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Mengel L, Linhart S, Haug GT, Weiterschan T, Müller P, Hoffeins C, Hoffeins HW, Baranov V, Haug C, Haug JT. The Morphological Diversity of Dragon Lacewing Larvae (Nevrorthidae, Neuroptera) Changed More over Geological Time Scales Than Anticipated. INSECTS 2023; 14:749. [PMID: 37754717 PMCID: PMC10649721 DOI: 10.3390/insects14090749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/22/2023] [Accepted: 08/29/2023] [Indexed: 09/28/2023]
Abstract
Nevrorthidae, the group of dragon lacewings, has often been considered a relic group. Today, dragon lacewings show a scattered distribution, with some species occurring in southern Europe, Japan, Australia, and one in China. The idea that this distribution is only a remnant of an originally larger distribution is further supported by fossils of the group preserved in ambers from the Baltic region (Eocene, ca. 35-40 MaBP) and Myanmar (Kachin amber, Cretaceous, ca. 100 MaBP). Larvae of the group are slender and elongated and live mostly in water. Yet, larvae are in fact very rare. So far, only slightly more than 30 larval specimens, counting all extant and fossil larvae, have been depicted in the literature. Here, we report numerous additional specimens, including extant larvae, but also fossil ones from Baltic and Kachin amber. Together with the already known ones, this sums up to over 100 specimens. We analysed quantitative aspects of the morphology of these larvae and compared them over time to identify changes in the diversity. Despite the enriched sample size, the data set is still unbalanced, with, for example, newly hatched larvae (several dozen specimens) only known from the Eocene. We expected little change in larval morphology over geological time, as indicated by earlier studies. However, on the contrary, we recognised morphologies present in fossils that are now extinct. This result is similar to those for other groups of lacewings which have a relic distribution today, as these have also suffered a loss in diversity in larval forms.
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Affiliation(s)
- Laura Mengel
- Faculty of Biology, Biocenter, Ludwig-Maximilians-Universität München (LMU Munich), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany; (L.M.); (S.L.); (G.T.H.); (J.T.H.)
| | - Simon Linhart
- Faculty of Biology, Biocenter, Ludwig-Maximilians-Universität München (LMU Munich), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany; (L.M.); (S.L.); (G.T.H.); (J.T.H.)
| | - Gideon T. Haug
- Faculty of Biology, Biocenter, Ludwig-Maximilians-Universität München (LMU Munich), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany; (L.M.); (S.L.); (G.T.H.); (J.T.H.)
| | | | | | | | | | - Viktor Baranov
- Estación Biológica de Doñana-CSIC, 41092 Sevilla, Spain;
| | - Carolin Haug
- Faculty of Biology, Biocenter, Ludwig-Maximilians-Universität München (LMU Munich), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany; (L.M.); (S.L.); (G.T.H.); (J.T.H.)
- GeoBio-Center at LMU, Richard-Wagner-Str. 10, 80333 München, Germany
| | - Joachim T. Haug
- Faculty of Biology, Biocenter, Ludwig-Maximilians-Universität München (LMU Munich), Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany; (L.M.); (S.L.); (G.T.H.); (J.T.H.)
- GeoBio-Center at LMU, Richard-Wagner-Str. 10, 80333 München, Germany
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McCulloch GA, Waters JM. Rapid adaptation in a fast-changing world: Emerging insights from insect genomics. GLOBAL CHANGE BIOLOGY 2023; 29:943-954. [PMID: 36333958 PMCID: PMC10100130 DOI: 10.1111/gcb.16512] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 10/07/2022] [Indexed: 05/31/2023]
Abstract
Many researchers have questioned the ability of biota to adapt to rapid anthropogenic environmental shifts. Here, we synthesize emerging genomic evidence for rapid insect evolution in response to human pressure. These new data reveal diverse genomic mechanisms (single locus, polygenic, structural shifts; introgression) underpinning rapid adaptive responses to a variety of anthropogenic selective pressures. While the effects of some human impacts (e.g. pollution; pesticides) have been previously documented, here we highlight startling new evidence for rapid evolutionary responses to additional anthropogenic processes such as deforestation. These recent findings indicate that diverse insect assemblages can indeed respond dynamically to major anthropogenic evolutionary challenges. Our synthesis also emphasizes the critical roles of genomic architecture, standing variation and gene flow in maintaining future adaptive potential. Broadly, it is clear that genomic approaches are essential for predicting, monitoring and responding to ongoing anthropogenic biodiversity shifts in a fast-changing world.
