Projects:

 

Detection and spatial modeling of biological invasions

• Generation and development of databases for exotic species in Chile

 

    OTHER PROJECTS:

 

  • Multiscale analysis of exotic species invasions in protected areas of south-central Chile (financed by FONDECYT 1040528).

 

  • Naturalization and invasion of introduced conifers in the Coyhaique National Reserve (financed by DIUC 202.142.013-1.0).

 

  • Distribution patterns, effects on the fire regime and impacts on the biodiversity of an introduced tree (Acacia dealbata) and shrub (Teline monspessulana) (financiado por FONDECYT 1070488).

 

  • Pinus contorta Douglas ex Louden as a model species for pine invasions in southern South America: Patterns, mechanisms and impacts. (financiado por FONDECYT 1100792)

Detection and spatial modeling of biological invasions

 

Assessment of Acacia dealbata spatial patterns (species native to Australia)


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assessment of spatial patterns

Temporal analysis

What is coming…

By means of remote sensing, i.e. aerial photographs or satellite images, we analyzed the spatial patterns of this species in two administrative regions of South-central Chile (Biobío and Araucanía) in order to understand their distribution and the factors that influence their presence.

 

The conspicuous flowering of Acacia dealbata, with an intense yellow color, takes place during the months of July and August (winter), which allows us to differentiate it from other plant covers.

 

Assessment of Acacia dealbata spatial patterns in two administrative regions of south-central Chile (Biobío and Araucanía)

 

For photographs taken in the year 2003, we analyzed 122824 ha. According to the photointerpretation, the area where Acacia dealbata is presentreached 3745 ha., considering a pixel of 30*30m as a sample unit.

 

 

In the year 2007, we analyzed 475562 ha, of which 46219 ha presented at least a 5% cover of A. dealbata in each pixel of 150*150m.

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¿What have we found?

Acacia dealbata is present in many ecosystems, but it is associated with roads…

 

 

…And strongly associated with rivers.

 

 

Temporal Analysis ....................................................................................................................................................................................................Up.

 

In order to assess the temporal variation of the presence of Acacia dealbata, we selected 10 zones of the Bíobio Region in the years 2003 and 2007.

 

 

This assessment was performed using photointerpretation, with a grid of 10*10m.

 

 

 

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What is coming…......................................................................................................................................................................................................Up.

 

With the objective of analyzing the behavior of Acacia dealbata at a regional scale, we are determining “training points” (zones that allow us to identify the coverage as A. dealbata) for a later classification of coverage in satellite images

 

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