Article
Environmental Sciences
Natalie Corrales, Mariana Meerhoff, Dermot Antoniades
Summary: Studies have shown that glyphosate-based herbicides can have suppressive and stimulatory effects on diatoms in aquatic ecosystems, impacting community structure and diversity significantly.
ENVIRONMENTAL POLLUTION
(2021)
Article
Ecology
Yang Liu, Michele Tackx, Alain Dauta, Frederic Julien, Evelyne Buffan-Dubau
Summary: The study suggests that under high nitrate concentration conditions, high densities of rotifers enhance the nitrogen uptake capacity of phototrophic biofilms. Additionally, densities of rotifers and bacteria in biofilms are positively correlated under N - NO3- enriched conditions, indicating interaction between these two communities during the experimental period.
FRESHWATER BIOLOGY
(2021)
Article
Zoology
Axell K. Minowa, Andre R. S. Garraffoni
Summary: We contribute to the biodiversity knowledge of Brazilian Gastrotricha by reporting new records, providing morphometric, molecular, and phylogenetic data, and presenting the first electron microscopy record of D. lamellatus.
Article
Geography, Physical
Einer Sepulveda-Zuniga, Nora I. Maidana, Leonardo A. Villacis, Esteban A. Sagredo, Patricio I. Moreno
Summary: This study investigates the response of terrestrial and aquatic ecosystems in northwestern Patagonia to climatic and human influences during the last millennium. The findings suggest that human disturbances during historical times have exceeded the natural ranges of variability and resilience of these ecosystems, causing abrupt changes in biodiversity, species composition, and community structure.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Ecology
Kamela De Gallardo, Michael D. Kaller, D. Allen Rutherford, William E. Kelso
Summary: This study investigated periphytic algal assemblages in the Atchafalaya River Basin (ARB) and found that their composition and density shifted with river connectivity. The ARB sites had higher algal density, especially cyanobacteria and centric diatoms, while the isolated system was dominated by chlorophytes. Changes in periphytic algal assemblages due to floodplain alterations could have implications for higher trophic levels and should be considered in wetland management decisions.
Article
Chemistry, Medicinal
Renate Doving Osvik, Richard Andre Ingebrigtsen, Maria Fredrika Norrbin, Jeanette Hammer Andersen, Hans Christian Eilertsen, Espen Holst Hansen
Summary: The grazing pressure on the marine diatom Porosira glacialis can affect its metabolome and result in changes in bioactivity. Cocultivation with zooplankton increases the bioactivity of P. glacialis, but has no noticeable effect on the activity against biofilm formation and bacterial growth.
Article
Biotechnology & Applied Microbiology
Antonija Kulas, Petar Zutinic, Vesna Gulin Beljak, Renata Matonickin Kepcija, Mirela Sertic Peric, Sandi Orlic, Ines Svilicic Petric, Tamara Markovic, Marija Gligora Udovic
Summary: The purpose of this study was to obtain a detailed overview of the protist community structure in the periphyton of the Krka River and determine the differences in protist diversity along the river. The results showed that the main groups of protists were Ciliophora, Cercozoa, and Bacillariophyta. Protist diversity increased in the downstream direction of the river. The findings can provide effective ways to protect aquatic karst habitats in future management.
ANNALS OF MICROBIOLOGY
(2023)
Article
Agriculture, Multidisciplinary
David J. Augustine, Sean P. Kearney, Edward J. Raynor, Lauren M. Porensky, Justin D. Derner
Summary: Sustainable management of grazinglands requires understanding how management practices affect livestock movements. An experiment was conducted to compare the foraging behavior of cattle in a collaborative, adaptive rangeland management (CARM) system and a traditional rangeland management (TRM) system. CARM cattle showed more linear grazing pathways, slower grazing speed, and longer grazing bouts early in the season compared to TRM cattle.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Plant Sciences
Mailor Wellinton Wedig Amaral, Gabriela Medeiros, Vanessa Daufenbach, Morgana Suszek Goncalves, Thelma Alvim Veiga Ludwig, Norma Catarina Bueno
Summary: During a survey of freshwater epilithic diatoms in subtropical lotic environments in the Cascavel River microbasin, Parana State, Brazil, a new species of Nupela Vyverman et Compere, Nupela semifasciata sp. nov, was discovered. The species is characterized by elliptic-lanceolate valves with varying apices depending on size, and a gradual decrease in length/width ratio with decreasing size. The central area unilaterally reaches the margin and interrupts the row of areolae on the valve mantle, which is externally composed of a second row of areolae near the apices.
