Results 11 to 20 of about 308 (105)

Do atmospheric events explain the arrival of an invasive ladybird (Harmonia axyridis) in the UK? [PDF]

PLoS One, 2020
Species introduced outside their natural range threaten global biodiversity and despite greater awareness of invasive species risks at ports and airports, control measures in place only concern anthropogenic routes of dispersal.
Siljamo P, Ashbrook K, Comont RF, Skjøth CA.   +3 more
europepmc   +3 more sources

Contrasting patterns of macroptery in Roesel’s bush cricket Metrioptera roeselii (Orthoptera, Ensifera); pp. 299–311

Estonian Journal of Ecology, 2014
We studied the wing dimorphism in Roesel’s bush cricket populations. A total of 410 individuals (77 macropterous and 333 brachypterous) were sampled in seven sites. We found a high frequency (£ 53%) of macropterous individuals in some meadows surrounded by forests.
Szabolcs Szanyi, Antal Nagy, István A. Rácz, Zoltán Varga   +3 more
  +6 more sources

Identifying environmental factors affecting the production of pea aphid dispersal morphs in field populations

Ecological Entomology, Volume 48, Issue 5, Page 597-609, October 2023., 2023
In a three‐year study, we examined multiple environmental factors on winged morph production in pea aphid populations under field conditions. Pea aphid abundance, temperature, and host plant maturity together explained 67% of the variation in winged morph production. The other factors we investigated explained little variation.
Michael J. Bosch, Anthony R. Ives
wiley   +1 more source

On Variation of Polyandry in a Bush-Cricket,Metrioptera roeselii, in Northern Europe [PDF]

Journal of Insect Science, 2013
Patterns of polyandry in nuptial-gift-giving insects are often explained in terms of sexually antagonistic coevolution. However, the potential influence of environmental constraints and life-history traits on polyandry in these species is still largely unexplored. As an initial step in examining the role of these factors, this study measured the number
Kaňuch, Peter, Kiehl, Berrit, Low, Matthew, Cassel-Lundhagen, Anna   +3 more
openaire   +1 more source

Traditional grazing management creates heterogeneous swards and fosters grasshopper densities

Insect Science, Volume 29, Issue 6, Page 1805-1818, December 2022., 2022
Graphical Abstract Abstract Common pastures were once the dominant type of land use in many European regions. However, during the past 150 years, they have declined dramatically. Recent studies have shown that they are hotspots for rare plant, butterfly, and bird species in the study area, the Bavarian pre‐Alps (southern Germany).
Cinja Schwarz, Thomas Fartmann
wiley   +1 more source

Assessing grasshopper communities in mountainous meadows – a comparison of a visual‐acoustic and a novel, purely acoustic soundscape method

Entomologia Experimentalis et Applicata, Volume 170, Issue 10, Page 895-901, October 2022., 2022
Grasshoppers (Orthoptera, suborders Ensifera and Caelifera) are often collected as model organisms in ecological studies by using different methods. We tested the efficiency of two methods for assessing grasshopper species richness and assemblages on mountainous meadows in the Austrian Alps.
Ronnie Walcher, Raja Imran Hussain, Leopold Sachslehner, Johann G. Zaller, Arne Arnberger, Thomas Frank   +5 more
wiley   +1 more source

Summer drought affects abundance of grassland grasshoppers differently along an elevation gradient

Ecological Entomology, Volume 47, Issue 5, Page 778-790, October 2022., 2022
Summer temperature was the key driver of grasshopper abundance. Abundance was lowest in grasslands that were situated at lower elevations with higher summer temperatures and that were characterised by the strongest effects of summer drought. Suitable conservation strategies that increase the resistance and resilience of temperate semi‐natural ...
Thomas Fartmann, Jonas Brüggeshemke, Dominik Poniatowski, Franz Löffler   +3 more
wiley   +1 more source

Re‐surveys reveal biotic homogenization of Orthoptera assemblages as a consequence of environmental change

Diversity and Distributions, Volume 28, Issue 9, Page 1795-1809, September 2022., 2022
Abstract Aim Biodiversity loss is a major global challenge. While population trends of vertebrates are well documented, insect declines have not been sufficiently studied. We aim to identify changes in Orthoptera assemblages and the underlying drivers with a focus on land‐use and climate change. Location Central Europe.
Sophie Ogan, Christian Paulus, Christoph Froehlich, Carsten Renker, Claude Kolwelter, Marc Schendzielorz, Anja Danielczak, Katrin Müller, Hannah Eulering, Axel Hochkirch, José Brito   +10 more
wiley   +1 more source

Function of male genital titillators in mating and spermatophore transfer in the tettigoniid bushcricketMetrioptera roeselii [PDF]

Biological Journal of the Linnean Society, 2015
Males of certain bushcrickets (Orthoptera: Ensifera: Tettigoniidae) possess sclerotized internal genital devices termed titillators. These titillators are paired chitinized structures for which the function remains to be completely determined. We studied the role of the titillators during copulation in the bushcricket Metrioptera roeselii (Hagenbach ...
Nadja C. Wulff, Gerlind U. C. Lehmann
openaire   +1 more source

Experimental evidence for density-determined wing dimorphism in two bush-crickets (Ensifera: Tettigoniidae)

European Journal of Entomology, 2009
Macroptery is common in many species of Orthoptera, but the causes are still discussed. Besides the assumption that macroptery is genetically determined, there is evidence that wing dimorphism is induced by environmental factors, particularly population ...
Dominik PONIATOWSKI, Thomas FARTMANN
doaj   +1 more source