Yuan S.,Inner Mongolia Agricultural University |
Yuan S.,Key Laboratory of Prataculture and Grassland Resource |
Wu X.,Inner Mongolia Agricultural University |
Wu X.,Key Laboratory of Prataculture and Grassland Resource |
And 7 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011
The description of any system depends on spatial and temporal scale. Most researchers agree that processes that occur at different spatial and temporal scales affect ecological communities, and the scale has been one of key problems in ecological approach. Therefore, anthropogenic disturbances affecting ecological communities have to be considered in dependency of scaling - and here, empirical support is still scarce. In this study, Shannon-Wiener indices, the main characteristic parameters of desert rodent communities, were analyzed as basic information to explore their response on multi-scales under anthropogenic disturbances. The experimental objectives were to reveal change tendency of diversity with spatial scale, and to provide the bio-foundation of scaling for the research on pattern and process of animal ecology. Our research area is located on the desert landscape at the south of Alashan Desert in Inner Mongolia. This kind of landscape is fragmented due to long-term anthropogenic disturbances such as grazing, restructuring of grazing area into farmland, and building water conservancy. Data were collected in this area between 2003 and 2008. Moreover, July was chosen as focus month showing characteristic features for Alashan Desert which is caused by the species diversity variance, vegetation flourishes and the highest level in animal numbers during this time. In this term, four spatial scales with 1.25hm2, 2. 5hm2, 5hm2 and 10hm2 were selected at four disturbed habitats (forbidden grazing area, rotational grazing area, overgrazing area, and farmland) in our research area. The species number and the ratio between species in the rodent communities in different habitats were determined using trap-day method at four spatial scales. Shannon-Wiener indices as original signal were decomposed at four levels by using the method of db wavelet analysis. The results indicated that 1st species composition and annual average species richness of rodent depended on the spatial scales in each site (=10 hm2). Annual average species richness of rodent showed a rising trend with increasing spatial scales. This can be seen as function of species appearance and abundance in different habitat at same scale. 2nd a rise of rodent community diversity in sites (=10 hm2) of each habitat in desert was mainly affected by spatial scales with exception of the over-grazing areas. Here, fluctuation of communities among years occurred, but a regular cycle in original signal at four scales was determined. Therefore, time cue seems to be more affective as spatial ones for this special habitat. However, cycles were different in four disturbed habitats (rotational grazing areas: 4 years, forbidden grazing areas: 3 years, over grazing areas: 2 years, and no cycle in farmland). Even though the cycle length itself appears constant within each habitat, the amplitude per scale differs. 3rd the fluctuation amplitude of diversity of rodent communities decreased and anti-jamming ability grew up with an increase of spatial scales in the four disturbed habitats. The diversity of rodent communities in forbidden grazing areas and farmland, over-grazing areas, and rotational grazing areas were easily disturbed at the range of 0 - 2.5 hm2, 0 - 5 hm2 and 0 - 10 hm2, respectively. To conclude, wavelet analysis is an efficient method to distilling the tendency of rodent communities, diversity and signal of disturbance with spatial scale. Source
Chai X.,Inner Mongolia Agricultural University |
Chai X.,Key Laboratory of Prataculture and Grassland Resource |
Fu H.,Inner Mongolia Agricultural University |
Fu H.,Key Laboratory of Prataculture and Grassland Resource |
And 14 more authors.
Acta Theriologica Sinica | Year: 2016
Burrow-sealing behavior of Transbaikal zokor(Myospalax psilurus) is considered as a adaption to long-term underground living. Some research suggests that sealing-behavior was caused by the zokors' fear of wind and light. However this view lacked empirical evidence. A study using a 2×2 contingency-table design including 2 factors and 4 treatments was conducted in August, 2014 in a Hulunbuir pasture, Inner Mongolia to examine the burrow-sealing behavior of zokor. Sixty eight zokors were randomly divided into 4 groups, and each group was subjected to 1 treatment. Data of sealing-burrow behavior was recorded and analyzed using mutual information analysis of Shannon information and chi-square test. The results show that (1)combination of wind with light did not affect sealing behavior of Transbaikal zokor(I=7.22×10-5); (2)both wind and light had no significant influence on Transbaikal zokor sealing behavior (P>0.05). These results indicated that sealing behavior of Transbaikal zokor did not correlated with wind and light. © 2016, Science Press. All right reserved. Source