Results 41 to 50 of about 806 (171)

Geographical variation in size of the three final stadia of Cordulegaster boltonii (Donovan, 1807) larvae in the Iberian Peninsula (Odonata: Cordulegastridae)

International Journal of Odonatology
A two-variable analysis of male and female Cordulegaster boltonii larvae (head width and hindwing sheath length) in specimens from five Iberian populations was carried out with the objective of ascertaining whether these traits differ between populations.
M. Hernández, P. Casanueva, Javier Oscoz, L. F. Sánchez-Sastre, M. Ferreras‐Romero, Francisco Campos   +5 more
semanticscholar   +1 more source

Biological Monitoring Using Macroinvertebrates as Bioindicators of Water Quality of Maroaga Stream in the Maroaga Cave System, Presidente Figueiredo, Amazon, Brazil

International Journal of Ecology, Volume 2014, Issue 1, 2014., 2014
Aquatic environments are being modified by anthropogenic activities regarding their biological, physical, and chemical conditions; even pristine aquatic ecosystems can be threatened. This study focused on the biological monitoring of Maroaga Stream—a first order stream located in an Environmental Protection Area in the Amazon using the Biological ...
Christiane Brito Uherek, Fernando Bernardo Pinto Gouveia, L. M. Chu   +2 more
wiley   +1 more source

Biological Invasion and Coexistence in Intraguild Predation

Journal of Applied Mathematics, Volume 2013, Issue 1, 2013., 2013
Invasion of an exotic species initiated by its local introduction is considered subject to intraguild predation (IGP). Mathematically, the system dynamics is described by three nonlinear diffusion‐reaction equations in two spatial dimensions. The key factors that determine successful invasion are investigated by means of extensive numerical simulations.
Wenting Wang, Xiaoli Feng, Xiuping Chen, Julián López-Gómez   +3 more
wiley   +1 more source

Integrating eDNA and community science to monitor urban Odonata diversity

Insect Conservation and Diversity, Volume 19, Issue 1, Page 84-92, January 2026.
Environmental DNA captured rare and underrepresented taxa often missed by community science observations. Community science revealed adult‐stage observations across a broader temporal window. Integrating both methods improved detection across life stages, seasons, and species prevalence.
Rhema Uche‐Dike, Ethan Tolman, Christian Benischek, Magnolia Schneider, Manpreet K. Kohli, Jonas Bush, Paul B. Frandsen, Isabella M. Errigo, Wendy Frankel, Kristin Gnojewski, Kim Chmura, Dick Jordan, Hannah Kittler, Michel Liao, Trinity Tobin, Cindy Su, Gracie Castillo, Ethan Derderian, Maleah Wei, Santiago Fernandez‐Jaurez, Towako Tamano, Ben Gallafent, James Jenson, Christoph A. Walser, Jessica L. Ware, Christopher D. Beatty   +25 more
wiley   +1 more source

Aquatic biosurvey of the Lovell River on UNH land [PDF]

, 2003
We assessed the physical, chemical and biological conditions at two sites along the Lovell River on University of New Hampshire (UNH) -owned conservation land. The discharge was 4.4 m3 s-1 at Site 1 and 5.7 m3 s -1 downstream at Site 2.
Barry, Lisa M., Bradt, Shane R., Carlson, Sonya C., Haney, James F., I., false Jorel, Knobelman, Kathleen, Kathleen B., Knox, Jessica L., Lund, Emily A., Peter, Chris R., Potter, Jody D., Quinn, Patrick K., Rivers, David, Skokan, Rachel D.   +12 more
core   +1 more source

New State Record and Notable Range Extension for \u3ci\u3eLibellula Semifasciata\u3c/i\u3e (Odonata: Libellulidae) [PDF]

, 2018
The painted skimmer, Libellula semifasciata Burmeister (Odonata: Libellulidae), is an eastern species of dragonfly that has never been documented in Iowa.
Dixon, Joseph W, Otten, Joshua G, Rasmussen, Ryan D   +2 more
core   +2 more sources

Length–Dry Mass Relationships of Aquatic Insects: Geographic and Taxonomic Variation in a Digital Database

Freshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT Aquatic insects are an abundant, yet declining, taxonomically heterogeneous group with special importance in both aquatic and terrestrial ecosystems. Accurate estimations of insect biomass during their aquatic life stages are essential to advance our fundamental knowledge about insects, their roles in ecosystems, and their vulnerability to ...
Casper H. A. van Leeuwen, Zoltán Csabai, Anita Szloboda, Arnold Móra, Steven A. J. Declerck   +4 more
wiley   +1 more source

Stream Invertebrate Responses to Fine Sediment Depend on the Organic and Inorganic Components

Freshwater Biology, Volume 70, Issue 3, March 2025.
ABSTRACT Excess fine sediment ( < 2 mm) is a pervasive stressor of aquatic systems at a global scale. To date, most research quantifying ecological response to deposited fine sediment has been conducted without distinguishing between the organic and inorganic components of fine sediment, leaving mechanistic understanding of how fine sediment affects ...
Morwenna McKenzie, Adrian L. Collins, Noah G. Davis, Roger Hodson, J. Iwan Jones, Christoph D. Matthaei, John F. Murphy, Annika Wagenhoff, Kate L. Mathers   +8 more
wiley   +1 more source

Biogeography of Endemic Dragonflies of the Ozark-Ouachita Interior Highlands [PDF]

, 2019
A common pattern across many taxonomic groups is that relatively few species are widespread while the majority are restricted in their geographic ranges. Such species distributions are used to inform conservation status, which poses unique challenges for
Boys, Wade Alexander
core   +2 more sources

Road Mortality of Dragonflies (Odonata) in a Great Lakes Coastal Wetland [PDF]

, 2018
Although road mortality of vertebrates has been well studied, road mortality of invertebrates has rarely been studied or considered in management scenarios. Mackinac Bay is an extensive coastal wetland in northern Michigan.
Riffell, Samuel Keith
core   +3 more sources