遭遇 H 先生叶东强给人的第一印象,是健谈。不管什么话题,从政治经济到企业管理,从医学到法律,从营养学到人体保健,看相把脉,都有自己的一番见解。如果遇上他认为要全面阐述的问题,那种执着、认真的态度,还会令人有点吃不消。从香港到...遭遇 H 先生叶东强给人的第一印象,是健谈。不管什么话题,从政治经济到企业管理,从医学到法律,从营养学到人体保健,看相把脉,都有自己的一番见解。如果遇上他认为要全面阐述的问题,那种执着、认真的态度,还会令人有点吃不消。从香港到内地某企业任总经理的 H 先生,就着实"领教"了一回。那是在一次晚宴上,"主角"是一位女领导。H展开更多
Two species,Sora barapanica Merkl,2019 and Sora marmoreipennis Merkl,2019,are newly recorded from China.Sora mimica(Pic,1912)and Sora thibetana(Pic,1914)are redescribed with illustrations of type specimens provided fo...Two species,Sora barapanica Merkl,2019 and Sora marmoreipennis Merkl,2019,are newly recorded from China.Sora mimica(Pic,1912)and Sora thibetana(Pic,1914)are redescribed with illustrations of type specimens provided for the first time.Sora mimica var.testaceipennis(Pic,1912)is proposed as a synonym of Sora mimica.展开更多
Leaf litter decomposition of liaotong oak (Quercus liaotungensis Koize) under temperate, subtropical and tropical forests was examined using a litter bag technique. Decomposition rates and release dynamics of nutrient...Leaf litter decomposition of liaotong oak (Quercus liaotungensis Koize) under temperate, subtropical and tropical forests was examined using a litter bag technique. Decomposition rates and release dynamics of nutrients Ca, Cu, Fe, K, Mg, Mn and P were observed separately at all three sites for I to 2 a periods. The leaf litter mass loss of liaotong oak was simulated with Olson's exponential model. Significant differences of leaf litter mass loss were found in forests of all three climate zones. Litter decomposition was accelerated with the increase of both annual mean precipitation and temperature. Our results agreed with other studies demonstrating that litter decomposition processes were greatly affected not only by soil organisms (including soil fauna and microorganisms), but also by chemical factors. These chemical factors were important for controlling the release of nutrients, especially elements of Fe and Mn. We also found that Fe and Mn content increased in semi-decayed leaf litter as litter mass decreased. This result was presumably due to chelating process which accumulated soil Fe and Mn ions into the decomposing litter. In conclusion, our study allowed us to determine the classification of the characteristics of different nutrient release patterns.展开更多
In the present paper re descriptions are provided for the Oriental leafhopper genus Kunasia Distant and its type species, K. nivosa Distant. A new species, Kunasia carina sp. nov. from Malaysia is describ...In the present paper re descriptions are provided for the Oriental leafhopper genus Kunasia Distant and its type species, K. nivosa Distant. A new species, Kunasia carina sp. nov. from Malaysia is described and the genus is placed in Stegelytrinae, new placement.展开更多
The study area lies in the Dadu River drainage area in upstream Yangtze River.The spatial distribution of subalpine coniferous forests in 1989 and 2009 was extracted by means of a combined method of object orientation...The study area lies in the Dadu River drainage area in upstream Yangtze River.The spatial distribution of subalpine coniferous forests in 1989 and 2009 was extracted by means of a combined method of object orientation and visual interpretation,and then the overlaying analysis of these data was conducted.The type and spatial location of succession were discovered and served as the sample of dependant variable.Meanwhile,supported by GIS technology and based on DEM and thematic data,the eight variables including altitude,slope,sin and cosin of aspect,curvity of land surface,and distance to residential area,cultivated land and road were extracted served as the sample of spatial succession of subalpine coniferous forests to fit Logistic Regression,and then the contribution of each independent variable as well as the spatial property of the occurrence probability of succession was calculated.The results suggested that,during the succession of subalpine coniferous forests to meadow,the closer to the residential area and cultivated land,the greater the contribution to succession is.In particular,when the distance to the residential area decreases by one unit,the probability for its conversion to meadow will be increased by 1.15 times.During the succession of subalpine coniferous forests to deciduous-broadleaved shrubs,the sin of aspect and distance to residential area contribute more,and the probability of succession increases with increasing degree of northwardness,i.e.when the degree of northwardness increases by one unit,the probability will be increased by 1.2 times.The quantitative analysis of spatial succession property of subalpine coniferous forests will supply scientific basis to the protection and restoration of subalpine coniferous forests.展开更多
The spatial distribution and population dynamics of Quercus liaotungensis Koidz., Fraxinus rhynchophylla Hance and Acer mono Maxim. were studied in three warm temperate deciduous forests in Dongling Mountain, Beijing....The spatial distribution and population dynamics of Quercus liaotungensis Koidz., Fraxinus rhynchophylla Hance and Acer mono Maxim. were studied in three warm temperate deciduous forests in Dongling Mountain, Beijing. Clumped distributions appeared in most seedlings (≤0.4 m), short saplings (0.4-1 m) and tall saplings (1-2 m). Random distributions appeared in adults of Q. liaotungensis in Plot 1, F. rhynchophylla in Plot 3. The LSD method was used to discern the differences of different aged population. The class distribution of Q. liaotungensis was nearly a reverse-J shape for Plot 1 and Plot 3, suggesting that the population regenerates continuously. The age-structures of F. rhynchophylla and A. mono in Plot 1 and the test results indicated that they would increase continuously. In Plot 2, the class distribution and the test results showed that all populations would not regenerate continuously.展开更多
文摘遭遇 H 先生叶东强给人的第一印象,是健谈。不管什么话题,从政治经济到企业管理,从医学到法律,从营养学到人体保健,看相把脉,都有自己的一番见解。如果遇上他认为要全面阐述的问题,那种执着、认真的态度,还会令人有点吃不消。从香港到内地某企业任总经理的 H 先生,就着实"领教"了一回。那是在一次晚宴上,"主角"是一位女领导。H
基金supported by the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202300537)the Doctor of Science Program funded by Chongqing Normal University(21XLB043).
