Temporal changes in periphytic meiofauna in lakes of different trophic states

Schroeder, Fabian; Traunspurger, Walter; Pettersson, Kurt; Peters, Lars

doi:10.4081/jlimnol.2012.e23

Cited by 36 publications

(32 citation statements)

References 46 publications

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“…While the temporal dynamics of lentic sediment-dwelling nematodes were detailed investigated in several studies [31][32][33][34] in the periphyton up to now only temporal fluctuations of the meiofauna assemblage and the total nematode abundance were analyzed (refer to previous studies of refs. [11,19]). A more species specific evaluation of the seasonality in periphytic nematodes is still lacking and simple questions such as at which time of the year do the most species occur, do the species develop at different times within the year, and how is the age structure and sex ratios within a nematode population are not answered yet.…”

Section: Introductionmentioning

confidence: 99%

“…Nematodes usually dominate meiofaunal communities dwelling lake and stream periphyton, with maximum densities exceeding 1000 individuals per cm 2 [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Due to their high turn-over rate (P/B ratio) and short life cycle they can account for up to 55% of total meiofaunal production [11]. Nematodes also play an important role in the food web, serving as food for larger meiofauna, macrofauna, and fishes [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Nematodes in the periphyton of lakes: Variations in diversity, species composition, age structure, and sex ratio

Schroeder

Peters

Traunspurger

2013

Internat. Rev. Hydrobiol.

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Temporal fluctuations in the diversity, sex ratio, age, and species composition of free-living nematodes inhabiting the periphyton of stony hard-substrates were determined in three Swedish lakes differing in trophic state. Over a two-year sampling period, different temporal patterns were observed. In the oligotrophic lake, nematode diversity showed moderate fluctuations and peaked in early summer. Diversity in meso-and eutrophic lakes showed the opposite pattern. Species composition changed along seasons, enabling to identify typical early and late season assemblages. This succession was linked to different reproduction periods of dominant species. The age structure and sex ratio of periphytic nematode communities varied both temporally and between lakes according to species traits. As an example, the male/female ratio increased with increasing lake trophic state. This trend reflects the decrease of partenogenetically reproducing species with increasing lake trophic state, and may be further considered as an indicator of lake trophic state.

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Section: Introductionmentioning

confidence: 99%

“…Nematodes usually dominate meiofaunal communities dwelling lake and stream periphyton, with maximum densities exceeding 1000 individuals per cm 2 [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Nematodes in the periphyton of lakes: Variations in diversity, species composition, age structure, and sex ratio

Schroeder

Peters

Traunspurger

2013

Internat. Rev. Hydrobiol.

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“…sp.) (Galassi et al 2002;Giere 2009;Schroeder et al 2012), while the individuals larger than 1000 µm during their entire life span, and taxa smaller than this size threshold, but known to reach macro sizes in their mature stages (i.e., Oligochaeta, Amphipoda and insect larvae/pupae/adults) were classified as "temporary meiofauna" + "macrofauna", respectively (Hauer & Resh 2007). Daphnia sp.…”

Section: Laboratory Proceduresmentioning

confidence: 99%

“…Meiofauna refer to benthic animals collected by the usage of a standardized mesh size ranging from 50-1000 µm (Giere 2009;Schroeder et al 2012). Their size range partially overlaps with macroinvertebrate sizes, i.e., with early life stages of many macroinvertebrates.…”

Section: Introductionmentioning

confidence: 99%

Meiofauna constitute a considerable portion of invertebrate drift among moss-rich patches within a karst hydrosystem

