4 research outputs found
Traditional orchards and drivers of reproductive performance in a Northern Algerian population of laughing doves (spilopelia senegalensis)
As a good example of species which have adapted in specific anthropogenic habitats as traditional orchards, we studied the breeding ecology of a northern Algerian population of Laughing Doves. We built multifactorial models for three components of Laughing Dove reproductive performance *clutch size, number of hatchlings, and number of fledglings* using generalized linear models (GLM). None of the studied factors: orchard type, laying period, nest location or nest size was affecting clutch size. Number of chicks hatched per nest was affected by orchards type and laying period. Based on model averaged estimates, the hatching success of Laughing Dove was negatively related to âolive orchards and early timing of breedingâ (ÎČ = â0.53; z = â2.16; p = 0.3). Whereas the number of chicks fledged per nest only differed with orchard type, and model averaged estimates showed a negative relation to olive orchards (ÎČ = â0.30 ± 0.17; z = â1.72, p = 0.28). No other variables, horizontal and vertical location or nest size, were related to the variation in breeding performance. So, we suggest that the main drivers of nest failures and reproductive performance of Laughing Doves were egg predation and other variables which are not investigated
Orchids of Souk-Ahras area (Northeast of Algeria): inventory, ecology, distribution and conservation concerns
La connaissance des orchidĂ©es de lâAlgĂ©rie a sĂ©rieusement progressĂ© ces derniĂšres annĂ©es, mais certaines rĂ©gions, comme celle de la wilaya de Souk-Ahras (nord-est de lâAlgĂ©rie), demeurent sous-prospectĂ©es. Cette Ă©tude est une approche phytoĂ©cologique qui a pour objectif dâamĂ©liorer la connaissance des orchidĂ©es de cette wilaya. Une sĂ©rie de prospections rĂ©alisĂ©e par les auteurs entre 2011 et 2015, sâest soldĂ©e par lâinventaire de 7 genres, comprenant 27 espĂšces/sous-espĂšces et 1 hybride. Certaines espĂšces prĂ©sentent une large distribution Ă travers le territoire de la wilaya, alors que dâautres sont trĂšs localisĂ©es. Seules 18 communes sur les 26 de la wilaya sont concernĂ©es par cette distribution et reprĂ©sentĂ©es par 73 stations incluant au moins une espĂšce dâorchidĂ©es. Parmi les taxons observĂ©s, sept sont qualifiĂ©s de rares ou trĂšs rares Ă lâĂ©chelle du pays, au moins trois sont des endĂ©miques algĂ©ro-tunisiens (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) et au moins trois sont menacĂ©s Ă lâĂ©chelle globale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). Les orchidacĂ©es de la wilaya de Souk-Ahras croissent souvent sur des sols calcaires, argileux ou siliceux, dans un bioclimat subhumide ou rarement semi-aride, Ă toutes les altitudes de la wilaya (500 Ă 1400 m). Cette variĂ©tĂ© dâespĂšces met en Ă©vidence la richesse taxinomique et confirme lâintĂ©rĂȘt de prospecter cette rĂ©gion nĂ©gligĂ©e par les orchidologues.Algerian orchids became better known during the last years, but certain regions, such as the province of Souk-Ahras (Northeast of Algeria), remain under-prospected. This study is a phytoecological approach, which aims to improve the knowledge of the orchids of this province. A series of targeted surveys has been realized between 2011 and 2015 when we were able to check 7 genera, including 27 species/subspecies and 1 hybrid. Some species are widely distributed throughout the province territory, while others are very localized. Only 18 municipalities among the 26 in the province are concerned by this distribution and are represented by 73 stations including at least one species of orchids. Among the observed taxa 7 are qualified as rare or very rare at national level, at least 3 are Algerian-Tunisian endemics (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) and at least 3 are threatened at global scale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). The orchids of Souk-Ahras province often grow on limestone, clayey or siliceous soils, in a subhumid bioclimate rarely semi-arid, at all altitudes of the province, from 500 to 1400 m. This variety of species highlights the taxonomic richness and confirms the interest of prospecting this region that was neglected by orchidologists
Les orchidées de la wilaya de Souk-Ahras (Nord-est algérien) : inventaire, écologie, répartition et enjeux de conservation
Orchids of Souk-Ahras province (Northeast of Algeria) : inventory, ecology, distribution and conservation concerns.
