Will dragonblood survive the next period of climate change? Current and future potential distribution of Dracaena cinnabari (Socotra, Yemen)

Attorre, Fabio; Francesconi, Fabio; Taleb, Nadim; Scholte, Paul; Saed, Ahmed; Alfó, Marco; Bruno, F.

doi:10.1016/j.biocon.2007.05.009

Cited by 78 publications

(110 citation statements)

References 35 publications

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“…IVs were used as dependent variables, while climatic, topographical and geological data, in GRID format with a spatial resolution of 100 m, were used as independent variables. Climatic maps were obtained by interpolating precipitation and temperature data recorded in 10 manual meteorological stations and calculating the average data for the 2000-2008 period (Attorre et al 2007b). Besides mean annual temperature and annual precipitation, a moisture index (Mi) was used.…”

Section: Abundance and Spatial Distributionmentioning

confidence: 99%

Developing conservation strategies for endemic tree species when faced with time and data constraints: Boswellia spp. on Socotra (Yemen)

et al. 2011

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Many endemic tree species have important scientific, ecological and economic value but the scarcity of information about their biological and ecological features makes it difficult to develop conservation strategies for them. A four-step approach is presented to address this problem, based on the analysis of data collected in a limited-duration field study: (1) Data collected are used to analyse the ecological niche, population structure and regeneration status of the species in question. (2) Several IUCN Red List (RL) parameters, useful for assessing the species' risk of extinction, are measured, including population counts, number of locations, extent and area of occurrence. (3) The IUCN RL parameters are used together with the other information gathered to set preliminary conservation priorities. (4) The analysis of utilization pattern is used to develop conservation actions specific to the environmental and socio-economic context. To test the applicability of this approach Boswellia spp. of Socotra island were analysed. Ground-rooted species (B. ameero, B. elongata and B. socotrana) were the most abundant and widespread and, according to the spatial analysis, were characterised by a geo-altitudinal zonation. However, the Weibull functions fitted on their stem diameters, and the absence or presence of only a small number of saplings highlighted a poor regeneration status. In the absence of conservation actions, these species will probably be subject to a progressive decline because of uncontrolled grazing. Of the four cliff-rooted species, which grow in sites that are less accessible to livestock, two (B. popoviana and B. dioscorides) were of lower conservation priority and may become the most numerically abundant. Conversely, the other two (B. nana and B. bullata), which may be threatened by stochastic events because of their reduced populations and small number of locations, were considered of very high priority. Different conservation actions were then identified for each species. In particular, for Boswellia species producing gum, the conservation-through-use action was discussed as a potential option

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Section: Abundance and Spatial Distributionmentioning

confidence: 99%

Developing conservation strategies for endemic tree species when faced with time and data constraints: Boswellia spp. on Socotra (Yemen)

et al. 2011

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“…This potential habitat expected to reduce with 45% by 2080 because of a predicted increased aridity. Thereby, increasing permanent settlements and grazing pressure, should also be discouraged [63,64]. More insights are required on the formation mechanism of DB which enables its production in a sustainable way without destroying the endangered trees and environment [65].…”

Section: Future Prospectivesmentioning

confidence: 99%

Meta-analysis of dragon’s blood resin extract as radio-protective agent

Mahmood¹,

Fatima²,

Zulfaqar³

et al. 2017

JCLM

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“…The observations used for the analyses consisted in the presences observed, and also in pseudo-absences. Pseudo-absence data (Zaniewski et al 2002;Engler et al 2004) were generated with the same case-control method as in Attorre et al (2007b). Pseudo-absences were generated because the use of presence data only would have determined overoptimistic predictions of the potential distribution.…”

Section: Regression Models and Potential Distributionmentioning

confidence: 99%

A multiple approach for the evaluation of the spatial distribution and dynamics of a forest habitat: the case of Apennine beech forests with Taxus baccata and Ilex aquifolium

et al. 2009

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An approach integrating phytosociological and stand structure surveys with the predictive modelling of species distribution was applied to analyse the spatial distribution and dynamics of the Apennine beech forests with Taxus and Ilex, a high conservation priority forest habitat in Europe. The homogeneity of the habitat was tested trough a Mann-Whitney test between beech woods with Taxus and those with Ilex with respect to climatic, topographic, structural and environmental parameters: the former have proven to be more microthermic, mesophilous and characterised by a closer canopy. Five statistical models were compared to analyse the relationship between bioclimatic parameters and Taxus and Ilex spatial distribution: Regression Tree Analysis, the most efficient model, has shown that the distribution of Taxus is influenced by precipitation variables, while Ilex is mainly influenced by temperature variables. This model highlighted that Ilex has a potential area that surrounds, at lower altitudes, that of Taxus. A stepwise multiple regression analysis has been applied to identify the factors influencing the regeneration of the two species: beside climatic parameters, Taxus regeneration is negatively influenced by soil nitrate concentration (an indicator of livestock disturbance) while Ilex is negatively influenced by beech forest cover. Traditional management practices seem to have an effect on the regeneration of the two species: frequent cuts favour the regeneration of Ilex, reducing the forest cover and allowing more light penetration, while Taxus, less resistant to grazing livestock, is confined to more inaccessible places. The multiple approach has proven to be useful for the elaboration of two differentiated conservation strategies for the two beech forest types

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Will dragonblood survive the next period of climate change? Current and future potential distribution of Dracaena cinnabari (Socotra, Yemen)

Cited by 78 publications

References 35 publications

Developing conservation strategies for endemic tree species when faced with time and data constraints: Boswellia spp. on Socotra (Yemen)

Developing conservation strategies for endemic tree species when faced with time and data constraints: Boswellia spp. on Socotra (Yemen)

Meta-analysis of dragon’s blood resin extract as radio-protective agent

A multiple approach for the evaluation of the spatial distribution and dynamics of a forest habitat: the case of Apennine beech forests with Taxus baccata and Ilex aquifolium

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