POST-FIRE VEGETATION DYNAMICS IN A NATIVE PINUS HALEPENSIS MILL. FOREST ON MT. CARMEL, ISRAEL

Israel's largest naturalPinus halepensisMill. forest is on the Mt. Carmel range and belongs to the distinct East Mediterranean genetic group. Most of this forest is the result of invasion of abandoned fields and grazing lands, resulting in a heterogeneous pine forest with an understory of broad-leaf shrubs and trees. Species composition, vegetation cover, pine-stand structure, and pine genetic diversity of plots in sites of known fire history, burned 5, 11, and 20 years ago, were studied with adjacent unburned sites forming a chronosequence.Except for annual species, no species replacement took place during post-fire succession. The main observed changes were in the cover of species and of plant life forms. The ratio of tree/dwarf-shrub cover was found to be linearly related to the number of years elapsed since the last fire. Therefore, this ratio could serve as an index to determine the successional stage of Aleppo pine stands with unknown fire history. It is estimated that 30–40 years are needed for full recovery of Aleppo pine stands after fire, depending upon site quality. The stands of post-fire regeneration are of uniform age and are less variable in their structure than unburned stands. The genetic distance among the variousPinus halepensissubpopulations was found to be very small; most of the genetic variability was due to within-subpopulations variability, with almost no variability among subpopulations. Alleles that are typical of West MediterraneanP. halepensispopulations or ofP. brutia, were found in two post-fire subpopulations (stands), indicating pre-fire cross pollination between nativePinus halepensistrees and trees in adjacent pine plantations of foreign origin.The conclusion is that fire has little effect on species composition and on vegetation structure, but that it alters the Aleppo pine stand structure.

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Structural variability of Aleppo pine stands in two forests in northeastern Algeria

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d210663 ◽

2020 ◽

Vol 21 (6) ◽

Author(s):

Malika Rached Kanouni ◽

Insaf Hani ◽

Ratiba BOUSBA ◽

Amina Beldjazia ◽

Hichem KHAMAR

Keyword(s):

Pinus Halepensis ◽

Small Diameter ◽

Basal Area ◽

Aleppo Pine ◽

Regeneration Rate ◽

Tree Diameter ◽

Total Height ◽

Structural Variability ◽

Pine Stands ◽

Northeastern Algeria

Abstract. Rached-Kanouni M, Hani I, Bousba R, Beldjazia A, Khammar H. 2020. Structural variability of Aleppo pine stands in two forests in northeastern Algeria. Biodiversitas 21: 2848-2853. The layout of the stand can be described as the width of the trees, their reciprocal locations, diametric distinction and height. The goal of this study is to recognize changes in the Pinus halepensis spatial and demographic systems in two Beni Oudjana and Chettaba Forests, located in northeast Algeria. An inventory of trees in these forest formations with P. halepensis dominance was carried out based on dendrometric parameters such as total height, tree diameter at dbh ≥ 5 cm, basal area, total volume, etc., as well as the number of trees in the forest. Tree diameter and height measurements were made on 12 rectangular plots (20 m × 20 m), located in both forests. The results obtained show that the mean stand density, mean diameter, basal area and total volume are higher in Chettaba Forest, the values attributed to these parameters are respectively (422 trees/ha, 27.07 cm, 26, 86 m2, 251.63 m3); while the total height and regeneration rate show significantly higher values in Beni Oudjana Forest (18.97 m, 607 individuals/ha). The structure in diameter and height of the species is bell-shaped to asymmetrically positive with a predominance of small diameter individuals in the Chettaba forest. On the other hand, in the Beni Oudjana Forest, the structure is ‘L’ shaped, showing a predominance of very small diameter individuals. These results indicate that the low regeneration rate of P. halepensis in the Chettaba Forest is due to anthropogenic pressures that favor the degradation of this forest.

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Growth Reductions in Naturally Regenerated Southern Pine Stands in Alabama and Georgia

Southern Journal of Applied Forestry ◽

10.1093/sjaf/15.2.73 ◽

1991 ◽

Vol 15 (2) ◽

pp. 73-79 ◽

Cited By ~ 11

Author(s):

G. A. Ruark ◽

C. E. Thomas ◽

W. A. Bechtold ◽

D. M. May

Keyword(s):

