Klaus van de Weyer
YOU?
Author Swipe
View article: Characeen Österreichs. Checkliste, Atlas und Rote Liste der Armleuchteralgen (Charophyceae)*
Characeen Österreichs. Checkliste, Atlas und Rote Liste der Armleuchteralgen (Charophyceae)* Open
In the course of the project “Charophytes of Austria”, 7.577 records of stoneworts have been documented from 2005 to 2025. With the collected data and considering also historical records, we compiled a monograph of this group for the first…
View article: Facilitation of Lake Eutrophication by Altered Feedback Loops Between Submerged Macrophyte Vegetation and Phosphorus Retention
Facilitation of Lake Eutrophication by Altered Feedback Loops Between Submerged Macrophyte Vegetation and Phosphorus Retention Open
Charophytes (stoneworts) often dominate the submerged vegetation in nutrient‐poor hardwater lakes, where they support high benthic phosphorus (P) retention. As a consequence, epilimnion P concentrations remain low and water clarity high, r…
View article: Characeen Österreichs. Checkliste, Atlas und Rote Liste der Armleuchteralgen (Charophyceae)
Characeen Österreichs. Checkliste, Atlas und Rote Liste der Armleuchteralgen (Charophyceae) Open
Im Zuge des Projektes „Characeen Österreichs‟ wurden von 2005 bis 2025 7.577 Funddaten von Armleuchteralgen (Characeae) dokumentiert. Erstmals gibt es nun eine Monografie der Characeen Österreichs mit Checkliste, Verbreitungskarten der Art…
View article: Hydrological and ecological effects of floating photovoltaic systems: a model comparison considering mussel, periphyton, and macrophyte growth
Hydrological and ecological effects of floating photovoltaic systems: a model comparison considering mussel, periphyton, and macrophyte growth Open
Floating photovoltaic (FPV) systems are increasingly deployed on gravel pit lakes to generate renewable energy and mitigate land-use conflicts. However, their environmental impacts on hydrological and ecological processes remain insufficie…
View article: A Contribution to a Better Understanding of the Nitella axillaris Group (Charales, Charophyceae): A Taxonomic Re-Examination of the Nitella translucens Collected in the Province of Ferrara, Italy
A Contribution to a Better Understanding of the Nitella axillaris Group (Charales, Charophyceae): A Taxonomic Re-Examination of the Nitella translucens Collected in the Province of Ferrara, Italy Open
The identification of a charophyte population found in a rice field in Ferrara, North Italy, collected in 1999 and initially identified as Nitella translucens, has been reevaluated. Detailed morphological observations here reported have su…
View article: Correction: Blindow et al. Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species. Plants 2021, 10, 1830
Correction: Blindow et al. Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species. Plants 2021, 10, 1830 Open
In the original publication [...]
View article: Frontmatter
Frontmatter Open
View article: Frontmatter
Frontmatter Open
View article: Plastid DNA sequences and oospore characters of some European taxa of Tolypella section Tolypella (Characeae) identify five clusters, including one new cryptic Tolypella taxon from Sardinia, but they do not coincide with current morphological descriptions
Plastid DNA sequences and oospore characters of some European taxa of Tolypella section Tolypella (Characeae) identify five clusters, including one new cryptic Tolypella taxon from Sardinia, but they do not coincide with current morphological descriptions Open
In Europe, the genus Tolypella (Characeae) comprises four to eight Tolypella taxa in sections Rothia and Tolypella that have been distinguished by vegetative morphology and gametangial characters such as antheridial size and oospore wall o…
View article: Plastid DNA sequences and oospore characters of some European species of<i>Tolypella</i>section<i>Tolypella</i>(Obtusifolia, Characeae) indicate a new cryptic<i>Tolypella</i>species from the Mediterranean island Sardinia
Plastid DNA sequences and oospore characters of some European species of<i>Tolypella</i>section<i>Tolypella</i>(Obtusifolia, Characeae) indicate a new cryptic<i>Tolypella</i>species from the Mediterranean island Sardinia Open
In Europe, the genus Tolypella (Characeae) comprises four to eight Tolypella species in sections Rothia and Tolypella that have been distinguished by vegetative morphology and gametangial characters such as antheridial size and oospore cel…
View article: Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species
Re-Establishment Techniques and Transplantations of Charophytes to Support Threatened Species Open
Re-establishment of submerged macrophytes and especially charophyte vegetation is a common aim in lake management. If revegetation does not happen spontaneously, transplantations may be a suitable option. Only rarely have transplantations …
View article: Kurze Mitteilung zu Rions Wasser-Hahnenfuß (Ranunculus rionii Lagger) in der Talsperre Kelbra – Erstfund für Sachsen-Anhalt
Kurze Mitteilung zu Rions Wasser-Hahnenfuß (Ranunculus rionii Lagger) in der Talsperre Kelbra – Erstfund für Sachsen-Anhalt Open
Im Jahr 2019 gelang ein Fund von Rions Wasser-Hahnenfuß (Ranunculus rionii Lagger) in der Talsperre Kelbra. Hierbei handelt es sich um den Erstfund für Sachsen-Anhalt. Anmerkungen zur Bestimmung von Ranunculus rionii werden gegeben.
