02121nas a2200217   4500008004100000020001400041245013500055210006900190260004000259300001200299490000700311520135900318653002301677653001701700653001801717653001601735653001701751653001901768100001901787856009701806       1999                        eng d  a0266-467400aEffects of Dung Beetles (Scarabaeidae) on Seeds Dispersed by Howler Monkeys (Alouatta seniculus) in the French Guianan Rain Forest0 aEffects of Dung Beetles Scarabaeidae on Seeds Dispersed by Howle  bCambridge University Pressc1999/03  a129-1420 v153 aThe dispersal of seeds by howler monkeys (Alouatta seniculus) and the role of dung beetles in determining the fate of the dispersed seeds were studied at Nouragues Station, French Guiana, during three 2-mo periods (April-May, 1995-97). Howler monkeys were observed to disperse seeds of 47 plant species. Monkey dung attracted 57 species of dung beetles (Scarabaeidae), including tunnellers (maximum size 37 mm) and ball rollers (12.6 mm). The rate of seed burial was negatively correlated with seed size (10 plant species) and positively correlated with dung beetle size (six species of tunnellers). More than 80% of small seeds (< 5 mm) and 30% of large seeds (22 mm), were buried by the largest tunnellers. Dung beetles buried 13 to 23% of seeds ranging 8-13 mm in width. The maximum average depth of burial was 28 cm and varied according to the species of dung beetle. The rate of disappearance of large dung clumps varied during the day and was completed by nocturnal dung beetles. Seeds of Chrysophyllum lucentifolium (Sapotaceae) buried at 5 and 10 cm depths did not suffer predation, but showed low germination success compared to seeds left at the soil surface. Dung beetles affected the survival and distribution of a portion of the seeds dispersed by monkeys, and their relative importance in shaping seed fate depended on seed and beetle size.10aAlouatta seniculus10aDung beetles10aFrench Guiana10arain forest10aScarabaeidae10aseed dispersal1 aFeer, Francois  uhttp://links.jstor.org/sici?sici=0266-4674%28199903%2915%3A2%3C129%3AEODB%28O%3E2.0.CO%3B2-O04086nas a2200181   4500008004100000245008000041210006900121300001400190490000700204520354300211653001603754653001803770653002203788653001103810100001903821700001803840856004603858       2005                        eng d00aEffects of Forest Fragmentation on a Dung Beetle Community in French Guiana0 aEffects of Forest Fragmentation on a Dung Beetle Community in Fr  a1103-11120 v193 aAbstract: Fragmentation is the most common disturbance induced by humans in tropical forests. Some insect groups are particularly suitable for studying the effects of fragmentation on animal communities because they are taxonomically and ecologically homogenous. We investigated the effects of forest fragmentation on a dung beetle species community in the forest archipelago created in 1994-1995 by the dam of Petit Saut, French Guiana. We set and baited an equal number of pitfall traps for dung beetles on three mainland sites and seven island sites. The sites ranged from 1.1 to 38 ha. In 250 trap days, we captured 50 species in 19 genera. Diversity indices were high (2.18-4.06). The lowest diversity was on the small islands and one mainland site. Species richness and abundance were positively related to fragment area but not to distance from mainland or distance to the larger island. The islands had lower species richness and population than mainland forest, but rarefied species richness was relatively invariant across sites. There was a marked change in species composition with decreasing fragment that was not caused by the presence of a common fauna of disturbed-area species on islands. Small islands differed from larger islands, which did not differ significantly from mainland sites. Partial correlation analyses suggested that species richness and abundance of dung beetle species were positively related to the number of species of nonflying mammals and the density index of howler monkeys (Alouatta seniculus), two parameters positively related to fragment area. Efectos de la Fragmentacion de Bosques sobre una Comunidad de Escarabajos Coprofagos en La Guyana Francesa Resumen: La fragmentacion es la mas comun de las perturbaciones inducidas por humanos en bosques tropicales. Algunos grupos de insectos son particularmente adecuados para estudiar los efectos de la fragmentacion sobre comunidades animales porque son taxonomica y ecologicamente homogeneos. Investigamos los efectos de la fragmentacion de bosques sobre una comunidad de especies de escarabajos coprofagos en el archipielago de bosque creado en 1994-1995 por la presa de Petit Saut, Guyana Francesa. Colocamos y cebamos el mismo numero de trampas para escarabajos coprofagos en tres sitios continentales y siete sitios insulares. Los sitios variaron entre 1.1 y 38 ha. En 250 dias-trampa, capturamos 50 especies en 19 generos. Los indices de diversidad fueron altos (2.18-4.06). La menor diversidad ocurrio en las islas pequenas y en un sitio continental. La riqueza y abundancia de especies se relacionaron positivamente con el area del fragmento pero negativamente con la distancia al continente o a la isla mas grande. Las islas tuvieron menor riqueza de especies y tamano poblacional que el bosque continental, pero la riqueza de especies rarificada fue relativamente invariable en todos los sitios. Hubo un cambio notable en la composicion de especies con la disminucion del fragmento que no se debio a la presencia de una fauna comun de especies de areas perturbadas en las islas. Las islas pequenas difirieron de islas mas grandes que no difirieron significativamente de los sitios continentales. Los analisis de correlacion parcial sugirieron que la riqueza y abundancia de especies de escarabajos coprofagos se correlacionaron positivamente con el numero de especies de mamiferos no voladores y con el indice de densidad de monos aulladores (Alouatta seniculus), dos parametros que se relacionan positivamente con el area del fragmento.10adung beetle10afragmentation10alago guri mammals10amammal1 aFeer, Francois1 aHingrat, Yves  uhttp://www.blackwell-synergy.com/loi/cbi 02091nas a2200205   4500008004100000245011700041210006900158300001000227490000700237520135000244653001601594653001601610653002001626653001801646653002201664653001701686100001901703700002501722856013801747       2005                        eng d00aDiel flight activity and ecological segregation within an assemblage of tropical forest dung and carrion beetles0 aDiel flight activity and ecological segregation within an assemb  a21-300 v213 aTemporal variation in activity of dung and carrion beetles in tropical forest is considered as a mechanism of ecological segregation between potentially competing species. We describe the diel flight activity of Scarabaeidae collected with baited pitfall traps at Les Nouragues field station in French Guiana. A total of 2663 individuals of 63 species was recorded, from the subfamilies Coprinae, Scarabaeinae and Aphodinae. Temporal guilds of diurnal, nocturnal and crepuscular species were identified. Diurnal species were about twice as numerous and abundant as either nocturnal or crepuscular species. Two main activity patterns characterize the diurnal species while nocturnal and crepuscular species show overlapping activity. The association of activity rhythm with the other niche variables, food selection, functional group, body size and relative abundance, was analysed using multiple correspondence analysis. Small diurnal coprophagous species were opposed to large crepuscular necrophagous species. Species packing is suggested but further analysis showed that the variables were independent of one another. The temporal differentiation of species combined with separation along multiple niche dimensions and resource gradients may facilitate the coexistence of species assumed to be strongly affected by interspecific competition. 10acompetition10adung beetle10aflight activity10aFrench Guiana10aniche segregation10aScarabaeidae1 aFeer, Francois1 aPincebourde, Sylvain  uhttps://scarabnet.myspecies.info/diel-flight-activity-and-ecological-segregation-within-assemblage-tropical-forest-dung-and-carrion-b