Landscape Models of Brook Trout Abundance and Distribution in Lotic Habitat with Field Validation

En este ensayo se analiza la contribución de la ‘ecología del paisaje’ al conocimiento de la dinámica espacial de los organismos con énfasis en el área de la entomología aplicada. Esta es una disciplina de investigación relativamente nueva en la ecología que estudia el efecto de la estructura de los paisajes sobre la abundancia y distribución de los organismos; también se define como el estudio del efecto de los patrones espaciales y temporales sobre los procesos ecológicos. Los términos ‘estructura’ y ‘patrones’ involucran el concepto de ‘heterogeneidad espacial’, características abordadas con una serie de técnicas nuevas como modelos e índices espaciales. Estos avances pueden contribuir a entender la dinámica espacial y temporal de los insectos en los agroecosistemas y complementar los enfoques actuales de investigación y manejo de problemas fitosanitarios. El objetivo de este artículo es estimular en los gremios académicos y de investigación la discusión sobre las perspectivas de la aplicación de la ecología del paisaje en el área de la entomología aplicada. Views of landscape ecology in applied entomologyLandscape ecology is the study of how landscape structure affects the abundance and distribution of organisms. Also it is defined as the study of the effect of spatial and temporal pattern in ecological process. Structure and pattern terms include spatial heterogeneity, which are approached through series of new techniques and software. Relatively recent developments of many techniques, such as landscape models and metrics, enable ecologists to examine spatial and temporal patterns. This paper is aimed at stimulating discussion amongst academic and research groups concerning current and future issues in landscape ecology in applied entomology.

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Comparison of Brook Trout Abundance and Distribution in Vermont's Streams between the 1950s and the 2000s

Northeastern Naturalist ◽

10.1656/045.028.0208 ◽

2021 ◽

Vol 28 (2) ◽

Author(s):

Jud F. Kratzer ◽

Peter McHugh ◽

Richard Kirn ◽

William H. Eldridge

Keyword(s):

Brook Trout ◽

The 1950S ◽

Abundance And Distribution

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Effects of Fish Introductions and Hydroelectric Development on Fishes in the Kananaskis River System, Alberta

Journal of the Fisheries Research Board of Canada ◽

10.1139/f65-064 ◽

1965 ◽

Vol 22 (3) ◽

pp. 721-753 ◽

Cited By ~ 14

Author(s):

J. S. Nelson

Keyword(s):

Rainbow Trout ◽

Brown Trout ◽

Brook Trout ◽

Salmo Trutta ◽

Cutthroat Trout ◽

River System ◽

Hydroelectric Development ◽

Fish Introductions ◽

Longnose Suckers ◽

Abundance And Distribution

Changes occurred in the abundance and distribution of fishes in the Kananaskis River system, Alberta, in conjunction with fish introductions and hydroelectric development. Data from surveys from 1936 to 1961 indicate the probable chronology of events.Dolly Varden (Salvelinus malma), brook trout (S. fontinalis), cutthroat trout (Salmo clarkii), and rainbow trout (S. gairdneri) decreased in abundance, probably due to the introduction of brown trout (Salmo trutta), longnose suckers (Catostomus catostomus), and white suckers (C. commersonii), to the cooling of the Kananaskis River from reservoir construction, and to sport fishing. Hybridization between rainbow and cutthroat trout was also important in the decrease of the latter species. After introduction by man, brown trout, rainbow trout, longnose suckers, white suckers, lake chub (Hybopsis plumbea), and longnose dace (Rhinichthys cataractae) greatly increased in abundance. Prior to the increase in numbers of white suckers, a reduction in the numbers of longnose suckers occurred in Lower Kananaskis Reservoir. Little change in the distribution of mountain whitefish (Prosopium williamsoni), longnose dace, and brook sticklebacks (Culaea (= Eucalia) inconstans) occurred over the 25 years. Changes in the physicochemical environment and invertebrate fauna in the reservoirs appeared to be of secondary importance to the interaction among fish in causing the changes in species abundance and distribution.

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Summer bird abundance and distribution on set-aside fields on intensive arable farms in England

Ecography ◽

10.1034/j.1600-0587.2000.230106.x ◽

2000 ◽

Vol 23 (1) ◽

pp. 50-59 ◽

Cited By ~ 3

Author(s):

Ian G. Henderson ◽

Juliet A. Vickery ◽

Robert J. Fuller

Keyword(s):

Bird Abundance ◽

Abundance And Distribution

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ESTIMATION OF THE ABUNDANCE AND DISTRIBUTION OF RARE EARTH ELEMENTS IN SOIL AROUND KADUNA REFINING AND PETROCHEMICAL COMPANY USING NUCLEAR TECHNIQUE

FUDMA Journal of Sciences ◽

10.33003/fjs-2020-0402-243 ◽

2020 ◽

Vol 4 (2) ◽

pp. 599-604

Author(s):

Michael A. Onoja ◽

P. H. Bukar ◽

C. U. Omeje ◽

A. M. Adamu

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Nuclear Technique ◽

Flood Plains ◽

Economic Exploitation ◽

Rare Elements ◽

Petrochemical Company ◽

The Moment ◽

Abundance And Distribution ◽

Natural Pattern

Instrumental neutron activation analysis (INAA) technique was used to investigate the abundance and distribution of rare earth elements (REE) in soil around Kaduna Refinery. The aim of the study is to assess the rare elements potential of Nigeria for economic exploitation. Five REEs (La, Dy, Eu, Yb, and Lu) were detected in varying concentrations ranging from a minimum of 0.6 µg/g (Lu) to a maximum of 249.0 µg/g (La). The elements existed with trends consistent with the natural pattern of REEs in soil, showing significant Eu and Dy anomalies which characterize upper plains and flood plains. The levels of REEs in soil in the study area were generally slightly above background levels, with minimal (La, Dy, and Eu), moderate (Yb), and significant (Lu) enrichments and trending: Lu ˃Yb ˃ Eu ˃ Dy ˃ La. The abundance of the REEs investigated cannot establish a potential of Nigeria for economic exploitation of the mineral, hence, rare earth project in the study area is not viable at the moment.

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