Results 21 to 30 of about 287,123 (361)

Nutrient concentrations and trophic state of three Andean lakes from Junín, Perú

Revista Ambiente & Água, 2020
The study assessed the trophic state of three lakes used as fish farms in the region of Junín-Peru, under different hydrological conditions. Surface water samples were collected from three points at each lake in 2018 during the rainy (March-April) and ...
Fernán Chanamé-Zapata, María Custodio, Christian Poma-Chávez, Alex Huamán-De La Cruz   +3 more
doaj   +1 more source

Effects of water temperature on summer periphyton biomass in shallow lakes: a pan-European mesocosm experiment [PDF]

, 2015
Periphyton communities play an important role in shallow lakes and are controlled by direct forces such as temperature, light, nutrients, and invertebrate grazing, but also indirectly by planktivorous fish predation.
Adrian, Rita, Beklioğlu, Meryem, Filiz, Nur, Hejzlar, Josef, Hilt, Sabine, Mahdy, Aldoushy, Papastergiadou, Eva, Scharfenberger, Ulrike, Özkundakci, Deniz, Šorf, Michal [u.v.m.]   +9 more
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ESTIMASI ZONA POTENSIAL PENANGKAPAN IKAN (ZPPI) PROVINSI BENGKULU MENGGUNAKAN CITRA SATELIT MODIS AQUA

JFMR-Journal of Fisheries and Marine Research, 2019
The research aims to; (1) knowing the traditional parameters of the Bengkulu province community in determining fishing zones, (2) mapping the potential fishing zones (ZPPI) in the West Coast waters of Bengkulu province.
Rina Julita, Mr. Mujiono
doaj   +1 more source

Influence of alcoholic extracts from Helianthus annnus L. roots on the photosynthetic activity of Sinapis alba L. cv. Barka plants

Acta Agriculturae Scandinavica. Section B, Soil and Plant Science, 2020
Allelopathy substances stimulate or inhibit seed germination, growth and development of plant species living in their neighbouring, or occupying the same place directly after them.
Joanna Puła, Peiman Zandi, Alina Stachurska-Swakoń, Beata Barabasz-Krasny, Katarzyna Możdżeń, Yaosheng Wang   +5 more
doaj   +1 more source

Longitudinal patterns in an Arkansas River Valley stream: an Application of the River Continuum Concept [PDF]

, 2017
The River Continuum Concept (RCC) provides the framework for studying how lotic ecosystems vary from headwater streams to large rivers. The RCC was developed in streams in eastern deciduous forests of North America, but watershed characteristics and land
Adams, S. R., Burgad, A. A., Clark, S. T., Furr, M. E., Lenard, A. N., Polett, M. E., Robinson, C. D., Sherwood, C. R., Spooner, G. L., Stoughton, S. J.   +9 more
core   +3 more sources

Estudo das diferentes formas de fósforo nas águas da plataforma continental do Amazonas Study of different forms of phosphorus in the Amazon continental shelf waters

Química Nova, 2007
Hydrological samples were collected on the continental shelf of the Amazon river to determine particulate organic and inorganic matter, dissolved organic phosphorus (DOP), phosphate, total particulate phosphorus (TPP), chlorophyll a, temperature ...
Maria de Lourdes Souza Santos, Kátia Muniz, Fernando Antonio do Nascimento Feitosa, Benício de Barros Neto   +3 more
doaj   +1 more source

Technical note: The effects of five different defaunation methods on biogeochemical properties of intertidal sediment [PDF]

, 2012
Various methods have been used to remove organisms from sediments to investigate structure and function of faunal assemblages in intertidal habitats. Nevertheless, little is known about how these treatments affect properties of the sediments themselves ...
Chapman, M.G., Cruz, J.J., Tolhurst, T.J., Underwood, A.J.   +3 more
core   +1 more source

Relationship between chlorophyll a pigment and algal geometric biovolume determination in a floodplain lake (Ciénaga Ayapel, Córdoba-Colombia)

Revista Facultad de Ingeniería Universidad de Antioquia, 2012
The estimation of biomass of planktonic algae can be done by two methods, the quantification of geometric biovolume and chlorophyll a. This work which considers as environmental scenario the Ayapel-Cordoba flood-plain lake, introduces (presents) the two
Esnedy Hernández, Nestor Jaime Aguirre, Jaime Alberto Palacio   +2 more
doaj   +1 more source

Conversion of Chlorophyll b to Chlorophyll a and the Assembly of Chlorophyll with Apoproteins by Isolated Chloroplasts [PDF]

Plant Physiology, 1997
Abstract The photosynthetic apparatus is reorganized during acclimation to various light environments. During adaptation of plants grown under a low-light to high-light environment, the light-harvesting chlorophyll a/b-protein complexes decompose concomitantly with an increase in the core complex of photosystem II.
T., Ohtsuka, H., Ito, A., Tanaka
openaire   +2 more sources

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. [PDF]

, 1989
During 1986 planktonic primary production and controlling factors were investigated in a small (A0 = 11.8 · 103 m2, Zmax = 11.5 m) meromictic kettle lake (Mittlerer Buchensee).
A. Bricaud, A. E. Walsby, A. Rebsdorf, B. Eichler, C. J. Lorenzen, C. L. M. Steenbergen, C. S. French, D. E. Caldwell, E. A. Nusch, E. J. Fee, E. Steemann-Nielsen, G. A. Dubinina, G. Ahlgren, G. J. Brunskill, H. Biebl, H. Gemerden v., J. E. Cloern, J. F. Talling, J. F. Talling, J. F. Talling, J. G. Kuenen, J. Overmann, J�rg Overmann, M. J. Perry, M. M. Tilzer, M. M. Tilzer, M. M. Tilzer, M. M. Tilzer, M. M. Tilzer, M. Takahashi, M.-E. Meffert, Max M. Tilzer, N. Caraco, R. A. Moll, R. B. Williams, R. C. Smith, R. D. Parker, R. H. Foy, R. O. Megard, R. Y. Stanier, Schanz, T. B. Parkin, T. B. Parkin, T. G. Coon, T. T. Bannister, U. Einsle, U. Einsle, Z. Dubinsky, Z. Dubinsky   +48 more
core   +1 more source