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Rozmieszczenie populacji cisa pospolitego (Taxus baccata L.) w rezerwacie "Cisy nad Liswartą"

100%

Hylla W., Dobrowolska D.

Sylwan

|

2015

|

tom 159

|

nr 11

The study analyses the spatial distribution of European yew and its co−occurrence with other trees or different individuals of the species. The study was conducted in the ‘Cisy nad Liswartą' nature reserve (50°46'27.12"N, 18°47'11.86"E). Data was collected in the whole reserve as well as on three 40×40 m study plots. The selected plots varied in terms of yew density, stand species composition and soil humidity. Study plots were divided into 16 squares (10×10 m). Ripley's K functions were used to examine spatial patterns of yew and other tree species populations. The distribution of all trees was random in the reserve. However, distribution of yew population was clumped. Yew preferred sites close to the creeks. Significant clustering of yew trees at distances up to 60−180 m was found. Distribution of yew on plot II was random, while clumped on plots I and III. The co−occurrence of yew and other tree species was random on plot I. Nevertheless, the positive correlation was found for yew and other tree species at the scale of 13−19 m and negative correlation at the distance 0−4 m. Co−occurrence of yew and other tree species was random on plot III as well. Negative correlation was found for thin yew and spruce at the distance of 8 m on plot I. Positive correlations were noticed for yew and other tree species, yew and sycamore at the distance 16 m on plot II. Negative correlations at the distance 18 m were achieved on plot III for: yew and alder, large yew and alder, yew and other tree species of diameter 15−35 cm. Yew grows on higher places, on small islands. The competition between spruce and yew (negative correlation) was the consequence of light and humidity demand of both tree species. The negative correlation between yews and medium alders on longer distance was the result of light competition.

2

Entomofauna zasiedlajaca cisa Taxus baccata L. w wybranych rezerwatach cisowych w Polsce

67%

Labedzki A.

Parki Narodowe i Rezerwaty Przyrody. Suplement

|

1995

|

tom 13

|

nr 1

83-90

3

Struktura populacji i kondycja zdrowotna cisa pospolitego w rezerwacie "Cisy nad Liswartą"

67%

Hylla W., Dobrowolska D.

Sylwan

|

2015

|

tom 159

|

nr 01

The aim of the study was to recognise the structure (sex, height, diameter) and vitality of European yew (Taxus baccata L.) population in the ‘Cisy nad Liswartą' reserve (50°4627,12N 18°4711,86E). The field investigations were performed in years 2005−2009. We measured diameter at breast height, diameter at root collar and height of all yews in the reserve. Sex of the individuals was determined as well as their health condition was classified into one of five classes. Total number of life and dead yew specimens (with height over 0,5 m) accounted to 466. Majority of the population grew in dense stands (stand density index 0.5−0.7). Sex was described for 55% of the population. Number of female individuals was 142 (30%) and male 116 (25%). Lack of or small crown transparency was found for 30% of life yew trees. The share of high transparency crowns equalled 11%. Damage caused by the game (especially deer) was older than 10 years and found for 42% life trees. Seedlings occurred under the canopy of 47 mature trees (10% of population). 15 relevés were established in the investigated stands. Natural regeneration of yew was found on 11 of them. 5 characterised with small number of yew seedlings. The greatest number of seedlings equalled 200 individuals. It was found that the number of yews higher than 0.5 m decreased in comparison to the previous surveys. Female and male yew trees occurred in the reserve, so the generative breeding is possible. Health condition of the analysed yew population is moderate. Problems with survival of the seedlings was observed. The special treatments should be recommended – cutting of some competitors to give more light for natural regeneration and fencing the greater number of yew seedlings.

Ograniczanie wyników

2 Sylwan

1 Parki Narodowe i Rezerwaty Przyrody. Suplement

2 Dobrowolska D.

2 Hylla W.

1 Labedzki A.

2 2015

1 1995

Rozmieszczenie populacji cisa pospolitego (Taxus baccata L.) w rezerwacie "Cisy nad Liswartą"

Entomofauna zasiedlajaca cisa Taxus baccata L. w wybranych rezerwatach cisowych w Polsce

Struktura populacji i kondycja zdrowotna cisa pospolitego w rezerwacie "Cisy nad Liswartą"