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2017 ; 6
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Pastoralism versus Agriculturalism-How Do Altered Land-Use Forms Affect the
Spread of Invasive Plants in the Degraded Mutara Rangelands of North-Eastern
Rwanda?
#MMPMID28498334
Wronski T
; Bariyanga JD
; Sun P
; Plath M
; Apio A
Plants (Basel)
2017[May]; 6
(2
): ä PMID28498334
show ga
Lantana camara L. (Verbenaceae) originates from tropical Central and South
America and has become invasive in about 50 countries. It causes problems when
invading rangelands due to its toxicity to livestock and its tendency to form
dense, monotonous thickets. Its invasiveness can partly be explained by the high
tannin content largely protecting the species from being browsed, its tolerance
to a wide range of environmental conditions, as well as its general preference
for anthropogenically disturbed habitats. The dispersal of L. camara is
facilitated by birds and other animals consuming its drupes (endozoochory), and
so both wild and domestic ungulates could contribute to its spread. In our study,
we investigated the distribution of L. camara in the Mutara rangelands of
north-eastern Rwanda, an area that faced dramatic landscape changes in recent
decades. We assessed 23 ecological factors and factors related to land-use and
conservation-political history. Major effects on the local abundance of L. camara
were found in that the relative canopy cover of L. camara was negatively
correlated with the occurrence of other shrubs (suggesting competition for space
and nutrients), while encounter rates of houses, 'living fences' (Euphorbia
tirucalli L.) and cattle tracks were positively correlated with L. camara cover.
Hence, the spread of non-native L. camara in the Mutara rangelands appears to be
linked to landscape alterations arising from the transformation of rangelands
supporting traditional pastoralist communities to other agricultural land-use
forms.