Effects of increasing levels of pharmaceutical penicillin G contamination on structure of free living nematode communities in experimental microcosms

The temporal variation of nematode communities in eight mouth stations of the Mekong River system was investigated in order to compare the change between the dry and the wet season. The nematode data was analysed by multivariate techniques such as SIMPROF, MDS, ANOSIM and SIMPER in the software PRIMER v.6 – PERMANOVA. Our results showed that average dissimilarity between seasons of the nematode communities in each station was high. Seasonal factor did not affect strongly their distribution pattern. Dominant genera Desmodora and Oncholaimellus usually occurred in the sand stations and Parodontophora and Halalaimus were characteristic for the silty group in both seasons. The spatial variations in this estuarine area have an influence that is larger than seasonal factors. Sự phân bố theo thời gian của quần xã tuyến trùng sống tự do vùng cửa sông Mekong được nghiên cứu nhằm đánh giá sự khác biệt của chúng trong mùa mưa và mùa khô. Dữ liệu của tuyến trùng được xử lý và phân tích đa biến như SIMPROF, MDS, ANOSIM và SIMPER bằng phần mềm PRIMER v.6 – PERMANOVA. Kết quả nghiên cứu cho thấy sự khác biệt theo mùa trong quần xã tuyến trùng tại mỗi điểm là khá lớn nhưng yếu tố mùa không ảnh hưởng gì tới mô hình phân bố của chúng. Một số giống ưu thế trong nền đáy cát như Desmodora and Oncholaimellus trong khi đó Parodontophora và Halalaimus thích nghi nền bùn sét phù sa vẫn hiễn diện trong cả 2 mùa. Kết quả nghiên cứu cũng cho thấy sự biến động trong không gian ở đây lớn hơn sự biến động về mùa vụ.

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Intertidal meiofauna of a high-latitude glacial Arctic fjord (Kongsfjorden, Svalbard) with emphasis on the structure of free-living nematode communities

Polar Biology ◽

10.1007/s00300-005-0022-4 ◽

2005 ◽

Vol 28 (12) ◽

pp. 940-950 ◽

Cited By ~ 20

Author(s):

Barbara Urban-Malinga ◽

Jozef Wiktor ◽

Aleksandra Jabłońska ◽

Tom Moens

Keyword(s):

High Latitude ◽

Free Living ◽

Nematode Communities ◽

Free Living Nematode ◽

Arctic Fjord

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Effect of heavy metals on soil nematode communities in the vicinity of a metallurgical plant in North Slovakia

Helminthologia ◽

10.1515/helmin-2015-0040 ◽

2015 ◽

Vol 52 (3) ◽

pp. 252-260 ◽

Cited By ~ 2

Author(s):

P. Šalamún ◽

V. Hanzelová ◽

D. Miklisová ◽

T. Brázová

Keyword(s):

Stress Responses ◽

Industrial Pollution ◽

Pollution Source ◽

Soil Nematode ◽

Free Living ◽

Nematode Communities ◽

Generic Composition ◽

Free Living Nematode ◽

Nematode Diversity ◽

Remote Sites

Abstract The effect of industrial pollution from chromium ferroalloys production on soil free-living nematode assemblages, c-p groups and generic composition was investigated along 7-km transect. From trace elements (Cr, Cu, Ni and Pb), only chromium exceeded the thresholds for uncontaminated soils (10 mg.kg-1) near the pollution source. In contrast mobilizable fraction of Cr has increased with the distance from the pollution source and was found to be positively correlated with Cox, soil pH, and moisture. Generic richness (nematode diversity) was also higher at remote sites. The low contamination has no significant impact on the nematode communities as illustrated by the c-p groups composition and balanced community structure. Widely applied ecological indices SI and EI also proved maturing ecosystem without any significant stress responses

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