Floristic diversity of Sehary Guebli forest (Djelfa, Algeria)

Agrarian Academic Journal

agrariacad.com

doi: 10.32406/v7n3/2024/43-56/agrariacad

 

Floristic diversity of Sehary Guebli forest (Djelfa, Algeria). Diversidade florística da floresta Sehary Guebli (Djelfa, Argélia).

 

Abdelkarim Rahmoune¹, Yassine Beghami², Kouider Hadjadj³

 

^1- Laboratory for Improvement of Agricultural Production and Protection of Ecosystems in Arid Zones, LAPAPEZA, ISVSA, University of Batna 1, Batna, Algeria. E-mail: abdelkarim.rahmoune@univ-batna.dz

^2- Laboratory for Improvement of Agricultural Production and Protection of Ecosystems in Arid Zones, LAPAPEZA, ISVSA, University of Batna 1, Batna, Algeria. E-mail: beghamiyassine@yahoo.fr

^3- Department of Agronomy. Laboratory of Sustainable Management of Natural Resources in Arid and Semi-arid zones, University Center of Naâma, Algeria. E-mail: hadjadj.kouider@cuniv-naama.dz

 

Abstract

 

This research focuses on the characterization of the floristic diversity of the Sehary Guebli forest. 60 phytoecological surveys were installed between 2016 and 2019. The identified species were characterized by their biological and geographical type. Among the species inventoried we have defined those rare, endemic and protected. In total, we have identified 125 species belonging to 96 genera and 34 botanical families. The biogeographic spectrum is marked by the dominance of the Mediterranean element with 83 taxa and the biological types reflects the dominance of therophytes (45.60%). The results obtained show the presence of 23 rare species, 61 very rare species, 14 endemic species and 4 protected species.

Keywords: Phytoecological surveys. Biogeographic spectrum. Biological types. Therophytes. Endemic species. Protected species.

 

 

Resumo

 

Esta investigação centra-se na caracterização da diversidade florística da floresta Sehary Guebli. Foram instalados 60 levantamentos fitoecológicos entre 2016 e 2019. As espécies identificadas foram caracterizadas quanto ao seu tipo biológico e geográfico. Dentre as espécies inventariadas definimos aquelas raras, endêmicas e protegidas. No total, identificamos 125 espécies pertencentes a 96 gêneros e 34 famílias botânicas. O espectro biogeográfico é marcado pela dominância do elemento mediterrâneo com 83 táxons e o espectro biológico reflete a dominância dos terófitos (45,60%). Os resultados obtidos mostram a presença de 23 espécies raras, 61 espécies muito raras, 14 espécies endémicas e 4 espécies protegidas.

Palavras-chave: Levantamentos fitoecológicos. Espectro biogeográfico. Tipos biológicos. Terófitos. Espécies endémicas. Espécies protegidas.

 

 

Introduction

 

With an area of 2.381,741 km², Algeria is the largest African and Mediterranean country (MATE, 2009; HADJADJ et al., 2019). The geographical location of Algeria between two floral empires: Holarctis and Paleotropis, gives it a very diverse flora describing 4449 species and subspecies of vascular plants mainly dominated by 3 botanical families with more than 150 species each: Asteraceae, Poaceae and Brassicaceae (433, 289 and 171 species, respectively), while 7 genera present between 30 and 58 species: Helianthemum, Linaria, Centaurea, Ononis, Trifolium, Astragalus, Silene (BENAISSA et al., 2018; HABIB et al., 2020).

The country contains a large number of species classified according to their degree of rarity (ZERAÏA, 1983). Rare taxa in Algeria vary according to biogeographic sectors (MIARA et al., 2017). More or less rare taxa, with an abundance ranging from AR to RRR in the sense of Quézel and Santa (1962-1963), number 1818 taxa across all biogeographic sectors of the country (VÉLA and BENHOUHOU, 2007). These indices, which are independent of the notion of endemism, need to be updated in the light of recent data (MIARA et al., 2017).

