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100 results for “Aquatic insects”
Data from: Elevated temperatures translate into reduced dispersal abilities in a natural population of an aquatic insect
1. Rising global temperatures force many species to shift their distribution ranges. However, whether or not (and how fast) such range shifts occur depends on species' dispersal capacities. In most ecological studies, dispersal-related traits (such as the wing size or wing loading in insects) are treated as fixed, species-specific characteristics, ignoring the important role of phenotypic plasticity during insect development. 2. We tested the hypothesis that dispersal-related traits themselves vary in dependence of ambient environmental conditions (temperature regimes, discharge patterns and biotic interactions during individual development). 3. We collected data over 8 years from a natural population of the crane fly Tipula maxima in central Germany. Using linear mixed-effect models, we analysed how phenotypic traits, phenological characteristics and population densities are affected by environmental conditions during the preceding 3, 6 and 12 months. 4. We found a moderate (5.6%) increase in wing length per 1°C increase of mean annual temperatures during the previous year. At the same time, body weight increased by as much as 17.8% in females and 26.9% in males per 1°C, likely driven by increased habitat productivity, which resulted in a 16.4% (female) and 19.3% (male) increased wing loading. We further found a shorter, more synchronized emergence period (i.e., a narrower time frame for dispersal) with increasing temperatures. 5. Altogether, our results suggest that dispersal abilities of T. maxima were negatively affected by elevated temperatures, and we discuss how similar patterns might affect the persistence of populations of other aquatic insects, especially stenoecious taxa with narrow distribution ranges. Our study calls for integration of information on temperature-induced phenotypic plasticity of dispersal-related traits into models forecasting range shifts in the face of climate change. Furthermore, the patterns reported here are likely to affect metapopulation dynamics of aquatic insects under climate change conditions and may contribute to the ongoing decline of insect biomass and diversity.
Data from:Microgeographic differentiation in thermal performance curves between rural and urban populations of an aquatic insect
The rapidly increasing rate of urbanization has a major impact on the ecology and evolution of species. While increased temperatures are a key aspect of urbanization ("urban heat islands"), we have very limited knowledge whether this generates differentiation in thermal responses between rural and urban populations. In a common garden experiment, we compared the thermal performance curves (TPCs) for growth rate and mortality in larvae of the damselfly Coenagrion puella from three urban and three rural populations. TPCs for growth rate shifted vertically, consistent with the faster-slower theoretical model whereby the cold-adapted rural larvae grew faster than the warm-adapted urban larvae across temperatures. In line with costs of rapid growth, rural larvae showed lower survival than urban larvae across temperatures. The relatively lower temperatures, hence expected shorter growing seasons in rural populations compared to the populations in the urban heat islands likely impose stronger time constraints to reach a certain developmental stage before winter, thereby selecting for faster growth rates. In addition, higher predation rates at higher temperature may have contributed to the growth rate differences between urban and rural ponds. A faster-slower differentiation in TPCs may be a widespread pattern along the urbanization gradient. The observed microgeographic differentiation in TPCs supports the view that urbanization may drive life history evolution. Moreover, because of the urban heat island effect, urban environments have the potential to aid in developing predictions on the impact of climate change on rural populations.
Data from: Trait-environment relationships could alter the spatial and temporal characteristics of aquatic insect subsidies at the macrospatial scale
<p>Ecological flows across ecosystem boundaries are typically studied at spatial scales that limit our understanding of broad geographical patterns in ecosystem linkages. Aquatic insects that metamorphose into terrestrial adults are important resource subsidies for terrestrial ecosystems. Traits related to their development and dispersal should determine their availability to terrestrial consumers. Here, we synthesize geospatial, aquatic biomonitoring and biological traits data to quantify the relative importance of several environmental gradients on the potential spatial and temporal characteristics of aquatic insect subsidies across the contiguous United States. We found the trait composition of benthic macroinvertebrate communities varies among hydrologic regions and could affect how aquatic insects transport subsidies as adults. Further, several trait-environment relationships were underpinned by hydrology. Large bodied taxa that could disperse further from the stream were associated with hydrologically stable conditions. Alternatively, hydrologically variable conditions were associated with multivoltine taxa that could extend the duration of subsidies with periodic emergence events throughout the year. We also found that anthropogenic impacts decrease the frequency of individuals with adult flight but potentially extend the distance subsidies travel into the terrestrial ecosystem. Collectively, these results suggest that natural and anthropogenic gradients could affect aquatic insect subsidies by changing the trait composition of benthic macroinvertebrate communities. The conceptual framework and trait-environment relationships we present shows promise for understanding broad geographical patterns in linkages between ecosystems.</p>
Figure 2 in Effects of forest conversion on tce assemblages' structure of aquatic insects in subtropical regions
Figure 2. Rarefaction riccness of Epcemeroptera, Plecoptera, and Triccoptera assemblages between streams in botc forested and converted area. Tce upper and lower dasced lines indicate tce confidence intervals (95%) calculated for eacc category.
