35 research outputs found
Demography of some non-native isopods (Crustacea, Isopoda, Oniscidea) in a Mid-Atlantic forest, USA
Introduced species dominate the terrestrial isopod fauna in most inland habitats of North America, including urban landscapes. These non-native species are often very abundant and thus potentially play a significant role in detritus processing. We monitored isopod assemblages in an urban forest for a year to examine the relationship between surface activity and abiotic environmental factors, and to analyze reproductive characteristics that might contribute to their successful establishment. Using pitfall trap samples we recorded five species, two of which, Trachelipus rathkii and Cylisticus convexus, were highly abundant. We determined size, sex and reproductive state of each individual. Surface activity of both species reflected variability in abiotic stress factors for isopods, such as soil moisture and soil temperature. Early spring the main trigger was soil temperature while later in the season increasing temperature and decreasing soil moisture jointly affected population dynamics. Activity significantly correlated with soil moisture. The temporal pattern of sex ratios supported the secondary sex ratio hypothesis. Males dominated the samples on the onset of the mating season in search of females. The pattern was reversed as females searched for suitable microsites for their offspring. Size independent fecundity decreased as conditions became more stressful late in the season
New Method for Automatic Body Length Measurement of the Collembolan, Folsomia candida Willem 1902 (Insecta: Collembola)
A sikeres megtelepedés ökológiai håttere = The ecological background of successful establishment
VizsgĂĄltuk epigeikus taxonok megtelepedĂ©sĂ©ben terjedĂ©sĂ©ben, invazĂvvĂĄ vĂĄlĂĄsĂĄban szerepet jĂĄtszhatĂł ökolĂłgiai hĂĄttĂ©rtĂ©nyezĆk Ă©s a fajok Ă©letmenet jellemzĆi közti összefĂŒggĂ©seket. MegĂĄllapĂtottuk egyes fajok szĂĄrazsĂĄg tƱrĂ©sĂ©t (Collembola, Isopoda); szaporodĂĄsi stratĂ©giĂĄjĂĄt (Oligochaeta, Isopoda); a nĆstĂ©ny mĂ©ret-reproduktĂv siker ĂĄltalĂĄnosĂthatĂł összefĂŒggĂ©sĂ©t; kategorizĂĄltuk a magyarorszĂĄgi IsopodĂĄkat elterjedĂ©sĂŒk, habitat igĂ©nyĂŒk alapjĂĄn. Ez lehetĆvĂ© teszi Ă©lĆhelyek termĂ©szetessĂ©gi minĆsĂtĂ©sĂ©t; ehhez adatlapot kĂ©szĂtettĂŒnk, szĂĄmĂtĂłgĂ©pes adatbĂĄzist Ă©pĂtettĂŒnk; igazoltuk a meghonosodott fajokat antropogĂ©n zavarĂĄs alatt ĂĄllĂł terĂŒleteken. Ăj, behurcolt Ă©s megtelepedett fajokat mutattunk ki (Baltimore, Budapest; Oligochaeta, Isopoda); megĂĄlapĂtottuk, hogy termĂ©szetközeli-urbĂĄn grĂĄdiens mentĂ©n taxonjaink nem a diverzitĂĄs, hanem a fajegyĂŒttesek minĆsĂ©gi összetĂ©telĂ©nek Ă©s a fajok abundancia mintĂĄzatĂĄnak eltĂ©rĂ©sĂ©vel vĂĄlaszolnak (Carabidae, Isopoda); kidolgoztuk a stresszhatĂĄsok morfolĂłgiai alapokon törtĂ©nĆ mĂ©rĂ©sĂ©t a fluktuĂĄlĂł aszimmetria (FA) mĂłdszerĂ©vel (Isopoda); igazoltuk a sikeres fajok földrajzilag szĂ©les elterjedĂ©sĂ©t, több Ă©lĆhely tĂpusban Ă©s szĂ©lesebb mikrohabitat skĂĄlĂĄn valĂł megjelenĂ©sĂ©t (Isopoda);Gastropoda elterjedĂ©si adatok hĂĄrom kĂŒlönbözĆ tĂ©rbeli lĂ©ptĂ©kƱ elemzĂ©sĂ©vel megĂĄllapĂtottuk a fajok gyakorisĂĄgĂĄĂ©rt felelĆs tĂ©nyezĆket, a lĂ©trejött mintĂĄzatok termĂ©szetvĂ©delmi konzekvenciĂĄit. Kimutattuk a testmĂ©ret fontos szerepĂ©t azok terjedĆ kĂ©pessĂ©gĂ©ben, a terjedĂ©s mĂłdjĂĄban. | Our investigations were targeted towards the relationship between ecological attributes of epigeic taxa playing key role in their dispersal and establishment, and their life history parameters. We determined drought tolerance (Collembola, Isopoda) and reproductive strategy (Oligochaeta, Isopoda) of species; the general relationship between female body size and reproductive success; and we categorised Hungarian isopod species based on their distribution and habitat requirements. This can lead to