Search results for "maakiitäjäiset"

Species co-occurrence networks of ground beetles in managed grasslands

2020

AbstractGrassland biodiversity, including traditional rural biotopes maintained by traditional agricultural practices, has become threatened worldwide. Road verges have been suggested to be complementary or compensatory habitats for species inhabiting grasslands. Species co-occurrence patterns linked with species traits can be used to separate between the different mechanisms (stochasticity, environmental filtering, biotic interactions) behind community structure. Here, we study species co-occurrence networks and underlying mechanisms of ground beetle species (Carabidae) in three different managed grassland types (meadows, pastures, road verges, n = 12 in each type) in Central Finland. We a…

Kaupunkimetsien raivauksen ekologiset vaikutukset

2010

Effects of undergrowth removal and edge proximity on ground beetles and vascular plants in urban boreal forests

2019

Urban forests are regularly managed for human safety and esthetic reasons, but they are crucial habitat for many species. Removals of undergrowth occur commonly in these forests, yet the ecological consequences of these operations are poorly understood. We sampled ground beetles (Coleoptera, Carabidae) and vascular plants along 20-m edge gradients in Finnish urban forests, in five stands treated 0.5–2.5 years earlier with undergrowth removal and in five untreated stands. We hypothesized that undergrowth removal and edge proximity would benefit opportunistic and open-habitat species, whereas shady-habitat species would be affected negatively. (1) Regarding carabids, diversity and evenness in…

Exploratory behaviour is not related to associative learning ability in the carabid beetle Nebria brevicollis

2020

Recently, it has been hypothesised that as learning performance and animal personality vary along a common axis of fast and slow types, natural selection may act on both in parallel leading to a correlation between learning and personality traits. We examined the relationship between risk-taking and exploratory behaviour and associative learning ability in carabid beetle Nebria brevicollis females by quantifying the number of trials individuals required to reach criterion during an associative learning task (‘learning performance’). The associative learning task required the females to associate odour and direction with refugia from light and heat in a T-maze. Further, we assessed learning …

Boreaalisen metsän ennallistamistoimien vaikutukset maakiitäjäisiin (Coleoptera, Carabidae)

2012

Ennallistamisen tavoitteena on nopeuttaa talousmetsäkäytössä olleen boreaalisen metsän palautumista rakenteeltaan, toiminnaltaan ja eliöstöltään luonnontilaisen kaltaiseksi. Ennallistamistoimilla, kuten lahopuun määrän lisäämisellä tai kulotuksella, pyritään jäljittelemään metsän luontaisia häiriöitä, kuten tuulenkaatoja tai metsäpaloja. Intensiivisen metsänhoidon piirissä olevaan tasaikäiseen ja vähälajiseen metsään ihmisavusteinen häiriö, kuten lahopuun lisääminen ja/tai kulotus, luo monimuotoisempaa rakennetta ja uutta kasvutilaa. Tämän tutkimuksen tavoitteena oli testata maakiitäjäisten vasteita ennallistamistoimiin, kun ennallistamisesta oli kulunut seitsemän vuotta eli hieman pidempi …

Habitat area and local habitat conditions outweigh fragmentation effects on insect communities in vineyards

2022

Fragmentation of habitat, for example by intensive agricultural practices, can be detrimental to local biodiversity. However, it often remains unclear whether such biodiversity declines are caused by loss of habitat area or increased fragmentation, and how habitat quality factors into it. In our study system, vegetated vineyards are typically small, and isolated from one another, potentially limiting the distribution and dispersal of organisms. In a full-factorial experiment of a priori selected vegetated vineyard patches of differing size and fragmentation, we aimed to disentangle the effects of habitat area (area of vegetated vineyards), habitat fragmentation (number of vegetated vineyard…