Results 271 to 280 of about 78,268 (305)

Trophic Levels and Functional Feeding Groups of Macroinvertebrates in Neotropical Streams

Hydrobiologia, 2006
Feeding strategies are typical traits reflecting the adaptation of species to environmental conditions. This concept is currently developed in some water quality systems (e.g. Index of Trophic completeness) and the structure of functional feeding groups (FFGs) could form part of a unified measure across communities differing in taxonomic composition ...
Sylvie Tomanova, Edgar Goitia, Jan Helešic   +2 more
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Nematodes and their relationship to forest dynamics: I. Species and trophic groups

Biology and Fertility of Soils, 1996
Nematode populations were studied in parallel with successional stages of forest dynamics (clearing, growth, mature and senescence phases) in a nature reserve within the state forest of Fontainebleau (La Tillaie, France). Soil conditions were identical in all habitats (acid mull).
I. Armend�riz, P. Arpin
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[Cellulase activity of Ceratocystis sp. of different trophic groups].

Mikrobiolohichnyi zhurnal (Kiev, Ukraine : 1993), 2010
A comparative analysis of cellulase activity of 36 fungal strains of phytopathogenic and endophytic Ceratocystis sp. was conducted. The rate of their linear growth on the media with carboxymethylcellulose was studied. It was shown that the rate of linear growth of phytopathogenic strains on the media with carboxymethylcellulose was lower than that in ...
I M, Kurchenko, O V, Sokolova, O M, Iur'ieva, N M, Zhdanova   +3 more
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The Spatial Distribution of Nematode Trophic Groups Across a Cultivated Ecosystem

Ecology, 1995
In order to better understand the spatial distributions of soil trophic groups and the potential significance of these distributions to ecosystem functioning we initiated a study to describe the within—site variability of nematode feeding groups in a row—crop ecosystem. Soil cores were removed from a 48—ha corn (Zea mays) field in the U.S.
G. Philip Robertson, Diana W. Freckman
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Report of the Southeast Trophic Ecology and Ecosystem Modeling Working Group

2022
NOAA technical memorandum NMFS-SEFSC ...
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Trace elements in organisms of different trophic groups in the White Sea

Oceanology, 2015
Concentrations of trace elements (Fe, Mn, Cu, Pb, Ni, Cr, Cd, As, Co, and Se) have been studied in different trophic groups of organisms: primary producers (seston, presented mostly by phytoplankton), primary consumers (mesozooplankton, macrozooplankton, and bivalves), secondary consumers (predatory macrozooplankton and starfish), and consumers of ...
D. F. Budko, L. L. Demina, D. M. Martynova, O. M. Gorshkova   +3 more
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Impact of floor vegetation on the abundance of nematode trophic groups in vineyards

Applied Soil Ecology, 2009
Abstract This study examined the effect of two floor vegetation management strategies on the abundance of nematode trophic groups in two Australian vineyards (one cool and one warm climate) for three consecutive years. Throughout the grape growing season floor vegetation was managed either as a perennial sward by regular mowing/snipping (permanent ...
L. Rahman, M.A. Whitelaw-Weckert, R.J. Hutton, B. Orchard   +3 more
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Nematode trophic groups enhance nitrogen transformations in soil ecosystems

Nematology
Summary Trophic groups are the foundation of nematode ecological classification, providing a meaningful context for examining spatial relationships and community assembly among different species that occur in the same habitat.
Reza Ghaderi, Xiaoke Zhang, Helen L. Hayden, Ji-Zheng He   +3 more
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[Polygalacturonase activity of microscopic fungi of different trophic groups].

Mikrobiolohichnyi zhurnal (Kiev, Ukraine : 1993), 2013
A comparative study of polygalacturonase activity of 85 saprophytic, plant pathogenic and endophytic strains of Fusarium poae, Alternaria alternata, Penicillium funiculosum and Mycelia sterilia was conducted. It was established that in general polygalacturonase activity of Mycelia sterilia and P.
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An Ecosystem-Level Trophic-Group Arthropod and Nematode Bioenergetics Model

1979
The purpose of this chapter is to describe a systems model which uses data on arthropods, nematodes, plants, other organisms, and weather to simulate energy flow involving invertebrates in the ecosystem. This model was used for the invertebrate computations included in Chapter 5.
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