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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2017

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Comparing pixel and object based approaches to map an understorey invasive shrub in tropical mixed forests

Anno di pubblicazione: 2017

Formato: Elettronico

Autori: Madhura Niphadkar (1), Harini Nagendra (2), Cristina Tarantino (3), Maria Adamo(4), Palma Blonda (3)

Affiliazioni autori: (1) Ashoka Trust for Research in Ecology and the Environment, India (2) School of Development, Azim Premji University, India (3) Institute of Atmospheric Pollution Research (IIA), National Research Council (CNR), Italy (4) Institute of Intelligent Systems for Automation (ISSIA), National Research Council (CNR), Italy

Autori CNR:

  • MARIA ADAMO
  • PALMA NICOLETTA BLONDA
  • CRISTINA TARANTINO

Lingua: inglese

Abstract: The establishment of invasive alien species in varied habitats across the world is now recognized as a genuine threat to the preservation of biodiversity. Specifically, plant invasions in understory tropical forests are detrimental to the persistence of healthy ecosystems. Monitoring such invasions using Very High Resolution (VHR) satellite remote sensing has been shown to be valuable in designing management interventions for conservation of native habitats. Object-based classification methods are very helpful in identifying invasive plants in various habitats, by their inherent nature of imitating the human . However, these methods have not been tested adequately in dense tropical mixed forests where invasion occurs in the understorey. This study compares a pixel-based and object-based classification method for mapping the understorey invasive shrub Lantana camara (Lantana) in a tropical mixed forest habitat in the Western Ghats biodiversity hotspot in India. Overall, a hierarchical approach of mapping top canopy at first, and then further processing for the understorey shrub, using measures such as texture and vegetation indices proved effective in separating out Lantana from other cover types. In the first method, we implement a simple parametric supervised classification for mapping cover types, and then process within these types for Lantana delineation. In the second method, we use an object-based segmentation algorithm to map cover types, and then perform further processing for separating Lantana. The ability of the object-based approach to delineate structurally distinct objects with characteristic spectral and spatial characteristics of their own, as well as with reference to their surroundings, allows for much flexibility in identifying invasive understorey shrubs among the complex vegetation of the tropical forest. Conservation practices in tropical mixed forests can benefit greatly by adopting methods which use high resolution remotely sensed data and advanced techniques to monitor the patterns and effective functioning of native ecosystems by periodically mapping disturbances such as invasion.

Lingua abstract: inglese

Rivista:

Frontiers in plant science Frontiers Research Foundation,
Paese di pubblicazione: Svizzera
Lingua: inglese
ISSN: 1664-462X

DOI: 10.3389/fpls.2017.00892

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • remote sensing
  • Lantana camara
  • object-based
  • tropical
  • Understorey shrub
  • Hierarchical
  • Western Ghats

Data di accettazione: 12/05/2017

Strutture CNR:

 
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