Floristic diversity of steppe vegetation in the region of Djelfa, North-West Algeria

Habib, Noureddine; Regagba, Zineb; Mıara, Mohamed Djamel; Hammou, Mohammed Ait; Snorek, Julie

doi:10.24310/abm.v45i.7987

Cited by 10 publications

(12 citation statements)

References 12 publications

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“…This clearly shows the degradation suffered by these plant formations and the importance of this index is proportional to the dominance of therophytes and chamaephytes which is the case for the study stations. For comparison, the perturbation index calculated by Mallem et al, (2017) in the Mokrane area (Laghouat, Algeria) and Habib et al, (2020) in the steppe region of Djelfa were respectively 66% and 59%. These results highlight the intensity of the disturbance in our study stations.…”

Section: Disturbance Indexmentioning

confidence: 92%

“…This observation is reported by Ozenda (1991) which indicates the dominance of Asteraceae, Poacceae and Brassicacceae in arid and semi-arid Mediterranean areas. In Algeria, the dominance of these botanical families is underlined by several authors (Boughani et al, 2009;Benabadji et al, 2010, Kazi-Tani et al, 2010Benkhettou et al, 2015;Benaissa et al, 2018;Guit and Nedjimi, 2019;Guerine and Hadjadj, 2019;Habib et al, 2020, Hadjadj et al, 2020.…”

Section: Table 1 Families and Species Inventoried In The Two Study St...mentioning

confidence: 97%

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Study of Plant Diversity in the Rangelands of Stipa Tenacissima L.: Case of Sfissifa and El Biodh Region (South West Algeria)

Guerine¹,

Hadjadj²,

Mouissa³

et al. 2022

CTNS

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The floristic diversity analysis made it possible to distinguish 42 species listed in 30 genera and 17 families in the Sfissifa station and 34 species classified in 23 genera and 15 botanical families in the El Biodh station. The most representative families in the Sifissifa station are: Asteraceae (14,28 %), Amaranthaceae (11,90 %), Brassicaceae (11,90 %), Poaceae (7,14 %), Lamiaceae (7,14 %) and Cistaceae (7,14 %). The dominant families in El Biodh station are Asteraceae (17,64 %), Poaceae (11,74 %), Amaranthaceae (8,82 %), Brassicaceae (8,82 %), Lamiaceae (8,82 %) and Cistaceae (8,82 %). The other remaining families have only one or two species with estimated rates ranging from 2,38 % to 4,76% in Sfissifa and 2,94 % to 5,88 % in El Biodh. The study of biological types shows the abundance of therophytes in the two stations with 42.86 % at Sfissifa and 50 % at El Biodh, which reflects the importance of the anthropologic action and the xericity of the climate. The analysis of the biogeographical spectrum shows the dominance of native species of the Mediterranean (19 species in Sfissifa and 15 species in El Biodh). The AHC analysis of the data revealed the main factors controlling the distribution of plant formations in the two studied stations including overgrazing, salinity and desertification. The combination of prolonged droughts and anthropogenic pressures exerted on the studied areas results in the extension of species of low pastoral value and the appearance of vast expanses of bare soil reaching the stage of desertification.

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Section: Disturbance Indexmentioning

confidence: 92%

Section: Table 1 Families and Species Inventoried In The Two Study St...mentioning

confidence: 97%

Study of Plant Diversity in the Rangelands of Stipa Tenacissima L.: Case of Sfissifa and El Biodh Region (South West Algeria)

Guerine¹,

Hadjadj²,

Mouissa³

et al. 2022

CTNS

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“…The high frequency of therophytes in anthropized areas could most probably be related to the strong anthropic pressure and to the di cult conditions of the environment in which they develop (Floret et al 1992). The latter include roadsides, house edges, rubble and wasteland (Habib et al 2020). These places are regularly trampled, reworked and poor (Belesi 2009).…”

Section: Autoecological Characteristicsmentioning

confidence: 99%

Ecofloristic characterization of medicinal flora of Kisantu and Mbanza-Ngungu territories, in Kongo-Central Province, DR Congo