Among these species, 454 are protected by Executive Decree No. 12-03 of January 4, 2012 establishing the list of uncultivated and protected plant species such as: Pistacia atlantica Desf, Thymus lanceolatus, Acacia albida, Genista saharae… (JORA, 2012; GUERINE and HADJADJ, 2019; HADJADJ et al., 2022, HADJADJ et al., 2024).

The province of Djelfa is characterized by a diverse forest heritage mixed between natural and other artificial forests (KHADER et al., 2022). The natural forests are made up of six (6) very distinct massifs, with a total area of around 152,753 hectares (SOUTTOU et al., 2014). Among these massifs, it is worth mentioning that of Sehary Guebli which constitutes one of the most important natural Aleppo pine forests in the arid zones of the Algerian Saharan Atlas (GUIT and NEDJIMI, 2019).

In addition, the publication of regional floristic inventories seems necessary to update knowledge and data on the Algerian flora from a taxonomic and biogeographic point of view (MIARA et al., 2017). In this context falls our work which aims to study the flora of the Sehary Guebli forest.

 

Material and methods

 

1. Study zone

 

Our study area is located in the hunting reserve (Djelfa), it is located in the forest massif of Sehary Guebli. The area is located between the following coordinates (Figure 1):

• North latitude: 34°47′ 20” and 34°57′ 58”
• East longitude: 3°7’ 20’’ and 3°24’ 20’’

The study area occupies an area of 31.800,344 ha according to the senatus consult of the region (RAHMOUNE, 2018). This forest is located in an altitudinal range of 1000 m to 1450 m with slopes of around 40% at the summits and 5 to 20% at the bottom of the slopes (GUIT and NEDJIMI, 2019).

The Sehary Guebli forest massif belongs to the semi-arid bioclimatic stage, it is characterized by an average annual rainfall of 340 mm and an average annual temperature is 13.8 °C (GUIT and NEDJIMI, 2019; GUERINE et al., 2022). From a pedological point of view, the soils of Sehary Guebli are characterized by heterogeneity linked to the source rock and the topography, Rahmoune (2018) distinguishes two classes of soils: rendzines and brown limestone soils.

 

Figure 1 – Location of the study area.

 

The Sehary Guebli massif belongs to the North African steppe domain, the Saharan Atlas sector and the central Saharan Atlas sub-sector according to the geographical subdivisions of Mediterranean Africa and the Sahara developed by Quézel and Santa in 1962-1963. The vegetation of this forest is characterized from a physiognomic point of view by the presence of pure stands of Pinus halepensis Mill, stands of Pinus halepensis Mill mixed with Quercus ilex L.), Juniperus phoenicea L. and Juniperus oxycedrus L., and an steppe of Stipa tenacissima L (RAHMOUNE, 2018).

 

2. Methodology

 

60 phytoecological surveys were carried out during the growing period of 2016, 2017 and 2019 within the Sehary Guebli forest massif (Figure 2). Subjective sampling which takes into account the variability of the stands encountered was adopted. In accordance with the sigmatist method, the surveys were carried out on homogeneous areas from a physiognomic, floristic and ecological point of view whose surface area varies from 400 to 500 m² (GUINOCHET, 1973; DJEBAILI, 1984; OZENDA, 1991).

The botanical identification of the taxa was made on the basis of the new flora of Algeria and the southern desert regions (QUÉZEL and SANTA, 1962-1963), the flora of North Africa (MAIRE, 1952 – 1987), Flora and vegetation of the Sahara (OZENDA, 2004), the synonymous and bibliographical index of North African flora (DOBIGNARD and CHÂTELAIN, 2010-2013).

 

Figure 2 – Location of floristic surveys in the Sehary Guebli forest.

 

The inventoried species were defined by their biogeographic type reconstructed by Quézel and Santa (1962-1963) and Dobignard and Chatelain (2010-2013). For biological types, the classification to which we referred is that of Raunkiaer (1934), it is subdivided into: phanerophyte, chamaephyte, hemicryptophyte, therophyte and geophytes.

