to this, 315 there are the springs from the locality of Z1, where there was only a small water bodies element, 316 resulting from the dominant influence of flood waters. Crenobiontic fauna have a much less 317 significant dispersal ability than rheobiontic fauna and therefore the damaged fauna is reborn 318 much more slowly even the same environmental conditions (Szlauer-Łukaszewska & Zawal, 319 2014;Stępień et al, 2015;Zawal et al, 2015Zawal et al, , 2016aZawal et al, , 2016bZawal et al, , 2016cZawal et al, , 2017; Dąbkowski et al, 320 2016; Płaska et al, 2016; Buczyński et al, 2016; Pakulnicka et al, 2016a, 2016b; Buczyńska et 321 al., 2017; Gerecke,Martin & Gledhill, 2017). We did not find any rhitrobiontic species in 322 flooded springs: these were dominated by lenitobionts and to a lesser extent by crenobionts.…”

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Supplemental Information 2: Appendix 2

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This paper examines the impact of disturbance factors -flooding and desiccation -on the distribution of water mites in the riparian springs situated in the valley of a small lowland river, the Krąpiel. The landscape factors and physicochemical parameters of the water were analysed in order to gain an understanding of the pattern of water mite assemblages in the riparian springs. Three limnological types of springs were examined (helocrenes, limnocrenes and rheocrenes) along the whole course of the river and a total of 35 water mite species were found. Our study shows that flooding influences spring assemblages, causing a decrease in crenobiontic water mites in flooded springs. The impact of intermittency resulted in a high percentage of species typical of temporary water bodies.Surprisingly, the study revealed the positive impact of the anthropogenic transformation of the river valley: preventing the riparian springs from flooding enhances the diversity of crenobiontic species in non-flooded springs. In the conclusion our study revealed that further conservation strategies for the protection of the riparian springs along large rivers would take into account ongoing climatic changes and the positive impact of the anthropogenic transformation of river valleys.PeerJ Preprints | https://doi.org/10.7287/peerj.preprints.26895v1 | CC BY 4.0 Open Access | recABSTRACT 24 This paper examines the impact of disturbance factors -flooding and desiccation -on the 25 distribution of water mites in the riparian springs situated in the valley of a small lowland river, 26 the Krąpiel. The landscape factors and physicochemical parameters of the water were analysed in 27 order to gain an understanding of the pattern of water mite assemblages in the riparian springs.28 Three limnological types of springs were examined (helocrenes, limnocrenes and rheocrenes) 29 along the whole course of the river and a total of 35 water mite species were found. Our study 30 shows that flooding influences spring assemblages, causing a decrease in crenobiontic water 31 mites in flooded springs. The impact of intermittency resulted in a high percentage of species 32 typical of temporary water bodies. Surprisingly, the study revealed the positive impact of the 33 anthropogenic transformation of the river valley: preventing the riparian springs from flooding 34 enhances the diversity of crenobiontic species in non-flooded springs. In the conclusion our 35 study revealed that further conservation strategies for the protection of the riparian springs along 36 large rivers would take into account ongoing climatic changes and the positive impact of the 37 anthropogenic transformation of river valleys.

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Regeneration of the molluscan fauna of a small lowland river after dredging

Cited by 20 publications

References 0 publications

The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

Development of fauna of water beetles (Coleoptera) in waters bodies of a river valley – habitat factors, landscape and geomorphology

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