Effects of habitat types and within lake environmental gradients on the diversity of chironomid assemblages

Árva, Diána; Specziár, András; Erős, Tibor; Tóth, Mónika

doi:10.1016/j.limno.2015.05.004

Cited by 13 publications

(3 citation statements)

References 60 publications

(2 reference statements)

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“…In our experimental design, we considered a single set of mean environmental parameters for each lake, which is the only type of environmental data available. However, large lakes are known to be environmentally heterogeneous (Árva et al 2015). We observe an underestimation of the potential species richness exclusively in clear and intermediate lakes, but not in turbid lakes.…”

Section: Discussionmentioning

confidence: 99%

Synergistic effects between global warming and water quality change on modelled macrophyte species richness

Lewerentz,

Hoffmann,

Hovestadt

et al. 2023

Oikos

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Submerged freshwater macrophytes are crucial for the functioning of lakes. Their growth and survival follow environmental conditions like light, temperature, and nutrient availability. Hence, the impending increase in water temperature as well as changes of nutrients and turbidity will lead to changes in macrophyte geographic and depth distribution: Herein, we assess these potential changes. We apply an eco‐physiological macrophyte growth model to simulate biomass growth and survival of virtual species defined by random trait combinations within expert‐derived trait ranges for oligotraphentic, mesotraphentic, and eutraphentic species groups in deep lakes in Bavaria, Germany, which cover clear, moderate, and turbid lake conditions. The emergent potential species richness is compared with empirically observed species richness to evaluate general predictions for current conditions. Thereafter, we apply the model to scenarios of temperature increase and of turbidity and nutrient change to assess potential changes in species richness and the influence of species' traits on being an environmental change ‘winner' or ‘loser'. We find a cross‐lake, hump‐shaped pattern of potential species richness along depth. This largely reflects observed patterns, although mismatches were also detected and might be explained by missing processes and environmental heterogeneity within the lake. Rising temperature leads to increased richness of potential species in all lake types, species groups, and depths. Turbidity and nutrient change effects depend on depth and lake type. ‘Loser species' under increased turbidity and nutrient level are light consumptive and sensible to disturbances, while ‘winner species' have a high biomass production. These findings show that the hump‐shaped depth distributions of submerged macrophyte diversity can emerge solely considering eco‐physiology. The differential responses to environmental changes imply that management measures must account for lake type because those responses can have opposite trends depending on lake depth and type.

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Section: Discussionmentioning

confidence: 99%

Synergistic effects between global warming and water quality change on modelled macrophyte species richness

Lewerentz,

Hoffmann,

Hovestadt

et al. 2023

Oikos

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“…The lack of an asymptote in the rarefaction curves indicates the presence of sporadic species in the samples. The underestimation of taxa richness in lakes, as in rivers, is very common in many cases [12,13,[63][64][65]. In freshwater ecosystems, benthic macroinvertebrates are typically a highly diverse group [12] and tend to be dominated by rare species [66,67].…”

Section: Discussionmentioning

confidence: 99%

Suggested Sampling Methodology for Lake Benthic Macroinvertebrates under the Requirements of the European Water Framework Directive

Ntislidou¹,

Bobori²,

Λαζαρίδου³

2021

Water

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The estimation of the number of samples required for reliably monitoring lakes’ benthic macroinvertebrates is difficult due to the natural variability and cost and time constraints. To determine a statistically robust and effective sampling design, we collected benthic macroinvertebrate samples from 15 Greek natural lakes. We compared the spatial and temporal variability of the benthic macroinvertebrate community composition to identify differences among lakes, between lake zones (sublittoral and profundal) and sampling periods. Furthermore, we examined the sampling precision and determined the number of required samples to attain maximum taxa richness. The diminution of the sampling effort was estimated and the desired precision level, considering different benthic macroinvertebrate abundances, was modelled. No temporal or spatial variation between lake zones was observed in communities’ compositions. The precision of our sampling design was adequate, and rarefaction curves revealed an adequate taxa richness (>70%). The developed model could be applied to assess the required sampling effort in lakes within the Mediterranean ecoregion with similar benthic macroinvertebrate abundances.

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“…On the other hand, Chironomidae are very abundant and diverse in lentic ecosystems. This family can dwell in a wide range of environmental conditions (Corbi & Trivinho-Strixino 2016, Saulino et al 2017, shows a good response to environmental degradation (Árva et al 2015(Árva et al , Brandimarte et al 2016, and is a potential biological indicator of climate changes (Ilyashuk & Ilyashuk 2007). Recently, Morais et al (2017) pointed out that water level depletion on hydropower reservoirs favours chironomids as early colonizers, as they rapidly colonize recently-flooded areas.…”

Section: Introductionmentioning

confidence: 99%

Effects of an atypical drought on the benthic macroinvertebrate community in a tropical reservoir

et al. 2018

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Atypical drought events have increasingly occurred in Brazil over the last years due to global climate changes. However, their consequences on aquatic biota in reservoirs are poorly known. We tested the hypothesis that macroinvertebrate communities are negatively affected by atypical drought events, given the sensitivity of many taxa to environmental changes. We predicted that: (a) there would be changes in limnological and sediment parameters between a regular year and an atypical year, (b) abundance and richness of the genera of Chironomidae and of exotic species would be higher due to the enhanced ability of these organisms to adapt to changes in the physical environment, and (c) community structure metrics (i. richness; ii. % richness; iii. abundance; iv. % abundance) would be affected by disturbance indices (i. Buffer Disturbance Index-BDI; ii. Local Disturbance Index-LDI; iii. Integrated Disturbance Index-IDI) in both years. The study was carried out in the reservoir of the Nova Ponte Hydroelectric Power Plant, state of Minas Gerais, comparing two sampling periods: a regular climatological year (2010) and an atypical drought year (2014). A total of 40 sampling sites were defined along the shore of the reservoir, and types of land use in the surrounding area of each site were measured, as well as physical habitat conditions, sediments, and benthic macroinvertebrate communities. Sampling was performed at these sites in the end of the rainy season in both years. The intensity of anthropogenic modifications was assessed at local scale and in the areas (buffers) surrounding the sampling sites using quantitative disturbance indices. There were striking differences in limnological parameters and sediment characteristics between sampling periods. Taxonomic richness was significantly lower in the drought year. As opposed to our predictions, richness and abundance of Chironomidae and exotic species did not increase with the atypical drought event. Besides, most community structure metrics showed a significant relationship with disturbance indices only during the regular climatological year, thus indicating that the large-scale effects of water stress may override the conditions of local habitats and the surrounding landscape. Therefore, in addition to a correct political-environmental management of water resources at local-scale, which includes maintaining the water quality and the riparian and landscape integrity, addressing large-scale climate issues is required for the maintenance of the ecological integrity of tropical reservoirs.

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Effects of habitat types and within lake environmental gradients on the diversity of chironomid assemblages

Cited by 13 publications

References 60 publications

Synergistic effects between global warming and water quality change on modelled macrophyte species richness

Synergistic effects between global warming and water quality change on modelled macrophyte species richness

Suggested Sampling Methodology for Lake Benthic Macroinvertebrates under the Requirements of the European Water Framework Directive

Effects of an atypical drought on the benthic macroinvertebrate community in a tropical reservoir

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