We attempted to evaluate the degree of disturbance exerted on the Sehary Guebli forest by calculating the perturbation index (PI) of Loisel and Gomilla (1993) which is expressed by the following formula: PI= (Number of Chaméphytes+Number of Thérophytes)/(Total number of species identified).

The characterization of rare species present on the site was carried out on the basis of rarity or vulnerability criteria established by Quézel and Santa (1962-1963), modified by Medjahdi et al. (2018). These criteria define rarity as follows:

RR: the species is considered very rare if it only occurs 1 to 2 times. A: Rare if found 3-5 times. C: Common if found 6 to 10 times. AC: Fairly common if found 11-20 times. CC: Very common if encountered more than 20 times.

The protected species were described according to Executive Decree No. 12-03 of January 4, 2012 establishing the list of non-cultivated and protected plant species in Algeria (J.O.R.A, 2012).

 

Results and discussion

 

1. Floristic diversity

 

The 60 surveys carried out in the Sehary Guebli forest massif made it possible to identify 125 species belonging to 96 genera and 34 botanical families (Table 1), which represents approximately 2.83% of the total Algerian flora estimated at 4449 species by Dobinard & Châtelain during the period 2010-2013 (HABIB et al., 2020). The most represented families are: Asteraceae 31 species (24.80%), Poaceae 13 species (10.40%), Fabaceae 13 species (10.40%), Lamiaceae 9 species (7.2%), Brassicaceae 7 species (5.6%). These families alone total 73 species, or 58.40% of the identified species.

Plantaginaceae and Cistaceae are represented by 4 species, i.e. a rate of 3.20%, while Resedaceae, Apiaceae, Asparagaceae, Caprifoliaceae, Caryophyllaceae and Liliaceae only record 3 species per family, i.e. 2.40%.

It also reveals that five families are represented by only two species and that the rest (16 families) are represented by only one species.

From the results obtained, we note the dominance of species belonging to the Asteraceae family. This remark is noted by Ozenda (1991) who indicates the dominance of Asteraceae, poacceae and brassicacceae in the arid and semi-arid zones of the Mediterranean.

In Algeria, recent research (KAZI-TANI et al., 2010; BENHAMICHE-HANIFI and MOULAI, 2012; BENKHETTOU et al., 2015; BENAISSA et al., 2018; GUIT and NEDJIMI, 2019; GHAFOUL et al., 2019; HABIB et al., 2020; HADJADJ et al., 2020; HADJADJ et al., 2021) highlighted the dominance of this botanical family. This observation is also distinguished in Morocco by Hseini et al., 2007; Fennane and Ibn Tattou, 2012; Alaoui and Laaribya, 2017; and in Tunisia by El Mokni and Hédi El Aouni, 2011; Gamoun et al., 2012.

 

Table 1 – List of species identified with biological and geographical type.

