Diversity of maritime juniper woodlands

Muñoz-Reinoso, José Carlos

doi:10.1016/j.foreco.2004.01.039

Cited by 19 publications

(4 citation statements)

References 9 publications

(9 reference statements)

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“…This is however, in contrast with the results of Munoz-Reinoso (2004), Pourbabaei and Roostami (2007), Roberts (2002), Yirdaw (2001), where species diversity had been found to be lower in the plantations. The highest undergrowth plant species diversity in the plantations is expected since species richness per sampling plot was also higher in the plantations.…”

Section: Resultscontrasting

confidence: 90%

Effects of Land-Use Change on Under Storey Species Composition and Distribution in a Tropical Rainforest

2012

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The forest land's conversion into tree crops plantations plays a major role in the loss of biodiversity. Therefore, understanding the impacts of land-use change on species diversity is very critical for ecosystem functioning and stability. This study was carried out to evaluate the effect of land-use changes on under storey species diversity in the Theobroma cacao and Citrus sinensis plantations. Two, 25 m × 25 m plots were sampled in each plantation and a nearby undisturbed secondary rainforest for comparison. The diameters (dbh-1.3 m) of all trees at breast height >10 cm were measured in each plot. Five line transect were systematically laid and a quadrat of 50 cm × 50 cm placed at every 1 m point to identify the under storey species (herbaceous, shrubs, tree saplings and climbers) present in each plot. Percentage canopy, species diversity using Shannon-Wiener, Simpson's index and Evenness were determined, while species similarity was determined using the Jaccard's similarity index. Results indicate that woody basal area and stem density in Theobroma cacao were significantly (P<0.05) higher than the Citrus sinensis plantation. A total number of 25, 27, and 14 under storey species distributed in 16, 19 and 11 families were found in Theobroma cacao, Citrus sinensis plantations and secondary forest respectively. Panicum maximum and Axonopus compressus were the dominant grasses in the Theobroma cacao and Citrus sinensis plantations respectively. The percentage canopy cover was significantly (P<0.05) higher in the secondary forest than the plantations. The land use modification has significantly increased the under storey species composition.

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Section: Resultscontrasting

confidence: 90%

Effects of Land-Use Change on Under Storey Species Composition and Distribution in a Tropical Rainforest

2012

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“…In some ecosystems, both within as well as outside its natural range, it is even considered an invasive species (Rejmánek and Richardson, 2003;Muñoz-Reinoso, 2004). Although clearly less competitive than other truly invasive plants (Grotkopp et al, 2002;Peperkorn et al, 2005), its lack of inbreeding depression (Ammannati, 1989) facilitates the natural colonization of new areas, on occasions by only one or just a few kin individuals, without any negative founder effects, e.g.…”

mentioning

confidence: 99%

Phenotypic plasticity is stronger than adaptative differentiation among Mediterranean stone pine provenances

Mutke

Gordo²,

Chambel³

et al. 2010

For. syst.

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The Mediterranean stone pine, Pinus pinea L., seems to be well adapted to the different climate zones of its distribution range that spans four thousand kilometres along the Northern shore of the Mediterranean Sea. But recent molecular studies revealed it to be extremely genetically depauperate for a widespread tree. In this context, a provenances trial should elucidate whether any differentiation in adaptative traits can be identified between 34 accessions covering its natural range. The presence of strong spatial autocorrelations throughout four test sites required iterative nearest-neighbours adjustments in their statistical analysis. No significant differences in survival or ontogeny were found between accessions, while height growth was slightly though significantly more vigorous in northern or inland provenances. But these differences were masked by a common, stable reaction norm in dependence on site and microsite. On the other hand, its strong developmental plasticity allows the stone pine to delay the heteroblastic phase change in order to survive in unfavourable conditions, a clear advantage in the limiting and unpredictable environments of Mediterranean ecosystems.

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“…This also holds true for some juniper woodlands, growing in semiarid regions (Gardner and Fisher 1996;Gauquelin et al 1999;Muñoz-Reinoso 2004;El-Bana et al 2010). When restricted to just a few areas, isolated plant populations are more susceptible to climate change, human pressure and to suffering from stochastic events that can threaten their resources and habitats.…”

Section: Introductionmentioning

confidence: 99%

Diversity and distribution of the last remnants of endemic juniper woodlands on Tenerife, Canary Islands

et al. 2012

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Identifying ecological requirements, species diversity patterns and distribution ranges of habitats of interest is an important task when developing conservation and restoration programs. The Canarian juniper woodland formed by Juniperus turbinata ssp. canariensis is listed as a priority habitat by the European Union. Although very common in the past, this vegetation type has suffered immense destruction and degradation over the last five centuries on the Canary Islands, especially on the largest most populated island of Tenerife. We evaluated the geographical distribution range of the last remnants of Canarian juniper woodlands on Tenerife and analyzed their ecological status, floristic composition and plant species diversity. Despite the degradation of the original vegetation, we still observed outstanding species diversity. Endemic species richness and number of typical habitat species were best predicted by summer rainfall, which seems to be the limiting factor for this habitat in the lower drier regions. Human disturbance has had a negative effect on endemic species richness but a positive effect on the distribution of alien plants, highlighting the potential threat to this habitat. Ecological characterization and floristic composition were most influenced by climatic factors related to the dichotomy of a humid windward and a drier leeward slope of the island and by altitude. However, vegetation structure and human disturbance also determined species composition. Environmental requirements indicated a circuminsular potential distribution of this habitat. Given the exceptional plant diversity, the scarcity of dense stands and the low protection status, immediate protection of the remaining stands and future restoration programs should be the priority for conservation strategies of this endemic vegetation type.

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Diversity of maritime juniper woodlands

Cited by 19 publications

References 9 publications

Effects of Land-Use Change on Under Storey Species Composition and Distribution in a Tropical Rainforest

Effects of Land-Use Change on Under Storey Species Composition and Distribution in a Tropical Rainforest

Phenotypic plasticity is stronger than adaptative differentiation among Mediterranean stone pine provenances

Diversity and distribution of the last remnants of endemic juniper woodlands on Tenerife, Canary Islands

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