Weak competitive ability may explain decline of Taxus baccata

Iszkuło, Grzegorz; Didukh, Yakiv; Giertych, M.; Jasiñska, Anna K.; Sobierajska, Karolina; Szmyt, Janusz

doi:10.1007/s13595-012-0193-4

Cited by 27 publications

(23 citation statements)

References 31 publications

(35 reference statements)

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“…Linares, 2013;Ruprecht et al, 2010). Populations passively protected in the central and northern range of its distribution are declining without human intervention (Dhar et al, 2008;Iszkuło et al, 2012;Ruprecht et al, 2010). However, the establishment of a new yew populations, of which arising is strictly related with the habitats significantly altered by human activity, has been recently reported.…”

Section: Introductionmentioning

confidence: 99%

Postglacial migration dynamics helps to explain current scattered distribution of Taxus baccata

Iszkuło¹,

Pers‐Kamczyc²,

Nalepka³

et al. 2016

Dendrobiology

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Taxus baccata L. has a scattered distribution and the decline of yew woodlands is observed across the entire species range. Passively protected populations in the central and northern part of their distribution are declining without human intervention. However, the establishment of new yew populations is observed in habitats that have been significantly transformed by humans. The following question need to be answered: why do yews find better in environmental conditions that have been strongly modified by humans compared to natural systems? The Quaternary history might be the key to understand the current yew situation. As suggested by palaeobotanical studies, pollen of T. baccata was observed at optima of the interglacials, but in subsequent periods, it has been displaced by that of other shade-tolerant species. Pollen diagrams indicate that after the last glaciation, the yew did not appear earlier than other shade-tolerant species and did not have the opportunity to become common in occurrence, as in previous interglacial periods. As a result, yews occur only as relict populations within environmental islands where the competition with other shade-tolerant species is low. The negative human impact on yew is well-documented, but limitations resulting from the biology of this species are also very important. T. baccata is a species whose current scattered distribution may explain the Quaternary history. Yew situation is better in artificial conditions because people reduce competition from other trees species and deer pressure. Possible positive impact of human on yew distribution in the past is also discussed. The current biological condition of this species suggests the need for active protection.

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Section: Introductionmentioning

confidence: 99%

Postglacial migration dynamics helps to explain current scattered distribution of Taxus baccata

Iszkuło¹,

Pers‐Kamczyc²,

Nalepka³

et al. 2016

Dendrobiology

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“…For protected forests (nature reserves, national parks, etc. ), knowledge about their structure can provide important information for undertaking conservation work to maintain or improve the living conditions of the protected objects, such as, plant associations and threatened species (Petritan et al 2012;Iszkuło et al 2013). …”

Section: Discussionmentioning

confidence: 99%

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Szmyt

2017

Forest Research Papers

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Abstract. The oak forests growing on the Krotoszyn Plateau are the biggest and most valuable oak forest complexes in Poland. The purpose of this study was to analyze the structural diversity of oak (Q. robur l.) stands older than 140 years. two natural stands located within the forest reserve as well as two managed stands were chosen for investigation. Species and tree size diversity were analyzed using different measures and spatially explicit and inexplicit indices. The results indicate that the structural diversity of the protected oak forests did not differ significantly from that of managed stands. On the contrary, undisturbed natural processes in protected forests can result in a low diversity of some structural attributes in such stands. Although most indices pointed towards a higher structural diversity in protected forests, the differences were not large, especially in the case of spatially explicit indices. The spatial arrangement of live trees was either random, aggregated or regular, with the latter clearly dominating managed, poorly mixed oak stands. Furthermore, a lack of natural disturbances strong hornbeam expansion, in which case strict protection is not favorable for oak sustainability as it creates unsuitable conditions for oak regeneration beneath the hornbeam canopy.

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“…Abies alba (Iszkulo et al, 2012). However, Thomas (2010) considered that yew maintains a high photosynthetic level under different light conditions, and Perrin & Mitchell (2013) did not find higher mortality under low light levels than under high light levels.…”

Section: Discussionmentioning

confidence: 99%

Restoration of European yew (Taxus baccata L.) in Mediterranean mountains: importance of seedling nursery fertilization and post-planting light levels

2015

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Aim of the study: We studied the influence of nursery fertilization and post-planting light environment on the growth and survival of out-planted two-year-old yew (Taxus baccata) seedlings.Area of study: Post-planting performance was assessed at two sites in the Valsain Forest (Central Mountain Range, Segovia, Spain).Materials and Methods: Seedlings were grown using the same seed-lot, container type and fertirrigation schedule. A soluble fertilizer with two contrasting doses resulting in 239 and 376 mg N per seedling was applied during the whole culture period. Seedlings grown under the highest level of fertilization had greater root collar diameter, height, shoot to root ratio, root and shoot mass, and root growth potential before planting. Post-planting performance was assessed at two sites in the Valsain Forest (Central Mountain Range, Segovia, Spain). In each site, seedlings from both fertilization treatments were planted in three plots with contrasting light environment (full sunlight, and under Pinus sylvestris stands with moderate and deep shade conditions). Survival, diameter and height growth were monitored for six years.Main results: Nursery fertilization did not affect survival, but high fertilization enhanced post-planting growth. Survival was highest under deep shade conditions but growth in this microsite was lower than in higher light sites, revealing a trade-off for survival and growth across light levels.Research highlights: The lower fertilization rate used in this study was suitable to produce seedlings with acceptable quality. Planting under shaded conditions (light availability<30%) is recommended to maximize the initial success of yew plantations in Mediterranean mountains.

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Weak competitive ability may explain decline of Taxus baccata

Cited by 27 publications

References 31 publications

Postglacial migration dynamics helps to explain current scattered distribution of Taxus baccata

Postglacial migration dynamics helps to explain current scattered distribution of Taxus baccata

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Restoration of European yew (Taxus baccata L.) in Mediterranean mountains: importance of seedling nursery fertilization and post-planting light levels

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