Families	Species	Biological type	Geographic type
ASTERACEAE	Andryala integrifolia L.	Th	Med
	Bellis annua L.	Th	Circum Med
	Leontodon saxatilis Lamk	Th	W. Méd.
	Anacyclus monanthos subsp. cyrtolepidioides (Pomel)	Th	End. N.A
	Artemisia campestris L.	Ch	Euras
	Artemisia herba-alba Asso	Ch	Med
	Atractylis phaeolepis Pomel	Ch	End AM
	Atractylis polycephala Coss.	Hc	End. N.A
	Atractylis cancellata L.	Th	Circum Med
	Atractylis caespitosa Desf	Hc	Méd.
	Calendula arvensis (Vaill.) L.	Th	Sah-Sind
	Carlina involucrata Poiret	Th	Euras-NA
	Carthamus lanatus L.	Th	Eur-Méd
	Catananche caerulea L.	Hc	Med
	Centaurea granatensis Boiss	Hc	Méd.
	Centaurea pubescens Willd	Ch	End AM
	Centaurea maroccana Ball	Th	Ibéro-Maur
	Centaurea parviflora Desf.	Ch	End Alg-Tun
	Cirsium echinatum (Desf.) DC	Ch	W. Méd
	Coronilla scorpioïdes Koch.	Th	Med
	Coronilla valentina L.	Th	Med
	Hedypnois rhagadioloides (L.) F. W. Schmidt	Th	Med
	Helichrysum stoechas (L.) Moench	Ch	W, Med
	Inula montana L.	Hc	Méd
	Jurinea humilis DC	Hc	W. Méd.
	Picris hispanica (Willd.) P.D. Sell	Hc	Med
	Leuzea conifera (L.) DC	Hc	W. Méd.
	Micropus bombycinus Lag	Th	Cosm.
	Pallenis spinosa (L.) Cass. subsp. spinosa	Ch	Med
	Filago argentea (Pomel) Chrtek & Holub	Th	N. ATrip
	Taraxacum laevigatum DC	Th	Med
FABACEAE	Argyrolobium uniflorum (Decne.) Jaub. & Spach	Hc	Sah
	Astragalus caprinus L.	Hc	Med
	Astragalus glaux L.	Hc	W. Méd
	Astragalus algerianus E. Sheld	Hc	Ibéro-Maur
	Dorycnium pentaphyllum Scop	Ch	Med
	Genista microcephala Coss. & Durieu	Nph	End. N.A
	Hippocrepis multisiliquosa L.	Th	Med
	Hippocrepis scabra DC	Th	Ibéro-Maur
	Medicago arabica (L.) Huds	Th	Med
	Medicago minima (L.) L.	Th	Eur-Méd
	Medicago laciniata (L.) All	Th	Méd.sah-sind
	Ononis pusilla L.	Ch	Med
	Trigonella stellata Forssk	Th	Sah-Sind
POACEAE	Ampelodesmos mauritanicus (Poir.) T. Durand & Schinz	Hc(Ge)	W, Med
	Aegilops triuncialis L. subsp. Triuncialis	Th	Méd -Irano Tour
	Rostraria festucoides (Link) Romero Zarco	Th	Med
	Bromus rubens L	Th	Trop
	Catapodium tenellum (L.) Trab	Th	Eur-Méd
	Ctenopsis pectinella (Delile) De Not.	Th	S. Méd
	Cynosurus elegans Desf.	Th	Méd.-Macar
	Dactylis glomerata L.	Hc	Paléo-temp
	Echinaria capitata (L) Desf	Th	Atl Méd
	Lagurus ovatus L.	Th	Atl Méd
	Poa bulbosa L. subsp. bulbosa	Th	Paléo-temp
	Stipa parviflora Desf.	Hc	Med
	Stipa tenacissima L.	Ge	Ibéro.-Maur.
LAMIACEAE	Sideritis incana subsp. atlantica (Pomel) Dobignard	Ch	End AM
	Sideritis montana L subsp. ebracteata  (Asso) Murb	Th	Med
	Rosmarinus officinalis L.	Nph	Med
	Rosmarinus tournefortii de Noé	Ph	End AM
	Salvia verbenaca L.	Hc	Atl Méd
	Teucrium polium L.	Hc	Med
	Thymus algeriensis Boiss. & Reut.	Ch	End. N.A
