TY - JOUR T1 - Space and time distribution along a succesional gradient of coprofagous coleopterans (Scarabaeinae, Aphodiinae) in a tropical montane forest, Narino Colombia JF - Revista De Biologia Tropical Y1 - 2000 A1 - Escobar, F. A1 - de Ulloa, P. C. SP - 961 EP - 975 KW - Aphodiinae KW - Colombian Andes KW - consequences KW - diversity and conservation KW - Dung beetles KW - fragmentation KW - heterogeneity KW - Scarabaeinae KW - soil-moisture KW - spatial KW - succession gradient AB - Dung beetles (Scarabaeinae y Aphodiinae) were used to evaluate the effects of human activities in the area surrounding La Planada Natural Reserve, southwestern Colombia. During 1993 we monitored three habitats: primary and secondary forest, and open fields used for cattle grazing. A total of 55 295 trap / hours, evenly distributed among the three habitat types, captured 9 115 individuals (18 species, 11 general. There were differences in species richness between habitats (F-2,F-9 = 29.88; P < 0.001), an in number of individuals (F-2,F-9 = 36.22; P < 0.001). Collecting sites differed within habitats. Cluster analyses show that species composition differs between habitats with and without tree cover. Open areas act as barriers for movements of forest species. Differences between habitats and collecting sites may reflect high environmental heterogeneity, land use history of the sites or the influence of nearby disturbance. Some of the species found in open fields come from lower elevations and are usually associated with intense human disturbance. The proportion of digging and rolling: species is similar in both primary and secondary forest, nocturnal species are more abundant; in open areas rolling species are absent and the number of diurnal species increases. We found no relationship between rainfall and species richness (r(2) = 0.26; P = 0.41), nor between rainfall and number of individuals collected throughout the year (r(2) = 0.07; P = 0.84). For all species the number of individuals collected decreased during dry season and during the onset of the rainy season. VL - 48 UR - ://000169720900020 N1 - Times Cited: 0Cited Reference Count: 39Cited References: AMAT G, 1997, CALDASIA, V19, P191 ANDRADE IG, 1992, BIODIVERSIDAD CONSER, P9 BREYTENBACH W, 1986, J ENTOMOL SOC S AFR, V49, P359 CAVALIER J, 1991, BOSQUES NIEBLA COLOM, P69 DOUBE BM, 1991, DUNG BEETLE ECOLOGY, P133 EDWARDS PB, 1991, FUNCT ECOL, V5, P617 ELLIOT JM, 1977, SOME METHODS STAT AN EMLEN DJ, 1997, P ROY SOC LOND B BIO, V264, P567 ESCOBAR F, 1999, 4 REUN LAT AM SCAR V, P135 ESCOBAR F, 2000, ACTA ZOOL MEX, V79, P103 ESCOBAR F, 1997, CALDASIA, V19, P419 ESCOBAR F, 1994, THESIS U VALLE CALI ESPINAL S, 1977, ZONAS VIDA FORMACION, V13 ESTRADA A, 1993, J TROP ECOL, V9, P45 FAVILA ME, 1997, ACTA ZOOLOGICA MEXIC, V72, P1 FAVILA ME, 1993, ETHOL ECOL EVOL, V5, P319 FAVILA ME, 1988, FOLIA ENTOMOL MEX, V75, P117 FINCHER GT, 1973, COL B, V27, P33 FORMAN RTT, 1995, LAND MOSAICS HALFFTER G, 1993, BIOL INT HALFFTER G, 1966, FOLIA ENTOMOL MEXICO, V12, P1 HALFFTER G, 1992, FOLIA ENTOMOLOGICA M, V84, P131 HANSKI I, 1991, DUNG BEETLES ECOLOGY, P331 HANSKI I, 1989, ECOSYSTEMS WORLD B, V14, P489 HOBBS RJ, 1992, CONSERV BIOL, V6, P324 JANZEN HD, 1982, OIKOS, V33, P274 KATTAN GH, 1996, FOREST PATCHES TROPI, P3 KLEIN BC, 1989, ECOLOGY, V70, P1715 LORD JM, 1990, CONSERV BIOL, V4, P197 NEALIS VG, 1977, CAN J ZOOL, V5, P138 ROUGON D, 1991, DUNG BEETLE ECOLOGY, P230 SAUNDERS DA, 1991, CONSERV BIOL, V5, P18 SOKAL RR, 1981, BIOMETRY SOWIG P, 1996, ECOGRAPHY, V19, P254 SOWIG P, 1995, ECOGRAPHY, V18, P147 STOUFFER PC, 1995, ECOLOGY, V76, P2429 VANDERHAMMEN T, 1995, BIODIVERS CONSERV, P603 WEINS JA, 1993, OIKOS, V66, P369 WOLDA H, 1988, ANNU REV ECOL SYST, V19, P1FrenchArticle450BDREV BIOL TROP ER - TY - JOUR T1 - Temporal shifts in dung beetle community structure within a protected area of tropical wet forest: a 35-year study and its implications for long-term conservation JF - Journal of Applied Ecology Y1 - 2008 A1 - Escobar, F. A1 - Halffter, G A1 - Solis, A A1 - Halffter, V A1 - Navarrete, D SP - 1584 EP - 1592 VL - 45 ER - TY - JOUR T1 - Global dung beetle response to tropical forest modification and fragmentation: A quantitative literature review and meta-analysis JF - Biological Conservation Y1 - 2007 A1 - Nichols, E. A1 - Larsen, T. A1 - Spector, S. A1 - Davis, A. L. A1 - Escobar, F. A1 - Favila, M. A1 - Vulinec, K. SP - 1 EP - 19 KW - Agroforestry KW - community ecology KW - deforestation KW - Invertebrate KW - Land-use change KW - Scarabaeinae AB - Although insects are crucial for maintaining ecosystem function, our understanding of their overall response to human activity remains limited. This is no less true of dung-burying beetles (Coleoptera: Scarabaeidae: Scarabaeinae), which provide a suite of critical ecosystem functions and services, yet but face multiple conservation threats, particularly from landscape conversion. Here we use a review and meta-analysis to synthesize the current knowledge concerning response to tropical forest modification and fragmentation of dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae). For every modified habitat type and individual forest fragment across 33 studies, we calculated six dung beetle community parameters, standardized relative to intact tropical forest. We organized modified habitats along an approximate disturbance gradient ranging from selectively logged, late and early secondary forest, through agroforestry, tree plantations, to annual crops, cattle pastures and clear-cuts. Secondary forests, selectively logged forest and agroforests supported rich communities with many intact forest species, while cattle pastures and clear-cuts contained fewer species overall with few forest-dwelling species. Abundance generally declined with increasing modification, but was quite variable. Communities in open habitats were often characterized by hyper-abundance of a small number of small-bodied species, leading to low evenness. Across fragmentation studies, dung beetle species richness, abundance and evenness declined in smaller forest fragments. Richness and abundance sometimes declined in more isolated fragments, although this response appeared to depend on matrix quality. Across both habitat modification and fragmentation studies, geographic location and landscape context appeared to modify dung beetle response by influencing the available pool of colonists. We discuss potential underlying mechanisms and conclude with recommendations for management and conservation and for future research. VL - 137 UR - http://www.sciencedirect.com/science/article/B6V5X-4ND710H-1/2/3d7a5f4362824647199ebdfd5821fa14 ER -