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1

Changes in the vegetation of softwater lakes under the influence of humic substances

100%
Bociag K., Szmeja J.
Polish Journal of Ecology
|
2001
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tom 49
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nr 4
2

Ecological and biological aspects of fish assemblage in the Chybayish marsh, Southern Iraq

84%
Mohamed A.-R. M., Hussain N. A., Al-Noor S. S., Mutlak F. M., Al-Sudani I. M., Mojer A. M.
International Journal of Ecohydrology and Hydrobiology
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2012
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tom 12
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nr 1
3

Vegetation landscape analysis due to land use changes on arid lands

84%
Manjarrez-Dominguez C., Pinedo-Alvarez A., Pinedo-Alvarez C., Villarreal-Guerrero F., Cortes-Palacios L.
Polish Journal of Ecology
|
2015
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tom 63
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nr 2
Fast land use changes have strongly affected arid and semi-arid regions at a global scale, affecting food security of the inhabitants of these regions. This study evaluated the fragmentation degree in the Chihuahua´s desert region of Mexico by using data from the Landsat TM sensor. Nine scenes, taken with Landsat TM5 sensor from the years 1990, 2000, and 2012, were used for the analysis. The coverage of seven land uses (grasslands, shrubland, croplands, sandy desert vegetation, forest, water bodies, and urban areas) was obtained under supervised classification techniques and the accuracy level was evaluated through the Kappa multi-varied discrete index. The classification showed a good reliance level having global accuracies of 93, 93.2 and 90.3% for the years 1990, 2000 and 2012, respectively. The fragmentation analysis showed an increase in the number of patches, an indicator of the ecosystem degradation process. The patches number increased from 8,354.23 in 1990 to 9,658.36 in 2000 and to 11,469 in 2012. Simpson and Shannon diversity indexes proved a clear fragmentation process. During the period of 1990−2012, grasslands were the most affected vegetation type with a reduction of 30.7% in its area. Such reduction was mainly attributed to invasions of shrubland communities and to an increase in cropland areas.
4
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Short-term variation of zooplankton community in Cintra Bay (Northwest Africa)

84%
Berraho A., Abdelouahab H., Baibai T., Charib S., Larissi J., Agouzouk A., Makaoui A.
Oceanologia
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2019
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tom 61
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nr 3
5

Effects of some abiotic factors on the occurrence of aquatic mycobiota in lakes of the Drawa National Park

67%
Mazurkiewicz-Zapalowicz K., Silicki A., Gregorczyk A., Biedunkiewicz A., Wolska M.
Oceanological and Hydrobiological Studies
|
2012
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tom 41
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nr 4
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Phytoplankton and environmental variables as a water quality indicator for the beaches at Matrouh, South-Eastern Mediterranean Sea, Egypt: an assessment

67%
Gharib S. M., El-Sherif Z. M., Abdel-Halim A. M., Radwan A. A.
Oceanologia
|
2011
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tom 53
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nr 3
This study was carried out to determine the water quality of the beaches at Matrouh, south-eastern Mediterranean Sea, Egypt, by studying environmental variables as well as phytoplankton abundance and community structure. Surface water samples were monitored from a series of beach sites over a period of five seasons during 2009–2010. A total of 203 phytoplankton species were identified from seven algal divisions. Seasonal differences in the quantitative and qualitative composition of the phytoplankton communities in the different sites were marked. Nutrient concentrations and phytoplankton abundances were found to be poorer than those of many other areas along Egyptian coast. The Shannon-Wiener Diversity Index classified Matrouh water as being between clean and moderately polluted, whereas the WQI demonstrated that it was between good and excellent. It can be concluded that the index based onWQI is currently more suitable than the phytoplankton species index for assessing the quality of the water of the Matrouh beaches.
7
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Analysis of the bacterial and fungal community profiles in bulk soil and rhizospheres of three mungbean [Vigna radiata (L.) R. Wilczek] genotypes through PCR-DGGE

