Results 91 to 100 of about 209,846 (299)

Content in nine minerals and seven vitamins of rotifers (Brachionus plicatilis) fed commercial diets and two forms of Nannochloropsis oculata

Journal of the World Aquaculture Society
The objective of the present study was to determine the effects of spray‐dried and fresh forms of the microalgae Nannochloropsis oculata and other commonly used commercial diets on vitamin and mineral compositions of rotifer produced under commercial ...
Kamil Mert Eryalçın, David Dominguez, Marisol Izquierdo   +2 more
doaj   +1 more source

Spatial variations of small phytoplankton contributions in the Northern Bering Sea and the Southern Chukchi Sea

GIScience & Remote Sensing, 2019
Phytoplankton size classes (hereafter, PSCs) were derived from satellite ocean color data using a present phytoplankton abundance-based optical algorithm in the northern Bering and southern Chukchi Seas to characterize the spatial and seasonal variations
Sang Heon Lee, Jongseong Ryu, Dabin Lee, Jung-Woo Park, Jae-Il Kwon, Jingping Zhao, Seunghyun Son   +6 more
doaj   +1 more source

Vertical distribution and composition of phytoplankton under the influence of an upper mixed layer

, 2010
The vertical distribution of phytoplankton is of fundamental importance for the dynamics and structure of aquatic communities. Here, using an advection-reaction-diffusion model, we investigate the distribution and competition of phytoplankton species in ...
Blasius, Bernd, Rudolf, Lars, Ryabov, Alexei B.   +2 more
core   +1 more source

A fisheries acoustic multi-frequency indicator to inform on large scale spatial patterns of aquatic pelagic ecosystems [PDF]

, 2013
Fisheries acoustic instruments provide information on four major groups in aquatic ecosystems: fish with and without swim bladder (tertiary and quaternary consumers), fluidlike zooplankton (secondary consumers) and small gas bearing organisms such as ...
Bergen, Laurent, Trenkel, Verena
core   +3 more sources

Variation in food availability affects the population age structure of Atlantic puffins Fratercula arctica in the Faroe Islands

Wildlife Biology, EarlyView.
Across their entire Atlantic breeding range, Atlantic puffins Fratercula arctica have experienced decreases in food availability, often leading to population declines. The species is one of the most numerous seabirds in Føroyar (the Faroe Islands, in English) but has faced apparent, unquantified population declines.
Anne N.M.A. Ausems, Dariusz Jakubas, Jens–Kjeld Jensen, Katarzyna Wojczulanis–Jakubas   +3 more
wiley   +1 more source

Study of Phytoplankton Demographic Structure and Biodiversity and its Role in Aquaculture of the Golabar Dam Lake of Zanjan Province [PDF]

بوم‌شناسی آبزیان, 2020
The purpose of this research was to determine the Phytoplankton communities, distribution, abundance, and diversity in Golabar dam lake of Zanjan province. Phytoplankton was sampled in 4 study stations during 1 year, from autumn 2009 to summer 2010.
Sepideh Khatib Haghighi, Hadi Babaei
doaj  

Nutrient Addition Effects on Phytoplankton Communities in the Amazon River Plume [PDF]

The types and abundance of phytoplankton is largely controlled by availability of sunlight and bioavailable nutrients. Phytoplankton require essential nutrients including nitrate, phosphate, and silicate to grow, so understanding the role of these ...
Klotz, Vivian, Montoya, Joseph, Ramcharitar, Benjamin, Strope, Erica Kelly, Subramaniam, Ajit, Thomas, Crystal S.   +5 more
core   +1 more source

Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios? [PDF]

, 2011
Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions of these components, marine seston often exhibits relatively small deviations from the Redfield ratio ...
DO, Hessen, Helene, Frigstad, LJ, Naustvoll, RGJ, Bellerby, TM, Johnsen, Tom, Andersen   +5 more
core   +1 more source

Sponges are celebrated heterotrophs but also key primary producers on changing coral reefs

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Trophic interactions and nutrient cycling lay at the heart of ecosystem health and biodiversity. In recent years, our understanding of these drivers has been repeatedly challenged by rapid and unanticipated climatic effects, combined with an increasing awareness that ...
Michelle Achlatis, Rene M. van der Zande, Sam Arnold, Alphonsus C. Röttgering, Jeroen Schneider, Mathieu Pernice, Jasper M. de Goeij   +6 more
wiley   +1 more source

Defining the ecological strategies of phytoplankton associated bacteria

Nature Communications
Ecological interactions between phytoplankton and bacteria govern the productivity and biogeochemistry of aquatic ecosystems. However, our understanding of these partnerships primarily comes from laboratory-based model systems, meaning that little is ...
Amaranta Focardi, Anna R. Bramucci, Penelope Ajani, Abeeha Khalil, Jean-Baptiste Raina, Justin R. Seymour   +5 more
doaj   +1 more source