01861nas a2200193   4500008004500000245014700045210006900192300001000261490000700271520112900278653001201407653002201419653001401441653002201455653001201477100002201489700001801511856013801529       2002                        spandsh  00aPatrones de diversidad de grupos selectos de insectos en el bosque Chiquitano y pampas del cerrado de Santiago y Tucavaca, Santa Cruz, Bolivia0 aPatrones de diversidad de grupos selectos de insectos en el bosq  a37-460 v113 aAs part of a biological survey of Eastern Santa Cruz, four insect indicator groups (dung beetles, Scarabaeidae; tiger beetles, Cicindelidae; tabanid dipterans, Tabanidae; and diurnal butterf l i e s , Rhopalocera) were assessed at different sites and habitats in the Serranía de Santiago and in the Valle de Tucavaca. Using four trap types, 14 211 insect specimens, belonging to 102 dung beetle species, 18 tiger beetle species, 16 tabanid species, and 83 butterfly species were collected and classified during 21 sampling days. Among the five habitats that were sampled, the semi-deciduous Chiquitano forest and the riverine forest showed higher species richness of dung beetles and butterflies than the Cerrado savannas and other habitats. Some taxa of dung beetles and butterflies were classified as habitat specialists, while fewer ones were classified as generalists. Preliminary data suggest that regional diversity depends more on movement of species between sites than on species richness of different habitats at each site. We discuss the limitations of this study and present recommendations for future surveys. 10aBolivia10aChiquitano forest10adiversity10aindicator species10ainsects1 aGutierrez, Teresa1 aRumiz, Damian  uhttps://scarabnet.myspecies.info/patrones-de-diversidad-de-grupos-selectos-de-insectos-en-el-bosque-chiquitano-y-pampas-del-cerrado-d02115nas a2200361   4500008004100000245007100041210006600112300001200178490000700190520103600197653001701233653002301250653002201273653002401295653002101319100002001340700001501360700001901375700002401394700002001418700001801438700002101456700002101477700001401498700002501512700002101537700001801558700002401576700002001600700002001620700001901640856009401659       2008                        eng d00aThe cost-effectiveness of biodiversity surveys in tropical forests0 acosteffectiveness of biodiversity surveys in tropical forests  a139-1500 v113 aThe identification of high-performance indicator taxa that combine practical feasibility and ecological value requires an understanding of the costs and benefits of surveying different taxa. We present a generic and novel framework for identifying such taxa, and illustrate our approach using a large-scale assessment of 14 different higher taxa across three forest types in the Brazilian Amazon, estimating both the standardized survey cost and the ecological and biodiversity indicator value for each taxon. Survey costs varied by three orders of magnitude, and dung beetles and birds were identified as especially suitable for evaluating and monitoring the ecological consequences of habitat change in our study region. However, an exclusive focus on such taxa occurs at the expense of understanding patterns of diversity in other groups. To improve the cost-effectiveness of biodiversity research we encourage a combination of clearer research goals and the use of an objective evidence-based approach to selecting study taxa. 10abiodiversity10acost-effectiveness10aindicator species10asampling efficiency10aTropical forests1 aGardner, T., A.1 aBarlow, J.1 aAraujo, I., S.1 aAvila-Pires, T., C.1 aBonaldo, A., B.1 aCosta, J., E.1 aEsposito, M., C.1 aFerreira, L., V.1 aHawes, J.1 aHernandez, M., I. M.1 aHoogmoed, M., S.1 aLeite, R., N.1 aLo-Man-Hung, N., F.1 aMalcolm, J., R.1 aMartins, M., B.1 aMestre, L., A.  uhttps://scarabnet.myspecies.info/cost-effectiveness-biodiversity-surveys-tropical-forests02981nas a2200337   4500008004100000245010700041210006900148260000800217300001200225490000700237520204300244653001602287653001802303653001502321653001702336653002102353653001202374653002402386653002202410653001502432653001502447653001702462653001402479653001702493653002102510653001902531100002002550700002502570700001402595856003402609       2002                        eng d00aThe verification and application of bioindicators: a case study of dung beetles in a savanna ecosystem0 averification and application of bioindicators a case study of du  cAug  a661-6720 v393 a1.Bioindicators of habitat quality and environmental change must be identified quantitatively and tested independently to confirm their usefulness. We used the indicator value (IndVal ) method, which combines measures of habitat fidelity and specificity, to assess the indicator responses of dung beetles (Coleoptera: Scarabaeidae) in Tembe Elephant Park, South Africa. The indicator responses were verified by sampling in different areas of the Park, 2 years after the responses were originally quantified. 