67%
de los Reyes A. M. M., Ocampo E. T. M., Manuel M. C. C., Mendoza B. C.
International Letters of Natural Sciences
|
2020
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tom 77
Each plant species is regarded to substantially influence and thus, select for specific rhizosphere microbial populations. This is considered in the exploitation of soil microbial diversity associated with important crops, which has been of interest in modern agricultural practices for sustainable productivity. This study used PCR-DGGE (polymerase chain reaction - denaturing gradient gel electrophoresis) in order to obtain an initial assessment of the bacterial and fungal communities associated in bulk soil and rhizospheres of different mungbean genotypes under natural field conditions. Integrated use of multivariate analysis and diversity index showed plant growth stage as the primary driver of community shifts in both microbial groups while rhizosphere effect was found to be less discrete in fungal communities. On the other hand, genotype effect was not discerned but not inferred to be absent due to possible lack of manifestations of differences among genotypes based on tolerance to drought under non-stressed environment, and due to detection limits of DGGE. Sequence analysis of prominent members further revealed that Bacillus and Arthrobacter species were dominant in bacterial communities whereas members of Ascomycota and Basidiomycota were common in fungal communities of mungbean. Overall, fungal communities had higher estimated diversity and composition heterogeneity, and were more dynamic under plant growth influence, rhizosphere effect and natural environmental conditions during mungbean growth in upland field. These primary evaluations are prerequisite to understanding the interactions between plant and rhizosphere microorganisms with the intention of employing their potential use for sustainable crop production.
8
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Content available

Diversity of birds communities in the Vyhraivski Dachi tract on the gradient of forest transformation

67%
Gaychenko V., Shupova T., Cherniaiev O.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
|
2020
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tom 24
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Natural enemy (Arthropoda-Insecta) biodiversity in vegetable crops in Northeastern Tamil Nadu, India

51%
Anbalagan V., Paulraj M. G., Ignacimuthu S., Baskar K., Gunasekaran J.
International Letters of Natural Sciences
|
2016
|
tom 53
Natural enemies of insect pests in vegetable crops (brinjal, okra and tomato) were recorded and their diversity was studied in Kancheepuram and Tiruvallur Districts, Tamil Nadu. Natural enemies were collected by pitfall traps, sweeping nets and by hand picking from January 2011 to December 2013 twice in a month. Totally 129 species of predatory and parasitic insects were recorded. All the natural enemies were grouped into 50 families under eight different orders. Order hymenoptera contained the highest number of families and species. Among the predators, Coccinellidae (ladybird beetles) was found to be the dominant group with high number of species. It was clear that Coccinellidae, Staphylinidae, Carabidae and Pentatomidae were the predominant natural enemies throughout the study period. In 2013, formicidae formed the major family of occurrence from July to December in the vegetable fields; in this period the total number of individuals collected from all families was the highest. The maximum Shannon-Wiener diversity index was 3.70 during the second season in 2013. Maximum richness (5.99) was recorded in the second season of 2012. The variations in the diversity, species richness and evenness between two cropping systems are discussed in this paper.
10

Ocena zmian zachodzących w zgrupowaniach roztoczy z rzędu Mesostigmata (Arachnida, Acari) w różnych stadiach sukcesji ekologicznej zwałów kopalnictwa węglowego

43%
Madej G., Tomczok J.
Acta Biologica Silesiana
|
1990
|
tom 16
11

Zasiedlanie zwałowisk kopalnictwa węglowego przez roztocza z rzędu Mesostigmata (Arachnida, Acari). I. Charakterystyka zgrupowań

43%
Madej G.
Acta Biologica Silesiana
|
1990
|
tom 16
12

Zgrupowania mechowców (Oribatida) w zdegradowanych biotopach okolic Katowic

34%
Dziuba S., Skubala P., Rostowska M.
Acta Biologica Silesiana
|
1990
|
tom 16
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