@article {2218, title = {Biogeographic crossroads as priority areas for biodiversity conservation}, journal = {Conservation Biology}, volume = {16}, number = {6}, year = {2002}, note = {Times Cited: 0Cited Reference Count: 61Cited References: BALMFORD A, 1995, CONSERV BIOL, V9, P1539 BATES JM, 1998, BIOL ASSESSMENT PARQ, P112 BROOKS DR, 1992, TRENDS ECOL EVOL, V7, P55 BROOKS T, 2000, NATURE, V403, P26 BROWN JH, 1984, AM NAT, V124, P255 BROWN JH, 1995, MACROECOLOGY CHANNELL R, 2000, NATURE, V403, P84 DALLMEIER F, 1996, MANU DIVERSITY SE PE, P61 DAVIS FW, 1996, BIOSCIENCE, V46, P74 DINERSTEIN E, 1995, CONSERVATION ASSESSM EDMONDS WD, 1994, REVISION PHANAEUS MA EDMONDS WD, 1972, U KANSAS SCI B, V49, P731 EMMONS LH, 1998, BIOL ASSESSMENT PARQ, P129 ENSERINK M, 1997, SCIENCE, V276, P1791 ERWIN TL, 1996, MANU BIODIVERSITY SE, P359 ERWIN TL, 1991, SCIENCE, V253, P750 FELGER RS, 1994, BIODIVERSITY MANAGEM, P36 FJELDSA J, 1997, TROPICAL FOREST REMN, P466 FOREMAN D, 2000, WILD EARTH SPR, P11 FORSYTH AB, 1998, BIOL ASSESSMENT PARQ, P181 FREITAG S, 1997, BIOL CONSERV, V82, P263 HALFFTER G, 1993, BIOL INT, V27, P15 HANSKI I, 1991, DUNG BEETLE ECOLOGY HARVEY MB, 1998, BIOL ASSESSMENT PARQ, P144 HOLDRIDGE LR, 1967, LIFE ZONE ECOLOGY JOHNSON N, 1995, BIODIVERSITY BALANCE KERR JT, 1997, CONSERV BIOL, V11, P1094 KILLEEN TJ, 1998, BIOL ASSESSMENT PARQ, P61 KITCHING IJ, 1996, BIODIVERS CONSERV, V5, P841 KREMEN C, 1993, CONSERV BIOL, V7, P796 LOMOLINO MV, 1998, CONSERV BIOL, V12, P481 LOMOLINO MV, 1995, J MAMMAL, V76, P335 MARGULES CR, 2000, NATURE, V405, P243 MAYR E, 1963, ANIMAL SPECIES EVOLU MCKENZIE NL, 1989, BIOL CONSERV, V50, P231 MITTERMEIER RA, 1998, CONSERV BIOL, V12, P516 MYERS N, 2000, NATURE, V403, P853 OLIVER I, 1998, CONSERV BIOL, V12, P822 OLSON DM, 1998, CONSERV BIOL, V12, P502 PEARSON DL, 1992, CONSERV BIOL, V6, P376 PEARSON DL, 1999, J BIOGEOGR, V26, P1079 POGUE MG, 1996, MANU BIODIVERSITY SE, P313 PRENDERGAST JR, 1999, CONSERV BIOL, V13, P484 PRENDERGAST JR, 1997, ECOGRAPHY, V20, P210 PRENDERGAST JR, 1993, NATURE, V365, P335 PRESSEY RL, 1993, TRENDS ECOL EVOL, V8, P124 REID WV, 1998, TRENDS ECOL EVOL, V13, P275 REMSEN V, 1995, BIRD CONSERV INT, V5, P181 RICKETTS TH, 1999, BIOSCIENCE, V49, P369 RODRIGUES ASL, 1999, P ROY SOC LOND B BIO, V266, P1453 ROTHLEY KD, 1999, ECOL APPL, V9, P741 SARMIENTO J, 1998, BIOL ASSESSMENT PARQ, P167 SCHNEIDER CJ, 1999, P NATL ACAD SCI USA, V96, P13869 SMITH TB, 1997, SCIENCE, V276, P1855 SPECTOR S, 1998, CONSERVATION CHANGIN, P181 VANEWRIGHT RI, 1991, BIOL CONSERV, V55, P235 WARSHALL P, 1994, BIODIVERSITY MANAGEM, P408 WHITTAKER RH, 1972, TAXON, V21, P213 WIKRAMANAYAKE E, 1998, BIODIVERSITY ASSESSM WILLIAMS P, 1996, CONSERV BIOL, V10, P155 WILLIAMS PH, 1996, BIOL J LINN SOC, V58, P125EnglishArticle618LTCONSERV BIOL}, month = {Dec}, pages = {1480-1487}, abstract = {Threats to biodiversity outpace the resources of the conservation community and necessitate careful prioritization of conservation actions. I suggest that targeting the regions where biogeographic assemblages intersect - " biogeographic crossroads" - is a strategy that may achieve significant conservation economy by focusing on areas that satisfy many conservation criteria. I used a combination of data on Scarabaeine beetles in Bolivia and on other taxa and locations from the literature to consider the short- and long-term benefits of conserving these biogeographic crossroads. Biogeographic crossroads are areas of high species richness and beta diversity, often across many taxonomic groups. They are also regions where representativeness can be achieved with relative efficiency. Recent evidence that ecotones may be loci of evolution suggests that evolutionary processes such as speciation and coevolution may be conserved at biogeographic crossroads. Biogeographic crossroads appear to be areas of high conservation priority and opportunity in both the short and long term and require increased attention in the process of setting conservation priorities.}, keywords = {assemblages, complementary areas, congruence, diversity, forest, hotspots, patterns, species richness, strategies, tiger beetles}, url = {://000179420100009}, author = {Spector, S.} } @article {2220, title = {Rapid turnover and edge effects in dung beetle assemblages (Scarabaeidae) at a Bolivian Neotropical forest-savanna ecotone}, journal = {Biotropica}, volume = {35}, number = {3}, year = {2003}, note = {744QYBIOTROPICA}, month = {Sep}, pages = {394-404}, abstract = {Habitat fragmentation and the widespread creation of habitat edges have recently stimulated interest in assessing the effects of ecotones on biodiversity. Ecotones, natural or anthropogenic, can greatly affect faunal movement, population dynamics, species interactions, and community structure. Few data exist, however, on insect community response to forest- savanna ecotones, a natural analog to anthropogenically cleared areas adjacent to forest. In this study, the abundance, total biomass, average individual biomass, and distribution of scarabaeine dung beetles were examined at a sharp tropical evergreen forest-savanna ecotone in Santa Cruz, Bolivia. The abundance, total biomass, and average individual biomass of dung beetles varied significantly across the forest, edge, and savanna habitats. Species richness (S-obs) also varied significantly across the three habitats, but statistical estimations of true species richness (S-est) did not. Habitat specificity of the dung beetles in this study was extremely high. Of the 50 most common species collected during the study, only 2 species were collected in both the forest and savanna habitats, signaling nearly complete community turnover in just a few meters. Strong edge effects were evidenced by the decline in abundance, total biomass, and species richness at the forest-savanna boundary.}, keywords = {beta diversity, Bolivia, boundaries, Central Amazonia, COLEOPTERA, communities, conservation, Dung beetles, dynamics, ecotone, edge, fragmented forests, gradients, patterns, responses, savanna, tropical forest}, url = {://000186644700009}, author = {Spector, S. and Ayzama, S.} }