نتایج جستجو برای: mesotrophic

تعداد نتایج: 500  

Journal: :Sustainability 2023

Coal mining and the energy industry generate large amounts of solid waste, which must be disposed in landfills lead to numerous environmental problems. This paper presents a method for creating artificial soil mixtures based on an EU-funded international research project called RECOVERY. The main idea behind proposed solution is safe use coal combustion by-products (energetic slag decarbonation...

Journal: Geopersia 2012
Alireza Ashoori Mohammad Vahidinia Shemshad Ghoorchaei

Benthic foraminiferal assemblages from Maastrichtian strata, Gansserina gansseri-Abathamphalus mayaroensis Planktonic Foraminiferal Zone, of the AbTalkh Formation at Aitamir section (west of the Kopeh-Dagh basin) were investigated in order to evaluate the palaeoenvironmental changes (organic matter flux and bottom-water oxygenation). Maastrichtian faunal assemblages are well preserved and diver...

2006
Jed A. Fuhrman

To understand the roles of marine viruses in marine microbial food webs. ~t is important to determine rates and mechanisms of virus degradation and subsequent uptake of degraded virus material and other cell lysis products by heterotrophic marine bacteria. We radiolabeled and concentrated viruses and viral lysis products from either pure cultures (3H) or natural communities (3H and 33P) and add...

2017
S. Masquelier Daniel Vaulot

The distribution of selected groups of microorganisms was analyzed along a South-East Pacific Ocean transect sampled during the BIOSOPE cruise in 2004. The transect could be divided into four regions of contrasted trophic status: a High Nutrient Low Chlorophyll (HNLC) region (mesotrophic) near the equator, the South-East Pacific Ocean gyre (hyper-oligotrophic), a transition region between the g...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2008
N T Chellappa J M Borba O Rocha

The Phytoplankton community and the abiotic factors of the Cruzeta reservoir were studied at three depths, surface, middle (2 m) and bottom, from September, 2004 to June, 2005, in order to characterize the environment and assess the possible factors that influence the compositional change of phytoplankton. Ninety species belonging to 6 classes (Chlorophyceae, Bacillariophyceae, Cyanophyceae, Di...

1999
Rolando Quirós Edmundo Drago

Due to the great climatic variety and the peculiar north–south orographic distribution, Argentinean lake systems include a wide diversity of aquatic environments. The deepest lakes are situated in the Andean Patagonia and Tierra del Fuego, and range from ultraoligotrophic to oligotrophic. Patagonian Plateau lakes are shallower than Andean lakes and usually range from mesotrophic to eutrophic. A...

Journal: :Environmental pollution 2016
Leon J L van den Berg Laurence Jones Lucy J Sheppard Simon M Smart Roland Bobbink Nancy B Dise Mike R Ashmore

Nitrogen (N) deposition impacts natural and semi-natural ecosystems globally. The responses of vegetation to N deposition may, however, differ strongly between habitats and may be mediated by the form of N. Although much attention has been focused on the impact of total N deposition, the effects of reduced and oxidised N, independent of the total N deposition, have received less attention. In t...

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