@article{fdi:010036665, title = {{R}elationships between plant-parasitic nematode community, fallow duration and soil factors in the {S}udano-{S}ahelian area of {S}enegal}, author = {{C}adet, {P}atrice and {M}asse, {D}ominique and {T}hioulouse, {J}.}, editor = {}, language = {{ENG}}, abstract = {{B}efore 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. {T}he study was undertaken on sites of increasing fallow duration located in the same area in the {S}udano-{S}ahelian zone of {S}enegal: a forest and 10 fallow sites ranging from {I} to 18 years old. {S}oil samples were collected over 3 years on 17 occasions, along 21 m fixed transects, located in representative vegetation zones. {P}lant-parasitic nematodes were extracted. identified and enumerated from soil samples. {T}he statistical analysis showed that the sites could be split in three groups according to the plant-parasitic nematode communities. {O}ne group, corresponding to young fallows, was characterised by large populations of {S}cutellonema cavenessi and {T}ylenchorhynchus gladiolatus. {A} second group included most of the older fallows and was characterised by a more diversified nematode community dominated by {H}elicotylenchus dihystera. {T}he forest hosted a particular community partly similar to both of the other groups. {S}oil physical and chemical analysis split the sites into two groups, the young fallow sites plus the forest. and the older sites. {T}he 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. {I}f this did occur it did not change the effect of fallow duration on the nematode community. {T}he process of decline of certain nematode populations seemed to be extremely slow and not detectable over three {S}uccessive years. {N}ematode 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. {T}his study demonstrated that the soil had a greater influence on the nematode community structure than the annual climatic variations. {C}onsequently, 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. (c) 2005 {E}lsevier {B}.{V}. {A}ll rights reserved.}, keywords = {fallow duration ; nematodes ; community ; soil interactions ; west {A}frica}, booktitle = {}, journal = {{A}griculture {E}cosystems and {E}nvironment}, volume = {108}, numero = {4}, pages = {302--317}, ISSN = {0167-8809}, year = {2005}, DOI = {10.1016/j.agee.2005.01.008}, URL = {https://www.documentation.ird.fr/hor/fdi:010036665}, }