Aquatic macrophytes and water current velocity in the Danube River

Janauer, Georg A.; Schmidt-Mumm, Udo; Schmidt, Brigitte

doi:10.1016/j.ecoleng.2010.05.002

Cited by 77 publications

(41 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…M. spicatum was the only macrophyte species, which grew there. Water currents are among the strongest environmental variables determining the occurrence and/or abundance of aquatic plants (Janauer et al 2010). The occurrence and preference of M. spicatum to the faster flowing waters and hard substrates has been already observed (Butcher 1933;Bernez et al 2004;Hrivnák et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Spatial pattern of native species Myriophyllum spicatum and invasive alien species Elodea nuttallii after introduction of the latter one into the Drava River (Slovenia)

Grudnik

Germ

2013

Biologia

View full text Add to dashboard Cite

Invasive alien species Elodea nuttallii was introduced into the Drava River (Slovenia) in 2007. The spatial distribution of native macrophyte species Myriophyllum spicatum and the invasive alien species E. nuttallii was studied in two impoundments, HPP Vuhred and HPP Mariborski otok in the years 2009, 2010 and 2011. The very heterogeneous environment of the Drava River had resulted in dynamic and non-uniform distributions of E. nuttalli and M. spicatum in both impoundments. The distribution of E. nuttalli was shown to be suppressed in river stretches exposed to great turbulence. It had, however, successfully invaded areas with gentle slope of littoral, low exposition to main water flow and muddy sediment and prevailed against the native species M. spicatum. The latter was more abundant than E. nuttallii in stretches exposed to higher flow velocity. Thus, the competitive success of M. spicatum and E. nuttallii depended on environmental conditions. Our results lead to the prediction that E. nuttallii will increase further in the river Drava, causing serious economic problems.

show abstract

Section: Discussionmentioning

confidence: 99%

Spatial pattern of native species Myriophyllum spicatum and invasive alien species Elodea nuttallii after introduction of the latter one into the Drava River (Slovenia)

Grudnik

Germ

2013

Biologia

View full text Add to dashboard Cite

show abstract

“…flow and shading are of crucial importance for the development and productivity of macrophytes [25][26][27][28][29][30][31][32].…”

Section: Discussionmentioning

confidence: 99%

Relationship between plant life forms and ecological indices in a lacustrine ecosystem

2011

View full text Add to dashboard Cite

This study is the first to analyze the relationship between ecological indices (substrate moisture, nutrient content, substrate dispersion/aeration, substrate pH and humus content) and life forms of the vascular flora in and around Lake Provala; these relationships may serve as reliable indicators of the ecological conditions prevailing in this ecosystem. Since the development of certain life forms, in addition to climatic conditions, depends on plant requirements for several major environmental factors expressed as ecological indices, we established the relationship between the ecological index and life form of vascular plants collected over an eight year period in this system using correspondence analysis. We found a significant correlation between the development of certain life forms and levels of substrate moisture, nutrient content and substrate dispersion/aeration. These relationships help explain the predominance of hemicryptophytes and hydro-helophytes in the riparian zone of the lake, as these forms are perfectly adapted to water-saturated or aquatic environments rich in nutrients and relatively well aerated. There was no significant relationship between life forms and substrate pH or the content of organo-mineral compounds (humus) in the soil.

show abstract

“…In the karstic Krka River (Slovenia), sediment type, flow velocity and water depth were parameters that result in a mosaic of habitats (Germ et al 2004). Janauer et al (2010) also reported that flow velocity influences the occurrence of macrophytes in the Danube River. Bottom structure, the width of the riparian zone, retention devices in a channel and land use beyond the riparian zone significantly affected the macrophyte community in Slovenian karstic watercourses (Šraj-Kržič et al 2007;Mechora et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Ecological characteristics of plant species and associations along two Dinaric karstic rivers (Bosnia and Herzegovina, the Balkans)

et al. 2013

View full text Add to dashboard Cite

This paper describes the plant communities of two oligotrophic karstic rivers with a slight anthropogenic influence -the Trebižat and the Lištica -in South Bosnia and Herzegovina, their sinecology, and the relationship between vegetation and plant species and environmental parameters. According to 87 relevés, a total of 26 plant associations, using Braun-Blanquet methods, were found in the rivers and nearby surveyed area. Only nine associations were common to both rivers. Eight associations were recorded for the territory of Bosnia and Herzegovina for the first time. Associations from both rivers differed according to following parameters measured at the sampling site: water temperature, distance from the mouth (river kilometers), river width, water depth, flow, pH and slope. There were no differences in nutrient concentrations among the associations. According to Canonical Correspondence Analysis (CCA), three environmental variables out of the 11 initially considered were retained as being related to plant distribution. The first two axes explained 56.8% and 35.2% of variance of species-environment relationship in the Trebižat and Lištica rivers, respectively. Water depth in the Trebižat River, and pH and river kilometers in the Lištica River were found to be the most influential, while nutrients and other physico-chemical parameters were not significant in either river. Water depth vector was identified as an underlying environmental factor determining distribution of Potamogeton lucens and Myriophyllum verticillatum (Potamion), and Nymphaea alba (Nymphaeion albae). According to in situ measurements of light intensity, the highest coefficients of light attenuation, radiance and reflection were found at a station with dense populations of Potamogeton lucens and Nuphar luteum (Potametum lucentis). The vegetation and floristic value of the rivers is discussed as a basis for biodiversity conservation programmes and evaluating the state of these ecosystems in the future.

show abstract

Aquatic macrophytes and water current velocity in the Danube River

Cited by 77 publications

References 34 publications

Spatial pattern of native species Myriophyllum spicatum and invasive alien species Elodea nuttallii after introduction of the latter one into the Drava River (Slovenia)

Spatial pattern of native species Myriophyllum spicatum and invasive alien species Elodea nuttallii after introduction of the latter one into the Drava River (Slovenia)

Relationship between plant life forms and ecological indices in a lacustrine ecosystem

Ecological characteristics of plant species and associations along two Dinaric karstic rivers (Bosnia and Herzegovina, the Balkans)

Contact Info

Product

Resources

About