Age structure and growth of Dracaena cinnabari populations on Socotra

  title={Age structure and growth of Dracaena cinnabari populations on Socotra},
  author={Radim Adolt and Jindřich Pavli{\vs}},
Unique Dracaena cinnabari woodlands on Socotra Island—relics of the Mio-Pliocene xerophile-sclerophyllous southern Tethys Flora—were examined in detail, especially with regard to their age structure. Detailed statistical analyses of sets of 50 trees at four localities were performed in order to define a model reflecting relationships between specific growth habit and actual age. The problematic nature of determining the age of an individual tree or specific populations of D. cinnabari is… 

Crown age estimation of a monocotyledonous tree species Dracaena cinnabari using logistic regression

Unique woodlands of Dracaena cinnabari (DC) are at risk throughout most of their range (Socotra Island, Yemen) as a result of missing regeneration and overmaturity. Effective conservation measures

Long-term in situ sap flow monitoring in a mature Dracaena cinnabari tree on Socotra

The ability to replenish succulent woody organs from atmospheric water and to survive long periods of drought from the internal supply distinguishes the behavior of this short-rooted arborescent monocot from the known strategies of deep-roOTS trees in arid areas.

Growth dynamics of Dracaena cinnabari under controlled conditions as the most effective way to protect endangered species

Field Survey of Dracaena Cinnabari Populations in Firmihin, Socotra Island: Methodology and Preliminary Results

The design and concept of the survey makes it possible to evaluate changes over time on stem by stem bases and to generalize these stem-level details to the whole population, which would be extremely useful to draw firm conclusions about the dynamic of the whole DC population in Firmihin.

Age estimation of juvenile stages of Dracaena cinnabari Balf. F., the last stone in the mosaic of knowing its lifespan

A non-destructive methodology for juvenile Socotra dragon’s blood trees (Dracaena cinnabari Balf. F., DBT) age estimation was developed, although the calculated absolute values are not precise.

Growth Dynamics of Endemic Dracaena cinnabari Seedlings In Situ on Socotra Island

It was found that continuous goat exclusion was necessary to prevent seedling mortality, and a new classification of the growth stages was developed, which will enable better tracking of population dynamics.

Rhythmic growth and age estimation of aerial roots in Dracaena draco (Asparagaceae)

This study is the first report of visual markers of seasonal growth in evergreen D. draco, and enables to estimate when stress-induced AR formation occurred and thus, help to identity the cause of stress.

First Age-Estimation Model for Dracaena ombet and Dracaena draco subsp. caboverdeana

The first model for crown age estimation was developed for Dracaena ombet Heuglin ex Kotschy and Peyr and for D. draco subsp.

Development of a population of Boswellia elongata Balf. F. in Homhil nature sanctuary, Socotra island (Yemen)

The study reveals that the Homhil Nature Sanctuary B. elongata population shows a continuous decline since 1956 and is, therefore, unbalanced with large sized trees prevailing and natural regeneration is absent for decades.

Distribution and population characteristics of the Cucumber Tree (Dendrosicyos socotranus Balf.f.)

This study conducted a study throughout Socotra Island to investigate the distribution, population structure and regeneration potential of the endemic and threatened tree species Dendrosicyos socotranus, the Cucumber Tree, finding that 16% of the individual trees regenerated.



A new species of the wild dragon tree, Dracaena (Dracaenaceae) from Gran Canaria and its taxonomic and biogeographic implications

The dragon tree group is postulate that this group has a Tethyan origin, a hypothesis supported by fossil and palaeoclimatic data, and thus parallels the distribution and dispersal pattern of other taxonomic groups.

Das Alter der Drachenhäume auf Tenerife

Dracaena in West Africa

This taxonomic revision of the genus Dracaena L. (Liliaceae) in West Africa is another contribution towards a monograph on this group, with historical, phytogeographical, morphological and phylogenetic observations.

The vegetation of Socotra.

The vegetation of the semi-arid zone is confined to the highlands of the Hagghier, above the height of 850 m.

The geology of Socotra Island, Gulf of Aden

Basement rocks crop out in three main uplift areas; elsewhere they are overlain by a veneer of Cretaceous and Tertiary plateau limestones. The oldest basement rocks are amphibolite facies

Tropical Trees and Forests: An Architectural Analysis

This book discusses the construction and study of Architectural Tree Models of Tropical Trees, and the role of ornamentation in the development of these models.

Potential carcinogenicity of homoisoflavanoids and flavonoids from Resina sanguinis draconis (Dracaena cinnabari Balf.).

Polarographic behavior of three homoisoflavanoids and four flavanoids isolated from the dragon's blood and an index of potential carcinogenicity tg alpha indicated that the majority of these compounds possesses no or only marginal potential carcinogenic activity.

Flora of the Arabian Peninsula and Socotra

Preface Acknowledgements Abbreviations Bibliography List of Tribes and Genera in Volume 5 Part 1 List of Figures Plan of Flora Poaceae (Gramineae) Maps Index to Names.

Plants of Dhofar, The Southern Region of Oman: Traditional, Economic, and Medicinal Uses

Getting the books plants of dhofar the southern region of oman traditional now is not type of inspiring means. You could not without help going similar to ebook collection or library or borrowing