Papers by Hassane Ouédraogo
Senegalia macrostachya is a wild crop with socioeconomic potentials across West Africa. This stud... more Senegalia macrostachya is a wild crop with socioeconomic potentials across West Africa. This study
aims to assess the impact of land use on the regeneration patterns of the species according to
climate zones in Burkina Faso. A total of 193 rectangular plots were sampled in farmlands, fallows
and protected areas across the Sudano-sahelian and Sudanian climate zones. The size and population
parameters of juveniles, as well as the mechanisms of regeneration were assessed and
compared among land use types, climate zones, and regeneration mechanisms using ANOVA
followed by Tukey’s HSD and a chi-square test. Density of juveniles was significantly higher
(p < 0.001) in protected areas (223.93 ± 122.45 individuals per ha) than in fallows
(106.79 ± 57.22) and farmlands (64.39 ± 57.57). The height of juveniles was significantly higher
(p < 0.001) in the Sudanian zone (0.70 ± 0.44 m) than in the Sudano-sahelian zone
(0.42 ± 0.15 m). The largest collar diameter (14.61 ± 7.23 mm) observed in the farmlands varied
significantly between climate zones. The distribution of the diameter size class revealed stable
juvenile populations. Diameter classes of less than 1 cm exhibited the highest densities. As far as
the regeneration mechanism is considered, Senegalia macrostachya regenerated mainly by
sprouting stumps in farmlands (84.82 %) and fallows (47.72 %) and by seedlings (65.58 %) and
suckering (27.53 %) in protected areas. The results prove that Senegalia macrostachya has a good
natural regeneration potential that can be promoted for sustainable management and conservation
of the species in agroforestry systems. The strategy could be assisted natural regeneration,
which is low cost and easy to practice by local populations.
Global Ecology and Conservation, 2023
As the dominant woody species of some hills, the conservation of Boswellia dalzielii Hutch. could... more As the dominant woody species of some hills, the conservation of Boswellia dalzielii Hutch. could
contribute to preserve vegetation of these azonal ecosystems, but also to restore degraded ones.
However, given the topographical variation in hills, understanding the effects of such variation on
the stand structure of B. dalzielii can assist the sustainable management of the species and
therefore that of the hills. This paper compared the floristic diversity and the population characteristics
of B. dalzielii natural stands across four topographical units: eastern and western slopes,
hilltops, and plains. Data were collected from 80 plots of 50 m × 30 m equally distributed among
the four topographical units in natural stands of B. dalzielii across the Sudano-Sahelian zone of
Burkina Faso. The topographical units were compared based on woody species diversity. Additionally,
B. dalzielii trees density, stem diameter, slenderness coefficient and tree diameter and
height size class distribution were compared among the topographical units. A total of 3481 trees
representing 74 species distributed into 51 genera and 25 families were recorded. Woody species
richness varied slightly but was higher on the plains (62 species) than on slopes (west: 50 and
east: 53 species) and hilltops (55 species). The dissimilarity between the four units in terms of
species composition was low (R = 0.161, p = 0.001). Trees density of B. dalzielii was two to eight
times higher on eastern slopes (374.3 ± 255.5 trees/ha) than on hilltops (181.3 ± 118.7),
western slopes (138.3 ± 132.2) and plains (45.0 ± 22.5). The largest trees were found on the
western slopes (dbh = 27.4 ± 10.3 cm) while the smallest were found on the plains (dbh = 6.5 ±
1.4 cm). About all trees found in the study area, the slenderness coefficient was < 75%, indicating
low risk or susceptibility to windthrow. The stem diameter distribution exhibited a clear stable
population of B. dalzielii in all units, but with recruitment difficulties. Our findings suggest that
assisted natural regeneration actions are needed, especially in the plains and hilltops to assist the
restoration of hills vegetation and to create refuge environments for biodiversity.
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Papers by Hassane Ouédraogo
aims to assess the impact of land use on the regeneration patterns of the species according to
climate zones in Burkina Faso. A total of 193 rectangular plots were sampled in farmlands, fallows
and protected areas across the Sudano-sahelian and Sudanian climate zones. The size and population
parameters of juveniles, as well as the mechanisms of regeneration were assessed and
compared among land use types, climate zones, and regeneration mechanisms using ANOVA
followed by Tukey’s HSD and a chi-square test. Density of juveniles was significantly higher
(p < 0.001) in protected areas (223.93 ± 122.45 individuals per ha) than in fallows
(106.79 ± 57.22) and farmlands (64.39 ± 57.57). The height of juveniles was significantly higher
(p < 0.001) in the Sudanian zone (0.70 ± 0.44 m) than in the Sudano-sahelian zone
(0.42 ± 0.15 m). The largest collar diameter (14.61 ± 7.23 mm) observed in the farmlands varied
significantly between climate zones. The distribution of the diameter size class revealed stable
juvenile populations. Diameter classes of less than 1 cm exhibited the highest densities. As far as
the regeneration mechanism is considered, Senegalia macrostachya regenerated mainly by
sprouting stumps in farmlands (84.82 %) and fallows (47.72 %) and by seedlings (65.58 %) and
suckering (27.53 %) in protected areas. The results prove that Senegalia macrostachya has a good
natural regeneration potential that can be promoted for sustainable management and conservation
of the species in agroforestry systems. The strategy could be assisted natural regeneration,
which is low cost and easy to practice by local populations.
contribute to preserve vegetation of these azonal ecosystems, but also to restore degraded ones.
