02540nas a2200253   4500008004100000245006800041210006800109300001200177520185000189653001302039653001502052653001602067653001402083653001802097653001602115653001102131653003002142653001702172653000902189653002502198100001602223700001302239856003402252       2002                        eng d00aEffects of forest fragmentation on the activity of dung beetles0 aEffects of forest fragmentation on the activity of dung beetles  a165-1793 aThe effect of seed burial by dung beetles on seed survival and seedling establishment in Tetragastris altissima (Burseraceae) was measured on 3 sites of continuous forest and 7 islands in the man-inundated rain forest of Saint-Eugene, French Guiana. Experiments using a total of 250 seeds were performed using wire enclosures open to dung beetles but excluding terrestrial seed predators. Fragmentation had no effect on the rate of dung disappearance at 12, 24 and 48 h because there was a high variability between sites. On average, 24 % of seeds were buried by dung beetles after 72 h, Overall, there was no effect of fragmentation due to variation between sites. Dung burial rates were positively correlated with rarefaction of the dung beetle samples collected on the different sites. They were also positively correlated with weighted abundances of large diurnal tunnellers after 12 h and to total tunnellers after 24 h. Seed burial was positively correlated to weighted abundance of large nocturnal tunnellers and of total tunnellers. The species diversity and abundance were positively related to area that did not involve a correlation between seed burial rates and area. After 72 h, survival rate of protected seeds at ground surface was significantly larger (78 %) than for non protected seeds (22 %), which were attacked by rodents. There was no difference between continuous forest and islands. Eight percent of buried seeds emerged, i.e. 2 % of all seeds deposited. Burial depth significantly affected the rate of emergence of buried seeds. Ninety percent of seeds at surface germinated versus 0 % at 10 and 15 cm. The effects of seed burial by dung beetles on early recruitment of T altissima was low and highly variable between sites in relation with the structure of the community of Scarabaeidae and intensity of seed predation.10aAmazonia10aCOLEOPTERA10acommunities10adispersal10afrench-guiana10alos-tuxtlas10aMexico10amonkeys alouatta-palliata10aScarabaeidae10aseed10atropical rain-forest1 aHingrat, Y.1 aFeer, F.  u<Go to ISI>://00017928480001100593nas a2200133   4500008004100000245013800041210006900179300001200248490001500260653001700275100001600292700001300308856013800321       2002                        eng d00aEffets de la fragmentation forestiere sur l'activite des coleopteres corrophages: disperson secondaire des graine en Guyane Franciase0 aEffets de la fragmentation forestiere sur lactivite des coleopte  a165-1790 vSupplement10aDung beetles1 aHingrat, Y.1 aFeer, F.  uhttps://scarabnet.myspecies.info/effets-de-la-fragmentation-forestiere-sur-lactivite-des-coleopteres-corrophages-disperson-secondaire