2. We postulated that terrestrial insect indicators with different combinations of habitat specificity and fidelity might fulfil different indicator roles. Indicator species with strong habitat specificity (characteristic species) are unlikely to provide information on the direction of ecological change despite high vulnerability. Rather, detector species that span a range of ecological states are likely to be better in this role. We used IndVal for selecting such detector species that indicate the direction of ecological change. 3. Sets of species were found to be robust bioindicators, i.e. reliably characteristic across the habitat of which they were indicative. The suite of indicators was refined by discarding those with IndVal s that varied significantly across years, thus improving the confidence in the final suite of species selected. By clearly responding to a change in habitat between two ecological states, detector species provided information complementary to that provided by characteristic species. 4. The IndVal method enabled both the identification and testing of indicator (characteristic and detector) species. Because of its resilience to changes in abundance, IndVal is a particularly effective tool for ecological bioindication. 5. We conclude that both characteristic and detector species are useful bioindicators of habitat quality and conversion. We propose that bioindicators that are categorized and verified in this way will have valuable application in the monitoring of habitat integrity.10aassemblages10abioindication10aCOLEOPTERA10aconservation10adetector species10ahabitat10ahabitat specificity10aindicator species10aindicators10arange size10aScarabaeidae10aSELECTION10asouth-africa10aspecies richness10atransformation1 aMcGeoch, M., A.1 aVan Rensburg, B., J.1 aBotes, A.  u<Go to ISI>://00017725500001102525nas a2200253   4500008004100000245009700041210006900138300001200207490000800219520166500227653002901892653001501921653002701936653002201963653001701985653001702002100002002019700002402039700002702063700002002090700002102110700002202131856011802153       2007                        eng d00aGrazing promotes dung beetle diversity in the xeric landscape of a Mexican Biosphere Reserve0 aGrazing promotes dung beetle diversity in the xeric landscape of  a308-3170 v1403 aWe analyze the impact of grazing on dung beetle diversity at the Barranca de Metztitla ́ n Biosphere Reserve, a xeric ecosystem in central Mexico with a long history of use by humans. We compared the community structure, as well as the alpha and beta diversity between two cover conditions (open and closed vegetation) that represent the impact of grazing within a habitat, and between habitat types (submountainous and crassicaule scrublands). From 576 samples we collected 75,605 dung beetles belonging to 20 taxa. While mean species richness and diversity were different between habitat types, cumulative spe- cies richness was not. The effects of grazing on vegetation structure influenced the cumu- lative species richness and diversity of dung beetles in the submountainous scrubland, where grazing has created land mosaics of a grassland matrix with scrubland patches. This was not the case in the crassicaule scrubland where the impact of grazing is not as evident. Beta diversity significantly responds to the effects of grazing on habitat conditions. We dis- cuss the ecological factors that may promote these responses by landscape diversity com- ponents. We also identify the species that could act as useful indicators to monitor the effect of land management on biodiversity. Our results indicate cattle farming maintains a diversified land mosaic, and these areas support more diverse dung beetle ensembles than homogeneous areas of closed, shrubby vegetation cover. Thus, controlled grazing activity could certainly favour the conservation of dung beetle biodiversity and improve ecosystem functioning by maintaining dung decomposition rates. 10aAlpha and beta diversity10aAphodiinae10aBarranca de Metztitlan10aindicator species10aLand mosaics10aScarabaeidae1 aVerdu, Jose, R.1 aMoreno, Claudia, E.1 aSanchez-Rojas, Gerardo1 aNuma, Catherine1 aGalante, Eduardo1 aHalffter, Gonzalo  uhttps://scarabnet.myspecies.info/grazing-promotes-dung-beetle-diversity-xeric-landscape-mexican-biosphere-reserve