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Integration of Morphology-Based and Molecular Techniques to Study the Most Significant Diatom Order (Thalassiosirales) of Phytoplankton in the River Danube
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-14 DOI: 10.1111/fwb.14360
Éva Ács, János László Korponai, Keve Tihamér Kiss, Tibor Bíró, Mónika Duleba, István Grigorszky, József Szekeres, Edit Vadkerti, Imre Somlyai

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引用次数: 0
Correction to ‘Reciprocal Transplant Experiments Demonstrate a Dynamic Coevolutionary Relationship Between Parasitic Mussel Larvae and Bitterling Fishes’
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-13 DOI: 10.1111/fwb.14371

Anil A. N., I. Mehdi, K. Douda, C. Smith, and M. Reichard. 2024. “Reciprocal Transplant Experiments Demonstrate a Dynamic Coevolutionary Relationship Between Parasitic Mussel Larvae and Bitterling Fishes.” Freshwater Biology. https://doi.org/10.1111/fwb.14324.

In ‘Result’ section of this article (Section 3.2, pages 6 and 7), ‘χ2’ notation for the outcomes of six statistical tests has been transformed to ‘c2’ during copy editing. The numeric values are correct but should have been denoted by ‘χ2’ notation.

We apologise for this error.

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引用次数: 0
Effects of Hyporheic Water Exchange on Microbial Community Structure and Function: A Case Study in the Beiluo River, Loess Plateau, China
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-11 DOI: 10.1111/fwb.14361
Bin Tang, Jinxi Song, Junlong Zhang, Adnanul Rehman, Bingjie Li, Yongqing Long, Nan Li, Ruichen Mao, Jiayuan Feng, Junhang Chen, Shengsheng Zhou, Yue Qu

  1. Microbial communities in riverine hyporheic zones provide essential ecosystem services. However, the mechanisms whereby they respond to hyporheic water exchange under different habitat stress conditions remain poorly understood. Therefore, investigating the impact of riverine hyporheic exchange on the microbial community composition and its potential ecological function is essential, particularly in the seasonal rivers of northern China.
  2. To elucidate the structure and function of hyporheic zone sediment microbial communities in response hyporheic exchange and environmental fluctuations, we examined associations by performing in situ falling-head permeameter tests and eDNA techniques.
  3. The primary findings were as follows: (1) We detected variations in the spatial distribution patterns of streambed hydraulic conductivity (range, 0.055–3.490 m/day) and vertical fluxes (range, 1.886–342.0 mm/day) among different monitoring stations. (2) Microbial communities displayed compositional similarities and spatial heterogeneity. Stations with limited vertical exchange were characterised by reduced species diversity. (3) Prokaryotes showed better modularity characteristics with higher stability and functional diversity than eukaryotic communities. (4) Differences in the abundance of microbial metabolism and genetic functions were observed among different habitats.
  4. This study emphasises the significance of local hydrological patterns (such as downwelling) in maintaining riverine environmental elements and acting as hotspots for microbial diversity within the hyporheic zone. The heterogeneity of the hydrological patterns governing hyporheic water exchange can explain the abundance, species diversity and biogeochemical processes of microorganisms within this zone.
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引用次数: 0
Association Between Reduced Upstream Riparian Forest Cover and Impaired Development of Embryos From Eastern Hellbenders (Cryptobranchus alleganiensis)
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-09 DOI: 10.1111/fwb.14368
Holly A. Funkhouser, Brian F. Case, Jordy Groffen, Austin Holloway, William A. Hopkins

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引用次数: 0
Long-Term Declines in Body Size of the Invasive Rusty Crayfish (Faxonius rusticus) in Temperate Lakes
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-06 DOI: 10.1111/fwb.14366
Elle K. Sawyer, Timothy A. Kreps, David M. Lodge, Eric R. Larson

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引用次数: 0
Phenotypic Plasticity, Multiple Paternity, and Shell Shape Divergence Across Lake-Stream Habitats in a Freshwater Mussel Brood (Pyganodon grandis)
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-06 DOI: 10.1111/fwb.14358
Sean M. Keogh, Ben J. Minerich, Lindsay M. Ohlman, Madeline E. Pletta, Anna E. Scheunemann, Zoe K. Schroeder, Zebulin A. Secrist, Alex J. Franzen, Bernard E. Sietman, Andrew M. Simons

