EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Relationships between plant-parasitic nematode community, fallow duration and soil factors in the Sudano-Sahelian area of Senegal



Relationships between plant-parasitic nematode community, fallow duration and soil factors in the Sudano-Sahelian area of Senegal



Agriculture ecosystems and environment 10 108(4): 302-317



Before studying the mechanisms by which changes in vegetation influence the nematode community following abandonment of a field, it is necessary to first assess the impact of environmental factors such as soil or climate on these organisms. The study was undertaken on sites of increasing fallow duration located in the same area in the Sudano-Sahelian zone of Senegal: a forest and 10 fallow sites ranging from 1 to 18 years old. Soil samples were collected over 3 years on 17 occasions, along 21 m fixed transects, located in representative vegetation zones. Plant-parasitic nematodes were extracted, identified and enumerated from soil samples. The statistical analysis showed that the sites could be split in three groups according to the plant-parasitic nematode communities. One group, corresponding to young fallows, was characterised by large populations of Scutellonema cavenessi and Tylenchorhynchus gladiolatus. A second group included most of the older fallows and was characterised by a more diversified nematode community dominated by Helicotylenchus dihystera. The forest hosted a particular community partly similar to both of the other groups. Soil physical and chemical analysis split the sites into two groups, the young fallow sites plus the forest, and the older sites. The study of the annual changes revealed contradictory tendencies, such as a very small increase in T. gladiolatus and in the soil clay content, which suggest that the sampling technique had probably slightly influenced the results. If this did occur it did not change the effect of fallow duration on the nematode community. The process of decline of certain nematode populations seemed to be extremely slow and not detectable over three successive years. Nematode species were apparently able to reproduce for a long time on poor host plants, even if one plant cohort disappeared abruptly, as was the case when the field was not replanted. This study demonstrated that the soil had a greater influence on the nematode community structure than the annual climatic variations. Consequently, the soil effect will have to be mathematically considered in order to identify the mechanisms by which the plant communities progressively transform the nematode communities.

(PDF emailed within 0-6 h: $19.90)

Accession: 004298698

Download citation: RISBibTeXText

DOI: 10.1016/j.agee.2005.01.008



Related references

Nematode community changes and survival rates under natural fallow in the sudano-sahelian area of Senegal. Pedobiologia 47(2): 149-160, 2003

Effect of plant parasitic nematodes on the sustainability of a natural fallow cultural system in the Sudano-Sahelian area in Senegal. European Journal of Soil Biology 35(2): 91-97, 1999

An initial study of fallow periods on the nematode community in the Sudanese-Sahelian zone of Senegal. Acta Oecologica 16(1): 77-88, 1995

Effects of bare fallow on plant parasitic nematodes in the sahelian zone of senegal. Revue de Nematologie 9(1): 75-82, 1986

The female Zebus (Bos indicus) genital cycle in the Sudano-Sahelian area of Senegal. 1974

Determination of feed composition of cattle on Sudano-Sahelian pastures (Senegal) from the proportion of plant epidermis in the faeces. Annales de Zootechnie 42(2): 194-195, 1993

Potential role of live fences for nematode management on watersheds in the Senegalese sudano-sahelian area. 2007

Long-term effects of fallow, tillage and manure application on soil organic matter and nitrogen fractions and on sorghum yield under Sudano-Sahelian conditions. Soil Use and Management 21(1): 25-31, 2005

Influence of soil factors on the sugarcane plant parasitic nematode community in martinique west indies. Nematologica 36(4): 337, 1990

Problems posed by viral diseases in sheep in the Sahelian and Sudano-Sahelian area. Revue D'elevage et de Medecine Veterinaire des Pays Tropicaux 32(2): 123-129, 1979

Ticks and haemoparasitoses among livestock in Senegal. VI. The Sudano-Sahelian zone. Revue d' Elevage et de Medecine Veterinaire des Pays Tropicaux 47(1): 39-46, 1994

Sheep fattening techniques in the Sudano-Sahelian region of Senegal. Revue d' Elevage et de Medecine Veterinaire des Pays Tropicaux 45(3/4): 321-328, 1992

Soils of the Sudano-Sahelian region from Chad to Senegal; principles of their characterization and interpretation. Transactions Congress of the International Society of Soil Science, 1974

Effect of fallow improvement on the nematode community in the Sudanian region of Senegal. European Journal of Soil Biology il- e; 38(2): 205-211, 2002

Effect of fallow improvement on the nematode community in the Sudanian region of Senegal. European Journal of Soil Biology 38(2): 205-211, 2002