Fig. 1 in Association of Anagrus amazonensis Triapitsyn, Querino & Feitosa (Hymenoptera, Mymaridae) with aquatic insects in upland streams and floodplain lakes in central Amazonia, Brazil
Fig. 1. Sites where Anagrus amazonensis (Hymenoptera, Mymaridae), its hosts, and their associated plants were collected in Amazonas State, Brazil.
Figure 3 in Aquatic insects in the forest canopy: a new genus of moth flies (Diptera: Psychodidae) developing in slime on aerial roots
Figure 3. Habitus of Mucomyia emersa male, head and abdomen removed.
Figure 2 in Aquatic insects in the forest canopy: a new genus of moth flies (Diptera: Psychodidae) developing in slime on aerial roots
Figure 2. Habitus of Mucomyia emersa larvae in plant mucilage.
Ultraviolet polarized light pollution responses by aquatic insects
<p>This dataset contains data from a field-based experiment described in the paper: "Fraleigh, D., Barratt Heitman, J., Robertson, B.A. (2021) Ultraviolet polarized light pollution and evolutionary traps for aquatic insects. Animal Behaviour. October."</p> <p>The experiment investigates the ability of different families of aquatic insects to detect and move toward sources of ultraviolet polarized light. The experiment conducted adjacent to the Saw Kill River in Annandale-on-Hudson, NY and wild emergent aquatic insects were simultaneously exposed to five lighting treatments: 1) polarized visible wavelengths of light , 2) polarized visible and polarized ultraviolet light, 3) unpolarized visible light, 4) polarized ultraviolet light and unpolarized visible light, and 5) unpolarized visible and ultraviolet light. Insects attracted to a light source reflecting from a oil-filled tray would touch down upon the oil and become trapped. The main results of the experiments was that one family of aquatic insects seems to have the ability to see ultraviolet polarized light and use it as a nocturnal cue to the location of water bodies, while terrestrial insects showed no indication of responses to any type of polarized light. </p>
Fig. 2 in Aquatic insects as the main food resource of fish the community in a Neotropical reservoir
Fig. 2. Alimentary Index (%) of food categories consumed by the fish community of the Nova Avanhandava Reservoir. AI = Aquatic insect; TI = Terrestrial insects; CR = Crustaceans; FI = Fish; MA = Macroinvertebrates; MI = Microcrustaceans; AL = Algae; VM = Vegetal matter; DS = Detritus/sediment; SC = Scales. The acronyms of species are in Table 1.
Pervasive decline of subtropical aquatic insects over 20 years driven by water transparency, non-native fish and stoichiometric imbalance
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Data from:Microgeographic differentiation in thermal performance curves between rural and urban populations of an aquatic insect
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Ultraviolet polarized light pollution responses by aquatic insects
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Data from: Elevated temperatures translate into reduced dispersal abilities in a natural population of an aquatic insect
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Data from: Trait-environment relationships could alter the spatial and temporal characteristics of aquatic insect subsidies at the macrospatial scale
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Flow increases tolerance of heat and hypoxia of an aquatic insect
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Data from: Trematode parasites exceed aquatic insect biomass in Oregon stream food webs
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Data on heat tolerance of aquatic insects
<p>data on heat tolerance of various aquatic insects, measured under normoxia (20 kPa; 100% oxygen saturation).</p><p> </p>
Figure 1 in A preliminary study on the diversity of macrobenthic and aquatic insect fauna of Subhadra Estuary, Ganjam, Odisha
Figure 1. Sampling locations at Subhadra Estuary.
Figure 3 in A comparative study of the aquatic insect diversity of two ponds located in Cachar District, Assam, India
Figure 3. CCA biplot for UP.
Data from: Phylogenetic divergences of the true bugs (Insecta: Hemiptera: Heteroptera), with emphasis on the aquatic lineages: the last piece of the aquatic insect jigsaw originated in the Late Permian/Early Triassic
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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