Algerian orchids became better known during the last years, but certain regions, such as the province of Souk-Ahras (Northeast of Algeria), remain under-prospected. This study is a phytoecological approach, which aims to improve the knowledge of the orchids of this province. A series of targeted surveys has been realized between 2011 and 2015 when we were able to check 7 genera, including 27 species/ subspecies and 1 hybrid. Some species are widely distributed throughout the province territory, while others are very localized. Only 18 municipalities among the 26 in the province are concerned by this distribution and are represented by 73 stations including at least one species of orchids. Among the observed taxa 7 are qualified as rare or very rare at national level, at least 3 are Algerian-Tunisian endemics (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) and at least 3 are threatened at global scale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). The orchids of Souk-Ahras province often grow on limestone, clayey or siliceous soils, in a subhumid bioclimate rarely semi-arid, at all altitudes of the province, from 500 to 1400 m. This variety of species highlights the taxonomic richness and confirms the interest of prospecting this region that was neglected by orchidologists.La connaissance des orchidĂ©es de lâAlgĂ©rie a sĂ©rieusement progressĂ© ces derniĂšres annĂ©es, mais certaines rĂ©gions, comme celle de la wilaya de Souk-Ahras (nord-est de lâAlgĂ©rie), demeurent sous-prospectĂ©es. Cette Ă©tude est une approche phytoĂ©cologique qui a pour objectif dâamĂ©liorer la connaissance des orchidĂ©es de cette wilaya. Une sĂ©rie de prospections rĂ©alisĂ©e par les auteurs entre 2011 et 2015, sâest soldĂ©e par lâinventaire de 7 genres, comprenant 27 espĂšces/sous-espĂšces et 1 hybride. Certaines espĂšces prĂ©sentent une large distribution Ă travers le territoire de la wilaya, alors que dâautres sont trĂšs localisĂ©es. Seules 18 communes sur les 26 de la wilaya sont concernĂ©es par cette distribution et reprĂ©sentĂ©es par 73 stations incluant au moins une espĂšce dâorchidĂ©es. Parmi les taxons observĂ©s, sept sont qualifiĂ©s de rares ou trĂšs rares Ă lâĂ©chelle du pays, au moins trois sont des endĂ©miques algĂ©ro-tunisiens (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) et au moins trois sont menacĂ©s Ă lâĂ©chelle globale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). Les orchidacĂ©es de la wilaya de Souk-Ahras croissent souvent sur des sols calcaires, argileux ou siliceux, dans un bioclimat subhumide ou rarement semi-aride, Ă toutes les altitudes de la wilaya (500 Ă 1400 m). Cette variĂ©tĂ© dâespĂšces met en Ă©vidence la richesse taxinomique et confirme lâintĂ©rĂȘt de prospecter cette rĂ©gion nĂ©gligĂ©e par les orchidologues.Boukehili Khouloud, Boutabia Lamia, Telailia Salah, Menaa Mohcen, Tlidjane Assma, Cherif Maazi Mohamed, Chefrour Azzedine, Saheb Menouar, VĂ©la Errol. Les orchidĂ©es de la wilaya de Souk-Ahras (Nord-est algĂ©rien) : inventaire, Ă©cologie, rĂ©partition et enjeux de conservation. In: Revue d'Ăcologie (La Terre et La Vie), tome 73, n°2, 2018. pp. 167-179
Orchids of Souk-Ahras province (Northeast of Algeria) : inventory, ecology, distribution and conservation concerns
Algerian orchids became better known during the last years, but certain regions, such as the province of Souk-Ahras (Northeast of Algeria), remain under-prospected. This study is a phytoecological approach, which aims to improve the knowledge of the orchids of this province. A series of targeted surveys has been realized between 2011 and 2015 when we were able to check 7 genera, including 27 species/subspecies and 1 hybrid. Some species are widely distributed throughout the province territory, while others are very localized. Only 18 municipalities among the 26 in the province are concerned by this distribution and are represented by 73 stations including at least one species of orchids. Among the observed taxa 7 are qualified as rare or very rare at national level, at least 3 are Algerian-Tunisian endemics (Ophrys battancheri, Ophrys numida, Orchis pauciflora subsp. laeta) and at least 3 are threatened at global scale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). The orchids of Souk-Ahras province often grow on limestone, clayey or siliceous soils, in a subhumid bioclimate rarely semi-arid, at all altitudes of the province, from 500 to 1400 m. This variety of species highlights the taxonomic richness and confirms the interest of prospecting this region that was neglected by orchidologists.La connaissance des orchidĂ©es de lâAlgĂ©rie a sĂ©rieusement progressĂ© ces derniĂšres annĂ©es, mais certaines rĂ©gions, comme celle de la wilaya de Souk-Ahras (nord-est de lâAlgĂ©rie), demeurent sous-prospectĂ©es. Cette Ă©tude est une approche phytoĂ©cologique qui a pour objectif dâamĂ©liorer la connaissance des orchidĂ©es de cette wilaya. Une sĂ©rie de prospections rĂ©alisĂ©e par les auteurs entre 2011 et 2015, sâest soldĂ©e par lâinventaire de 7 genres, comprenant 27 espĂšces/sous-espĂšces et 1 hybride. Certaines espĂšces prĂ©sentent une large distribution Ă travers le territoire de la wilaya, alors que dâautres sont trĂšs localisĂ©es. Seules 18 communes sur les 26 de la wilaya sont concernĂ©es par cette distribution et reprĂ©sentĂ©es par 73 stations incluant au moins une espĂšce dâorchidĂ©es. Parmi les taxons observĂ©s, sept sont qualifiĂ©s de rares ou trĂšs rares Ă lâĂ©chelle du pays, au moins trois sont des endĂ©miques algĂ©ro-tunisiens (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) et au moins trois sont menacĂ©s Ă lâĂ©chelle globale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). Les orchidacĂ©es de la wilaya de Souk-Ahras croissent souvent sur des sols calcaires, argileux ou siliceux, dans un bioclimat subhumide ou rarement semi-aride, Ă toutes les altitudes de la wilaya (500 Ă 1400 m). Cette variĂ©tĂ© dâespĂšces met en Ă©vidence la richesse taxinomique et confirme lâintĂ©rĂȘt de prospecter cette rĂ©gion nĂ©gligĂ©e par les orchidologues