NEW DATA REGARDING THE PRESENCE OF TWO INSECT LARVAE SPECIES - GOMPHUS (STYLURUS) FLAVIPES (ODONATA) AND PALINGENIA LONGICAUDA (EPHEMEROPTERA) - IN THE LOWER SECTOR OF THE DANUBE RIVER

The paper presents data regarding two larvae insect populations - Gomphus (Stylurus) flavipes (Charpentier, 1825) and Palingenia longicauda (Olivier, 1791), inhabiting in the communities existing at the water/sediment interface along the Danube River. The dragonfly Gomphus (Stylurus) flavipes (Charp...

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Bibliographic Details
Published inGeo-eco-marina no. 25; pp. 253 - 264
Main Authors Pavel, Ana Bianca, Menabit, Selma, Školka, Marius, Lupascu, Naliana, Pop, Ioan - Cornel, Opreanu, Gicu, Stanescu, Ion, Scrieciu, Albert
Format Journal Article
LanguageEnglish
Published Bucharest Geo-Eco-Marina 01.01.2019
Subjects
20th century
Aquatic insects
Ecological conditions
Endangered & extinct species
Endangered species
Environmental regulations
Fluvial sediments
Gomphus
Indicator organisms
Indicator species
Insect larvae
Insects
Larvae
Life cycle
Life cycles
Palingenia longicauda
Profiles
Rare species
Rivers
Sediments
Stylurus
Substrates
Threatened species
Water pollution
Water quality
Wildlife conservation
Czech Republic
Netherlands
Romania
Hungary
Danube River
Europe
Ukraine
Poland
Slovakia
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Summary:The paper presents data regarding two larvae insect populations - Gomphus (Stylurus) flavipes (Charpentier, 1825) and Palingenia longicauda (Olivier, 1791), inhabiting in the communities existing at the water/sediment interface along the Danube River. The dragonfly Gomphus (Stylurus) flavipes (Charpentier, 1825) is one of the most important indicator species, listed in Annex IV of the EU Habitats Directive (EU Directive 92/43/EEC) and included in the IUCN Red List of Threatened Species, 2014. This species of dragonfly has become an endangered species in most Western European countries due to water pollution and river regulation. The other important larvae species, mayfly Palingenia longicauda (Olivier, 1791), listed in Annex II of the Bern Convention, is considered critically endangered in Europe. Both require a specific habitat conditions in order to complete their life cycle. During the spring campaigns conducted during 2012-2015, the presence of the two species was reported in 26 profiles from the Lower Danube Sector, Gomphus (Stylurus) flavipes in 18 profiles, and Palingenia longicauda in 10 profiles. The most abundant occurrences were recorded in 2015, at Km 4 - Măcin Arm (59.2 ind/ m2) for Gomphus (Stylurus) flavipes, respectively, in 2012, at Km 8 - Sf. Gheorghe) (125.8 ind/m2) for Palingenia longicauda. The presence or absence of larvae in samples, as well as their abundance, are strictly dependent on ecological conditions, the type of substrate representing the decisive factor in the microdistribution of the two larvae.
ISSN:1224-6808
2248-2776