Results 21 to 30 of about 1,313,162 (348)

Distribution and drift dispersal dynamics of a caddisfly grazer in response to resource abundance and its ontogeny [PDF]

Royal Society Open Science, 2017
Stream grazers have a major impact on food web structure and the productivity of stream ecosystems; however, studies on the longitudinal (upstream versus downstream) and temporal changes in their drift dynamics and resulting distributions remain limited.
Izumi Katano, Hiromune Mitsuhashi, Hideyuki Doi, Yu Isobe, Tadashi Oishi   +4 more
doaj   +1 more source

Diversity and abundance of water birds in a subarctic lake during three decades

Fauna Norvegica, 2013
The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North Norway were estimated six times during 1983-2012. Systematic mapping surveys were done by boat within the first week after ice-break in June.
Anders Klemetsen, Rune Knudsen
doaj   +1 more source

Combining Geographic Distribution and Trait Information to Infer Predator–Prey Species-Level Interaction Properties

Diversity, 2023
Biotic interactions are a key component of the proper functioning of ecosystems. However, information on biotic interactions is spatially and taxonomically biased and limited to several groups. The most efficient strategy to fill these gaps is to combine
Alejandro Sánchez-Barradas, Wesley Dáttilo, Diego Santiago-Alarcon, W. Daniel Kissling, Fabricio Villalobos   +4 more
doaj   +1 more source

Deleting species from model food webs [PDF]

, 2004
We use food webs generated by a model to investigate the effects of deleting species on other species in the web and on the web as a whole. The model incorporates a realistic population dynamics, adaptive foragers and other features which allow for the ...
Abrams, Abrams, Arditi, Borrvall, Caldarelli, Carlton, Drake, Drossel, Dunne, Elton, Fowler, Fretwell, Fujii, Jordán, Jordán, Law, Lockwood, Lubchenco, Lundberg, MacArthur, Mathsoft Inc., May, May, McCullagh, Milner-Gulland, Morton, Naeem, Navarrete, Odum, Paine, Paine, Pimm, Pimm, Power, Quince, Quince, Shigesada, Solé, Ulanowicz, Ulanowicz, Walker, Yodzis, Yodzis, Yodzis   +43 more
core   +3 more sources

Biogeochemical analysis of ancient Pacific Cod bone suggests Hg bioaccumulation was linked to paleo sea level rise and climate change

Frontiers in Environmental Science, 2015
Deglaciation at the end of the Pleistocene initiated major changes in ocean circulation and distribution. Within a brief geological time, large areas of land were inundated by sea-level rise and today global sea level is 120 m above its minimum stand ...
Maribeth S. Murray, C. Peter McRoy, Lawrence K Duffy, Amy C. Hirons, Jeanne M. Schaaf, Robert P. Trocine, John eTrefry   +6 more
doaj   +1 more source

Using food-web theory to conserve ecosystems [PDF]

, 2015
© 2016, Nature Publishing Group. All rights reserved.Food-web theory can be a powerful guide to the management of complex ecosystems. However, we show that indices of species importance common in food-web and network theory can be a poor guide to ...
McDonald-Madden, E, Possingham, HP
core   +1 more source

Ciliates in different types of pools in temperate, tropical, and polar climate zones – implications for climate change

Journal of Limnology, 2021
Small water bodies are typically characterized by high diversity of various groups of microorganisms. Moreover, these ecosystems react very quickly to even the slightest climate changes (e.g. a temperature increase or water level fluctuations). Thus far,
Tomasz Mieczan, Urszula Bronowicka-Mielniczuk   +1 more
doaj   +1 more source

Cross-Ecosystem Linkages: Transfer of Polyunsaturated Fatty Acids From Streams to Riparian Spiders via Emergent Insects

Frontiers in Ecology and Evolution, 2021
Polyunsaturated fatty acids (PUFAs) are essential resources unequally distributed throughout landscapes. Certain PUFAs, such as eicosapentaenoic acid (EPA), are common in aquatic but scarce in terrestrial ecosystems.
Carmen Kowarik, Carmen Kowarik, Dominik Martin-Creuzburg, Christopher T. Robinson, Christopher T. Robinson   +4 more
doaj   +1 more source

Comparison Between Trophic Positions in the Barents Sea Estimated From Stable Isotope Data and a Mass Balance Model

Frontiers in Marine Science, 2022
The trophic position concept is central in system ecology, and in this study, trophic position (TP) estimates from stable-isotopes and an Ecopath mass-balance food web model for the Barents Sea were compared. Two alternative models for estimating TP from
Torstein Pedersen
doaj   +1 more source

Evaluation of the effect of agroclimatic variables on the probability and timing of olive fruit fly attack

Frontiers in Plant Science
Agroclimatic variables may affect insect and plant phenology, with unpredictable effects on pest populations and crop losses. Bactrocera oleae Rossi (Diptera: Tephritidae) is a specific pest of Olea europaea plants that can cause annual economic losses ...
Gabriele Rondoni, Elisabetta Mattioli, Elisabetta Mattioli, Vito Antonio Giannuzzi, Elena Chierici, Andrea Betti, Gaetano Natale, Gaetano Natale, Ruggero Petacchi, Franco Famiani, Antonio Natale, Eric Conti   +11 more
doaj   +1 more source