New records of Diaphanosoma celebensis Stingelin, 1900 (Crustacea : Daphniiformes : Sididae) in tropical Asia with remarks on the morphological variability and biology of the species

Variabilité morphologique, structure de la population et répartition géographique de l'espèce rare #Diaphanosoma celebensis Stingelin, 1900 sont étudiées à partir de matériel provenant du sud de l'Inde, de Sri Lanka, de Singapour et de Malaisie. Cette espèce est répandue en Asie tropicale et s'étend jusqu'à la zone subtropicale au nord (Bangladesh); elle se rencontre en eau douce (étangs) aussi bien que dans les eaux de salinité élevée, ce qui était inconnu chez les #Sididae. (Résumé d'auteur

A New Species of the Genus Diaphanosoma Fischer (Crustacea: Cladocera: Sididae) from Claypans in Western Australia

Diaphanosoma hamatum sp. nov. is described from material from claypans of a restricted area near Onslow in the north-west of Western Australia. It is characterized by some peculiar features, such as presence of well developed rostrum, small reduced eye, and large hooked spine on the apical end of upper twosegmented antennal branch, which distinguish it from other known species of the genus. The new species is probably closely related to the Australian D. unguiculatum and may be considered as the additional member of the Australian endemic fauna. The ecological signifi cance of morphological features of the species is discussed

The Crustacean Fauna (Branchiopoda, Copepoda) of Shallow Freshwater Bodies in Iceland

A survey of shallow freshwaters of Iceland was conducted in June and July 1996. The 34 stations prospected were rainpools, ditches, wetlands. The composition of their crustacean communities, investigated by qualitative net samples, is discussed in relation to water characteristics. One notostracan, Lepidurus arcticus (Pallas, 1793), 17 cladoceran species (5 Daphniidae, 10 Chydoridae, 1 Macrothricidae, 1 Polyphemidae), and 12 copepods (2 Diaptomidae, 7 Cyclopidae, 3 Canthocamptidae) were identified. Two species are reported for the first time from Iceland: the diaptomid Diaptomus (Chaetodiaptomus) rostripes Herbst, 1955 and the chydorid Alona rustica Scott, 1895. Taxonomical comments about different species are added, and their ecological pecularities are given. The species richness as well as the biogeographical features of the freshwater zooplankton of Iceland are discussed in relation to neighbouring Greenland and Northern Europe.Обследование мелких пресных водоемов Исландии проведено в июне-июле 1996 г. Материал собирался в дождевых и талых лужах, канавах, болотах. Среди 30 обнаруженных видов отмечены 1 вид щитней Lepidurus arcticus (Pallas, 1793), 17 видов ветвистоусых ракообразных (5 представителей сем. Daphnidae, 10 Chydoridae, 1 Macrothricidae, 1 Polyphemidae), 12 видов веслоногих ракобразных (2 вида сем. Diaptomidae, 7 Cyclopidae, 3 Canthocamptidae). Два вида указаны впервые для фауны Исландии: Diaptomus (Chaetodiatomus) rostripes Herbst, 1955 и Alona rustica Scott, 1895. Состав ракообразных в водоемах обсуждается в связи с экологической характеристикой последних. Для отдельных видов представлены краткие таксономические и экологические замечания. Обсуждаются видовое разнообразие и биогеографические особенности Исландии в связи с фаунистическими контактами с Гренландией и северной Европой

Pulgas-de-Água (Daphnia spp.)

Daphnia spp. (pulgas-de-água) - Os organismos do género Daphnia são micro-crustáceos planctónicos de água doce pertencentes à ordem Cladocera (classe Branchiopoda), que ocorrem em ecossistemas lênticos. Devem o nome de “pulga-de-água” aos movimentos natatórios irregulares, análogos aos saltos das pulgas “verdadeiras”.info:eu-repo/semantics/publishedVersio

Global data set of long-term summertime vertical temperature profiles in 153 lakes

peer reviewedClimate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many studies highlight warming of surface water temperatures in lakes worldwide, less is known about long-term trends in full vertical thermal structure and deepwater temperatures, which have been changing less consistently in both direction and magnitude. Here, we present a globally-expansive data set of summertime in-situ vertical temperature profiles from 153 lakes, with one time series beginning as early as 1894. We also compiled lake geographic, morphometric, and water quality variables that can influence vertical thermal structure through a variety of potential mechanisms in these lakes. These long-term time series of vertical temperature profiles and corresponding lake characteristics serve as valuable data to help understand changes and drivers of lake thermal structure in a time of rapid global and ecological change. © 2021, The Author(s)

The Southern Part of Russian Far East and Korean Peninsula as a Transition Zone between the Boreal and Tropical Faunas of the Waterfleas (Cladocera, Crustacea)

Abstract: Based on original data, the most complete and updated species list of the water fleas (Crustacea: Cladocera) of both the southern part of the Russian Far East and Korea is represented. In total, 122 taxa are identified to the species level. The list includes 92 valid species recorded in the Far East of Russia and 71 in South Korea. Each taxon is attributed to one of the six zoogeographical groups: one among four faunistic complexes (widespread Eurasian, East Asian–American, endemic East Asian, and southern tropical), a group of widely distributed unrevised taxa, and a group of invasive species. With a decrease in latitude (i.e., in the north–south direction), (1) the species richness is decreased, (2) the dominance structure (based on species occurrence frequencies) is changed from two–three dominant species to a lack of clear dominants; (3) the rate of representatives of the widespread Eurasian complex is decreased, while that of the southern tropical taxa is increased, and (4) the taxocoenoses of the boreal type are changed to those of subtropical type. In addition to boreal and subtropical type taxocoenoses, three more taxocoenosis types are found in the Khanka Lake basin (the largest water body in the region). The relative abundance and occurrence of taxa from the endemic East Asian complex are similar within the entire region and do not vary with latitude