2024-03-28T12:05:41Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00000465
2022-12-19T03:41:23Z
27:28:37
9:10:11
Rainfall variability may modify the effects of long-term exclosure on vegetation in Mandalgobi, Mongolia
Sasaki, Takehiro
106642
Okayasu, Tomoo
106643
Ohkuro, Toshiya
106644
Shirato, Yasuhito
106645
Jamsran, Undarmaa
106646
Takeuchi, Kazuhiko
106647
290.13
629
Arid and semi-arid rangelands
Climatic variation
Fence-line contrast
Nonequilibrium dynamics
Rangeland management
application/pdf
Starting in 2005, we examined differences in vegetation for three consecutive years across an airport fence that separated heavily grazed areas from areas in which grazing had been excluded for 24 years in Mandalgobi, Mongolia. We performed repeated-measures analysis separately on two community types (dominated by Allium polyrrhizum and Achnatherum splendens, respectively) to compare the effects of fencing and year on the cover of different plant functional types. There was a significant fence × year interaction for grass cover in the Allium type (but not the Achnatherum type), due to greater cover of grasses inside the fence only when rainfall was sufficient during the growing season. The effect of grazing exclusion on perennial forb cover was confounded by a significant fence × year interaction in both types. In 2007, perennial forbs were found outside the fence, but had almost disappeared inside the fence, resulting in this interaction. Annual forbs only had much greater cover values inside the fence than outside in 2006, also resulting in a significant fence × year interaction in both community types. This study thus suggests that the high rainfall variability in arid and semi-arid rangelands may modify the effects of long-term exclosure on vegetation.
journal article
Elsevier
2009-10
application/pdf
Journal of arid environments
10
73
949
954
AA00256892
0140-1963
https://repository.dl.itc.u-tokyo.ac.jp/record/465/files/arid_env_73_10_949.pdf
eng
info:doi/10.1016/j.jaridenv.2009.04.008