TY - JOUR

T1 - Modelling habitat and spatial distribution of an endangered longhorn beetle

T2 - a case study for saproxylic insect conservation

AU - Buse, Joern

AU - Schroeder, Boris

AU - Aßmann, Thorsten

N1 - Funding Information: We are grateful to the administration of the biosphere reserves ‘Niedersächsische Elbtalaue’ and ‘Mittlere Elbe’ and for permission to do this study. V. Neumann contributed his expert knowledge in aspects of the species’ autecology and provided information about regional distributions of colonised trees. J.B. is supported by the DBU (German Federal Environmental Foundation). We thank Linda Froome-Döhring for the lingual revision and A.S. Pullin as well as two anonymous reviewers for their valuable comments on the manuscript.

PY - 2007/7/1

Y1 - 2007/7/1

N2 - Saproxylic insects are characterised by their exceptional diversity and high proportion of threatened species. No recent studies have demonstrated the validity of habitat suitability analysis for scientifically based habitat management for these species. We studied the habitat requirements of the endangered longhorn beetle Cerambyx cerdo, a species with a supposed keystone function for the saproxylic insect community living on oaks. We used species distribution modelling based on datasets from Central Europe to understand the species-habitat relationships and to find the environmental variables responsible for habitat selection of C. cerdo. Our results show that the most important parameters, insolation, presence of oak sap, bark depth and the distance from the next colonised tree, are able to predict the presence of C. cerdo very well. A spatial validation procedure revealed very similar predictive power, indicating the general validity of our model. Tree-level parameters were shown to have a stronger effect on the occurrence probability than landscape-level predictors. To improve the tree-level conditions (e.g. insolation on the trunk) habitat management in the form of semi-open pasture landscapes is recommended from which many other taxa will also draw considerable benefit. The provision of such conditions over decades is the essential key in the conservation of this longhorn beetle species. The success of the European network of conservation areas "Natura 2000" heavily depends on broad biological knowledge of the designated protected species. The present paper shows that species distribution models can give valuable contributions for conservation in saproxylic insects.

AB - Saproxylic insects are characterised by their exceptional diversity and high proportion of threatened species. No recent studies have demonstrated the validity of habitat suitability analysis for scientifically based habitat management for these species. We studied the habitat requirements of the endangered longhorn beetle Cerambyx cerdo, a species with a supposed keystone function for the saproxylic insect community living on oaks. We used species distribution modelling based on datasets from Central Europe to understand the species-habitat relationships and to find the environmental variables responsible for habitat selection of C. cerdo. Our results show that the most important parameters, insolation, presence of oak sap, bark depth and the distance from the next colonised tree, are able to predict the presence of C. cerdo very well. A spatial validation procedure revealed very similar predictive power, indicating the general validity of our model. Tree-level parameters were shown to have a stronger effect on the occurrence probability than landscape-level predictors. To improve the tree-level conditions (e.g. insolation on the trunk) habitat management in the form of semi-open pasture landscapes is recommended from which many other taxa will also draw considerable benefit. The provision of such conditions over decades is the essential key in the conservation of this longhorn beetle species. The success of the European network of conservation areas "Natura 2000" heavily depends on broad biological knowledge of the designated protected species. The present paper shows that species distribution models can give valuable contributions for conservation in saproxylic insects.

KW - Biology

KW - species distribution model

KW - OAK trees

KW - Wood-pasture

KW - Natura 2000

KW - semi-open landscape

KW - AUC

UR - http://www.scopus.com/inward/record.url?scp=34248597074&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f8ce0264-f6c8-3931-8702-63f16409cad3/

U2 - 10.1016/j.biocon.2007.02.025

DO - 10.1016/j.biocon.2007.02.025

M3 - Journal articles

VL - 137

SP - 372

EP - 381

JO - Biological Conservation

JF - Biological Conservation

SN - 0006-3207

IS - 3

ER -