Hay tantas efímeras en este pueblo que están causando accidentes de auto

En el poblado de Wrightsville, en Pensilvania, Estados Unidos han tenido que cerrar un puente debido a que hay tantas efímeras tanto vivas como muertas que han llegado a causar accidentes de auto. El puente se encuentra sobre el río Susquehanna.

El jefe de la policía de Wrightsville comenta que tuvieron que atender tres accidentes de auto y uno de motocicleta, dijo que el suelo estaba cubierto por cinco centímetros de cuerpos de estos insectos y mencionó que el manejar en estas circunstancias es muy parecido a manejar en zonas con nieve, sólo que con peor olor.

Photo credit: Blaine Shahan/LNP via AP via HPost

Photo credit: Blaine Shahan/LNP via AP via HPost

Las efímeras pertenecen al orden Ephemeroptera, son insectos pequeños cuya larva es acuática y se conoce como náyade y pueden vivir en este estadio cerca de dos años, cuando emergen los adultos sólo buscan una cosa: reproducirse, por lo que es común verlos revoloteando en masa unos contra otros, el adulto ya no se alimenta. Como muchos insectos, son atraídos por las luces artificiales.

Tom Smith, del condado Penn dice que a pesar de todo, el panorama da esperanza, ya que las efímeras son buenos indicadores de la calidad del agua, por lo que el río Susquehanna pudiera no estar tan contaminado.

Tomado de: Hufftington Post

Aquatic insects of the central North Island

Aquatic insects of the central North Island
D. R. Cowley

ABSTRACT
An account is given of the streams of the central North Island and the invertebrate fauna they contain.

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TROPHIC RELATIONS OF AQUATIC INSECTS

TROPHIC RELATIONS OF AQUATIC INSECTS
KENNETH W. CUMMINS

INTRODUCTION
One of the most ubiquitous features of freshwater habitats is their present rate of change in response to man-engendered perturbations. Any rehabilitative or management strategy characterized by a high probability for success must rely on fundamental knowledge of the intricacies of freshwater ecosystem
structure and function. A basic facet of this structure and function is material cycling and energy flow. In turn, a significant portion of such cycling and flow involves the processing of various forms of organic matter by
freshwater invertebrate animals, especially insects. This constitutes a basis for interest in aquatic insect trophic relations-food intake, tissue assimilation, and waste release-with implications ranging from theoretical questions, such as the efficiency of energy transfer, to very specific practical problems: for example, population control of "pest" species represented either by the food or the feeder. As Bates (2) put it, trophic relationships constitute the "cement" holding biological communities together.

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Aquatic Insects as Biological Monitors of Heavy Metal Pollution

Aquatic Insects as Biological Monitors of Heavy Metal Pollution
R. Barry Nehring

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Ecological studies on aquatic insects.

Ecological studies on aquatic insects.
G. S. Dodds & F. L. Hisaw

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Distribution and taxonomic contributions to the ephemeroptera fauna of Mexico and Central America.

Distribution and taxonomic contributions to the ephemeroptera fauna of Mexico and Central America.
N. A. Wiersema & D. E. Baumgardener

Abstract. New records for 16 species of mayflies are reported for Belize, Costa Rica and the Mexican states of Chihuahua, Nuevo Leon and Tamaulipas. The presence of Apobaetis indeprensus in Tamaulipas, representing the first report in Mexico and first record other than its type locality in Costa Rica. Cloeodes excogitatus is reported in Nuevo Leon and Tamaulipas representing the first known locations in Mexico. A new species, Cloedes waltzi, is described from a distinctive larva collected from the Rio Corona in Tamaulipas, Mexico.

https://drive.google.com/file/d/0Bxe0ko6tYQawRi1PSnlIQ2VTM1k/view?usp=sharing

The Mayflies (Ephemeroptera), Stoneflies (Plecoptera), and Caddisflies (Trichoptera) of the Adirondack Park (New York State).

The Mayflies (Ephemeroptera), Stoneflies (Plecoptera), and Caddisflies (Trichoptera) of the Adirondack Park (New York State).

L. W. MYERS, B. C. KONDRATIEFF, T. B. MIHUC and D. E. RUITER

https://drive.google.com/file/d/0Bxe0ko6tYQawVkhqcDlEZFdWY3M/view?usp=sharing

Relationship between aquatic insects and heavy metals in an urban stream using multivariate techniques

Relationship between aquatic insects and heavy metals in an urban stream using multivariate techniques
S. Girgin; N. Kazancı; M. Dügel

ABSTRACT: In the study, the relationship between some aquatic insect species (Ephemeroptera,  Plecoptera, Trichoptera and Odonata) and some heavy metals (cadmium, lead, copper, zinc, nickel, iron and manganese) and boron were assessed using data obtained from the Ankara Stream, which flows through Ankara, the capital city of Turkey and receives high organic and industrial wastes. Sampling was carried out monthly along the Ankara Stream in 1991. environmental data were used to explain biological variation using multivariate techniques provided by the program canonical correspondence analysis ordination. The  ordination method canonical correspondence analysis was applied to evaluate the relationships between environmental variables and distribution of aquatic insect larvae. Data sets were classified by two way indicator species analysis. In this study, aquatic insecta communities have been shown by canonical correspondence analysis ordination as related to total hardness, pH, cadmium, lead, copper, zinc, nickel,
iron, manganese and boron. Cadmium, lead, copper and boron exceeded limits of the United States Environmental Protection Agency criteria for aquatic life. Trichopteran, Dinarthrum iranicum was an indicator of two way indicator species analysis and was placed close to the arrow representing copper. Odonate, Aeschna juncea was an indicator of two way indicator species analysis in site 10 and was placed close to the arrows representing manganese, lead, and nickel. Trichopteran, Cheumatopsyche lepida and odonate, Platycnemis pennipes were indicators of two way indicator species analysis for sites 6, 7, 11, 14, 15, 18 and were placed close to the arrows representing cadmium, boron, iron and total hardness.

https://drive.google.com/file/d/0Bxe0ko6tYQawYTdlR0xIZTJiRjg/view?usp=sharing

Aquatic Insects in Eastern Australia: A Window on Ecology and Evolution of Dispersal in Streams

Aquatic Insects in Eastern Australia: A Window on Ecology and Evolution of Dispersal in Streams
Jane M. Hughes *, Joel A. Huey, Alison J. McLean and Olivier Baggiano

Abstract: Studies of connectivity of natural populations are often conducted at different timescales. Studies that focus on contemporary timescales ask questions about dispersal abilities and dispersal behavior of their study species. In contrast, studies conducted at historical timescales are usually more focused on evolutionary or biogeographic questions. In this paper we present a synthesis of connectivity studies that have addressed both these timescales in Australian Trichoptera and Ephemeroptera. We conclude that: (1) For both groups, the major mechanism of dispersal is by adult flight, with larval drift playing a very minor role and with unusual patterns of genetic structure at fine scales explained by the “patchy recruitment hypothesis”; (2) There is some evidence presented to suggest that at slightly larger spatial scales (~100 km) caddisflies may be slightly more connected than mayflies; (3) Examinations of three species at historical timescales showed that, in southeast Queensland Australia, despite there being no significant glaciation during the Pleistocene, there are clear impacts of Pleistocene climate changes on their genetic structure; and (4) The use of mitochondrial DNA sequence data has uncovered a number of cryptic species complexes in both trichopterans and ephemeropterans. We conclude with a number of suggestions for further work.

https://drive.google.com/file/d/0Bxe0ko6tYQawMHpXaE5tdHJYSjg/view?usp=sharing