Emergence patterns of riverine dragonflies (Odonata: Gomphidae) in Hungary: variations between habitats and years

Farkas, Anna; Jakab, Tibor; Tóth, Ádám; Kalmar, Attila

doi:10.1080/01650424.2012.643030

Cited by 20 publications

(23 citation statements)

References 23 publications

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“…Patterns of dragonfly emergence did not change between 2014 and 2016. These findings contrast with a previous study in Hungary that found abundance and species composition in emergent riverine dragonfly populations, especially gomphids, changed from year to year 23 . The discrepancy in temporal patterns in that study compared to our study was likely due to a difference in scale: our study examined a relatively small spatial scale (~ 340 km 2 area encompassing all sites, 44.1 km maximum distance between farthest sites; average = 19.03 km, SD = 14.45 km), whereas the other study examined 700 km of river 23 .…”

Section: Discussioncontrasting

confidence: 99%

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Riparian and in-channel habitat properties linked to dragonfly emergence

O'Malley

Compson

Orlofske

et al. 2020

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In freshwater ecosystems, habitat alteration contributes directly to biodiversity loss. Dragonflies are sentinel species that are key invertebrate predators in both aquatic (as larvae) and terrestrial ecosystems (as adults). Understanding the habitat factors affecting dragonfly emergence can inform management practices to conserve habitats supporting these species and the functions they perform. Transitioning from larvae to adults, dragonflies leave behind larval exoskeletons (exuviae), which reveal information about the emergent population without the need for sacrificing living organisms. Capitalizing on Atlantic Canada’s largest freshwater wetland, the Grand Lake Meadows (GLM) and the associated Saint John/Wolastoq River (SJWR), we studied the spatial (i.e., across the mainstem, tributary, and wetland sites) and temporal (across 3 years) variation in assemblages of emergent dragonflies (Anisoptera) and assessed the relative contribution of aquatic and terrestrial factors structuring these assemblages. The GLM complex, including the lotic SJWR and its tributaries and associated lentic wetlands, provided a range of riparian and aquatic habitat variability ideal for studying dragonfly emergence patterns across a relatively homogenous climatic region. Emergent dragonfly responses were associated with spatial, but not temporal, variation. Additionally, dragonfly communities were associated with both aquatic and terrestrial factors, while diversity was primarily associated with terrestrial factors. Specific terrestrial factors associated with the emergence of the dragonfly community included canopy cover and slope, while aquatic factors included water temperature, dissolved oxygen, and baseflow. Our results indicate that management of river habitats for dragonfly conservation should incorporate riparian habitat protection while maintaining aquatic habitat and habitat quality.

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Section: Discussioncontrasting

confidence: 99%

“…Further, low water pH can adversely affect the survival and emergence of other dragonflies 22 . Aquatic factors may also influence the transition to the adult stage, including optimal water temperature, which is necessary to synchronise mass emergence for some species 23 .…”

Section: Introductionmentioning

confidence: 99%

Riparian and in-channel habitat properties linked to dragonfly emergence

O'Malley

Compson

Orlofske

et al. 2020

Sci Rep

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“…Está por aclarar si en años en los que los meses de febrero a mayo sean más cálidos las larvas de C. boltonii y B. irene emergen antes en el río analizado o siguen el mismo patrón que el encontrado ese año. Farkas et al (2012) registraron en ríos de Hungría variaciones interanuales en la fenología de emergencia para varias especies de gónfidos, que relacionaron con la temperatura del agua. En nuestro caso para el río Eresma sólo hemos analizado un año, por lo que es probable que las larvas modifiquen su fecha de emergencia en primaveras con temperatura más normal y no tan fría como la de 2016.…”

