• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Rekreacijos įtaka miško paklotės entomofaunai pušynuose / Impact of recreation on litter arthropods in pine forest

Žilinskas, Kęstutis 06 June 2005 (has links)
The research object. The research was made in the territory of Neris regional park (Kaisiadoriu forest enterprise, Vievis forest district) in order to evaluate the impact of recreational activities on the forest litter arthropods. The aim of the study – to evaluate different recreational digression stage impact on pinery litter arthropods: their amount and seasonal dynamics, distribution trophic groups, the abundance and variety of species in stands affected by recreation. Methods. Arthropods were collected in Barber ground traps from April through October 2005, which are plastic, 150 ml. volume, with 6.5 cm diameter receptacle. They were dug in the ground and 1/3 of trap was filled with 10 % formalin liquor, which protected insects from decaying and insectivorous birds. Ground traps in each sample plot were spread in groups by 4 (square), the distance between them was 2 m. The distance between sample plots was 20-50 meters. The results. 157 species were identified in trap catches: 96 in the control plot, 97 in the plot with low recreational damage and 110 in the plot wit high recreational damage. Entomophagous predominated and made 60-73 %, kaprophagous 8-25%, saprophagous 10% of catch. 2 extremely rare species and 7 rare species in Lithuania were found, the biggest number of rare species was found in the plot with high recreational damage. Shannon diversity index H’ was 2.5-3.31, evenness E – 0.55-0.66, Berger-Parker dominance d – 0.170-0.367. Sorensen similarity index Cs... [to full text]

Page generated in 0.0706 seconds