检索结果-南通市图书馆

Species composition and distribution of marine nematode community in the North Taiwan Strait

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2001年第2期20卷 221-230页

作者： Cai Lizhe, Hong Huasheng, Zou Chaozhong, Fang Shaohua, Lu Xiaomei, Zhang Yueping (1. Key Laboratory of SEDC of marine Environmental Science/Environmental Science Research Center, Xiamen Universi- ty, Xiamen 361005, China 2. Department of Biology, Xiamen Key Lab. of SEDC of marine Envrn. Sc Xiamen University Xiamen 361005 China

marine free-living nematodes were investigated at 13 sampling stations divided into three transects in the northern Taiwan Strait in February 1998. One hundred species of marine nematodes belonging to 91 Genera 28 Families 3 Orders were identified and were first recorded in the northern Taiwan Strait. The dominant species were Vasostoma sp., Sabatieria sp. 1, Linhystera sp. 1, Spilophorella sp., Daptonema sp., Halalaimus sp. and Dorylaimopsis variabilis. Their main densities were all over 4 950 ind./m2. According to mean density at transects, marine nematode density decreased from coastal Weitou to off Minjiang Estuary, which was similar to polychaete distribution in northern Taiwan Strait. The selective deposit feeder (1A) was the dominant food type of marine nematodes in the northern Taiwan Strait, but non-selective deposit feeders (1B) and epigrowth feeders (2A) occupied high proportion, indicating diverse feeding types of marine nematodes in the northern Taiwan Strait. Some environmental factors such as currents are discussed.

关键词： marine nematode benthonic ecology the Taiwan Strait

Did Species and Functional Diversities of Sandy Intertidal marine nematodes Reveal Similar Response to Environmental Changes?

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2023年第2期22卷 527-540页

作者： SONG Huili MU Fanghong SUN Yan HUA Er College of marine Life Sciences Ocean University of ChinaQingdao 266003China

Free living marine nematodes were sampled from two sandy beaches in Dalian City,in December of 2015,and April,July,and October of 2016.The spatial and seasonal variations of marine nematode species diversity(based on species abundance dataset)and functional diversity(based on functional traits dataset:feeding types and life history strategies)were investigated to understand the environmental drivers and how they respond to specific environmental variations.Sediment granularity was revealed to be the main environmental factor causing spatial differences in nematode diversity indices between the two beaches.Species diversity indices,namely species number,Margalef index,Shannon-Wiener diversity index(H’),were higher in fine-grained sediments,while the functional diversity indices,including functional evenness,functional dispersion,and Rao’s quadratic entropy index(RaoQ),were higher in coarse-grained sediments.nematode species diversity indices also fluctuated with seasonal variations of temperature,dissolved oxygen,pH,salinity,and sediment chlorophyll-a within the study beaches.However,functional diversity indices did not show significant seasonal variations and exhibited weak correlation with the studied environmental variables.Overall,the functional diversity indices were negatively correlated with the species diversity indices,suggesting an inconsistent response to environmental changes.A decrease in nematode species diversity in coarse sands,accompanied by an increase in functional diversity,can be regarded as an early warning signal of environment disturbance.If more biological traits are involved in calculating functional diversity indices,it will be helpful for the future study of the internal connections of species diversity and functional diversity.

关键词： marine nematode species diversity functional diversity functional traits sandy beaches

Two new species of free-living nematodes from the East China Sea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2018年第10期37卷 148-151页

作者： SUN Yan HUANG Mian HUANG Yong College of Life Sciences Liaocheng University

Two new species of free-living marine nematodes of the genera Hopperia and Nemanema are described from the sublittoral sediment of the East China Sea. Hopperia macramphida sp. nov. is characterized by having large amphidial fovea with five turns; arcuate spicules with enlarged proximal end and central internal lamella extending one third of spicule length from proximal end; gubernaculum with bent apophyses, six papilliform precloacal supplements; and conico-cylindrical tail with swollen tip and terminal setae. Nernanema minutum sp, nov. is characterized by relatively smaller body size in the genus; large oval amphidial fovea; conical tail; slender spicules with alae and hooked proximal end; ring-like gubernaculum; and papilliform precloacal supplements with three short setae. An updated dichotomous key is provided for the 17 species of Hopperia.

关键词： Hopperia macramphida sp. nov. Nemanema minium sp. nov. marine nematode taxonomy

One new species of free-living marine nematodes (Enoplida,Anticomidae,Cephalanticoma) from the Huanghai Sea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2007年第3期26卷 84-89页

作者： HUANG Yong ZHANG Zhinan College of marine Life Sciences Ocean University of China Qingdao 266003 China College of Life Sciences Liaocheng University Liaocheng 252000 China

One new species of free-living marine nematodes Cephalanticomafilicaudata sp. nov. from the Huanghai Sea, China is described and illustrated. Cephalanticomafilicaudata sp. nov. is characterized by well developed cephalic capsule, three teeth at the anterior of oesophagus, excretory pore opens posterior to cervical setae, only two cervical setae per file, body length longer than 5 200 μm, tail long and no ventral-lateral seta between the supplement and the cloacal opening. Types are deposited in the College of marine Life Sciences, Ocean University of China.

关键词： marine nematode new species Huanghai Sea