Species variables or environmental variables as indicators of forest biodiversity: a case study using saproxylic beetles in Maritime pine plantations

To assess the sustainability of plantation forest management we compare two types of biodiversity indicators. We used the species richness of saproxylic beetles as a case study to test the “species” and “environmental” indicator approaches. We compared single species abundance or occurrence and deadwood volume or diversity as predictor variables. • Beetles were sampled with flight interception traps in 40 Maritime pine plantation stands. The volume and diversity of deadwood was estimated with line intersect and plot sampling in the same stands. Predictive models of species richness were built with simple linear or Partial Least Square regressions. • Deadwood variables appeared to be good predictors of saproxylic beetle richness at the stand-scale with at least 75% of variance explained. Deadwood diversity variables consistently provided better predictive models than volume variables. The best environmental indicator was the diversity of deadwood elements larger than 15 cm in diameter. • By contrast, the use of “species variables” appeared to be less relevant. To reach the quality of prediction obtained with “environmental variables”, the abundance or occurrence of 6 to 7 species – some of which are difficult to identify – had to be used to build the indicator

Urwaldrelikt-Arten - Xylobionte Käfer als Indikatoren für Strukturqualität und Habitattradition

On the basis of the list of saproxylic beetles of Germany, the authors present a definition and list of “Urwald relict species”, comprising 115 beetles that are considered to be associated with primeval forest (“Urwald”) structures and features. We use the term “habitat tradition” to describe a continuity in supply of old growth dead wood and forest structures. The selection of species is made on behalf of the following criteria: relict records in Central Europe; attachment to continuity of deadwood resources and habitat tradition; continuity of old growth stand features like tree and deadwood maturity and di-versity; absence from cultivated Central European forest.Urwaldrelikt-Arten - Xylobionte Käfer als Indikatoren für Strukturqualität und Habitattradition Auf der Basis der Liste xylobionter Käfer Deutschlands legen die Autoren eine Definition und Liste von 115 Käferarten vor, die in Deutschland als Urwaldreliktarten bezeichnet werden können. Wir definieren die Kontinuität eines Bestandes hinsichtlich Totholzangebot und Bestandsstruktur als „Habitattradition“. Die Auswahl der Arten erfolgt anhand folgender Kriterien: Reliktäres Vorkommen in Mitteleuropa; Bindung an Strukturkontinuität bzw. Habitattradition sowie Kontinuität der Alters- und Zerfallsphase; hohe Ansprüche an Totholzqualitäten und –quantitäten; aus den kultivierten Wäldern Mitteleuropas verschwindend oder schon verschwunden

Une nouvelle espèce de Geotrogus Guérin-Méneville pour la faune du Maroc et catalogue actualisé des espèces du genre (Coleoptera: Scarabaeoidea: Melolonthidae: Rhizotrogini)

Une nouvelle espèce de Geotrogus Guérin-Méneville, 1842 est décrite du Parc National de Talassemtane (Rif occidental, district de Chefchaouen, Maroc). Le genre regroupe à présent 43 espèces dont nous donnons un catalogue actualisé

Phoracantha semipunctata (Fabricius, 1775) en région toulousaine. Actualisation de son expansion et remarques sur P. recurva Newman, 1840 (Coleoptera, Cerambycidae)

Phoracantha semipunctata fait partie de la faune de France continentale depuis quelques décennies et poursuit son expansion. Nous le signalons pour la première fois en Haute-Garonne. Une liste des coléoptères observés sur Eucalyptus à Toulouse, quelques rappels sur la biologie du P. semipunctata et sur la présence en France du P. recurva sont donnés

Faunistic notes on Cryptophagidae and Latridiidae of Talassemtane National Park, Western Rif, Morocco, with the description of a new species (Coleoptera, Cucujoidea)

In order to contribute to the knowledge of beetles (Coleoptera) of the mountainous region of Morocco, Talassemtane National Park (Western Rif, Chefchaouen district, Morocco) was surveyed. This is an exceptional protected area of the Mediterranean Intercontinental Biosphere Reserve (RIBM). The checklist was made using different traps combined with active periodical searches during 2013–2015. A total of 153 beetles belonging to 19 species from four subfamilies (Cryptophagidae: Cryptophaginae and Atomariinae; Latridiidae: Latridiinae and Corticariinae) was collected. Dienerella (Cartoderema) talassemata, a new species (Coleoptera: Latridiidae) was compared to other morphologically related species. One species is recorded for the first time for North Africa; three species are new records for Morocco. In addition, amongst the species listed, three are endemic to Morocco: Dienerella talassemtana sp. n., Caenoscelis humifera and Dienerella besucheti