Section: Discussionunclassified

<em>Boyeria irene</em> (Fonscolombe, 1838) y <em>Cordulegaster boltonii</em> (Donovan, 1807) (Odonata): dos estrategias en cuanto a sustratos de emergencia de larvas en un mismo hábitat

et al. 2017

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RESUMENSe presentan datos sobre emergencia de Cordulegaster boltonii y Boyeria irene en un río de montaña del centro de España (altitud 1200 m s.n.m.) donde coexisten ambas especies, basados en la recogida semanal de exuvias. Boyeria irene comenzó a emerger 28 días más tarde que C. boltonii. Los sustratos usados por las larvas de ambas especies para emerger se solaparon ampliamente, aunque C. boltonii utilizó significativamente más árboles. Con respecto a otras zonas geográficas, las dos especies han modificado su estrategia, retrasando el inicio del periodo de emergencia. Se discute la importancia de las condiciones ambientales (sobre todo temperatura) en este hecho.Palabras clave: Ríos; Odonata; Aeshnidae; Cordulegastridae; exuvias; España. ABSTRACT Boyeria irene (Fonscolombe, 1838) and Cordulegaster boltonii (Donovan, 1807) (Odonata): two strategies of substrates for emergence in the same habitatData on the emergence of coexisting Cordulegaster boltonii and Boyeria irene in a mountain stream in the center of Spain (altitude 1200 m a.s.l.) are presented in the study, based on the weekly collection of exuviae. Boyeria irene began to emerge 28 days later than C. boltonii. Larvae of both species overlapped extensively in their selection of substrates for emergence, although a significantly higher use of trees was found in C. boltonii. In comparison to other geographical areas, both species have modified their strategy, delaying the onset of the emergence period. The importance of environmental conditions (especially temperature) is discussed.

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“…As spates occur, river bank changes are frequent on the unprotected river banks (in some places even on the protected ones), which continuously transform the typical natural habitats of the area. Regular larvae and exuviae collections are hindered by river bank displacements, transformation of the river bank structure, alluvium rearrangements, regular spates, and gravel mining from the river channel (Farkas et al 2011(Farkas et al , 2012. In the riverine habitats high and low periods of water level may alternate within a year.…”

Section: Methodsmentioning

confidence: 99%

Dragonfly assemblages in the upper parts of the River Tisza: a comparison of larval and exuvial data in three channel types

Kolozsvári¹,

Szabó²

2015

Acta Zool Acad Sci H

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We studied dragonfly assemblages in the Ukrainian section of the River Tisza, which still shows several natural (unregulated) properties. In 2010 and 2011 larvae and exuviae were collected in the vicinity of the villages Vilok (Вилок, Tiszaújlak), Nove Szelo (Нове Cело, Tiszaújhely), Tiszobikeny (Тисабикень, Tiszabökény) and of the towns Vinohragyiv (Виноградiв, Nagyszőlős) and Huszt (Хуст, Huszt). We collected our samples from 8 sites in the main channel, 2 sites in side channels and 3 sites in two dead channels. We collected 255 larvae and 1587 exuviae, from which 8 species of dragonflies were identified [Gomphus vulgatissimus (Linnaeus, 1758), Stylurus flavipes (Charpentier, 1825), Onychogomphus forcipatus (Linnaeus, 1758), Ophiogomphus cecilia (Fourcroy, 1785), Somatochlora metallica (van der Linden, 1825), Calopteryx splendens (Harris, 1782), Platycnemis pennipes (Pallas, 1771), and Sympecma fusca (van der Linden, 1820)]. We compared the species composition of dragonflies in the three habitats. In the case of larvae in the main channel G. vulgatissimus (48.0%), C. splendens (29.6%) and O. forcipatus (20.8%) dominated, while in the dead channels C. splendens (49.5%) and P. pennipes (23.7%) were found most frequently. In the side channels G. vulgatissimus, O. forcipatus and C. splendens were the most frequent species. S. flavipes appeared only in the main and side channels, while S. metallica and S. fusca were only detected in the dead channels.

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Emergence patterns of riverine dragonflies (Odonata: Gomphidae) in Hungary: variations between habitats and years

Cited by 20 publications

References 23 publications

Riparian and in-channel habitat properties linked to dragonfly emergence

Riparian and in-channel habitat properties linked to dragonfly emergence

<em>Boyeria irene</em> (Fonscolombe, 1838) y <em>Cordulegaster boltonii</em> (Donovan, 1807) (Odonata): dos estrategias en cuanto a sustratos de emergencia de larvas en un mismo hábitat

Dragonfly assemblages in the upper parts of the River Tisza: a comparison of larval and exuvial data in three channel types

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