DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2010 str. 41 <-- 41 --> PDF |
L. Šerić Jelaska,A. Ješovnik, S. D. Jelaska,A. Pirnat, M. Kučinić, P. Durbešić: VARIATIONS OF CARABID ... Šumarski list br. 9–10, CXXXIV (2010), 475-486 Carabid Beetles andAnts Sampling – Uzorkovanje trčaka i mrava Carabid beetles and ants were collected in 16 pitfall traps on each plot, placed in a regular rectangular net with cell size of 10 x 10 meters placed five meters from the edges of the plot.Altogether, 96 pitfall traps were exposed through the investigation period.Traps were filled with ethanol (96%), acetic acid (9%) and water in equal proportions and emptied every two to three weeks from March 2001 toApril 2002. Carabids and ants were identified using specialized keys (Collingwood 1979, Agosti and Collingwood 1987, Trautner and Data Analyses – The total abundance and species richness of ants and carabids was determined for each habitat (i.e. plot).The Shannon-Wiener and Sorensen indices (Krebs 1989) were calculated for all plots to assess ground beetles and ants’diversity and similarity using Programs for Ecological methodologyVer.5.2 (15-III. 2000). Sorensen similarity values between plots were used in cluster analyses with the Euclidean distance as distance measure and single linkage as linkage rule for constructing RESULTS Atotal of 9288 beetles and 2958 ants belonging to 43 and 20 species, respectively, were trapped (Table 3). The number of captured species per plot varied from 17 to 27 for carabids, and from 5 to 14 for ants.Abax parallelepipedus, Abax paralellus, Aptinus bombarda,Carabus violaceusandCychrus attenuatuswere carabids found at all surveyed plots (Table 3). Only one ant species Myr- Geigenmüller 1987,Hůrka 1996,Freude et al. 2004 andSeifert 2007). AccordingtoAndersen et al. (2002) ants were classified in four functional groups. Based on personal measurements of carabid specimens and data from Hůrka (1996) and Freude et al. (2004), average body size for analyzed species were classified into three categories: (1) small (4–8 mm); (2) medium (8–21 mm); and (3) large (22–40 mm) using a size distribution graph. Analiza podataka dendrograms using STATISTICA 6.1 (StatSoft Inc. 2003).Wecompare habitat complexity scores, plant species richness and measured environmental variables (soil organic matter, slope, aspect and elevation) with data about richness and abundance of ants and carabids, ant functional groups and carabids body size distribution patches using Pearson Product Moment correlations in STATISTICA6.1 software. – Rezultati mica ruginodiswas found at all plots, unlikeCrematogaster schmidti,Camponotus herculeanus,Formica gagatesandFormica rufarecorded at single plot (Table 3). Ant species richness was negatively associated with carabid richness per plot (r = -0.86;p= 0.029), opposite to the trend for their abundance (r = 0.85; p=0.031). Table 3 Carabid and ant species with number of specimens per plot. Plot number corresponds to those in Figure 1 Tablica 3.Vrste i brojnost jedinki trčaka (Carabid) i mrava (Ant) na istraživanim plohama. Broj plohe odgovara onome na slici 1. Carabid species/Plots 1 2 3 4 5 6 Abax carinatus(Duftschmid 1812) 156 23 2 1 26 Abax ovalis(Duftschmid 1812) 1 3 37 1 Abax parallelepipedus(Piller & Mitterpacher 1783) 654 89 328 5 61 50 Abax parallelus(Duftschmid 1812) 498 2 283 1 145 136 Agonum gracilipes(Duftschmid 1812 1 Platynus scrobiculatus(Fabricius 1801) 1 19 Amara aeneaDe Geer 1774 3 2 1 1 Aptinus bombarda (Illiger 1800) 1108 4 11 3 213 45 Bembidion lampros (Herbst 1784) 1 Bembidion deletumAudinet-Serville 1821 1 Carabus convexusFabricius 1775 445 343 362 1 Carabus coriaceusL. 1758 34 23 82 2 10 Carabus gigasCreutzer 1799 16 5 1 Carabus intricatusL. 1761 132 49 78 1 3 Carabus irregularis Fabricius 1792 72 85 12 Carabus nemoralisO. F.Müller 1764 636 379 52 15 6 Carabus praecellensPalliardi 1825 18 3 2 24 35 Carabus ulrichiiGermar 1824 548 29 100 52 8 Carabus violaceusL. 1758 23 168 43 29 35 63 |