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    • Lantana camara L. (Verbenaceae) invasion along streams in a heterogeneous landscape

      Geetha Ramaswami Raman Sukumar

      Articles Volume 39 Issue 4 September 2014 pp 717-726

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jbsc/039/04/0717-0726

    • Keywords

       

      Fire history; invasive plant; Mudumalai; rainfall gradient; seasonal streams; seasonally dry tropical forest

    • Abstract

       

      Streams are periodically disturbed due to flooding, act as edges between habitats and also facilitate the dispersal of propagules, thus being potentially more vulnerable to invasions than adjoining regions. We used a landscape-wide transect-based sampling strategy and a mixed effects modelling approach to understand the effects of distance from stream, a rainfall gradient, light availability and fire history on the distribution of the invasive shrub Lantana camara L.(lantana) in the tropical dry forests of Mudumalai in southern India. The area occupied by lantana thickets and lantana stem abundance were both found to be highest closest to streams across this landscape with a rainfall gradient. There was no advantage in terms of increased abundance or area occupied by lantana when it grew closer to streams in drier areas as compared to moister areas. On an average, the area covered by lantana increased with increasing annual rainfall. Areas that experienced greater number of fires during 1989–2010 had lower lantana stem abundance irrespective of distance from streams. In this landscape, total light availability did not affect lantana abundance. Understanding the spatially variable environmental factors in a heterogeneous landscape influencing the distribution of lantana would aid in making informed management decisions at this scale.

    • Author Affiliations

       

      Geetha Ramaswami1 Raman Sukumar1 2

      1. Centre for Ecological Sciences, ndian Institute of Science, Bangalore 560 012, India
      2. Divecha Centre for Climate Change, Indian Institute of Science, Bangalore 560 012, India

    • Dates

       
      Published
      September 2014
      Manuscript received
      3 September 2013
      Accepted
      30 June 2014

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