Perić¹,

Dražina²,

Špoljar³

et al. 2014

Biologia

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Aiming to establish the most frequent invertebrate taxa in drift at the small spatial scale within a moss-rich karst tufa-precipitating hydrosystem, we sampled drift among microhabitats differing in substratum type and flow conditions along a tufa barrier-cascading lotic reach. Additionally, we addressed the question of the contribution and the potential significance of meiofauna within the overall invertebrate drift at the small spatial scale. During the study period, a total of 60 invertebrate taxa were recorded in the drift. Six of these taxa belonged to the annelid/arthropod meiofauna and they represented 35% of total drift density. Macroinvertebrates found in drift were represented mainly by larval insects. The composition of the most abundant taxa in total drift was as follows: Alona spp. (Cladocera 26.7%), Riolus spp. (Coleoptera: Elmidae 13.2%), Simulium spp. (Diptera: Simuliidae 12.2%), Enchytraeidae (Oligochaeta 10.4%), Hydrachnidia (6.3%), Orthocladinae (Diptera: Chironomidae 3.9%) and Naididae (Oligochaeta 3.6%). Faunal drift densities and amounts of transported particulate matter (PM) were highest at the fast-flowing sites located at the barriers and lowest at the slowflowing sites within pools. Similarly to the seasonal amounts of transported PM, faunal drift was lowest in winter, and peaked in autumn and in late spring/early summer. Correlation between flow velocity and PM-faunal drift densities suggested a significant effect of the dislodged PM, though a minor influence of discharge and flow velocity on faunal drift. We suggest that the small-scale habitat heterogeneity and the respective feeding and refugial strategies of the fauna, as well as faunal passive dislodgement initiated by the shear forces of the flow were the most important drivers of observed drift patterns.

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The food web perspective on aquatic biofilms

Weitere

Erken

Majdi

et al. 2018

Ecological Monographs

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Biofilms, the complex communities of microbiota that live in association with aquatic interfaces, are considered to be hotspots of microbial life in many aquatic ecosystems. Although the importance of attached algae and bacteria is widely recognized, the role of the highly abundant biofilm‐dwelling micrograzers (i.e., heterotrophic protists and small metazoans) is poorly understood. Studies often highlight the resistance of bacterial biofilms to grazing within the microbial food web and therefore argue that the micrograzers have a modulating role (i.e., have effects on biofilm phenotype) rather than a direct trophic role within biofilms. In the present review, we show that this view comes too short, and we establish a conceptual framework of biofilm food webs consisting of three major elements. (1) Energy pathways and subsidization from plankton. As inhabitants of interfaces, biofilm‐dwelling grazers potentially access both planktonic organisms and surface‐associated organisms. They can play an important role in importing planktonic production into the biofilm food web and thus in the coupling of the planktonic and benthic food webs. Nevertheless, specialized grazers are also able to utilize significant amounts of autochthonous biofilm production. (2) Horizontal complexity of the basal food web. While bacteria and algae within biofilms are edible in general, food quality and accessibility of both bacteria and algae can differ considerably between different prey phenotypes occurring during biofilm formation with respect to morphology, chemical defense, and nutrient stoichiometry. Instead of considering bacteria and algae within biofilms to be generally resistant to feeding by micrograzers, we suggest considering a horizontal food‐quality axis to be at the base of biofilm food webs. This food quality gradient is probably associated with increasing costs for the micrograzers. (3) Vertical food web complexity and food chain length. In addition to the consumption of bacteria and algae, many predatory micrograzers exist within biofilm food webs. With the help of video microscopy, we were able to demonstrate the existence of a complex food web with several trophic levels within biofilms. Our conceptual framework should assist in integrating food web concepts and processes into whole‐biofilm budgets and in understanding food‐web‐related interactions within biofilms.

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Temporal changes in periphytic meiofauna in lakes of different trophic states

Abstract: Meiofaunal organisms in the periphyton of stony hard-substrates (epilithon) were studied in three Swedish lakes with different trophic states (oligo-, meso-and eutrophic)

Cited by 36 publications

References 46 publications

Nematodes in the periphyton of lakes: Variations in diversity, species composition, age structure, and sex ratio

Nematodes in the periphyton of lakes: Variations in diversity, species composition, age structure, and sex ratio

Meiofauna constitute a considerable portion of invertebrate drift among moss-rich patches within a karst hydrosystem

The food web perspective on aquatic biofilms

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