scholarly journals Caracterización estructural y funcional de los macroinvertebrados en los bañados de desborde fluvial del área pampeana

2020 ◽  
pp. 015
Author(s):  
Alberto Rodrigues Capítulo ◽  
Bianca Cortese ◽  
Laura Armendáriz ◽  
Augusto Siri ◽  
Paula Altieri ◽  
...  
Keyword(s):  
Limnodrilus Hoffmeisteri

En este estudio se caracteriza el ensamble de macroinvertebrados en bañados de desborde fluvial de cuatro arroyos pampeanos bonaerenses con diferentes actividades en el uso del suelo (intensa horticultura y ganadería extensiva) desde un punto de vista estructural y funcional. Se aplicaron índices bióticos, ecológicos, análisis multivariados y se analizaron los ensambles de oligoquetos y quironómidos. Los mayores valores diversidad y riqueza taxonómica de macroinvertebrados correspondieron al bañado de Chubichaminí (H ́= 1,9; S=19,25). Este arroyo presentó aguas ligeramente poluídas, siendo aceptable en términos de calidad del agua. El análisis multivariado ordenó a los sitios de los bañados Del Gato y Carnaval con la mayor carga de nutrientes vinculados a los taxa más tolerantes como los dípteros Stratiomyidae, Ephydridae y nematodes, oligoquetos y gasterópodos Physidae. La mayor diversidad y riqueza de oligoquetos se registró en los bañados del Cajaravillas y Chubichaminí en los meses cálidos y las diferencias encontradas se debieron principalmente a Limnodrilus hoffmeisteri Claparède, 1862. El ensamble de quironómidos estuvo conformado por 24 taxones pertenecientes a Chironominae, Orthocladiinae y Tanypodinae. El género Chironomus Meigen fue más abundante en el A° Del Gato, correspondiendo principalmente a C. calligraphus Goeldi, asociado a ambientes con evidente impacto antrópico. Los sitios estudiados mostraron diferentes patrones en la proporción de grupos funcionales alimentarios sin una clara relación con el uso del suelo. Los índices aplicados en el ensamble de macroinvertebrados resultaron efectivos para evaluar el estado ecológico de los bañados analizados.

Toxicity and bioaccumulation of copper in Limnodrilus hoffmeisteri under different pH values: Impacts of perfluorooctane sulfonate

2016 ◽  
Vol 305 ◽  
pp. 219-228 ◽  
Author(s):  
Lingjun Meng ◽  
Shaogui Yang ◽  
Mingbao Feng ◽  
Ruijuan Qu ◽  
Yong Li ◽  
...  
Keyword(s):  
Perfluorooctane Sulfonate ◽  
Ph Values ◽  
Limnodrilus Hoffmeisteri

scholarly journals Checklist of Aquatic Oligochaetes Species in Tigris–Euphrates River basin

2014 ◽  
Vol 11 (3) ◽  
pp. 1397-1404 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Single Species ◽  
Abundant Species ◽  
Tubifex Tubifex ◽  
Euphrates River ◽  
Tigris River ◽  
Limnodrilus Hoffmeisteri ◽  
Frequent Species ◽  
Aquatic Oligochaetes ◽  
Stylaria Lacustris ◽  
Tubificid Worms

A total of 60 species of aquatic oligochaetes were identified in different sites within Tigris-Euphrates basin / Iraq, including River Tigris, River Euphrates, Southern marshes ( Al-Haweiza , Al-Hammar and Al-Chebaiesh ) , Shutt Al-Germa, and Shatt Al-Arab. In River Euphrates 39 species were identified, 40 species from River Tigris and 32 species from Shatt-Al-Arab and southern marshes.The identified species were classified as four species of Family Aeolosomatidae, 54 species of Naididae ( 31 Naidinae , 8 Pristininae and 15 Tubificid worms), one species of each of Lumbriculidae ( Lumbriculus variegates ) and Lumbricidae ( Eiseiella tetraedra). Among Aeolosomatidae , Aelosoma aquaternarium, A. Liedyi, A. variegatum and A. hemprichi, in which, A. variegatum was the most frequent species, found in Euphrates river. Naidinae community were represented by five species of genus Chaetogaster, two species of each of Paranais, Slavina, & Stylaria, four species of Allonais , and seven species of each of Dero and Nais, in addition to Stephensoniana trivandrana, Specaria josinae and Ophidonais serpentina. Nais variabilis was the most abundant and frequent species in River Tigris while Stylaria lacustris & Ophidonais serpentina are abundant in River Euphrates . Species of Pristininae were representative by four species of genus Pristina and three species of genus pristinella, among them Priatina longiseta is the most abundant species.Tubificid worms, Branchuira sowerbyi and Limnodrilus hoffmeisteri were the most frequent and abundant species in the surface sediments of Iraqi waters. Beside L. hoffmeisteri , other five species of Limnodrilus, two species of Potomothrix, and a single species of Tubifex tubifex , Embolocephalus velutinus, Aulodrilus piguetia, Psammoryctides moravicus and Rhyacodrilus coccineus were recorded.

