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Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran

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Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran. / Ahmadi, Kourosh; Jalil Alavi, Seyed; Zahedi Amiri, Ghavamudin; Mohsen Hosseini, Seyed; Serra-Diaz, Josep M.; Svenning, Jens Christian.

I: Nordic Journal of Botany, Bind 38, Nr. 3, e02598, 03.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Ahmadi, K, Jalil Alavi, S, Zahedi Amiri, G, Mohsen Hosseini, S, Serra-Diaz, JM & Svenning, JC 2020, 'Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran', Nordic Journal of Botany, bind 38, nr. 3, e02598. https://doi.org/10.1111/njb.02598

APA

Ahmadi, K., Jalil Alavi, S., Zahedi Amiri, G., Mohsen Hosseini, S., Serra-Diaz, J. M., & Svenning, J. C. (2020). Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran. Nordic Journal of Botany, 38(3), [e02598]. https://doi.org/10.1111/njb.02598

CBE

Ahmadi K, Jalil Alavi S, Zahedi Amiri G, Mohsen Hosseini S, Serra-Diaz JM, Svenning JC. 2020. Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran. Nordic Journal of Botany. 38(3):Article e02598. https://doi.org/10.1111/njb.02598

MLA

Vancouver

Ahmadi K, Jalil Alavi S, Zahedi Amiri G, Mohsen Hosseini S, Serra-Diaz JM, Svenning JC. Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran. Nordic Journal of Botany. 2020 mar;38(3). e02598. https://doi.org/10.1111/njb.02598

Author

Ahmadi, Kourosh ; Jalil Alavi, Seyed ; Zahedi Amiri, Ghavamudin ; Mohsen Hosseini, Seyed ; Serra-Diaz, Josep M. ; Svenning, Jens Christian. / Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran. I: Nordic Journal of Botany. 2020 ; Bind 38, Nr. 3.

Bibtex

@article{c3c1a0e8ad214b6fa49d4a9f065cf2b2,
title = "Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran",
abstract = "Iran's Hyrcanian forests cover a relatively narrow strip in the northeastern part of the country, and are among the most important and valuable ecosystems inscribed in United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage List. European yew Taxus baccata L. is a Tertiary relict in the region and a long-lived dioecious tree with high ecological and economic importance in the Hyrcanian forests. To study the structure and analysing the survivorship of yew stands, we selected two forest reserves (Gazou and Afratakhteh) with European yew. In the two study areas, we established 165 0.1 ha circular sample plots (75 of the sample plots were in Gazou and 90 sample plots were in Afratakhteh) and measured three characteristics of each tree. The structure of the stands was quantified by means of 1) size distributions by diameter at breast height (DBH), 2) height classes, 3) and stand basal area. Comparison of the diameter distribution by DBH classes in two the forest reserves showed that there was no statistical difference between the two populations. The highest number of yew trees in the Afratakhteh and Gazou populations were in the 12–16 and 18–24 m height classes, respectively. In Gazou, abundance was greatest at 1000 m a.s.l. on mesic exposures and intermediate slopes (40–50%), whereas in Afratakhteh it was found at 1600–1620 m a.s.l. on east-facing areas with 55–65% slopes. Static life tables indicated that the first two age classes have particularily high mortality. Based on these results, we conclude that forest managers should support the regeneration of stands and increase survival rates by applying treatments such as thinning and selective removal of shrubs and saplings of other tree species.",
keywords = "active protection approach, basal area, forest structure, Hyrcanian forests, yew species",
author = "Kourosh Ahmadi and {Jalil Alavi}, Seyed and {Zahedi Amiri}, Ghavamudin and {Mohsen Hosseini}, Seyed and Serra-Diaz, {Josep M.} and Svenning, {Jens Christian}",
year = "2020",
month = mar,
doi = "10.1111/njb.02598",
language = "English",
volume = "38",
journal = "Opera Botanica",
issn = "0078-5237",
publisher = "Council for Nordic Publication in Botany",
number = "3",

}

RIS

TY - JOUR

T1 - Patterns of density and structure of natural populations of Taxus baccata in the Hyrcanian forests of Iran

AU - Ahmadi, Kourosh

AU - Jalil Alavi, Seyed

AU - Zahedi Amiri, Ghavamudin

AU - Mohsen Hosseini, Seyed

AU - Serra-Diaz, Josep M.