the assessment of habitat naturalness; to this we have compiled a data sheet, built a database; we proved naturalized species in disturbed anthropogenic habitats. We found new, introduced, and established species (Baltimore, Budapest; Oligochaeta, Isopoda); we showed that along an urban-rural gradient, our taxa respond not via richness, but species composition and abundance patterns (Carabidae, Isopoda); we developed methodology to measure environmental stress through morphology and fluctuating asymmetry (FA; Isopoda); we proved that successful species are geographically widespread and can be found in wider range of habitats and micro-habitats. We studied the correlates of commonness of Gastropoda species, and its nature conservation consequences. We demonstrated the significance of body size in determining dispersal potential and mode of dispersal
Investigation of insect attraction effect of lamps with different color temperatures = KĂŒlönbözĆ szĂnhĆmĂ©rsĂ©kletƱ lĂĄmpĂĄk rovarvonzĂł hatĂĄsĂĄnak vizsgĂĄlata
The aim of our research is to analyze the ecological effects of light sources of different colors. Quantity and size of arthropods captured by light traps are continuously recorded by the Zoolog auto sampler, along with temperature and humidity data. By statistically analyzing large amounts of data, it is possible to estimate the amount of biomass removed by different types of lamps from their habitat, to monitor daily and longer-term activity changes, and to analyze the attractiveness of LEDs of different color temperatures. This will also allow conclusions to be drawn for conservation management. ----- KĂLĂNBĂZĆ SZĂNHĆMĂRSĂKLETĆ° LĂMPĂK ROVARVONZĂ HATĂSĂNAK VIZSGĂLATA KutatĂĄsunk cĂ©lja a kĂŒlönbözĆ szĂnhĆmĂ©rsĂ©kletƱ fĂ©nyforrĂĄsok ökolĂłgiai hatĂĄsĂĄnak elemzĂ©se. A fĂ©nycsapdĂĄk ĂĄltal bevonzott ĂzeltlĂĄbĂșak mennyisĂ©gi Ă©s mĂ©retadatait a Zoolog automatikus mintavevĆ folyamatosan rögzĂti, egyĂŒtt a hĆmĂ©rsĂ©klet- Ă©s pĂĄratartalom-adatokkal. Ăgy nagy mennyisĂ©gƱ adat statisztikai elemzĂ©sĂ©vel lehetĆsĂ©g nyĂlik a kĂŒlönbözĆ tĂpusĂș lĂĄmpĂĄk ĂĄltal Ă©lĆhelyĂŒkrĆl kivonzott biomassza mennyisĂ©gĂ©nek becslĂ©sĂ©re, illetve a napi Ă©s hosszabb tĂĄvĂș aktivitĂĄsvĂĄltozĂĄsok nyomon követĂ©sĂ©re Ă©s a kĂŒlönbözĆ szĂnhĆmĂ©rsĂ©kletƱ LED-ek attraktivitĂĄsĂĄnak elemzĂ©sĂ©re. Ez lehetĆvĂ© teszi a termĂ©szetvĂ©delmi kezelĂ©st elĆsegĂtĆ következtetĂ©sek levonĂĄsĂĄt is
Investigation of insect attraction effect of lamps with different color temperatures
The aim of our research is to analyze the ecological effects of light sources of
different colors. Quantity and size of arthropods captured by light traps are
continuously recorded by the Zoolog auto sampler, along with temperature and
humidity data. By statistically analyzing large amounts of data, it is possible to
estimate the amount of biomass removed by different types of lamps from
their habitat, to monitor daily and longer-term activity changes, and to analyze
the attractiveness of LEDs of different color temperatures. This will also allow
conclusions to be drawn for conservation management. ----- KĂLĂNBĂZĆ SZĂNHĆMĂRSĂKLETĆ° LĂMPĂK ROVARVONZĂ
HATĂSĂNAK
VIZSGĂLATA KutatĂĄsunk cĂ©lja a kĂŒlönbözĆ szĂnhĆmĂ©rsĂ©kletƱ fĂ©nyforrĂĄsok ökolĂłgiai hatĂĄsĂĄnak
elemzĂ©se. A fĂ©nycsapdĂĄk ĂĄltal bevonzott ĂzeltlĂĄbĂșak mennyisĂ©gi Ă©s
mĂ©retadatait a Zoolog automatikus mintavevĆ folyamatosan rögzĂti, egyĂŒtt a
hĆmĂ©rsĂ©klet- Ă©s pĂĄratartalom-adatokkal. Ăgy nagy mennyisĂ©gƱ adat statisztikai
elemzĂ©sĂ©vel lehetĆsĂ©g nyĂlik a kĂŒlönbözĆ tĂpusĂș lĂĄmpĂĄk ĂĄltal Ă©lĆhelyĂŒkrĆl
kivonzott biomassza mennyiségének becslésére, illetve a napi és hosszabb
tĂĄvĂș aktivitĂĄsvĂĄltozĂĄsok nyomon követĂ©sĂ©re Ă©s a kĂŒlönbözĆ szĂnhĆmĂ©rsĂ©kletƱ
LED-ek attraktivitĂĄsĂĄnak elemzĂ©sĂ©re. Ez lehetĆvĂ© teszi a termĂ©szetvĂ©delmi
kezelĂ©st elĆsegĂtĆ következtetĂ©sek levonĂĄsĂĄt is