	Thymus ciliatus Desf.	Ch	End. N.A
	Ziziphora hispanica L.	Th	Ibéro.-Maur
BRASSICACEAE	Hormathophylla cochleata (Coss. & Durieu) P.Küpfer	Hc	End AM
	Alyssum granatens Boiss. et Reut	Th	Euras
	Alyssum linifolium Willd	Th	Méd.-Iran-Tou
	Diplotaxis erucoides (L.) DC	Th	Méd
	Arabis auriculata Lam	Th	Med
	Eruca vesicaria (L.) Cav.	Th	Med
	Malcolmia arenaria (Desf.) DC	Th	End AM
PLANTAGINACEAE	Plantago albicans L.	Hc	Med
	Plantago lagopus L.	Th	Med
	Globularia alypum L.	Ch	Med
	Anarrhinum fructicosum Desf	Hc	Med
CISTACEAE	Cistus clusii Dunal	Nph	Med
	Cistus salviifolius L.	Ch	Méd.
	Cistus villosus L.	Ph	Med
	Helianthemum cinereum (Cav.) Pers	Ch	Eur. Med, N.A
RESEDACEAE	Reseda alba L. subsp. alba	Th	Euras.
	Reseda arabica Boiss	Th	Sah. Sind
	Reseda lutea L. subsp. lutea	Th	Eur-Méd
APIACEAE	Daucus carota L.	Th	W, Med
	Eryngium campestre L.	Th	Eur-Méd
	Thapsia villosa L.	Ge	Med
ASPARAGACEAE	Muscari neglectum Guss. ex Ten.	Ge	Eur-Med
	Asparagus acutifolius L.	Ph	Med
	Ruscus aculeatu L.	Ch	Atl. Méd
CAPRIFOLIACEAE	Lonicera implexa L.	Ph	Med
	Sixalix atropurpurea (L.) Greuter & Burdet	Th	Med
	Lomelosia stellata (L.)	Th	W, Med
LILIACEAE	Asphodelus microcarpus Salzm. et Viv	Ge	Canar.Méd
	Asphodelus tenuifolius Cav	Ge	Macar.Méd
	Tulipa sylvestris L.	Ge	Eur-Méd
CARYOPHYLLACEAE	Paronychia arabica (L.) DC	Th	Med
	Paronychia argentea Lam.	Hc	Med
	Paronychia capitata (L.) Lam	Th	Med
RANUNCULACEAE	Ranunculus paludosus Poir.	Hc	Med
	Ranunculus repens L.	Hc	Paléo-temp
ANACARDIACEAE	Pistacia lentiscus L.	Ph	Med
	Pistacia theribinthus L.	Ph	Med
CUPRESSACEAE	Juniperus oxycedre L.	Ph	Circum Med
	Juniperus phoenicea L.	Ph	Circum Med
RUTACEAE	Haplophyllum linifolium (L.) G. Don	Ch	Ibéro-Maur.
	Ruta montana L.	Ch	Méd
OLEACEAE	Phillyrea latifolia L.	Ph	Med
	Jasminum fruticans L.	Ph	Med
ORCHIDACEAE	Orchis anthropophora (L.) All	Ge	Atl. Méd
GERANIACEAE	Erodium laciniatum (Cav.) Willd	Th	Med
LINACEAE	Linum tenue Desf.	Th	End Algerie, Maroc, Péninsule Ibérique
PRIMULACEAE	Lysimachia arvensis (L.) U. Manns & Anderb.	Th	Sub. cosmop
RUBIACEAE	Crucianella angustifolia L.	Th	Eur-Méd
RAFFESIACEAE	Cytinus hypocistis (L.)	Ge (parasite)	Med
EUPHORBIACEAE	Euphorbia falcata L.	Th	Med
MALVACEAE	Malva aegyptia L.	Th	Méd-Sah-Sind
BORAGINACEAE	Ogastemma pusillum (Coss. & Durieu ex Bonnet & Barratte) Brummitt	Th	End Sah
AMARYLLIDACEAE	Narcissus cantabricus DC	Ge	End Algerie, Maroc, Péninsule Ibérique
PAPAVERACEAE	Papaver rhoeas L.	Th	Med
PINACEAE	Pinus halepensis Mill	Ph	Med
FAGACEAE	Quercus ilex subsp. ballota (Desf.) Samp	Ph	Med
CRASSULACEAE	Sedum sediforme (Jacq.) Pau	Ch	Med
THYMELEACEAE	Thymelaea argentata (Lam.) Pau	Ch	Ibéro-Maur
VALERIANACEAE	Valerianella coronata (L.) DC	Th	Med

