Climbing plants of the Haut-Sassandra forest: species and biomorphology.

Etien, D.; Traoré, D.; Bongers, F.; Parren, Marc

doi:10.1079/9780851999142.0137

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“…In general, climbing plants are most abundant in the tropics and decline poleward in different continents. The average CPF in Chinese tropics recorded in this study (18.4%) is close to the lower limits of 17–30% reported for tropical Africa (Hall & Swaine, 1976; Etien & Traoré, 2005; Jongkind & Hawthorne, 2005; Kokou & Caballé, 2005; Natta & Sinsin, 2005; Swaine et al. , 2005) and 19–26.7% for tropical America (Gentry & Dodson, 1987a; Solórzano et al.…”

Section: Discussionsupporting

confidence: 88%

Geographical and environmental gradients of lianas and vines in China

Liang

2010

Global Ecology and Biogeography

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Aim Climbing plants are characterized by long, wide vessel elements, which may be vulnerable to cold-or drought-induced embolism. However, the difference in vulnerability between lianas (woody climbing plants) and vines (herbaceous climbing plants) has not yet been reported. Here we hypothesize that both lianas and vines are more sensitive to variations in water and temperature than are self-supporting plants.Consequently, the proportions of lianas and vines in flora are expected to decline significantly along geographical and environmental gradients. Location China.Methods A unique dataset describing 82 floras in China was examined. The proportion of lianas in the flora (LPF) and the proportion of vines in the flora (VPF) were calculated independently. The proportion of the climbing plants in total spermatophyte flora (CPF) was also calculated. LPF and VPF were compared along latitudinal, mean annual rainfall (Rain), and mean January temperature (T1) gradients. Local linear regression analyses showed the changing tendencies of LPF and VPF. Prediction models of LPF using geographical and environmental factors were studied in some subranges. Results(1) LPF was highest in the tropics (13.8% on average), decreased linearly with increasing latitude within the latitude < 42°N subrange, and reached < 1% north of 42°N in China. VPF fluctuated slightly from tropical (4.7%), to subtropical (4.2%) to warm temperate (4.5%) regions, but declined significantly in temperate (3.2%) and dry (1.5%) zones in China. (2) LPF decreased significantly with decreasing rainfall, and decreased significantly with decreasing T1 in areas where T1 > -10°C. In contrast, VPF tended to be constant in areas where T1 > -5°C or Rain > 1000 mm, and declined under extreme water or temperature stresses. (3) Predictions of LPF using Rain and T1 in areas where T1 > -10°C, and using latitude and altitude within the latitude < 42°N subrange were both reliable. According to the geographical model for LPF and a constant VPF, tropical Asian forests would have a LPF as high as 25.4% and the highest CPF would be c. 30%. ConclusionsWe conclude that liana diversity is more sensitive to temperature and water availability than that of vines and other plants. Geographical and environmental gradients affected LPF but not VPF. Shorter life spans and underground nutrient storage may be effective strategies adopted by vines to avoid drought and cold stresses.

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Section: Discussionsupporting

confidence: 88%

Geographical and environmental gradients of lianas and vines in China

Liang

2010

Global Ecology and Biogeography

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“…L'exploitation abusive de la FCHS a entraîné de nombreuses conséquences (édaphiques, floristiques, cynégétiques, etc.). En effet, les échancrures laissées dans la voûte forestière par l'abattage des arbres, les chablis ou les éclaircies, de même que les débusquages ou les débardages, ont favorisé des microcosmes propices à l'installation et à la prolifération d'une flore herbacée et lianescente (Coudurier, 1992;Etien et Traoré, 2005 Koffi et al, 2016). Pour Caballé (1984), l'apparition de lianes dans un milieu donné, est le réactif le plus sensible à l'hétérogénéité d'un couvert forestier.…”

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Diversité Des Espèces Herbacées Et Lianescentes De La Forêt Classée Du Haut-Sassandra (Centre-Ouest, Côte d’Ivoire) Après Plusieurs Années D’exploitation Forestière

Théodore

Aimé

Yves

et al. 2018

ESJ

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Natural and anthropogenic disturbances affect forest integrity and floristic composition. The resulting secondary habitats is characterised by liana and herb species which modified the forest physiognomy. To elucidate the floristic characteristics of these secondary forests, the present study was carried out after logging operations in the the Haut-Sassandra protected Forest. The inventory has been realised in 18 individual one ha in three level of logging operation. A total of 445 species have been identified. Floristics parameters vary according to the time after logging operation: from 255 in the south sector, 296 species in the center sector, 271 species in the north sector, 15 years after logging. The family diversity is between 56 and 62 with a predominance of Rubiaceae. Phytogeographic-types are characterized by Guinean-Congolese species (71,2 %), and species endemic to SavannahForest transition zone (14,6 %). The presence of herb and liana species which are pioneer and heliophile, could generate a micro climate favorable to the recovery of other forest plant species.Keywords: Forest resilience, forest logging, ecological temperament, floristic gradient, Côte d'Ivoire RésuméDes perturbations tant naturelles qu'anthropiques, affectent l'intégrité des forêts et leur composition floristique. Il en résulte une flore secondaire généralement caractérisée par des herbes et des lianes qui donnent une European Scientific Journal June 2018 edition Vol.14, No.18 ISSN: 1857 -7881 (Print) e -ISSN 1857-7431 248 physionomie modifiée des habitats originaux. Pour caractériser la flore herbacée et lianescente de telles végétations secondaires, la présente étude a été réalisée dans la Forêt Classée du Haut-Sassandra après des activités d'exploitations forestières. L'inventaire a été réalisé dans 18 parcelles de un ha chacune et placées dans trois secteurs de niveau d'exploitation différente. Au total, 445 espèces y ont été recensées. Les résultats montrent une variation des paramètres floristiques en fonction du secteur d'exploitation: 255 espèces dans le secteur Sud, 296 espèces dans le secteur Centre, 271 espèces dans le secteur Nord, 15 ans après les exploitations. La diversité des familles est comprise entre 56 et 62 avec une prédominance des Rubiaceae. Les types phytogéographiques sont caractérisés par des espèces à distribution Guinéo-Congolaise (71,2 %) et des espèces de la zone de transition Savane-forêt (14,6 %). La présence de cette flore herbacée et lianescente, souvent pionnière et héliophile, génère un microclimat qui pourrait être favorable à la germination d'autres semences forestières.

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Climbing plants of the Haut-Sassandra forest: species and biomorphology.

Cited by 2 publications

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Geographical and environmental gradients of lianas and vines in China

Geographical and environmental gradients of lianas and vines in China

Diversité Des Espèces Herbacées Et Lianescentes De La Forêt Classée Du Haut-Sassandra (Centre-Ouest, Côte d’Ivoire) Après Plusieurs Années D’exploitation Forestière

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