| Cooperating with the Animal Husbandry Institute and ForestScientific Institute of Xinjiang, we investigated the rodentscommunity in Karamy Prefecture, including Karamy city, Bai Jiantan,Wu erhe, Xiao Guai and Du Shanzi from April to October in 2003. Located in the west of Junggar Basin, Karamy (84.44'~86.1'E,44.7'~46.8'N) is the first grand oil field found after 1949. Withpeople's efforts in reclaiming and operation for over half a century,the gravel desert has changed into a modern city. With the vicissitudeof environment, rodents community changes accordingly. In wildfield ,a total of 298 individuals were captured by means of plot areatrap method, that is, to place 100 2# standard traps per hectare, thedistance between two traps was 5 meters, the distance between tworoutes was 20 meters, kept 72 hours obviously; checked two timeseach day, in the morning and evening, by using self-made friedbread,carrots,fried peanuts, in a region of 36 hectares with traps. Inthe artificial environment of residents and hotels, traps were put up inevery 6 m2. 3616 traps were distributed on 70 plots, and 298 rodentswere captured. The number of captured rodents were subjected intoanalysis of normal biology measurement. According to the dominantplants and environmental feature, 70 plots were merged to 13sampled plots. We studied on composition, characteristics, similarity,diversity, evenness and dominance of the rodent communities. Wealso analyze the influence of environment, the intensity and time ofhuman being interference at the same time. No report has been seenabout studying succession of rodent community by means ofenvironment and human interference in Arid region inland. Ourresults are as follows: 4(1) 298 rodents were captured, belonging to 3 families, 10species. They were Allactaga sibirica. Allactaga elater, Merionesmeridianus, Rhombomys opimus, Meriones erythrourus, Merionestamariscinus, Microtus oeconomus, Mus musculus, Cticetulusmigratorius, Rattus norvegicus. (2) When Eucliden Distance coefficient was 0.970, the rodentscommunity structure are classified into 5 rodents communities â‘ gravel desert community with Allacga sibiric, with sparse plants andplants cover is under 20%. â‘¡ T.ramossima-H.persicum desertscommunity by Meriores meridianus,+ Rhomlomys opimus +Meriones erythrourus. Being protected in recent years, T.ramossimaand H.persicum are luxuriant and plant covers over 80%. â‘¢farmland-deserts-waste community by Meriones erythrourus +Meriones tamariscinus. With reclaimed farmland and planted forest ,a favorable habitat is provided with rodents. â‘£Farmland andplanted forest community Microtus oeconomus+ Mus musculus+Cricetulus migratorius + Meriones erythrouru. .In this area,windbreak was planted, and various of crops, fruits and grassland areinter-planted. (5) Artificial city landscape community Rattusnorvegicus,+Mus musculus+Cticetulus migratorius. This communitycharacterized by old buildings, resident areas and hotels. (3) The change of environment by human interference is themajor factor in change of rodent community. In the past 50 years,Karamy has witnessed a development of gravel desert gradually toresident area, and then to a modern city. Changing with environment,Allacgasibiric was replaced by Meriones meridianus, Rhombomysopimus, Meriones erythrouru. Then with the urbanization they werereplace by Microtus oeconomus, Cricetulus migratorius, and then by 5Rattus norvegicus, Mus musculus and Cricetulus migratorius at last. (4) Human interference exerts direct influence on changing ofrodents community structure. In 2 to 3 years, only the invasion ofperegrine species can be traced, and original species have been seenlittle change. In more than 5 years, original species began to decreaseand peregrine species increase apparently. In over 10 years, rodentscommunity structure changes gr... |
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