摘要
大针茅草原蝗虫的常见种类有１１种，其中７种属蝗亚科。毛足棒角蝗、短星翅蝗和鼓翅皱膝蝗、狭翅雏蝗分别构成蝗虫早、中、晚期的优势种类。蝗虫群落的物种丰富度及多样性指数在蝗虫的发生中期较高。蝗虫的次级生产力为５．１８ｋＪ／ｍ２·ａ，是地上净初级生产力的０．１８％。通过整个蝗虫群落的能流为１６．８４ｋＪ／ｍ２·ａ。不同的蝗虫种群在生态系统能流中具有不同的贡献，其中毛足棒角蝗在整个蝗虫群落的能流中起着十分重要的作用，通过它的能流占总能流的４０．２％。从季节上看，在蝗虫发生的后早期和中期，通过蝗虫的能量较多。大针茅草原蝗虫种群的生产量和呼吸量之比在３０％～７０％间，平均为４４．８％，蝗虫的生长效率（Ｐ／Ａ）在２３％～４１％间，平均为３０．９％。
There are 11 species of grasshoppers (Acridoidae) on the Stipa grandis grassland in Xiling Gol River region in Inner Mongolia. Dasyhippus barbipes (F. W.), Calliptamus abbreviatus (Inkonn) and A ngaracris barabensis (Pall), Chorthippus. dubius (Zub.)are the early , middle , late dominant species, respectively. The richness and diversity index is high in the middle periods of grasshoppers′ emergence. The net production of the grasshoppers is 5.18 kJ·m -2 ·a -1 that accounts for 0.18% of the above ground primary production. The energy flow through the grasshoppers is 16.84 kJ·m -2 ·a -1 . The contributions to total energy flow by different grasshoppers are different with the highest(40.2%)by Dasyhippus barbipes. More energy passed through the grasshoppers during the late early and medium periods of their emergence. There exists differences in ecological efficiencies among grasshopper species: P/R= 30%～70% with mean of 44.8%, growth efficiencies( P/A )=23%～41% with mean of 30.9%.
出处
《生态学报》
CAS
CSCD
北大核心
1997年第1期18-22,共5页
Acta Ecologica Sinica
基金
国家自然科学基金
中国科学院内蒙古草原生态系统定位站基金
关键词
草原生态学
大针茅草原
蝗虫
群落结构
能流
Stipa grandis grassland, grasshoppers, relative abundance, community structure, energy flow.
