Microenvironmental Studies in the Laurel Forest of the Canary Islands

Höllermann, Peter

doi:10.2307/3673057

Cited by 27 publications

(22 citation statements)

References 13 publications

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“…A relevant feature of the volcanic Canaries is the variability of their maximal elevation, ranging from 670 m in Lanzarote to 3717 m in Tenerife. This elevation gradient determines a permanent cloud belt in the otherwise semi-arid climate of the Canary Islands (Höllermann, 1981;Marzol, 2002). The cloud belt determines the existence of humid Tertiary relict forests that exhibit exceptional species richness, including bryophytes, restricted to this ecosystem (González-Mancebo et al, 2009c).…”

Section: Introductionmentioning

confidence: 98%

Altitudinal distribution patterns of bryophytes in the Canary Islands and vulnerability to climate change

Lloret

González‐Mancebo

2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Introductionmentioning

confidence: 98%

Altitudinal distribution patterns of bryophytes in the Canary Islands and vulnerability to climate change

Lloret

González‐Mancebo

2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…In the laurel forest, forest destruction by roads and other structures causes progressive vegetation degradation, with the new open spaces being concealed by shrubs, bracken ferns and numerous introduced Mediterranean elements (Höllermann, 1981). Numerous exotic plants are increasingly colonizing forest road edges in the Canary Islands Arévalo et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Edge effects of roads on temperature, light, canopy cover, and canopy height in laurel and pine forests (Tenerife, Canary Islands)

Delgado

Arroyo

Arévalo

et al. 2007

Landscape and Urban Planning

161

120

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“…Because the high degree of light adaptation of leaves is usually associated with a higher stress tolerance [24], our results might seem contradictory. However, the light adaptation capacity of plants is genetically fixed and it should be borne in mind that the studied trees are adapted to very wet and shady habitats, where the laurel forest is distributed [16]. Nevertheless the leaves which develop in the upper canopy have to cope with strong light conditions on clear days [13,30], therefore only species such as those studied, that can modify their morphology and physiology to adapt to the changing conditions along the canopy, are able to grow in this dense forest [27].…”

Section: Discussionmentioning

confidence: 99%

“…Trees generally have broad leaves, always green and glossy, making up a dense canopy with different anatomical and physiological leaf characteristics [27]. These forests have the typical appearance of a cloud forest [16] and are mainly restricted to the most humid section of the northern (windward) slope in middle elevations where there is an almost permanent cloud belt. They are relicts of a now virtually extinct Tertiary Mediterranean flora that occupied southern Europe and North Africa about 20 million years ago [10,37] and disappeared during the Quaternary glaciations.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species

2005

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-The effect of freezing temperatures was studied in leaves of three tree species growing in the laurel forest of the Canary Islands, relictic vegetation of Tertiary Mediterranean flora. The decrease in photochemical capacity of PSII (Fv/Fm) was compared with visual assessment to determine the degree of frost damage 24 h after treatment. The study was carried out in sun and shade leaves, and in two different seasons, to obtain information about the intraspecific and seasonal variability of frost resistance of these three species. Our results showed that the studied species are sensitive to freezing temperatures, Laurus azorica being the most resistant species, undergoing damage at -10 ºC, while Persea indica and Myrica faya were damaged at -6 ºC and -4 ºC, respectively. In the warm season, sun leaves were less resistant to freezing temperatures than in the cold season and these leaves showed lower resistance than shade ones. The frost resistance shown by these species was lower than that of most Mediterranean woody species. However, the existence of other Mediterranean woody plants, with similar sensitivity to freezing temperatures, indicates that low temperatures were probably not the main cause in the past of their present confinement. chlorophyll fluorescence / Laurus azorica / Persea indica / Myrica faya / visual damage Résumé -Variation saisonnière et intraspécifique de la tolérance à la gelée des feuilles de trois espèces arborescentes de la forêt de laurier des îles Canaries. L'effet du gel a été étudié chez des feuilles de trois espèces d'arbres de la forêt de laurier des îles Canaries, végétation relique de la flore méditerranéenne du tertiaire. La diminution de la capacité photochimique de PSII (Fv/Fm) a été comparée à l'évaluation visuelle pour déterminer le degré de dommages de la gelée 24 h après le traitement. L'étude a été effectuée pour les feuilles de lumière et d'ombre, et à deux saisons différentes, pour obtenir des informations sur la variabilité intraspécifique et saisonnière de la résistance à la gelée de ces trois espèces. Nos résultats ont prouvé que les espèces étudiées sont sensibles au gel et Laurus azorica est l'espèce la plus résistante qui subira des dommages à -10 ºC, cependant Persea indica et Myrica faya ont été endommagées à -6 ºC et à -4 ºC, respectivement. Pendant la saison chaude, les feuilles de lumière étaient moins résistantes au gel que pendant la saison froide et ces feuilles ont montré des résistances inférieures à celles des feuilles d'ombre. La résistance à la gelée des ces espèces a été plus faible que celle des espèces ligneuses méditerranéennes. Cependant, l'existence d'autres plantes ligneuses méditerranéennes, avec une sensibilité semblable aux températures de gel, indique que les basses températures n'étaient probablement pas la cause principale dans le passé de leur confinement actuel. fluorescence de la chlorophylle / Laurus azorica / Persea indica / Myrica faya / dommages visuels

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Microenvironmental Studies in the Laurel Forest of the Canary Islands

Cited by 27 publications

References 13 publications

Altitudinal distribution patterns of bryophytes in the Canary Islands and vulnerability to climate change

Altitudinal distribution patterns of bryophytes in the Canary Islands and vulnerability to climate change

Edge effects of roads on temperature, light, canopy cover, and canopy height in laurel and pine forests (Tenerife, Canary Islands)

Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species

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