Search

The Red List Index (RLI) measures change in the aggregate extinction risk of species. It is a key indicator for tracking progress toward nine of the Aichi and many proposed post‐2020 Global Biodiversity Framework Targets. Here, we consider two formulations of the RLI used for reporting biodiversity trends at national scales. Disaggregated global RLIs measure changing national contributions to global extinction risk and are currently based on five taxonomic groups, while national RLIs measure changing national extinction risk and are based on taxonomic groups assessed multiple times in country. For 74% of nations, the disaggregated global RLI is currently based on three or fewer taxonomic groups. Meanwhile, national RLIs from selected pilot countries Finland, South Africa, and Brazil are computed from twelve, eight, and nine taxonomic groups, respectively. The national RLI and the disaggregated global RLI measure different aspects of biodiversity, in that the former detects national trends in populations of species for which each country is responsible while the latter provides standardized comparisons of nations' contributions to the global extinction risk of the same species groups. As governments commit to the post‐2020 Global Biodiversity Framework, we encourage them to monitor a standard set of taxonomic groups representing different biomes using both RLI formulations to ensure effective target tracking and accurate feedback on their conservation investments. [ABSTRACT FROM AUTHOR]

To purchase or authenticate to the full-text of this article, please visit this link: http://dx.doi.org/10.1111/j.1523-1739.2006.00511.x Byline: ESKO HYVARINEN ([dagger]), JARI KOUKI ([dagger]*), PETRI MARTIKAINEN ([dagger]) Keywords: Coleoptera; controlled burning; management; residual trees; saproxylic; threatened species Abstract: Abstract: Habitat loss, fragmentation, and declining habitat quality have created an extinction debt in boreal forests, which could be partly reversed by deliberately improving the habitat quality in managed areas outside reserves. We studied the effects of green-tree retention and controlled burning on red-listed and rare, deadwood-dependent (saproxylic) beetles in a large-scale field experiment in eastern Finland. Our factorial study design included 24 sites dominated by Scots pine (Pinus sylvestris L.) and with three levels of green-tree retention (0, 10, and 50 m.sup.3/ha) and uncut controls. Twelve of the 24 sites were burned in 2001. We sampled beetles with 10 flight-intercept traps on each site during the years 2000-2002 (i.e., 1 pretreatment and 2 post-treatment years). A total sample of 153,449 individuals representing 1,160 beetle species yielded 2,107 specimens of 84 red-listed or rare saproxylic species. The richness of these species was higher on the burned than on the unburned sites, and higher levels of green-tree retention promoted species richness, but there were clear differences between the years. The richness of red-listed and rare saproxylic species increased in the first post-treatment year, evidently due to the treatments, continued to increase on the burned sites in the second post-treatment year, but decreased on the unburned sites. Our results showed that the living conditions of many red-listed and rare saproxylic species could be improved significantly with rather simple alterations to forest management methods. Controlled burning with high levels of green-tree retention creates resources for many saproxylic species, but increasing the levels of green-tree retention in unburned areas can also be beneficial. Abstract (Spanish): Fuego y Retencion de Arboles Verdes en la Conservacion de Escarabajos en la Lista Roja y Raros y Dependientes de Madera Muerta en Bosques Boreales Finlandeses Resumen: La perdida de habitat, la fragmentacion y la declinacion de la calidad del habitat han creado una deuda de extincion en bosques boreales, que podria ser revertida parcialmente mediante la mejoria deliberada de la calidad del habitat en areas administardas afuera de las reservas. Estudiamos los efectos de la retencion de arboles verdes y del fuego controlado sobre escarabajos dependientes de madera muerta (saproxilicos) en la lista roja y raros en un experimento de gran escala en el este de Finlandia. Nuestro diseno factorial del estudio incluyo 24 sitios dominados por Pinus sylvestris L. y con tres niveles de retencion de arboles verdes (0, 10 y 50 m.sup.3/ha) y controles sin corte. Doce de los 24 sitios fueron quemados en 2001. Muestreamos escarabajos con 10 trampas de intercepcion de vuelo en cada sitio durante los anos 2000-2002 (i.e., 1 ano antes del tratamiento y 2 despues del tratamiento). Una muestra total de 153,449 individuos representando 1,160 especies de escarabajos produjo 2,107 especimenes de 84 especies saproxilicas en la lista roja y raras. La riqueza de estas especies fue mayor en los sitios quemados que en los no quemados, y los mayores niveles de retencion de arboles verdes promovio la riqueza de especies, pero hubo claras diferencias entre anos. La riqueza de especies saproxilicas enlistadas y raras incremento en el primer ano despues del tratamiento, evidentemente debido a los tratamientos, continuo incrementando en los sitios quemados durante el segundo ano despues del tratamiento, pero disminuyo en los sitios no quemados. Nuestros resultados mostraron que las condiciones de vida de muchas especies saproxilicas enlistadas y raras pueden ser mejoradas significativamente mediante alteraciones relativamente simples de los metodos de gestion forestal. El fuego controlado combinado con niveles altos de retencion de arboles verdes crea recursos para muchas especies saproxilicas, pero el incremento de los niveles de retencion de arboles verdes en sitios sin quemar tambien puede ser benefico. Author Affiliation: ([dagger])Faculty of Forest Sciences, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland Article History: Paper submitted October 17, 2005; revised manuscript accepted February 1, 2006. Article note: (*) email jari.kouki@joensuu.fi