Results 21 to 30 of about 5,797 (201)

The impacts of environmental warming on Odonata: a review [PDF]

open access: yes, 2008
Climate change brings with it unprecedented rates of increase in environmental temperature, which will have major consequences for the earth's flora and fauna.
Adams J.   +165 more
core   +1 more source

First Records for \u3ci\u3eAeshna Sitchensis\u3c/i\u3e (Odonata: Aeshnidae) and \u3ci\u3eEnallagma Clausum\u3c/i\u3e (Odonata: Coenagrionidae), and a Northwestern Record for the State-Endangered \u3ci\u3eSomatochlora Incurvata\u3c/i\u3e (Odonata: Corduliidae) in Wisconsin [PDF]

open access: yes, 2018
While surveying for Odonata in coastal peatlands and associated shoreline areas adjacent to Lake Superior in Wisconsin, we documented populations of two new state record species, the zig-zag darner (Aeshna sitchensis Hagen) and the alkali bluet ...
DuBois, Robert B   +4 more
core   +2 more sources

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions [PDF]

open access: yes, 2012
1. This study investigated inter-specific variation in parasitism by gregarines (Eugregarinorida: Actinocephalidae), among sibling species of damselflies (Odonata: Zygoptera), in relation to relative size of geographical ranges of host species.
Forbes, MR, Hassall, C, Mlynarek, JJ
core   +1 more source

Fluctuating asymmetry, body size, reproductive period and life time mating success of males of Cercion lindeni (Odonata: Coenagrionidae)

open access: yesEuropean Journal of Entomology, 2005
Mating success is linked to reproductive success in males, but parameters influencing it are poorly known. The relationships between lifetime mating success (LMS), fluctuating asymmetry (FA), body size (SIZE), reproductive period (RP) and emergence date (
Gianmaria CARCHINI   +4 more
doaj   +1 more source

Salud ambiental del río ranchería a través de macroinvertebrados acuáticos en el área de influencia del complejo carbonífero el cerrejón

open access: yesTecnura, 2020
Objetivo: Esta investigación tuvo como objetivo evaluar la salud ambiental del ecosistema lótico río Ranchería en el área de influencia del complejo carbonífero El Cerrejón, a través de bioindicación con macroinvertebrados acuáticos.
Ana Patricia Espinosa Romero   +2 more
doaj   +1 more source

Persistence of Urban Stream Syndrome Effects from Point Source and Non-Point Source Pollutants [PDF]

open access: yes, 2017
In a previous study, Sager Creek, a small 1st-3rd order stream in northwest Arkansas was shown to be negatively impacted by urban land usage within the watershed, producing a stream that exhibited several indicators of urban stream syndrome.
Wakefield, T. S.
core   +3 more sources

Leveraging Massive Opportunistically Collected Datasets to Study Species Communities in Space and Time. [PDF]

open access: yesEcol Lett
We present a spatiotemporal joint species distribution model to analyse large‐scale opportunistically collected biodiversity data. Our model addresses variable detection probabilities across visits and species by modelling phenological patterns and by extending the use of latent variables to characterise observer‐specific detection and reporting ...
Fajgenblat M   +8 more
europepmc   +2 more sources

Latitudinal variation in morphology in two sympatric damselfly species with contrasting range dynamics (Odonata: Coenagrionidae)

open access: yesEuropean Journal of Entomology, 2008
Geographic range expansion is one of the best documented macroecological consequences of climate change. A concomitant change in morphology has been demonstrated in some species. The relationship between latitudinal variation in morphology (e.g. Bergmann'
Christopher HASSALL   +2 more
doaj   +1 more source

The response of neotropical dragonflies (Insecta: Odonata) to local and regional abiotic factors in small streams of the Amazon [PDF]

open access: yes, 2019
Since the relative role of local and regional abiotic factors on the Odonata diversity in rainforest streams is still poorly understood, we evaluated the effects of these factors on adult Odonata (Insecta) from preserved and altered streams in the ...
Belle   +20 more
core   +1 more source

Wings of Coenagrion puella vary in shape at the northern range margin (Odonata: Coenagrionidae) [PDF]

open access: yes, 2008
A previous study has shown that wing size in Coenagrion puella varied considerably along a latitudinal gradient in the UK. Using landmark data from wing images, patterns of shape variation were also determined along the same transect by geometric ...
Harvey, IF, Hassall, C, Thompson, DJ
core   +1 more source

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