Article
Fisheries
Annie U. Villa-Franco, Milagros R. dela Pena, Marie Frances J. Nievales
Summary: This study evaluated the suitability of different diatom species as live food for early juveniles of Haliotis asinina. The findings suggest that Cocconeis sp., Nitzschia sp., Amphora sp., and N. ramosissima are suitable for feeding H. asinina early juveniles. This knowledge can contribute to the development of feeding protocols in hatcheries for maximizing production.
AQUACULTURE INTERNATIONAL
(2022)
Article
Environmental Sciences
James L. Pinckney
Summary: The purpose of this study was to examine the temporal changes in biomass, community composition, and net primary productivity (NPP) of benthic microalgae (BMA) in a supratidal salt panne. The study found that BMA biomass peaked in June and July, primarily composed of benthic diatoms. NPP reached its peak in July, but was lower compared to other BMA habitats.
ESTUARIES AND COASTS
(2023)
Article
Biodiversity Conservation
Cinthia Coutinho Rosa Favarettol, Priscila Izabel Tremarin, Gabriela Medeiros, Thelma Alvim Veiga Ludwig, Norma Catarina Bueno
Summary: This study analyzed Eunotia species from a stream in the surrounding area of the Iguacu National Park conservation unit, identifying a new species and eight new records for the state of Parana. The samples were collected monthly from September 2012 to August 2013 and analyzed using light and scanning electron microscopy, resulting in detailed measurements and illustrations of 21 infrageneric taxa of Eunotia.
Article
Ecology
Alejandra Goldenberg-Vilar, Cristina Delgado, Francisco J. Penas, Jose Barquin
Summary: Rivers globally are being intensively managed with unprecedented flow alterations, leading to a growing interest in the ecological response of organisms. This study found consistent patterns of change in diatom and macrophyte communities in Spanish river basins affected by dam-induced flow alterations, suggesting common thresholds of response to altered hydrological attributes. The most impacted hydrological indices were related to the magnitude and duration of minimum flows, highlighting the importance of considering interrelationships between different hydrological attributes in flow management.
Article
Biodiversity Conservation
Francesca Leasi, Joseph L. Sevigny, Brandon T. Hassett
Summary: Establishing robust estimates of polar marine biodiversity is important for interpreting future changes in the Arctic. Despite the recent increase in scientific expeditions, the region remains relatively underexplored, particularly in terms of small species like protists, fungi, and many small invertebrates known as meiofauna. The study used a metabarcoding approach to assess metazoan biodiversity in sea ice and sediment samples from Utqiagvik, Alaska, and found that season and habitat are significant predictors of meiofaunal biodiversity, supporting the use of meiofauna as indicators of climate change.
ECOLOGICAL INDICATORS
(2021)
Article
Ecology
Jefferson G. Lebkuecher, Jenna L. Atma, Hailey Conn, Daniel J. Redwine
Summary: The genus and composition of algae on rocks near the shore of reservoirs in Middle and East Tennessee were counted in order to analyze their correlation with trophic condition. The results showed that the concentration of epilithic chlorophyll a significantly correlated with the concentration of total phosphorus, but not with the concentration of total nitrogen. Using the concentration of epilithic chlorophyll a as an indicator, the trophic state of the sites was determined and this method provides a new tool for evaluating and monitoring the trophic state of infralittoral sites in reservoirs.