Pinus Taeda ◽

Growth Rates ◽

Stand Structure ◽

Basal Area ◽

Stand Density ◽

Site Quality ◽

Usda Forest Service ◽

Forest Inventory And Analysis ◽

Pine Stands ◽

Growth Differences

Abstract Data from Forest Inventory and Analysis (FIA) units of the USDA Forest Service were used to compare average annual stand-level basal area accretion onto survivor pines in naturally regenerated pine stands throughout Alabama and Georgia. Growth rates measured between 1972-82 were compared to growth rates during the previous 10-year survey cycle in each state. Separate analyses were conducted for loblolly (Pinus taeda), longleaf (P. palustris), shortleaf (P. echinata), and slash (P. elliottii) pine cover types. The unadjusted average stand-level growth rates for survivor pines 1.0 in. diameter and greater at breast height were notably lower for all cover types during the latter survey in Georgia, while only the average unadjusted growth of shortleaf was substantially lower during this period in Alabama. However, when growth rates were adjusted with regression models to account for differences in initial stand structure (stand size class, stand density, site quality class, hardwood competition, and mortality) between the two survey periods, reductions in average adjusted basal area growth ranged from 3% to 31% during the later cycle in both states. The reductions were statistically significant in almost every case. The agents causing the growth differences were not identified, but it is unlikely that stand dynamics are responsible. The observational nature of the FIA dataset precludes further resolution of causal relationships. South. J. Appl. For. 15(2):73-79.

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Effects of uneven-aged silviculture on the stand structure, species composition, and economic returns of loblolly pine stands

Forest Ecology and Management ◽

10.1016/s0378-1127(98)00312-0 ◽

1998 ◽

Vol 111 (1) ◽

pp. 83-101 ◽

Cited By ~ 33

Author(s):

Benedict J. Schulte ◽

Joseph Buongiorno

Keyword(s):

Species Composition ◽

Loblolly Pine ◽

Stand Structure ◽

Economic Returns ◽

Pine Stands

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Vegetation Composition in a Post-Fire Successional Gradient of Pinus Halepensis Forests in Attica, Greece

International Journal of Wildland Fire ◽

10.1071/wf9960083 ◽

1996 ◽

Vol 6 (2) ◽

pp. 83 ◽

Cited By ~ 31

Author(s):

D Kazanis ◽

M Arianoutsou

Keyword(s):

Vegetation Structure ◽

Mediterranean Climate ◽

Pinus Halepensis ◽

Life Forms ◽

Aleppo Pine ◽

Pine Forests ◽

Vegetation Composition ◽

Climate Data ◽

Relative Contribution ◽

Second Year

The vegetation composition of a post-fire succession in Aleppo pine forests of Attica, Greece, was studied by a synchronic method. The sites form a post-fire chronosequence and have typical Mediterranean climate. Data on the flora of the burned sites, growth and life forms of the various plant taxa, as well as on vegetation structure are provided. The burned ecosystems recovered quite rapidly. During the first four years of the post-fire succession, herbaceous taxa dominate the flora of the forests, peaking at the second year. After 15 years little change in the vegetation was observed. The richest family in terms of the number of taxa was the Leguminosae, especially in the two first years of succession. Most of these taxa were herbaceous. The relative contribution of legumes to the flora after two years is gradually restricted.

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Site quality and stand structure in Pinus halepensis forests of north Greece

Forestry An International Journal of Forest Research ◽

10.1093/forestry/73.1.51 ◽

2000 ◽

Vol 73 (1) ◽

pp. 51-64 ◽

Cited By ~ 11

Author(s):

T. Tsitsoni

Keyword(s):

Stand Structure ◽

Pinus Halepensis ◽

Site Quality

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Carabidae of Barnaul city parks: ecological characteristics and species composition

Ukrainian Journal of Ecology ◽

10.15421/2018_353 ◽

2018 ◽

Vol 8 (2) ◽

pp. 348-353

Author(s):

E. A. Kuchina ◽

N. D. Ovcharenko ◽

L. D. Vasileva

Keyword(s):

Species Composition ◽

Diversity Index ◽

Similarity Index ◽

Life Forms ◽

Ground Beetles ◽

Forest Steppe ◽

Ecological Groups ◽

Dominant Group ◽

Species Diversity Index ◽

Steppe Species

<p>Anthropogenic impact on the population of ground beetles leads to a change in their numbers, structure of dominance, density, species composition, spectrum of life forms. This makes the beetles Carabidae a convenient and informative bioindicator of the ecological state of biocenoses. The material for this work was the Carabidae collections conducted in June-August 2016-2017 in the park zone of different regions of Barnaul, differing in location, area, hydrological regime, vegetation cover, purpose and anthropogenic load. When processing the material, the quantitative, species and generic composition of the carabidae was determined, calculations were made for such indicators as the Berger-Parker dominance index, the Shannon species diversity index (Hs), and the Jacquard species similarity index. The fauna (Coleoptera, Carabidae) of the park zone of Barnaul is represented by 55 species belonging to 20 genera. The dominant group is represented by species belonging to steppe, forest and polyzonal groups. Forest-steppe species of ground beetles as dominants have not been identified in any of the investigated territories. The greatest variety of ecological groups was noted on the territory of the Yubileyny рark, which is explained by the presence of zones with various microclimatic conditions, the presence of a birch grove that flows through the park with the Pivovarka River, and a wide log in the park. Registered species belong to eight groups of life forms belonging to two classes - zoophagous and myxophytophagous. On the numerical and species abundance, zoophages predominate. The spectrum of life forms corresponds to the zonal spectrum characteristic of the forest-steppe zone.</p><p> </p>

