Study On The Diversity Of Orthoptera Species In Loess Hilly-Gully Region Of North Shaanxi

In order to probe the diversity of the species of Orthoptera,the influence of different regions and different ecological restoration on the diversity of Orthoptera was studied.A variety of diversity index analysis methods were used to analyze four different types of recovery in the loess hilly region of north Shaanxi.It is artificial restoration forestland,natural restoration grassland,artificial restoration grassland,farmland.And select Baota,Wuqi,Zhidan,Wuqi,Yuyang,Dingbian,Ansai,Yanchang,Jingbian,Shenmu,Ganquan,Fuxia n,Mizhi,Suidei 13 regional studies and analysis.In addition,the diversity of the Orthoptera insects in Yan'an and Yulin were compared.With the result of this study.The total of 4670 Orthoptera insects was detected in this survey,with 8 families,28 genera and 52 species.The number of Oedipodidae is the largest,10 genera,accounting for 43.21%of the collected Orthoptera.The second is Pyrgomorphidae,1genera,accounting for 22.23%of the collected Orthoptera.The number of Arcypteridae,was 17.37%of the total number 6 genera,.Catantopidae accounted for 13.02%of the total,2 genera.Acrididae,2 genera,2.01%of the total.Pamphagidae is 4 genera,and Gomphoceridae is 1genera,accounted for 1.80%of the total and 0.06%respectively.Tetrigoidea is 2 genera,accounted for 0.30%of the Orthoptera in the loess and gully region of northern Shaanxi.The dominant species in the study area were O.infermalis Sauss.?C.abbreviatus Ikonn.?A.sinensis Bol.and C.albonemus(L.)accounted for 19.64%?11.18%?22.23%and 11.39%respectively.common species were O.dicorus asiaticus B.-Bienko?E.coerulipes(Ivan.)?E.tergestinus(Charp.)?T.annulata(Thunberg)?L.migratoria manilensis(Mey.)?C.hsiai Cheng et Tu?H.brunneriana Sauss.?A.cinerea Thunberg accounted for 1.09%?8.20%?2.87%?7.82%?1.28%?2.14%?1.80%?1.35%respectively.There are 41 species of Orthoptera insect distribution are less than one percent for the rare species.Thus it can be seen,Northern Shaanxi is rich in species,According to the analysis of Shannon-Wiener(H')of the whole northern Shaanxi region The highest is Dingbie is 5.40 MiZhi is lowest is 1.83,sense at the same time,Dingbian is the most abundant species of its Margalefbv(D_m)is 2.82,Margalefbv(D_m)the smallest is Ganquan is only 1.55.The highest of Pielou(Jsw)is Jingbian is 0.18,the lowest is Baota is 0.07,Dingbian has the highest Hurlbet(PIE),at 13.71,Ganquan is lowest is 3.09.On the contrary,the highest Spmpon(?)is Ganquan,lowest in Dingbian,to illustrate that the highest community diversity is Dingbian,the lowest community diversity is Ganquan.In Yanan There were 2885 Orthoptera insects,8 families,25 genera and 39 species,There are only three dominant species O.infermalis Sauss.?A.sinensis Bol.and C.albonemus(L.),respectively,are 16.46%,31.27%and 14.52%of the total number of Orthoptera collected in Yanan.A total of 1,785 Orthoptera insects were collected inYulin,with 8 families,24 genera and 46 species.There are two kinds of dominant species,O.infermalis Sauss.?C.abbreviatus Ikonn..The total number of Orthoptera insects in Yulin is 24.76%and 15.80%respectively.Contrast the Yanan and the diversity of Yulin region,Yulin's Shannon-wiener(H?),Margalefbv(D_m)?Pielous(Jsw),Hurlbet(PIE)are higher than Yanan,Simpson(?)is less than Yanan,so the diversity of Yulin community was obviously higher than Yanan.In four different ecological environment,artificial restoration forestland acquisition to 8 families,26 genera,48 species,1600 head.artificial restoration grassland collected 8families,24 genera,41 species,977 head,natural restoration grassland collected 8families,19 genera,35 species,1518 head,and farmland collected Orthoptera insects 7families,14 genera,22 species,512 head,In artificial restoration forestland O.infermalis Sauss.C.albonemus(L.),C.abbreviatus Ikonn.as the dominant species,accounted for18.88%,24.97%,18.50%of the total,natural recoveration grassland O.infermalis Sauss.?E.coerulipes(Ivan.)?A.sinensis Bol.as the dominant species,14.65%,10.01%,13.70%and 23.59%respectively,artificial recoveration grassland of dominant species is O.infermalis Sauss.14.23%,C.abbreviatus Ikonn.36.44%?A.sinensis Bol.13.31%locust.There are only two dominant species in farmland,O.infermalis Sauss.and A.sinensis Bol.,accounting for 31.64%and 29.88%respectively.According to Shannon-Wiener H':artificial restoration grassland>artificial restoration forestland>natural restoration grassland>farmland,according to Margalefbv Dm:artificial restoration forestland>natural restoration grassland>artificial restoration grassland>farmland;According to Hurlbert PIE analysis,natural restoration grassland>artificial restoration forestland>artificial restoration grassland>farmland,according to Simpson(?)analysis:artificial restoration forestland=natural recovery grassland<artificial restoration grassland<farmland,according to Pielou Jsw analysis shows that the farmland=natural restoration grassland>artificial restoration forestland>artificial restoration grassland.Thus the author orthoptera insects in Shaanbei region,this paper analyzed the diversity of different ecological environment situation is:the artificial restoration forestland>natural recovery grassland>restore natural restoration grassland>farmland.