Another Interesting paper.

Pankaj Oudhia
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Weeds and the monitoring of biodiversity in Australian rangelands
A. C. GRICE

Abstract Monitoring the biodiversity of Australian rangelands has
been identified as a means of informing policy and supporting funding
decisions in relation to the conservation of biodiversity. Australian
rangelands are subject to invasion by alien plants that have the
potential to have major impacts on ecosystem function and
biodiversity, although there has been little quantitative
documentation of these effects. Research is needed to improve our
understanding of how and to what extent alien plants affect
biodiversity in Australian rangelands so that this relationship can
be considered when developing and implementing programmes to monitor
biodiversity. It is also important to consolidate existing efforts to
quantify the extent of alien plant invasions and monitor their
progress, thus documenting a process that threatens biodiversity.
Information on the presence and abundance of alien plant species
should be considered for inclusion as a component of biodiversity
monitoring programmes that are undertaken. Monitoring components of
biodiversity can itself provide a basis for evaluating weed
management strategies.

http://www.blackwell-synergy.com/links/doi/10.1111/j.1442-
9993.2004.01364.x