scholarly journals On the function of haemoglobin in limnic oligochaeta

1951 ◽  
Vol 16 (16) ◽  
pp. 289
Author(s):  
E. G. Mendes ◽  
M. D. Pérez González ◽  
M. L. Coutinho
Keyword(s):  
Limnodrilus Hoffmeisteri

O consumo de oxigênio de Limnodrilus hoffmeisteri foi medido a 25°C, em água em equilíbrio com atmosferas contendo 21, 15, 10, 5, 2.5 e 1% de oxigênio, com (no escuro) e sem adição de monóxido de carbono em quantidade suficiente para saturar a hemoglobina do sangue. O consumo normal médio de oxigênio de Limnodrilus, a 25°C, é 1,02 mm3/mg (seco)/hora.

scholarly journals Environmental factors and benthic Oligochaeta (Annelida, Clitellata) assemblages in a stretch of the Upper São Francisco River (Minas Gerais State, Brazil)

2011 ◽  
Vol 71 (2) ◽  
pp. 437-446 ◽  
Author(s):  
AL Suriani-Affonso ◽  
RS França ◽  
M. Marchese ◽  
O. Rocha
Keyword(s):  
Size Composition ◽  
Abundant Species ◽  
Nitrogen And Phosphorus ◽  
Sao Francisco River ◽  
Limnodrilus Hoffmeisteri ◽  
São Francisco River ◽  
Data Variability ◽  
Numerical Abundance ◽  
Minas Gerais State ◽  
Dry Seasons

The Oligochaeta forms an important part of the macroinvertebrates inhabiting sediments of lotic ecosystems. It has an important role in the cycling of matter and energy transfer in these environments. The aim of this study is to analyse limnological variables, their influence on the structure and diversity of benthic oligochaete taxocenosis in a stretch of the Upper São Francisco River and its tributary the Piumhi River. Samples were taken in two climatic periods, the dry season in October 2006 and 2007 and the rainy season in March 2007 and 2008 at three points along the Piumhi River and six points along the São Francisco River. The sediment of the São Francisco consisted predominantly of sand and clay, whereas the sediment of the Piumhi was mainly sandy. Six species of oligochaete occurred in the Piumhi River while seven were found in the São Francisco. Of these, Pristina synclites Stephenson, 1925, Pristina americana Cernosvitov, 1937, Bothrioneurum sp. Stolc, 1888 and Limnodrilus hoffmeisteri Claparede, 1862 occurred in the sediment of both rivers. L. hoffmeisteri showed the highest numerical abundance in the Piumhi River and Brinkhurstia americana (Brinkhurst, 1964) and L. neotropicus Cernosvitov, 1939 were the most abundant species in the São Francisco River. The highest oligochaete density was recorded in the Piumhi during the dry seasons. Canonical correspondence analyses (CCA) of sediment characteristics explained most of the data variability and the association of the presence of oligochaete species in the Piumhi and São Francisco Rivers with the limnological variables (grain size composition and total nitrogen and phosphorus concentrations in the sediment).

scholarly journals The fauna and benthic communities of invertebrates of the Ural river within the Atuar steppe (Orenburg state nature reserve)

2021 ◽  
pp. 275-288
Author(s):  
Tat'yana S. Krayneva ◽  
◽  
Nikolaj N. Pan'kov ◽  
Keyword(s):  
Nature Reserve ◽  
Benthic Communities ◽  
Water Bodies ◽  
Chironomid Larvae ◽  
Sandy Gravel ◽  
Limnodrilus Hoffmeisteri ◽  
Bithynia Tentaculata ◽  
State Nature Reserve ◽  
Bristle Worms ◽  
State Nature

There are 70 species and forms in the composition of zoobenthos of the river Ural and in water bodies of its floodplain have been identified. Mayflies and chironomids are represented in various ways (13 and 12 species and forms, respectively). Caddisflies (10) and stone flies (7) are rich in species. Among other invertebrates, bivalves (6) and gastropods (5), small-bristled worms (5), non-chironomid dipterans (4), leeches, crustaceans and dragonflies, bugs and beetles were recorded. On sandy-gravel-pebble soils is formed a zoobenthocenosis, dominated by the mayflies Ephoron virgo. They are accompanied by Chironomidae larvae. The biomass of the community varies between of 29.32–31.68 g/m2 with an abundance of 18.1–32.44 thousand ind./m2. In the coastal of the channel is formed a pelophilic zoobenthocenosis, the basis of it abundance and biomass are constituted by the small-bristle worms Limnodrilus hoffmeisteri. They are accompanied by mollusks Stagnicola palustris and mysids P. lacustris. The biomass of the pelophilic community is 13.68 g/m2 with a population of 15.45 thousand ind./m2. In floodplain water bodies are formed pelophilic zoobenthocenoses, the biomass of which varies in the range of 19.2–34.24 g/m2 with an abundance of 5.64–30.04 thousand ind./m2. Chironomid larvae constitute the base of the population. The biomass is composed by dragonflies Libellula sp., Chironomids, and mollusks Bithynia tentaculata.

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