Lantana camara invasion in a heterogeneous landscape: patterns of spread and correlation with changes in native vegetation

Sundaram, Bharath and Ankila Hiremath, J (2011) Lantana camara invasion in a heterogeneous landscape: patterns of spread and correlation with changes in native vegetation. Biological Invasions, 14 (6). pp. 1127-1141. ISSN 1387-3547

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The effects of invasive species on community structure remain under-investigated due to the lack of long-term data. Our objectives were to examine the correlation between Lantana camara L. invasion and native species abundance, distribution, diversity, and population structure, across different forest types in a heterogeneous landscape. We examined changes in native vegetation and L. camara between 1997 and 2008. We used existing vegetation data from 134 plots spread across the 540 km2 landscape from 1997 and re-censused these plots in 2008. We then examined the change in species richness, Shannon’s diversity, evenness, and population structure of native species from 1997 to 2008. We also examined the relationship between L. camara density and species richness, diversity, evenness, and population structure. The presence and abundance of L. camara increased dramatically from 1997 to 2008. L. camara occurred in 81% of plots by 2008, compared with only 41% of plots in 1997. Similarly, the mean density of L. camara increased almost fourfold from 1997 to 2008. This was accompanied by a change in native community structure. Species richness, diversity and evenness declined significantly in some forest types, and at the landscape scale. There were also changes in the population structure of native tree species, with reductions in the density of tree saplings, possibly due to competition with L. camara. We demonstrate the pervasive threat posed by L. camara to native vegetation at the scale of individual forest types, and at the larger landscape scale, in our study area. These changes have long-term consequences for forest structure and composition.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer Science+Business Media B.V.
Uncontrolled Keywords: Biological invasion, Lantana camara, Heterogeneous landscapes, Vegetation, Shannon’s diversity, Invasive species
Subjects: C Publications by ATREEians > K Popular Articles
Divisions: Publications by ATREEians > Popular Articles
Depositing User: Ms Kalpana S
Date Deposited: 27 Sep 2017 10:57
Last Modified: 30 Apr 2018 07:21

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