AU - Svenning, Jens Christian

PY - 2020/3

Y1 - 2020/3

N2 - Iran's Hyrcanian forests cover a relatively narrow strip in the northeastern part of the country, and are among the most important and valuable ecosystems inscribed in United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage List. European yew Taxus baccata L. is a Tertiary relict in the region and a long-lived dioecious tree with high ecological and economic importance in the Hyrcanian forests. To study the structure and analysing the survivorship of yew stands, we selected two forest reserves (Gazou and Afratakhteh) with European yew. In the two study areas, we established 165 0.1 ha circular sample plots (75 of the sample plots were in Gazou and 90 sample plots were in Afratakhteh) and measured three characteristics of each tree. The structure of the stands was quantified by means of 1) size distributions by diameter at breast height (DBH), 2) height classes, 3) and stand basal area. Comparison of the diameter distribution by DBH classes in two the forest reserves showed that there was no statistical difference between the two populations. The highest number of yew trees in the Afratakhteh and Gazou populations were in the 12–16 and 18–24 m height classes, respectively. In Gazou, abundance was greatest at 1000 m a.s.l. on mesic exposures and intermediate slopes (40–50%), whereas in Afratakhteh it was found at 1600–1620 m a.s.l. on east-facing areas with 55–65% slopes. Static life tables indicated that the first two age classes have particularily high mortality. Based on these results, we conclude that forest managers should support the regeneration of stands and increase survival rates by applying treatments such as thinning and selective removal of shrubs and saplings of other tree species.

AB - Iran's Hyrcanian forests cover a relatively narrow strip in the northeastern part of the country, and are among the most important and valuable ecosystems inscribed in United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage List. European yew Taxus baccata L. is a Tertiary relict in the region and a long-lived dioecious tree with high ecological and economic importance in the Hyrcanian forests. To study the structure and analysing the survivorship of yew stands, we selected two forest reserves (Gazou and Afratakhteh) with European yew. In the two study areas, we established 165 0.1 ha circular sample plots (75 of the sample plots were in Gazou and 90 sample plots were in Afratakhteh) and measured three characteristics of each tree. The structure of the stands was quantified by means of 1) size distributions by diameter at breast height (DBH), 2) height classes, 3) and stand basal area. Comparison of the diameter distribution by DBH classes in two the forest reserves showed that there was no statistical difference between the two populations. The highest number of yew trees in the Afratakhteh and Gazou populations were in the 12–16 and 18–24 m height classes, respectively. In Gazou, abundance was greatest at 1000 m a.s.l. on mesic exposures and intermediate slopes (40–50%), whereas in Afratakhteh it was found at 1600–1620 m a.s.l. on east-facing areas with 55–65% slopes. Static life tables indicated that the first two age classes have particularily high mortality. Based on these results, we conclude that forest managers should support the regeneration of stands and increase survival rates by applying treatments such as thinning and selective removal of shrubs and saplings of other tree species.

KW - active protection approach

KW - basal area

KW - forest structure

KW - Hyrcanian forests

KW - yew species

UR - http://www.scopus.com/inward/record.url?scp=85083043841&partnerID=8YFLogxK

U2 - 10.1111/njb.02598

DO - 10.1111/njb.02598

M3 - Journal article

AN - SCOPUS:85083043841

VL - 38

JO - Opera Botanica

JF - Opera Botanica

SN - 0078-5237

IS - 3

M1 - e02598

ER -