View article: Decades needed for ecosystem components to respond to a sharp and drastic phosphorus load reduction
Decades needed for ecosystem components to respond to a sharp and drastic phosphorus load reduction Open
Lake Tegel is an extreme case of restoration: inflow treatment reduced its main external phosphorus (TP) load 40-fold, sharply focused in time, and low-P water flushed the lake volume ≈ 4 times per year. We analysed 35 years of data for th…
View article: Tolypella glomerata ook op de rechteroever van de Beneden-Zeeschelde (Antwerpen, Ekeren)
Tolypella glomerata ook op de rechteroever van de Beneden-Zeeschelde (Antwerpen, Ekeren) Open
Tolypella glomerata also present on the right bank of the Lower-Zeescheldt (Antwerpen, Ekeren). – The rare charophyte Tolypella glomerata, discovered on the left bank of the Scheldt River in 2018, was also recorded 12 km …
View article: Mutual Facilitation Among Invading Nuttall’s Waterweed and Quagga Mussels
Mutual Facilitation Among Invading Nuttall’s Waterweed and Quagga Mussels Open
Nuttall's waterweed (Elodea nuttallii) is the most abundant invasive aquatic plant species in several European countries. Elodea populations often follow a boom-bust cycle, but the causes and consequences of this dynamics are…
View article: The occurrence of sexual<i>Chara canescens</i>(Charales, Charophyceae) in Sardinia (Italy)
The occurrence of sexual<i>Chara canescens</i>(Charales, Charophyceae) in Sardinia (Italy) Open
Chara canescens Loisel. is the only haplostichous charophyte species in Europe. Populations with parthenogenetically reproducing females have been described from several European locations. In contrast, populations with female and male ind…
View article: New records and observations to the Characean flora (Charales, Charophyceae) of Sicily (Italy)
New records and observations to the Characean flora (Charales, Charophyceae) of Sicily (Italy) Open
New records to the Characean flora of Sicily are presented. Five species (Chara baltica, C. conimbrigensis, C. oedophylla, Nitella gracilis, Tolypella salina) are new to Sicily, two of them being also new to Italy (Chara conimbrigensis, C.…
View article: Response of Submerged Macrophyte Communities to External and Internal Restoration Measures in North Temperate Shallow Lakes
Response of Submerged Macrophyte Communities to External and Internal Restoration Measures in North Temperate Shallow Lakes Open
Submerged macrophytes play a key role in north temperate shallow lakes by stabilizing clear-water conditions. Eutrophication has resulted in macrophyte loss and shifts to turbid conditions in many lakes. Considerable efforts have been devo…
View article: Changes in submerged macrophyte colonization in shallow areas of an oligo-mesotrophic lake and the potential role of groundwater
Changes in submerged macrophyte colonization in shallow areas of an oligo-mesotrophic lake and the potential role of groundwater Open
View article: Macrophytic vegetation in the oligotrophic Mediterranean Lake Vrana (Island of Cres, Northern Adriatic) – New insight after 50 years
Macrophytic vegetation in the oligotrophic Mediterranean Lake Vrana (Island of Cres, Northern Adriatic) – New insight after 50 years Open
View article: Südlicher und Gewöhnlicher Wasserschlauch: Wasserpflanzen des Jahres 2015
Südlicher und Gewöhnlicher Wasserschlauch: Wasserpflanzen des Jahres 2015 Open
Utricularia vulgaris und U. australis sind die Wasserpflanzen des Jahres 2015. Mit ihren Fangblasen haben diese karnivoren Pflanzen einen einmaligen Fangmechanismus entwickelt, der ausführlich beschrieben wird. Standort, Morphologie und Ök…