Kembelo

Bakwaye

Katula

et al. 2023

Preprint

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We accessed the composition and dynamics of the vegetation in the Kisantu and Mbanza-Ngungu territories, as well as the distribution and availability of medicinal plants in their harvesting areas, using stigmatist and eco-floristic approaches. The flora was composed of 709 botanical species (113 families and 446 genera). The most abundant taxa were from Fabaceae family (14.8%), and used for medicinal purposes. Herbs (47.4%), pantropical (28.9%), phanerophytes (50.8%), species with sarcochorous diaspores (39.2%), with mesophilic leaves (49.08%) and species belonged to the Musango-Terminalietea (27.9%) group were the most dominant. The most abundant taxa were from dryland forests (45.4 ± 11.9.9) and anthropized formations (43.08 ± 11.4.4). Most species (62.04%) had a very restricted ecological niche, whereas 2.24%, had a very wide distribution. The highest similarity indices were observed, in descending order, between (1) dryland and swamp forests (KS: 70.7; JC: 26.1), (2) savannahs and dryland forests (KS: 55. 01; JC: 21.6), (3) anthropized formations and dryland forests (KS: 46.7; JC: 18.9), and (4) anthropized formations and savannahs (KS: 41.9; JC: 17.3). The Highest dissimilarity index was observed in anthropized formations (35%) and swamp forests (33%). Plant formations have a natural succession defined by vegetation dynamics from the pioneer stage to the climax stage. Field observations indicated that most habitats are degraded and that the availability of medicinal plants is decreasing. Adequate conservation measures, including in-situ and ex-situ methods are essential to promote and ensure the sustainable supply of medicinal plants to the communities that depend on these resources.

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“…The climate in this area is cold and semi-arid, characterized by the lowest precipitation seasonality, with high precipitation in the driest quarter and average precipitation in the wettest quarter. Precipitation decreases in the southern part, where steppes replace Mediterranean vegetation (Habib et al, 2020). South to the Cirtaic, the Saharan Atlas cluster (5) is located.…”

Section: Characterization Of Environmental Clustersmentioning

confidence: 99%

Environmental regionalization and endemic plant distribution in the Maghreb

Walas

Taib

2022

Environ Monit Assess

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Clustering methods based on environmental variables are useful in the planning of conservation strategies for species and ecosystems. However, there is a lack of work on the regionalization of the vast space of North Africa and the distribution of plant species. The current lists of endemic plants are focused mostly on an occurrence at the country level and not on regions with different conditions. The aim of this work was to lay out an environmental scheme for northwest Africa and to collect data about the occurrence of endemic plants in this area. Clustering with 12 of 33 tested environmental rasters was performed to divide the Maghreb into environmental clusters. Then, a list of 1618 endemic plant taxa (1243 species and 375 subspecies) was prepared and their distribution in estimated environmental clusters was examined. Eleven clusters with different conditions were estimated. The main drivers of regionalization were temperature amplitude, precipitation seasonality, and precipitation of the warmest quarter. According to the occurrence of endemic plants, northwest Africa may be divided into three zones: Atlas, Mediterranean (two environmental clusters), and southern zone (eight environmental clusters). The presented results provide a good basis for understanding the spatial patterns of the Maghreb, including its environment and species diversity. A designed list of endemic plant species together with environmental data may facilitate the planning of future research in north Africa and arranging methods of biodiversity protection.

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Floristic diversity of steppe vegetation in the region of Djelfa, North-West Algeria

Cited by 10 publications

References 12 publications

Study of Plant Diversity in the Rangelands of Stipa Tenacissima L.: Case of Sfissifa and El Biodh Region (South West Algeria)

Study of Plant Diversity in the Rangelands of Stipa Tenacissima L.: Case of Sfissifa and El Biodh Region (South West Algeria)

Ecofloristic characterization of medicinal flora of Kisantu and Mbanza-Ngungu territories, in Kongo-Central Province, DR Congo

Environmental regionalization and endemic plant distribution in the Maghreb

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