为了解河南地区鸡螨虫病中的常见感染种类,试验采集了河南10个地区阳性蛋鸡场样品,采用形态学鉴定及基于鸡皮刺螨的18 S rRNA基因序列进行PCR扩增。结果显示:新乡市、开封市、平顶山市等8个地区采集8个阳性鸡场的样品虫体呈椭圆形,前端...为了解河南地区鸡螨虫病中的常见感染种类,试验采集了河南10个地区阳性蛋鸡场样品,采用形态学鉴定及基于鸡皮刺螨的18 S rRNA基因序列进行PCR扩增。结果显示:新乡市、开封市、平顶山市等8个地区采集8个阳性鸡场的样品虫体呈椭圆形,前端有长的口器,后部稍宽,肛板呈圆三角形,符合鸡皮刺螨的形态特征;在新乡市原阳县和周口市商水县白寺镇采集2个阳性鸡场样品虫体细长,整体小于鸡皮刺螨,肛板位于腹部末端,呈泪滴状,符合林禽刺螨形态特征;河南地区流行的鸡皮刺螨与日本LC034951.1基因序列相似性达100%,林禽刺螨和法国的FN646503.1基因序列相似性达98.72%。表明鸡皮刺螨和林禽刺螨已经在河南省蛋鸡中出现感染和分布。展开更多
This study aims to assess the impact of monospecific Tectona grandis forest plantation on the soil mite abundance and diversity. To achieve these objectives, two sites situated in Ivory Coast were investigated. The fi...This study aims to assess the impact of monospecific Tectona grandis forest plantation on the soil mite abundance and diversity. To achieve these objectives, two sites situated in Ivory Coast were investigated. The first, a primary forest was characterized by a very weak human activities whereas the second, a teak plantation was characterized by a high disturbance performed during the planting. After extracting, sorted and description, 116 mite species were described in the two sites. Mite densities were lower in teak plantation and also higher in the litter and decreased to the depth in both sites. Species richness re- corded in teak plantation （52 species） was significantly lower compared to primary forest （98 species）. The same trend was ob- served for Oribatida but not for Gamasida. The lower Oribatida （5 vs. 17） and higher Oribatida （24 vs. 41） were recorded respec- tively in teak plantation and primary forest. Mite Shannon index and evenness were significantly different between sites. High Jaccard index values and the appearance of exclusive species in both habitats showed that the sites are very distinct. Total number of species recorded corresponded to 58%-63% of the total number of species estimated by ACE and Chao 1＆2 estimators, indi- cating that the sampling effort was not sufficient. Mite abundance and diversity varied depending on the characteristics of habi- tats. Chemical element （Corn, Ctot, Ntot, and SOM） values were lower in teak plantation （disturbed habitat） and significantly dif- ferent to primary forest in the topsoil. Apart from litter height, soil depth, pH and C/N ratio, others variables were strongly corre- lated to mite abundance and diversity [Current Zoology 59 （5）： 633-643, 2013].展开更多
文摘为了解河南地区鸡螨虫病中的常见感染种类,试验采集了河南10个地区阳性蛋鸡场样品,采用形态学鉴定及基于鸡皮刺螨的18 S rRNA基因序列进行PCR扩增。结果显示:新乡市、开封市、平顶山市等8个地区采集8个阳性鸡场的样品虫体呈椭圆形,前端有长的口器,后部稍宽,肛板呈圆三角形,符合鸡皮刺螨的形态特征;在新乡市原阳县和周口市商水县白寺镇采集2个阳性鸡场样品虫体细长,整体小于鸡皮刺螨,肛板位于腹部末端,呈泪滴状,符合林禽刺螨形态特征;河南地区流行的鸡皮刺螨与日本LC034951.1基因序列相似性达100%,林禽刺螨和法国的FN646503.1基因序列相似性达98.72%。表明鸡皮刺螨和林禽刺螨已经在河南省蛋鸡中出现感染和分布。
文摘This study aims to assess the impact of monospecific Tectona grandis forest plantation on the soil mite abundance and diversity. To achieve these objectives, two sites situated in Ivory Coast were investigated. The first, a primary forest was characterized by a very weak human activities whereas the second, a teak plantation was characterized by a high disturbance performed during the planting. After extracting, sorted and description, 116 mite species were described in the two sites. Mite densities were lower in teak plantation and also higher in the litter and decreased to the depth in both sites. Species richness re- corded in teak plantation （52 species） was significantly lower compared to primary forest （98 species）. The same trend was ob- served for Oribatida but not for Gamasida. The lower Oribatida （5 vs. 17） and higher Oribatida （24 vs. 41） were recorded respec- tively in teak plantation and primary forest. Mite Shannon index and evenness were significantly different between sites. High Jaccard index values and the appearance of exclusive species in both habitats showed that the sites are very distinct. Total number of species recorded corresponded to 58%-63% of the total number of species estimated by ACE and Chao 1＆2 estimators, indi- cating that the sampling effort was not sufficient. Mite abundance and diversity varied depending on the characteristics of habi- tats. Chemical element （Corn, Ctot, Ntot, and SOM） values were lower in teak plantation （disturbed habitat） and significantly dif- ferent to primary forest in the topsoil. Apart from litter height, soil depth, pH and C/N ratio, others variables were strongly corre- lated to mite abundance and diversity [Current Zoology 59 （5）： 633-643, 2013].