However, given the topographical variation in hills, understanding the effects of such variation on
the stand structure of B. dalzielii can assist the sustainable management of the species and
therefore that of the hills. This paper compared the floristic diversity and the population characteristics
of B. dalzielii natural stands across four topographical units: eastern and western slopes,
hilltops, and plains. Data were collected from 80 plots of 50 m × 30 m equally distributed among
the four topographical units in natural stands of B. dalzielii across the Sudano-Sahelian zone of
Burkina Faso. The topographical units were compared based on woody species diversity. Additionally,
B. dalzielii trees density, stem diameter, slenderness coefficient and tree diameter and
height size class distribution were compared among the topographical units. A total of 3481 trees
representing 74 species distributed into 51 genera and 25 families were recorded. Woody species
richness varied slightly but was higher on the plains (62 species) than on slopes (west: 50 and
east: 53 species) and hilltops (55 species). The dissimilarity between the four units in terms of
species composition was low (R = 0.161, p = 0.001). Trees density of B. dalzielii was two to eight
times higher on eastern slopes (374.3 ± 255.5 trees/ha) than on hilltops (181.3 ± 118.7),
western slopes (138.3 ± 132.2) and plains (45.0 ± 22.5). The largest trees were found on the
western slopes (dbh = 27.4 ± 10.3 cm) while the smallest were found on the plains (dbh = 6.5 ±
1.4 cm). About all trees found in the study area, the slenderness coefficient was < 75%, indicating
low risk or susceptibility to windthrow. The stem diameter distribution exhibited a clear stable
population of B. dalzielii in all units, but with recruitment difficulties. Our findings suggest that
assisted natural regeneration actions are needed, especially in the plains and hilltops to assist the
restoration of hills vegetation and to create refuge environments for biodiversity.
aims to assess the impact of land use on the regeneration patterns of the species according to
climate zones in Burkina Faso. A total of 193 rectangular plots were sampled in farmlands, fallows
and protected areas across the Sudano-sahelian and Sudanian climate zones. The size and population
parameters of juveniles, as well as the mechanisms of regeneration were assessed and
compared among land use types, climate zones, and regeneration mechanisms using ANOVA
followed by Tukey’s HSD and a chi-square test. Density of juveniles was significantly higher
(p < 0.001) in protected areas (223.93 ± 122.45 individuals per ha) than in fallows
(106.79 ± 57.22) and farmlands (64.39 ± 57.57). The height of juveniles was significantly higher
(p < 0.001) in the Sudanian zone (0.70 ± 0.44 m) than in the Sudano-sahelian zone
(0.42 ± 0.15 m). The largest collar diameter (14.61 ± 7.23 mm) observed in the farmlands varied
significantly between climate zones. The distribution of the diameter size class revealed stable
juvenile populations. Diameter classes of less than 1 cm exhibited the highest densities. As far as
the regeneration mechanism is considered, Senegalia macrostachya regenerated mainly by
sprouting stumps in farmlands (84.82 %) and fallows (47.72 %) and by seedlings (65.58 %) and
suckering (27.53 %) in protected areas. The results prove that Senegalia macrostachya has a good
natural regeneration potential that can be promoted for sustainable management and conservation
of the species in agroforestry systems. The strategy could be assisted natural regeneration,
which is low cost and easy to practice by local populations.
contribute to preserve vegetation of these azonal ecosystems, but also to restore degraded ones.
However, given the topographical variation in hills, understanding the effects of such variation on
the stand structure of B. dalzielii can assist the sustainable management of the species and
therefore that of the hills. This paper compared the floristic diversity and the population characteristics
of B. dalzielii natural stands across four topographical units: eastern and western slopes,
hilltops, and plains. Data were collected from 80 plots of 50 m × 30 m equally distributed among
the four topographical units in natural stands of B. dalzielii across the Sudano-Sahelian zone of
Burkina Faso. The topographical units were compared based on woody species diversity. Additionally,
B. dalzielii trees density, stem diameter, slenderness coefficient and tree diameter and
height size class distribution were compared among the topographical units. A total of 3481 trees
representing 74 species distributed into 51 genera and 25 families were recorded. Woody species
richness varied slightly but was higher on the plains (62 species) than on slopes (west: 50 and
east: 53 species) and hilltops (55 species). The dissimilarity between the four units in terms of
species composition was low (R = 0.161, p = 0.001). Trees density of B. dalzielii was two to eight
times higher on eastern slopes (374.3 ± 255.5 trees/ha) than on hilltops (181.3 ± 118.7),
western slopes (138.3 ± 132.2) and plains (45.0 ± 22.5). The largest trees were found on the
western slopes (dbh = 27.4 ± 10.3 cm) while the smallest were found on the plains (dbh = 6.5 ±
1.4 cm). About all trees found in the study area, the slenderness coefficient was < 75%, indicating
low risk or susceptibility to windthrow. The stem diameter distribution exhibited a clear stable
population of B. dalzielii in all units, but with recruitment difficulties. Our findings suggest that
assisted natural regeneration actions are needed, especially in the plains and hilltops to assist the
restoration of hills vegetation and to create refuge environments for biodiversity.