Quantifying the network connectivity of landscape mosaics: a graph-theoretical approach

Ricotta, C. and Stanisci, A. and Avena, G. C. and Blasi, C. (2000) Quantifying the network connectivity of landscape mosaics: a graph-theoretical approach. Community Ecology, 1 (1). pp. 89-94. ISSN 1585-8553

Preview

Text comec.1.2000.1.12.pdf Download (205kB) | Preview

Abstract

Connectivity determines a large number of ecological functions of the landscape, including seed and animal dispersal, gene flow and disturbance propagation, and is therefore a key to understanding fluxes of matter and energy within land mosaics. Several approaches to quantifying landscape connectivity are possible. Among these, graph theory may be used to represent a landscape as a series of interconnected patches, where flows occur as a result of structural and/or functional patch connectivity. Within this context, we propose the use of a graph-theoretic index (i.e., the Harary index) as a measure of landscape connectivity. Results derived from the analysis of the vegetation map of Palmarola (central Italy) show that, from a statistical and ecological viewpoint, the Harary index may be a better measure of landscape connectivity than more traditional indices derived from transportation geography.

Actions (login required)

Edit Item