Évaluation de la biodiversité entomologique des vieilles forêts de la Réserve de biosphère Luberon-Lure

Les auteurs donnent une liste de 350 coléoptères (espèces non saproxyliques incluses) déterminés dans le cadre d’un inventaire réalisé pour le Parc naturel régional du Lubéron en 2015, sur plusieurs forêts anciennes. Quelques espèces remarquables font l’objet de commentaires faunistique

Les coléoptères saproxyliques dans la gestion de la forêt de Grésigne

The Grésigne State Forest (Tarn, France) has been included in the European network Natura 2000 for its exceptional entomological richness, especially with saproxylic beetles. Among the many species encountered, the three species listed in the annexe II of the Habitat Directive, Limoniscus violaceus, Cerambyx cerdo and Lucanus cervus, are characteristic of different habitats (cavities at the bottom of the trees, dying trees and decaying wood) and imply specific management rules for their conservation. First, an "objective document" (Docob) was drawn up in appliance of the Habitat Directive. Then, a new forest management plan (2004-2021) was established, including measures to preserve these high heritage value species: setting up a network of old stands, increasing the dead wood volume compartment, preserving trees with cavities. Part of these measures is fi nanced by a Natura 2000 contract, on a French state-European Community joint basisLa forêt domaniale de Grésigne (Tarn, France) a été incluse dans le réseau européen Natura 2000 pour son exceptionnelle richesse entomologique, en particulier en coléoptères saproxyliques. Parmi les nombreuses espèces rencontrées, les trois qui figurent en annexe II de la Directive Habitat, Limoniscus violaceus, Cerambyx cerdo et Lucanus cervus, sont caractéristiques de divers habitats (cavités à la base des arbres, arbres mourants et bois en décomposition) et requièrent des règles de gestion particulières pour assurer leur préservation. Dans un premier temps, un «document d'objectifs» (Docob) a été établi en application de la Directive Habitat. Puis un nouveau plan de gestion forestière (2004-2021) a été élaboré, incluant des mesures pour préserver ces espèces à forte valeur patrimoniale: mise en place d'un réseau de vieux peuplements, augmentation du compartiment de bois de mort, conservation d'arbres ayant des cavités. Une partie de ces mesures est financée par un contrat Natura 2000 sur la base d'un partenariat État français - Communauté européenne

The influence of spatial and temporal discontinuities of forest habitats on the current presence of flightless saproxylic beetles

Flightless saproxylic beetles were selected in order to study the impact of temporal and spatial discontinuity of forests. They were chosen because: (1) they are unable to fly, making them dispersal-limited species, (2) they have a saproxylic diet, which means they are closely linked to the forest, and (3), they have rarely been studied. Forest temporal continuity was expected to be the main factor explaining the presence of these species, modulated by the past and present amount of forest in the surrounding landscape. Twenty-seven forests, distributed into three zones, were sampled in southwestern France. Flightless saproxylic beetles were surveyed using a Winkler extractor and a Berlese funnel. Their presence/absence were modelled using generalised linear mixed models, with zone variable as random effect. Two species showed significant zone effect and were only or more present in the zone with the highest present forest amount in a 0.5 km radius. In the model that converged, the only selected variable was the past amount of forest in the landscape. The size of the forest, the presence of dead wood and the forest temporal continuity were not included in this model. The importance of the amount of forest in the landscape supports the hypothesis that dispersal-limited species are affected by landscape characteristics. This study demonstrates an important link between the presence of Dienerella clathrata and the amount of forest in the past, which led to an indicator species analysis being performed

Bilan des connaissances, inventaires 2016 et cartographie de cinq coléoptères saproxyliques d’intérêt communautaire dans les sites Natura 2000 de la région PACA : Stephanopachys linearis, Stephanopachys substriatus, Limoniscus violaceus, Osmoderma eremita et Rosalia alpina

Sept espèces de coléoptères saproxylophages inscrites à l'annexe 2 de la directive Habitats (DH2) sont connues avec certitude en région PACA. Une huitième a été signalée : Cucujus cinnaberinus (Cucujidae), dont une ancienne mention dans le secteur de Saint-Martin-Vésubie semble plausible (Brustel & Gouix, 2012