幼儿园自然生态活动区在生活化课程中的运用

大自然是幼儿生活成长的天地,在对幼儿的教育活动中,学校也应注意儿童在自然环境下的茁壮成长。生活化的课程符合了儿童成长的需要,让学生在亲近自然,感受自然中获得快乐,自然生态活动区的设置也是生活化课程中的必要环节,幼儿可以通过活动区感受生态之美,既符合了儿童喜欢亲近自然的心理,又可以在自然中不知不觉学到知识,使身心得到有利发展。自然生态活动区是一种新颖的教学模式,学校将其正确利用,重视每个幼儿的身心发展,定会让活动区发挥积极作用。

Comparison of locomotor behaviour between white-headed langurs Trachypithecus leucocephalus and Franois' langurs T. franoisi in Fusui,China

We studied the locomotor behaviour of white-headed langurs Trachypithecus leucocephalus and Francois＇ langurs T.francoisi to test two hypotheses： （1） these monkeys have evolved locomotor ability to support their activities on limestone hills, and （2） Francois＇ langurs have evolved more diverse locomotor skills than white-headed langurs. Data were collected from 1996 - 1998 and in 2005 in Fusui Nature Reserve, Guangxi, and showed that the two species had similar locomotor types, but Francois＇ langurs had more locomotor modes （26） than white-headed langurs （12）. Quadrupedal walking and leaping were two major types, and white-headed langurs were more arboreal than Francois＇ langurs. We suggest that, while keeping their ancestral locomotor types, the two species have evolved new types allowing them to live on limestone cliffs. Compared to white-headed langurs, Francois＇ langurs have more diverse locomotor modes that probably have allowed them to live in more habitat types. As an evolutionary outcome, Francois＇ langurs have a larger distribution range .

Brown Bear-Human Conflict Management at Brooks River, Katmai National Park and Preserve

From 1989-2009, 1,430 bear management report forms collected at Brooks Camp, KNP （Katmai National Park）, were placed in 1 of 9 categories representing bear-human interactions of concern. Using non-parametrical statistics the categories identified dominance interactions, fish-related dominance interactions, food obtained, food-related incidents, fish stolen, property damage, and use of deterrents either decreasing or exhibiting no significant trends over time. Aggressive behavior by bears towards park staff in bear management situations increased. An elevated walkway and platform at Brooks Falls and an electric fence at the campground marked significant decrease in bear-human interactions in these areas. Changes in fishing regulations in 1998 marked significant decreases in number of fish stolen. Changes in minimum distance regulations in 2003 marked no change in number of dominance interactions or bluff charges. Efforts to facilitate visitor traffic in areas around the floating bridge have marked significant increases in number of bear-human interactions. Management and policy efforts have been successful in minimizing bear-human interactions. Habituation of bears to human activity has likely contributed to both minimizing general interactions and increased aggressive bear behavior towards management staff. This study provides examples of successful adaptive management tactics for bears and humans in a visitor oriented setting.

Relative contribution of the anthropogenic forcing and natural variability to the interdecadal shift of climate during the late 1970s and 1990s

Global warming accelerated after the late1970 s and slowed down after the late 1990 s, accompanying the significant interdecadal changes in the regional climate.We hypothesized that the interdecadal changes linearly consisted of two independent components, anthropogenic forcing and natural decadal variability, which can be represented simply by the radiative forcing effect of carbon dioxide (RFCO_2) and the Pacific Decadal Oscillation(PDO), respectively. The combined effect of the RFCO_2 and PDO could explain the majority of the surface temperature changes during the late 1970 s and 1990 s, but the magnitudes of the relative contribution of the RFCO_2 and the PDO are inconsistent in different regions. For both the surface temperature and geopotential height, the RFCO_2 could induce significantly positive anomalies over almost the entire globe for these two shifts, exhibiting a larger magnitude in the mid–high latitudes and in the late 1990 s shift.The PDO could induce opposite anomalies for the two interdecadal shifts due to its phase transitions(negativepositive–negative). Furthermore, for the shift in the late 1970s, both the RFCO2(53.7 %–66.7 %) and the PDO(33.3 %–46.3 %) were important in regulating the tropical geopotential height, whereas the RFCO_2 dominated the changes in the mid-latitudes. For the western Pacific subtropical high, the RFCO2(PDO) could explain 52.3 %–62.1 %(37.9 %–47.7 %) of the change. The negative effect of the PDO counteracted most of the RFCO_2 effects for the late 1990 s shift.