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引用次数: 0
Properties of Biofilm Prokaryotic and Eukaryotic Communities in a Representative Hypereutrophic Urban River
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-12-04 DOI: 10.1111/fwb.14365
Yi Lv, Siyu Wang, Xiaobo Ni, Xu Yang, Yu Chen, Xinting Zhou, Randy A. Dahlgren, Xianlei Cai
<div> <p> </p><ol> <li>Biofilms play an important role in nutrient and food web dynamics of shallow aquatic ecosystems. Multiple prokaryotic and eukaryotic microorganisms within biofilms interact with each other to shape the community structure and their functional attributes. However, there is no clear understanding of varied patterns of biofilm prokaryotic versus eukaryotic microbial abundances, diversities and communities, which limit our understanding of how biofilm communities and functions in hypereutrophic urban river ecosystems are changing.</li> <li>To elucidate the properties of biofilm communities and controls on biofilm communities in a hypereutrophic urban river, we conducted a one-year study to investigate the seasonal and water-depth variations on the abundance/biomass, diversity and structure of biofilm prokaryotic and eukaryotic communities. The structure and dynamics of biofilm prokaryotic and eukaryotic communities were determined by high-throughput sequencing based on the 16S and 18S rRNA gene.</li> <li>Sequencing revealed that <i>Proteobacteria</i>, <i>Bacteroidota</i> and <i>Cyanobacteria</i> were the three dominant phyla in biofilm prokaryotic communities, and <i>Rotifera</i>, <i>Chlorophyta</i>, <i>Annelida</i> and <i>Bacillariophyta</i> were the four dominant phyla in biofilm eukaryotic communities. Biofilm bacterial abundance depended mainly on the water temperature, whereas biofilm algal biomass correlated with rotifer grazing and light levels. Prokaryotic communities had higher species richness and diversity than eukaryotic communities. Species richness and diversity displayed significant seasonal variations with minima for prokaryotic communities in winter and eukaryotic communities in summer, which were linked to water temperature and rotifer grazing, respectively. Variations in biofilm prokaryotic and eukaryotic community composition were mainly related to ammonia concentration and water temperature, respectively. The co-occurrence network analysis suggested that rotifer grazing could considerably decrease the complexity of the biofilm network in summer, and the algal groups, especially for <i>Chlorophyta</i> and <i>Bacillariophyta</i>, were the key to the formation of stable biofilm networks.</li> <li>There were significant differences in seasonal and water-depth heterogeneity of biofilm prokaryotic and eukaryotic community composition. Our findings indicate that variations in water temperature, light level, rotifer grazing and nutrients (especially ammonia) appreciably contribute to changes in the abundance, diversity and composition of biofilm prokaryotic versus eukaryotic communities in the hypereutrophic urban river.</li> <li>These findings increase our understanding of biofilm community
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引用次数: 0
Size Matters: The Effects of Polystyrene Nanoplastics on Parasite Transmission in the Daphnia-Metschnikowia Host–Parasite System
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-11-29 DOI: 10.1111/fwb.14359
Lukas Webb, Florent Manzi, Justyna Wolinska

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引用次数: 0
Do Mouth-Infecting Parasites Alter the Foraging Ecology of Host Fish? A Test With the Parasitic Copepod Salmincola markewitschi and White-Spotted Charr Salvelinus leucomaenis
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-11-29 DOI: 10.1111/fwb.14362
Ryota Hasegawa, Itsuro Koizumi

  1. Many parasites infect host mouth cavities and are expected to physically impede host foraging. Despite these potential impacts, few studies have evaluated host foraging activities and their findings are equivocal.
  2. We examined the effects of the mouth-infecting copepod, Salmincola markewitschi, on wild white-spotted charr Salvelinus leucomaenis foraging using stomach contents analysis. Because the mouth-infecting copepod occupies a large space in the host mouth cavity, we hypothesized that infected fish exhibit reduced stomach fullness and total prey consumed compared to uninfected fish. In addition, we also hypothesized that infected fish shift their main diets from terrestrial to aquatic invertebrates because parasites reduce host activity, body condition and competitive ability.
  3. Contrary to our predictions, stomach fullness and total prey consumed were not significantly different between infected and uninfected fish: smaller infected fish consumed more prey. We also found that smaller infected hosts foraged on a lower proportion of terrestrial invertebrates than their uninfected counterparts.
  4. Our results suggest that small infected fish increased foraging activities to compensate for energetic loss induced by infection. They also shifted their diet from large terrestrial to small aquatic invertebrates, possibly due to physical impediments and reduced competitive abilities associated with copepod infection.
  5. Our study indicates that mouth-infecting parasites affect host foraging ecology, but the impacts are weaker than expected and depend on host body size. Nonetheless, behavioural shifts could have important ecological consequences such as loss of host fitness and strengthening trophic cascades in aquatic ecosystems.
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引用次数: 0
Issue Information - Cover and Ed Board 发行信息 - 封面和 Ed Board
IF 2.8 2区 生物学 Q2 ECOLOGY Pub Date : 2024-11-23 DOI: 10.1111/fwb.14136
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引用次数: 0
期刊
Freshwater Biology
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