Forested urban areas provide many important ecosystem services and their preservation is considered of paramount importance. Although urban forest are known to host a high diversity of saproxylic beetles (i.e. those associated with dead wood), contributions dealing with the role of urban green spaces for their conservation are lacking. We investigated the importance of urban green spaces for saproxylic and non-saproxylic tenebrionid beetles in urban Rome. Based on species vulnerability scores we calculated two indices of area prioritisation, the Biodiversity Conservation Concern (BCC) and the Biodiversity Conservation Weight (BCW) for saproxylic and non-saproxylic species. Site area and forest surface correlated positively with saproxylic richness, whereas site isolation correlated negatively with non-saproxylic richness. BCC and BCW values for saproxylic species were positively correlated with distance from the city centre. For non-saproxylic species, BCW values were negatively correlated with distance from adjacent areas. These results suggest that saproxylic beetles require large areas covered by forest, but are not strongly influenced by isolation, which is important for non-saproxylic species. Non-saproxylic tenebrionids have limited dispersal capabilities, which explains their sensitivity to isolation, but are generally eurytopic species frequently found even in the city centre. By contrast, most saproxylic species are able to fly, but are mainly found in peripheral areas with large and relatively well preserved forest fragments. Maintaining and possibly enhancing connectivity among green spaces is important for the conservation of non-saproxylic species, whereas preserving large forest surfaces, especially in peripheral areas, is needed for the conservation of saproxylic species.

Role of urban green spaces for saproxylic beetle conservation: a case study of tenebrionids in Rome, Italy

FATTORINI, SIMONE
;
GALASSI, Diana Maria Paola
2016-01-01

Abstract

Forested urban areas provide many important ecosystem services and their preservation is considered of paramount importance. Although urban forest are known to host a high diversity of saproxylic beetles (i.e. those associated with dead wood), contributions dealing with the role of urban green spaces for their conservation are lacking. We investigated the importance of urban green spaces for saproxylic and non-saproxylic tenebrionid beetles in urban Rome. Based on species vulnerability scores we calculated two indices of area prioritisation, the Biodiversity Conservation Concern (BCC) and the Biodiversity Conservation Weight (BCW) for saproxylic and non-saproxylic species. Site area and forest surface correlated positively with saproxylic richness, whereas site isolation correlated negatively with non-saproxylic richness. BCC and BCW values for saproxylic species were positively correlated with distance from the city centre. For non-saproxylic species, BCW values were negatively correlated with distance from adjacent areas. These results suggest that saproxylic beetles require large areas covered by forest, but are not strongly influenced by isolation, which is important for non-saproxylic species. Non-saproxylic tenebrionids have limited dispersal capabilities, which explains their sensitivity to isolation, but are generally eurytopic species frequently found even in the city centre. By contrast, most saproxylic species are able to fly, but are mainly found in peripheral areas with large and relatively well preserved forest fragments. Maintaining and possibly enhancing connectivity among green spaces is important for the conservation of non-saproxylic species, whereas preserving large forest surfaces, especially in peripheral areas, is needed for the conservation of saproxylic species.
File in questo prodotto:
File Dimensione Formato  
FattoriniGalassi2016JInsectConserv.pdf

non disponibili

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 825.1 kB
Formato Adobe PDF
825.1 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
173_Saproxylic tenebs in Rome_R1_SF.pdf

accesso aperto

Descrizione: Bozza finale post-referaggio
Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 166.45 kB
Formato Adobe PDF
166.45 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/105872
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 13
social impact