文摘Two species,Sora barapanica Merkl,2019 and Sora marmoreipennis Merkl,2019,are newly recorded from China.Sora mimica(Pic,1912)and Sora thibetana(Pic,1914)are redescribed with illustrations of type specimens provided for the first time.Sora mimica var.testaceipennis(Pic,1912)is proposed as a synonym of Sora mimica.
文摘Leaf litter decomposition of liaotong oak (Quercus liaotungensis Koize) under temperate, subtropical and tropical forests was examined using a litter bag technique. Decomposition rates and release dynamics of nutrients Ca, Cu, Fe, K, Mg, Mn and P were observed separately at all three sites for I to 2 a periods. The leaf litter mass loss of liaotong oak was simulated with Olson's exponential model. Significant differences of leaf litter mass loss were found in forests of all three climate zones. Litter decomposition was accelerated with the increase of both annual mean precipitation and temperature. Our results agreed with other studies demonstrating that litter decomposition processes were greatly affected not only by soil organisms (including soil fauna and microorganisms), but also by chemical factors. These chemical factors were important for controlling the release of nutrients, especially elements of Fe and Mn. We also found that Fe and Mn content increased in semi-decayed leaf litter as litter mass decreased. This result was presumably due to chelating process which accumulated soil Fe and Mn ions into the decomposing litter. In conclusion, our study allowed us to determine the classification of the characteristics of different nutrient release patterns.
基金This study is supported by the National Science Foundation of China( 39870 1 1 3)
文摘In the present paper re descriptions are provided for the Oriental leafhopper genus Kunasia Distant and its type species, K. nivosa Distant. A new species, Kunasia carina sp. nov. from Malaysia is described and the genus is placed in Stegelytrinae, new placement.
基金Supported by National Natural Science Foundation of China(40901057)Key Project of Chinese National Programs for Fundamental Research and Development(2010CB951704)~~
文摘The study area lies in the Dadu River drainage area in upstream Yangtze River.The spatial distribution of subalpine coniferous forests in 1989 and 2009 was extracted by means of a combined method of object orientation and visual interpretation,and then the overlaying analysis of these data was conducted.The type and spatial location of succession were discovered and served as the sample of dependant variable.Meanwhile,supported by GIS technology and based on DEM and thematic data,the eight variables including altitude,slope,sin and cosin of aspect,curvity of land surface,and distance to residential area,cultivated land and road were extracted served as the sample of spatial succession of subalpine coniferous forests to fit Logistic Regression,and then the contribution of each independent variable as well as the spatial property of the occurrence probability of succession was calculated.The results suggested that,during the succession of subalpine coniferous forests to meadow,the closer to the residential area and cultivated land,the greater the contribution to succession is.In particular,when the distance to the residential area decreases by one unit,the probability for its conversion to meadow will be increased by 1.15 times.During the succession of subalpine coniferous forests to deciduous-broadleaved shrubs,the sin of aspect and distance to residential area contribute more,and the probability of succession increases with increasing degree of northwardness,i.e.when the degree of northwardness increases by one unit,the probability will be increased by 1.2 times.The quantitative analysis of spatial succession property of subalpine coniferous forests will supply scientific basis to the protection and restoration of subalpine coniferous forests.
文摘The spatial distribution and population dynamics of Quercus liaotungensis Koidz., Fraxinus rhynchophylla Hance and Acer mono Maxim. were studied in three warm temperate deciduous forests in Dongling Mountain, Beijing. Clumped distributions appeared in most seedlings (≤0.4 m), short saplings (0.4-1 m) and tall saplings (1-2 m). Random distributions appeared in adults of Q. liaotungensis in Plot 1, F. rhynchophylla in Plot 3. The LSD method was used to discern the differences of different aged population. The class distribution of Q. liaotungensis was nearly a reverse-J shape for Plot 1 and Plot 3, suggesting that the population regenerates continuously. The age-structures of F. rhynchophylla and A. mono in Plot 1 and the test results indicated that they would increase continuously. In Plot 2, the class distribution and the test results showed that all populations would not regenerate continuously.
