Thermal variability drives synchronicity of an aquatic insect resource pulse

Historical temperature reconstructions at high altitudes are still insufficient in southwestern China, which is considered one of the most sensitive areas to climate change in the world. Here we developed a tree ring-width chronology of Faxon fir Abies fargesii var. faxoniana at the upper timber line on Zhegu Mountain, Miyaluo Scenic Area, western Sichuan, China. The climate-tree growth relationship analysis indicated temperature as the dominant regulator on radial tree growth in this region. The reconstruction of aggregated maximum temperature (TMX) of autumn and winter for the period 1856-2016 was achieved with a linear regression model that accounted for 43.6% of the actual variability in the common time series (1954-2016). The reconstruction identified 4 warm periods and 3 cold periods. Similarities of warm and cold periods with previously published reconstructions from nearby sites indicated the reliability of our reconstruction. The significant positive correlation between TMX reconstruction and the Asian-Pacific Oscillation index and the Atlantic Multi-decadal Oscillation index suggested a linkage between large-scale climate circulations and the thermal variability at a multi-decadal scale on the western Sichuan Plateau. We also found that solar activity exerted a strong influence on decadal temperature variability in this region. The cold periods were matched well with historical large volcanic eruptions. Our results strengthen the historical climatic information in southwestern China and contribute to further understanding the regional thermal variability as well as its driving mechanism.

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Aquatic insect larvae are major players in mediating lakes' carbon-sequestering capacities in the warming world

10.1603/ice.2016.110362 ◽

2016 ◽

Author(s):

Viktor A. Baranov

Keyword(s):

Aquatic Insect ◽

Insect Larvae ◽

Carbon Sequestering ◽

Warming World ◽

Aquatic Insect Larvae

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Preliminary Results on Aquatic Insects in the Me Linh Station for Biodiversity, Vinh Phuc Province

VNU Journal of Science Natural Sciences and Technology ◽

10.25073/2588-1140/vnunst.4696 ◽

2017 ◽

Vol 33 (4) ◽

Author(s):

Nguyen Van Hieu ◽

Nguyen Van Vinh

Keyword(s):

Quantitative Analysis ◽

Aquatic Insects ◽

Field Survey ◽

Aquatic Insect ◽

Insect Species ◽

Functional Feeding Groups ◽

Species Number ◽

Feeding Groups ◽

Preliminary Results

An intensive field survey on aquatic insects of Me Linh Station for Biodiversity in Vinhphuc province was conducted in December 2015. Specimens were collected at 8 different sites and aquatic insects were collected both quantitatively by Surber net and qualitatively by hand net, pond net. As a result, a total of 110 aquatic insect species belonging to 98 genera, 49 families and 9 orders were recognized. Among these, the order Ephemeroptera had the highest species number with 26 species, followed by Odonata with 25 species, Trichoptera with 18 species, Coleoptera with 15 species, Hemiptera with 11 species, Diptera with 9 species. Lepidoptera, Plecoptera and Megaloptera had the lowest of species number, represented by 3 species of Lepidoptera, 2 species of Plecoptera and 1 species of Megaloptera. Besides, the quantitative analysis results and the functional feeding groups were provided.

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New Data on the Aquatic Insect Fauna of Tunisia

Transactions of the American Entomological Society ◽

10.3157/061.144.0309 ◽

2018 ◽

Vol 144 (3) ◽

pp. 575

Author(s):

Nard Bennas ◽

Ouassima L'Mohdi ◽

Mohamed El Haissoufi ◽

Faouzia Charfi ◽

Adnen Ghlala ◽

...

Keyword(s):

Aquatic Insect ◽

Insect Fauna ◽

Aquatic Insect Fauna

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Faculty Opinions recommendation of Nonnative trout impact an alpine-nesting bird by altering aquatic-insect subsidies.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.11944959.13068058 ◽

2011 ◽

Author(s):

Mark Hay

Keyword(s):

Aquatic Insect

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Do carabids (Coleoptera: Carabidae) and chironomids (Diptera: Chironomidae) exhibit similar diversity and distributional patterns along a spatio-temporal gradient on a glacier foreland?

Journal of Limnology ◽

10.4081/jlimnol.2018.1794 ◽

2018 ◽

Author(s):

Mauro Gobbi ◽

Valeria Lencioni

Keyword(s):

Species Richness ◽

Species Turnover ◽

Aquatic Insect ◽

Taxonomic Diversity ◽

Carabid Beetles ◽

Species Assemblages ◽

Glacier Foreland ◽

Distributional Patterns ◽

Glacier Front ◽

Spatio Temporal

Carabid beetles and chironomid midges are two dominant cold-adapted taxa, respectively on glacier forefiel terrains and in glacial-stream rivers. Although their sensitivity to high altitude climate warming is well known, no studies compare the species assemblages exhibited in glacial systems. Our study compares diversity and distributional patterns of carabids and chironomids in the foreland of the receding Amola glacier in central-eastern Italian Alps. Carabids were sampled by pitfall traps; chironomids by kick sampling in sites located at the same distance from the glacier as the terrestrial ones. The distance from the glacier front was considered as a proxy for time since deglaciation since these variables are positively correlated. We tested if the distance from the glacier front affects: i) the species richness; ii) taxonomic diversity; and iii) species turnover. Carabid species richness and taxonomic diversity increased positively from recently deglaciated sites (those c. 160 m from the glacier front) to sites deglaciated more than 160yrs ago (those located >1300 m from glacier front). Species distributions along the glacier foreland were characterized by mutually exclusive species. Conversely, no pattern in chironomid species richness and turnover was observed. Interestingly, taxonomic diversity increased significantly: closely related species were found near the glacier front, while the most taxonomically diverse species assemblages were found distant from the glacier front. Increasing glacial retreat differently affect epigeic and aquatic insect taxa: carabids respond faster to glacier retreat than do chironomids, at least in species richness and species turnover patterns.

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