JOURNAL OF FRESHWATER ECOLOGY
(2023)
Article
Ecology
Benjamin Wilden, Nabil Majdi, Ute Kuhlicke, Thomas R. Neu, Walter Traunspurger
Review
Marine & Freshwater Biology
Walter Traunspurger, Benjamin Wilden, Nabil Majdi
Article
Ecology
Christoph Ptatscheck, Birgit Gansfort, Nabil Majdi, Walter Traunspurger
Review
Marine & Freshwater Biology
Nabil Majdi, Jenny M. Schmid-Araya, Walter Traunspurger
Review
Marine & Freshwater Biology
Jenny M. Schmid-Araya, Peter E. Schmid, Nabil Majdi, Walter Traunspurger
Editorial Material
Marine & Freshwater Biology
Nabil Majdi, Jenny M. Schmid-Araya, Walter Traunspurger
Article
Ecology
Nabil Majdi, Miriam Colls, Linette Weiss, Vicenc Acuna, Sergi Sabater, Walter Traunspurger
FRESHWATER BIOLOGY
(2020)
Article
Environmental Sciences
Julie Neury-Ormanni, Caroline Doose, Nabil Majdi, Jacky Vedrenne, Walter Traunspurger, Soizic Morin
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Biodiversity Conservation
Nabil Majdi, Jana Uthoff, Walter Traunspurger, Pascal Laffaille, Anthony Maire
ECOLOGICAL INDICATORS
(2020)
Article
Zoology
Bianca Kreuzinger-Janik, Nabil Majdi, Walter Traunspurger
Summary: This study provides insights into the diversity and abundance of meio-invertebrates living in mosses collected from different habitats along a Swedish lake, with underwater mosses near the shoreline hosting the most diverse community. The study shows that feeding types differ between habitats and the composition of nematode species can mirror ecological changes at the study site.
Article
Marine & Freshwater Biology
Mariia Kryvokhyzhyna, Nabil Majdi, Anna Oprei, Michael Mutz, Ute Risse-Buhl
Summary: The migration of stream sediments affects the structure and characteristics of meiobenthic communities, as well as the energy flow paths in benthic food webs.
Article
Biodiversity Conservation
Nabil Majdi, Lizaan de Necker, Hendrika Fourie, Ane Loggenberg, Edward C. Netherlands, Jasmine Bunte-Tschikin, Walter Traunspurger, Gerhard C. du Preez
Summary: Meiobenthos, or meiofauna, play an important role in linking microbial production to higher trophic levels in rivers. However, their communities in Africa remain poorly studied. This research sampled meio- and macrobenthic invertebrate communities along rivers in the Kruger National Park and found differences in community structure across rivers and along an upstream-downstream gradient. The results suggest that protected river reaches have a beneficial effect on benthic invertebrate diversity.
Article
Biodiversity Conservation
Bianca Kreuzinger-Janik, Walter Traunspurger, Nabil Majdi
Summary: Moss patches at the interface between terrestrial and limnic ecosystems are colonized by various types of animals. Mosses primarily serve as a substrate for epiphytic biofilms, which are the main food resource for invertebrates. The moss-dwelling community in the lake has lower trophic redundancy and occupies a larger isotopic space compared to the stream. The delta C-13 range is significantly larger in the lake, while the delta N-15 range is similar in both habitats. Despite their small body sizes, certain invertebrates may occupy apex positions in moss food webs.
Article
Marine & Freshwater Biology
Julia Pasqualini, Nabil Majdi, Mario Brauns
Summary: Estimates of secondary production are affected by sampling methods' efficiency in capturing macroinvertebrate community abundances and body lengths. The efficiency of common methods is poorly understood. Comparisons between a Surber sampler and a Freeze corer in a forested stream showed differences in macroinvertebrate abundance and biomass. The incomplete sampling of body lengths and abundance underestimated total secondary production by 48% (Surber) and 49% (Freeze corer). Reducing mesh size from 250 to 100 μm could decrease underestimation to about 12%. These results enhance the efficiency of sampling methods and provide reliable quantification of macroinvertebrate role in stream ecosystems.
Article
Zoology
Nabil Majdi, Hendrik Fueser, Marie-Theres Rauchschwalbe, Birgit Gansfort, Jana Uthoff, Bianca Kreuzinger-Janik, Christoph Ptatscheck, Janina Schenk, Stefanie Gehner, Hubert Spieth, Benjamin Wilden, Sebastian Hoss
Summary: In this article, we pay tribute to Professor Walter Traunspurger for his achievements and contributions to the fields of nematology and ecology. Throughout his career, he has supervised numerous students and published over 200 research articles in top-tier journals. His expertise and broad research interests have made him an invaluable source of knowledge and inspiration for his students and colleagues. By summarizing and sharing his scientific accomplishments, we hope to inspire the next generation of nematologists and ecologists to continue his legacy and explore the promising avenues of research he has opened up.