Results 51 to 60 of about 9,122 (188)

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

Boreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein, Thomas Kasper, Alexis Badai Samudra, Martin Theuerkauf, Markus Lothar Fischer, Neda Rahimzadeh, Maria Sekar Proborukmi, Sonja Rigterink, Agnieszka Gruszczyńska, Christian Zeeden, Simon Parfitt, David John Horne, Lucy Roberts, Dustin White, Lisa Brogmus, Hans von Suchodoletz, Tobias Lauer, Marcel Weiss, David Colin Tanner, Brigitte Urban   +19 more
wiley   +1 more source

The Effects of Nutrient Additions on Kokanee in Dworshak Reservoir, Idaho

Fisheries Management and Ecology, EarlyView.
ABSTRACT We investigated the effects of whole reservoir nitrogen (N) addition on kokanee growth in Dworshak Reservoir, Idaho. We hypothesized that N addition would improve the growth of kokanee (Oncorhynchus nerka) at a given level of abundance by increasing the availability of Daphnia, an important food source.
Sean M. Wilson, Matthew P. Corsi, Eric J. Stark, Eli A. Felts, Andrew M. Dux, Ryan S. Hardy   +5 more
wiley   +1 more source

The Effect of Food Concentration on the Juvenile Somatic Growth Rate of Body Length, Fecundity and the Production of Resting Eggs by Moina brachiata (Crustacea: Cladocera) Single Females [PDF]

Журнал Сибирского федерального университета: Серия Биология, 2012
The study addresses the effect of different food concentrations of green alga Chlorella vulgaris on the life cycle parameters (the body length, specific juvenile somatic growth rate of body length, the number of offspring in the first clutch of ...
Tatiana S. Lopatina, Egor S. Zadereev
doaj  

Assessing local adaptation and divergence at early life stages within Eastern Baltic cod (Gadus morhua)

Journal of Fish Biology, EarlyView.
Abstract Many commercially exploited fish stocks have declined over the last few decades. It is therefore essential to identify natural populations and understand local adaptation for sustainable management. Salinity is a key environmental factor shaping local adaptation, and adaptive trait divergence often occurs at the egg and larval stages.
Maddi Garate‐Olaizola, Johanna Fröjd, Vanda Larsson Åberg, Alma Hodzic‐Vázquez, Yvette Heimbrand, Anders Nissling, Jane W. Behrens, Maria Cortázar‐Chinarro, Ulf Bergström, Anssi Laurila   +9 more
wiley   +1 more source

Polyploidy and clonal diversity in an arctic cladoceran [PDF]

Heredity, 1995
Genome size determinations were coupled with allozyme and mtDNA studies to gain insights into the origin of polyploidy and clonal diversity in populations of Daphnia tenebrosa from Churchill, Manitoba. Allozymic variation at five enzyme loci allowed the detection of 32 clones.
France Dufresne, Paul D N Hebert
openaire   +1 more source

Trophic niche overlap between native and non‐native fishes in central Anatolian lakes, Türkiye

Journal of Fish Biology, EarlyView.
Abstract The Central Anatolian region of Türkiye exhibits exceptionally high freshwater fish diversity and endemism and is increasingly exposed to the introduction of non‐native taxa. We examined the diet composition, prey selectivity and interspecific dietary overlap among eight native and five non‐native fish species across seven lakes in Central ...
Arely Ramírez‐García, Mustafa Korkmaz, Juan Pablo Pacheco, Ülkü Nihan Tavşanoğlu, Marco V. Pita‐Zamudio, Vildan Acar, Celina Aznarez, Melisa Metin, Cemreay Dede, Gültekin Yılmaz, Serhat Ertuğrul, Cihelio Alves Amorim, Mehmet Arda Çolak, İbrahim Kaan Özgencil, Zuhal Akyürek, Korhan Özkan, Meryem Beklioğlu, Erik Jeppesen   +17 more
wiley   +1 more source

Crustacean Zooplankton Ingestion of Potentially Toxic Microcystis: In Situ Estimation Using mcyE Gene Gut Content Detection in a Large Temperate Eutrophic Lake

Toxins
Grazing by zooplankton can regulate bloom-forming cyanobacteria but can also transfer toxin-producing cells, as well as toxic metabolites, to the food web.
Helen Agasild, Margarita Esmeralda Gonzales Ferraz, Madli Saat, Priit Zingel, Kai Piirsoo, Kätlin Blank, Veljo Kisand, Tiina Nõges, Kristel Panksep   +8 more
doaj   +1 more source

Winter decrease of zooplankton abundance and biomass in subalpine oligotrophic Lake Atnsjøen (SE Norway)

Journal of Limnology, 2019
Despite the rapidly changing winter conditions in temperate ecosystems, little attention has been devoted to the effects of these changes on lake ecology.
Thomas C. Jensen
doaj   +1 more source

The influence of xenobiotics in river sediment on the reproduction and survival of Daphnia magna, 1820, Straus Influência de xenobióticos no sedimento de rio sobre a reprodução e a sobrevivência de Daphnia magna, 1820, Straus

Acta Limnologica Brasiliensia, 2012
AIM: The Taquari River, a tributary of Guaíba Lake, is a major economic and environmental source for Rio Grande do Sul, a state located in the far south of Brazil; METHODS: This study evaluated the interference of sediment from this river in the ...
Silvana Pereira Gonçalves, Fabiane Lucheta, Viviane Kelin de Souza, Nara Regina Terra   +3 more
doaj  

Paleoenvironments of the Last Interglacial–Glacial Transition on the East European Plain: Insights into Climate-Driven Ecosystem Dynamics

Quaternary
A multiproxy study of a new Pleistocene locality at Ivantzevo, Moscow Region, was conducted to reconstruct paleoenvironments from the Middle Pleistocene to the Last Pleniglacial.
E. Ershova, S. Kuzmina, S. Sycheva, I. Zyuganova, E. Izumova, A. Zharov, V. Yu. Kuznetsov, F. Maksimov, S. Kolesnikov, N. Lavrenov, E. Ponomarenko   +10 more
doaj   +1 more source