^p^p^pCentre;
of;
Excellence;
for;
Ecohydrology,;
School;
of;
Natural;
Resources,;
Edith;
Cowan;
University,;
Joondalup,;
WA;
6027;
and;
School;
of;
Plant;
Biology,;
University;
of;
Western;
Australia,;
Crawley,;
WA;
6009,;
Australia;
^pof;
Earth;
and;
Environment,;
University;
of;
Westem;
Australia,;
Crawley,;
WA;
6009,;
AustraliaE-mail:;
xhhe@caas.ac.cn;
xinhua.he@uwa.edu.au;