 

2. Biogeographic types

 

The biogeographic study of plants is considered as a criterion for evaluating biological diversity (QUÉZEL and BARBERO, 1993). The biogeographic spectrum of the taxa inventoried (Table 2) is marked by the dominance of the Mediterranean element with 83 taxa, which represent 66.80% of the entire flora studied. Widely distributed taxa occupy the second position with 21 taxa or 16.80%. Endemic species come in third position with 15 species (12%), two thirds of which (66.66%) are Algerian-Moroccan (5 species) and North African (5 species). Finally, the Nordic set is the least represented, it only has 6 species (4.80%).

 

Table 2 – Geographic types of species.

Chorological sets	Number	%	Chorological sets	Number	%
Mediterranean set	83	66,40 %	WIDE DISTRIBUTION AND COSMOPOLITANS	21	16,80 %
Mediterranean	53		Cosmopolitans	2
West Mediterranean	9		Mediterranean-Atlantic	5
South Mediterranean	1		Macaronesian-Mediterranean	2
Circum-Mediterranean	4		Eurasian. North African. Tripoli	2
Iberomauretanian	7		Tropical Mediterranean	1
Eurymediterranean	9		Canarian-Mediterranean	1
ENDEMIC	15	12 %	Mediterranean-Iranian-Turanian	2
Endemic	1		Saharan	1
North African	5		Sahara – Sindian	3
Algerian-Moroccan	5		Mediterranean, Sahara – Sindian	2
Algerian-Tunisian	1		Nordic Set	6	4,80 %
Algeria, Morocco, Iberian Peninsula	2		Eurasian	3
Sahara	1		Paleotemperate	3

 

3. Biological types

 

According to Raunkiaer’s classification (1934), which provides information on the adaptive behavior of the species during the difficult period, the diagram of the biological types of the inventoried species is: Therophytes > Hemicryptophytes > Chamephytes > Phanerophytes > Geophytes > Nanophanerophytes (Figure 3). We record a predominance of therophytes which alone constitute a little half of all the identified flora, with a rate of 45.60%. In second place come the hemicryptophytes which are represented by 23 taxa or a rate of 18.40%. Chamephytes occupy third position with a rate of 16.80%. These three biological types (therophytes, hemicryptophytes, chamephytes) represent a majority category compared to other biological types, their cumulative rate is estimated at 80.80%. The rest of the species belong to the phanerophytes with a rate of 9.60%, geophytes with 7.20% and nanophanerophytes with 2.40%.

The dominance of therophytes is a characteristic of Mediterranean arid zones (GRIME et al., 1988; BONNET et al., 1999). Indeed, therophyty is a form of resistance to drought as well as high temperatures in arid environments (KADI-HANIFI, 1988; BARBERO et al.,1990; DAGET and GODRON, 1995).

 

4. Perturbation index

 

The disturbance index calculated for our study area is 55%. This index, which is around 50%, thus explains an average degradation of the plant formations studied mainly under the effect of anthropogenic action.

The disturbance of the Séhary Guebli forest massif is illustrated by the proliferation of expansionist species such as: Asphodelus microcarpus Salzm. et Viv and Asphodelus tenuifolius Cav, species toxic to livestock such as: Thapsia villosa L and thorny species without pastoral interest such as: Atractylis caespitosa Desf, Atractylis phaeolepis Pomel, Atractylis cancellata L, Pallenis spinosa (L.) Cass. subsp. spinosa.

In addition, the proliferation of Poaceae which represents 10.40% of all identified flora could be considered as an indicator of overgrazing. This observation is similar to that of Bouazza et al. (2001), Catorci et al. (2011), Ghiloufi et al. (2016).

 

Figure 3 – Biological types of species inventoried in our study area.

