Nematode assemblage composition, trophic structure and biodiversity were followed over an annual cycle in a sandy beach of the Taiping Bay of Qingdao, China. Nematode assemblage in the sandy beach maintained a high ge...Nematode assemblage composition, trophic structure and biodiversity were followed over an annual cycle in a sandy beach of the Taiping Bay of Qingdao, China. Nematode assemblage in the sandy beach maintained a high genus diversity (75 genera). Mlero- laimus and Bathylaimus were the dominant genus of the nematode assemblage, accounting for 66% of the total nematode abundance. The nematodes' dominant trophic structure changed seasonally as a response to the seasonal changes in food quality. Epigrowth-feeder nematodes (2A) were the dominant trophic groups in the trophic structure with the highest abundance in spring because of phytoplankton bloom, while the feeding type ( 1 B) showed higher abundance in summer that was due to the increasing of sediment detritus after spring bloom. Furthermore, species diversity and evenness calculated on nematodes identified to the genus level displayed significant temporal changes, which was also reflected by the index of trophic diversity. According to the cluster analysis, the nematode community structure of the whole year was clearly separated into two periods (A and B). Biota-Envlron- ment matching (BIOENV) results showed that seawater temperature, sediment Chl a and grain size were responsible for the nema- tode community structure variation in spring and summer period (Period A). However, seawater/interstitial water temperature, interstitial water dissolved oxygen concentration,interstitial water salinity, and sediment Ph a a were more important in constructing the autumn and winter period (Period B) nematode community structure.展开更多
One new species of free-living marine nematodes Enoplus taipingensis sp. nov. from the rocky intertidal seaweeds in the Taiping Bay, Qingdao is described and illustrated with scanning electron microscopy observation a...One new species of free-living marine nematodes Enoplus taipingensis sp. nov. from the rocky intertidal seaweeds in the Taiping Bay, Qingdao is described and illustrated with scanning electron microscopy observation and 18S rRNA gene sequence analysis. Enoplus taipingensis is characterized by special arrangement of lateral setae on the tail, three cervical setae, distal structure on the supplement, and much longer body length with bigger De Man ratio "a". Type specimens are deposited in the College of Marine Life Science, Ocean University of China.展开更多
In the process of rapid development of urbanization and constant adjustment of urban space,urban characteristics are faced with many challenges.Taking Taiping Bay wharf area of Yantai City as an example,the paper sort...In the process of rapid development of urbanization and constant adjustment of urban space,urban characteristics are faced with many challenges.Taking Taiping Bay wharf area of Yantai City as an example,the paper sorts out the spatial construction problems from the aspects of historical development,urban texture and cultural characteristics by exploring the research process and methods of regional urban design,and put forward optimization strategies from the perspectives of urban structure optimization,street image design,industrial building transformation and cultural space establishment based on the characteristic resources of the area,thus providing experiences for future regional urban design.展开更多
基金The National Natural Science Foundation of China under contract No 40576061
文摘Nematode assemblage composition, trophic structure and biodiversity were followed over an annual cycle in a sandy beach of the Taiping Bay of Qingdao, China. Nematode assemblage in the sandy beach maintained a high genus diversity (75 genera). Mlero- laimus and Bathylaimus were the dominant genus of the nematode assemblage, accounting for 66% of the total nematode abundance. The nematodes' dominant trophic structure changed seasonally as a response to the seasonal changes in food quality. Epigrowth-feeder nematodes (2A) were the dominant trophic groups in the trophic structure with the highest abundance in spring because of phytoplankton bloom, while the feeding type ( 1 B) showed higher abundance in summer that was due to the increasing of sediment detritus after spring bloom. Furthermore, species diversity and evenness calculated on nematodes identified to the genus level displayed significant temporal changes, which was also reflected by the index of trophic diversity. According to the cluster analysis, the nematode community structure of the whole year was clearly separated into two periods (A and B). Biota-Envlron- ment matching (BIOENV) results showed that seawater temperature, sediment Chl a and grain size were responsible for the nema- tode community structure variation in spring and summer period (Period A). However, seawater/interstitial water temperature, interstitial water dissolved oxygen concentration,interstitial water salinity, and sediment Ph a a were more important in constructing the autumn and winter period (Period B) nematode community structure.
基金The National Natural Science Foundation of China under contract Nos 4073087440576061 and 41076090
文摘One new species of free-living marine nematodes Enoplus taipingensis sp. nov. from the rocky intertidal seaweeds in the Taiping Bay, Qingdao is described and illustrated with scanning electron microscopy observation and 18S rRNA gene sequence analysis. Enoplus taipingensis is characterized by special arrangement of lateral setae on the tail, three cervical setae, distal structure on the supplement, and much longer body length with bigger De Man ratio "a". Type specimens are deposited in the College of Marine Life Science, Ocean University of China.
基金Sponsored by General Project of Natural Science Foundation of Beijing (8212009)Tip-top Young Talents Training Program of High-level Teacher Team Construction Support Plan in Universities Affiliated to Beijing Municipality in 2019 (CIT&TCD201904010)Key Projects of Science and Technology Winter Olympics of National Key Research and Development Program (2020YFF0304900)。
文摘In the process of rapid development of urbanization and constant adjustment of urban space,urban characteristics are faced with many challenges.Taking Taiping Bay wharf area of Yantai City as an example,the paper sorts out the spatial construction problems from the aspects of historical development,urban texture and cultural characteristics by exploring the research process and methods of regional urban design,and put forward optimization strategies from the perspectives of urban structure optimization,street image design,industrial building transformation and cultural space establishment based on the characteristic resources of the area,thus providing experiences for future regional urban design.