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Neff F, Korner-Nievergelt F, Rey E, Albrecht M, Bollmann K, Cahenzli F, Chittaro Y, Gossner MM, Martínez-Núñez C, Meier ES, Monnerat C, Moretti M, Roth T, Herzog F, Knop E. Different roles of concurring climate and regional land-use changes in past 40 years' insect trends. Nat Commun 2022; 13:7611. [PMID: 36509742 PMCID: PMC9744861 DOI: 10.1038/s41467-022-35223-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/23/2022] [Indexed: 12/14/2022] Open
Abstract
Climate and land-use changes are main drivers of insect declines, but their combined effects have not yet been quantified over large spatiotemporal scales. We analysed changes in the distribution (mean occupancy of squares) of 390 insect species (butterflies, grasshoppers, dragonflies), using 1.45 million records from across bioclimatic gradients of Switzerland between 1980 and 2020. We found no overall decline, but strong increases and decreases in the distributions of different species. For species that showed strongest increases (25% quantile), the average proportion of occupied squares increased in 40 years by 0.128 (95% credible interval: 0.123-0.132), which equals an average increase in mean occupancy of 71.3% (95% CI: 67.4-75.1%) relative to their 40-year mean occupancy. For species that showed strongest declines (25% quantile), the average proportion decreased by 0.0660 (95% CI: 0.0613-0.0709), equalling an average decrease in mean occupancy of 58.3% (95% CI: 52.2-64.4%). Decreases were strongest for narrow-ranged, specialised, and cold-adapted species. Short-term distribution changes were associated to both climate changes and regional land-use changes. Moreover, interactive effects between climate and regional land-use changes confirm that the various drivers of global change can have even greater impacts on biodiversity in combination than alone. In contrast, 40-year distribution changes were not clearly related to regional land-use changes, potentially reflecting mixed changes in local land use after 1980. Climate warming however was strongly linked to 40-year changes, indicating its key role in driving insect trends of temperate regions in recent decades.
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Affiliation(s)
- Felix Neff
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Fränzi Korner-Nievergelt
- grid.419767.a0000 0001 1512 3677Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - Emmanuel Rey
- info fauna, Avenue de Bellevaux 51, 2000 Neuchâtel, Switzerland
| | - Matthias Albrecht
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Kurt Bollmann
- grid.419754.a0000 0001 2259 5533Biodiversity and Conservation Biology, Swiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Fabian Cahenzli
- grid.424520.50000 0004 0511 762XDepartment of Crop Sciences, Research Institute of Organic Agriculture FiBL, Ackerstrasse 113, 5070 Frick, Switzerland
| | | | - Martin M. Gossner
- grid.419754.a0000 0001 2259 5533Forest Entomology, Swiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland ,grid.5801.c0000 0001 2156 2780Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, ETH Zurich, Universitätstrasse 16, 8092 Zürich, Switzerland
| | - Carlos Martínez-Núñez
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Eliane S. Meier
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | | | - Marco Moretti
- grid.419754.a0000 0001 2259 5533Biodiversity and Conservation Biology, Swiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Tobias Roth
- grid.6612.30000 0004 1937 0642Department of Environmental Sciences, Zoology, University of Basel, Vesalgasse 1, 4051 Basel, Switzerland ,Hintermann & Weber AG, Austrasse 2a, 4153 Reinach, Switzerland
| | - Felix Herzog
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Eva Knop
- grid.417771.30000 0004 4681 910XAgroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland ,grid.7400.30000 0004 1937 0650Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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van Klink R, Bowler DE, Gongalsky KB, Chase JM. Long-term abundance trends of insect taxa are only weakly correlated. Biol Lett 2022; 18:20210554. [PMID: 35193369 PMCID: PMC8864342 DOI: 10.1098/rsbl.2021.0554] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/31/2022] [Indexed: 11/12/2022] Open
Abstract
Changes in the abundances of animals, such as with the ongoing concern about insect declines, are often assumed to be general across taxa. However, this assumption is largely untested. Here, we used a database of assemblage-wide long-term insect and arachnid monitoring to compare abundance trends among co-occurring pairs of taxa. We show that 60% of co-occurring taxa qualitatively showed long-term trends in the same direction-either both increasing or both decreasing. However, in terms of magnitude, temporal trends were only weakly correlated (mean freshwater r = 0.05 (±0.03), mean terrestrial r = 0.12 (±0.09)). The strongest correlation was between trends of beetles and those of moths/butterflies (r = 0.26). Overall, even though there is some support for directional similarity in temporal trends, we find that changes in the abundance of one taxon provide little information on the changes of other taxa. No clear candidate for umbrella or indicator taxa emerged from our analysis. We conclude that obtaining a better picture of changes in insect abundances will require monitoring of multiple taxa, which remains uncommon, especially in the terrestrial realm.
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Affiliation(s)
- Roel van Klink
- German Centre for Integrative Biodiversity research – iDiv - Halle-Jena-Leipzig, Puschstrasse 4, 04103 Leipzig, Germany
- Department of Computer Science, Martin Luther University-Halle Wittenberg, 06099 Halle (Saale), Germany
| | - Diana E. Bowler
- German Centre for Integrative Biodiversity research – iDiv - Halle-Jena-Leipzig, Puschstrasse 4, 04103 Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, Dornburger Str. 159, 07743 Jena, Germany
- Helmholtz - Centre for Environmental Research – UFZ, Permoserstraße 15, 04318 Leipzig, Germany
| | - Konstantin B. Gongalsky
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr., 33, Moscow 119071, Russia
| | - Jonathan M. Chase
- German Centre for Integrative Biodiversity research – iDiv - Halle-Jena-Leipzig, Puschstrasse 4, 04103 Leipzig, Germany
- Department of Computer Science, Martin Luther University-Halle Wittenberg, 06099 Halle (Saale), Germany
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