 

5. Rare, endemic and protected taxa

 

The rarity rate is quite high, in our study area, it represents 67.2% of the total flora of the study area and 4.62% of the rare flora of Algeria represented by 1818 species by Vela and Benhouhou (2007). We distinguish:

– 23 rare species (R), or 18.4% of the total flora of the study area. Among these species we cite: Ononis pusilla L, Ampelodesmos mauritanicus (Poir.) T. Durand & Schinz, Paronychia argentea Lam., Artemisia herba alba Asso, Asparagus acutifolius L, Astragalus glaux L, Carthamus lanatus L…

– 61 very rare (RR) species, which represents 48.8% of the identified flora. We mention as an example: Catapodium tenellum (L.) Trab, Catananche caerulea L, Centaurea maroccana Ball, Cirsium echinatum (Desf.) DC, Coronilla valentina L, Crucianella angustifolia L, Ctenopsis pectinella (Delile) De Not…

In terms of common, fairly common and very common species, we report the presence of:

– 15 common species (C): i.e. less than 12% of the identified flora (Cistus salviifolius L, Diplotaxis erucoides (L.) DC, Erodium laciniatum (Cav.) Willd, Jasminum fruticans L, Ziziphora hispanica L, Paronychia capitata (L.) Lam …).

– 8 fairly common species (AC): a percentage of 6.4% (Andryala integrifolia L, Artemisia campestris L, Asphodelus microcarpus Salzm. et Viv, Astragalus caprinus L, Centaurea parviflora Desf, Dactylis glomerata L, Paronychia arabica (L.) DC, Thymus algeriensis Boiss. & Reut.).

– 18 very common species (CC): which represents 14.4% (Pinus halepensis Mill, Stipa parviflora Desf., Bromus rubens L, Cistus salviifolius L, Cistus villosus L, Globularia alypum L, Phillyrea angustifolia L…).

In terms of endemism, we report the presence of 14 endemic species including:

– 5 endemic North African species: Anacyclus monanthos subsp. cyrtolepidioides (Pomel), Atractylis polycephala Coss, Genista microcephala Coss. & Durieu, Thymus algeriensis Boiss. & Reut, Thymus ciliatus Desf.

– 5 endemic Algerian-Moroccan species: Centaurea pubescens Willd, Atractylis phaeolepis Pomel, Sideritis incana subsp. atlantica (Pomel) Dobignard, Rosmarinus tournefortii de Noé, Malcolmia arenaria (Desf.) DC

– 1 Algerian-Tunisian endemic species: Centaurea parviflora Desf.

– 2 endemic species Algeria, Morocco, Iberian Peninsula: Linum tenue Desf, Narcissus cantabricus DC.

 – 1 endemic species of the Sahara: Ogastemma pusillum (Coss. & Durieu ex Bonnet & Barratte) Brummitt.

The recorded endemism rate represents 11.2% of the total flora identified in the study area and 3% of Algeria which offers 464 endemic taxa (VELA and BENHOUHOU, 2007).

The number of protected taxa is 4, or 3.2% of the total flora of the Sehary Guebli forest and 0.88% of the species protected in Algeria. These species are: Bellis annua L, Teucrium polium L, Juniperus oxycedre L, Juniperus phoenicea L.subsp. phoenicea.

 

Conclusion

 

This first contribution aimed to understand the floristic diversity of the Sehary Guebl forest which constitutes a significant fraction of the national forest domain of the wilaya of Djelfa (Algeria). The forest is distinguished by a mixture of stands, and by its fairly significant floristic diversity made up of 125 species belonging to 96 genera and 34 families.

In addition, the Sehary Guebl forest is characterized by an appreciable rate of rarity and also a remarkable rate of endemism, of which the North African and Algerian-Moroccan endemics represent the highest rates.

The dominance of therophytes (45.60%) demonstrates that anthropogenic action plays a major role in the vegetation dynamics in this forest. To this end, it is essential to integrate the human component into the development and sustainable management of this forest massif.

 

Interest conflicts

 

There was no conflict of interest between the authors.

 

Authors’ contributions

 

 All authors contributed equally for this work.

 

Bibliographic references

 

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Received on February 26, 2024

Returned for adjustments on August 5, 2024

Received with adjustments on August 6, 2024

Accepted on August 18, 2024

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