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Langfristige Entwicklung von zwei Waldgesellschaften im Białowieża-Urwald

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.2008.0080 ◽

2008 ◽

Vol 159 (4) ◽

pp. 80-90 ◽

Cited By ~ 3

Author(s):

Bogdan Brzeziecki ◽

Feliks Eugeniusz Bernadzki

Keyword(s):

Species Composition ◽

Tree Species ◽

Stand Structure ◽

Temporal Dynamics ◽

Structural Parameters ◽

Forest Communities ◽

Natural Forests ◽

Tree Species Composition ◽

Strong Trend ◽

Long Term Study

The results of a long-term study on the natural forest dynamics of two forest communities on one sample plot within the Białowieża National Park in Poland are presented. The two investigated forest communities consist of the Pino-Quercetum and the Tilio-Carpinetum type with the major tree species Pinus sylvestris, Picea abies, Betula sp., Quercus robur, Tilia cordata and Carpinus betulus. The results reveal strong temporal dynamics of both forest communities since 1936 in terms of tree species composition and of general stand structure. The four major tree species Scots pine, birch, English oak and Norway spruce, which were dominant until 1936, have gradually been replaced by lime and hornbeam. At the same time, the analysis of structural parameters indicates a strong trend towards a homogenization of the vertical stand structure. Possible causes for these dynamics may be changes in sylviculture, climate change and atmospheric deposition. Based on the altered tree species composition it can be concluded that a simple ≪copying≫ (mimicking) of the processes taking place in natural forests may not guarantee the conservation of the multifunctional character of the respective forests.

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Tree ring to climate relationships of Aleppo pine (Pinus halepensis Mill.) in Greece

Ecologia mediterranea ◽

10.3406/ecmed.2001.1908 ◽

2001 ◽

Vol 27 (1) ◽

pp. 89-98 ◽

Cited By ~ 3

Author(s):

Andreas Papadopoulos ◽

Françoise Serre-Bachet ◽

Lucien Tessier

Keyword(s):

Tree Ring ◽

Pinus Halepensis ◽

Aleppo Pine

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Testing the potential of pollen assemblages to capture composition, diversity and ecological gradients of surrounding vegetation in two biogeographical regions of southeastern Europe

Vegetation History and Archaeobotany ◽

10.1007/s00334-021-00831-4 ◽

2021 ◽

Author(s):

Maria Papadopoulou ◽

Ioannis Tsiripidis ◽

Sampson Panajiotidis ◽

Georgios Fotiadis ◽

Daniel Veres ◽

...

Keyword(s):

Vegetation Structure ◽

Diversity Indices ◽

Life Forms ◽

Ecological Gradients ◽

Vegetation Diversity ◽

North Central ◽

Plant Life Forms ◽

Pollen Diagrams ◽

Biogeographical Regions ◽

Species Specific

AbstractDue to the complex relationship between pollen and vegetation, it is not yet clear how pollen diagrams may be interpreted with respect to changes in floristic diversity and only a few studies have hitherto investigated this problem. We compare pollen assemblages from moss samples in two southeastern European forests with the surrounding vegetation to investigate (a) their compositional similarity, (b) the association between their diversity characteristics in both terms of richness and evenness, and (c) the correspondence of the main ecological gradients that can be revealed by them. Two biogeographical regions with different vegetation characteristics, the Pieria mountains (north central Greece) and the slopes of Ciomadul volcano (eastern Romania), were chosen as divergent examples of floristic regions, vegetation structure and landscape openness. Pollen assemblages are efficient in capturing the presence or absence, rather than the abundance in distribution of plants in the surrounding area and this bias increases along with landscape openness and vegetation diversity, which is higher in the Pieria mountains. Pollen assemblages and vegetation correlate better in terms of richness, that is, low order diversity indices. Relatively high correlation, in terms of evenness, could be potentially found in homogenous and species poor ecosystems as for Ciomadul. Composition and diversity of woody, rather than herb, vegetation is better reflected in pollen assemblages of both areas, especially for Pieria where a direct comparison of the two components was feasible, although this depends on the species-specific pollen production and dispersal, the openness of landscape and the overall diversity of vegetation. Gradients revealed by pollen assemblages are highly and significantly correlated with those existing in vegetation. Pollen assemblages may represent the vegetation well in terms of composition, diversity (mainly richness) and ecological gradients, but this potential depends on land use, vegetation structure, biogeographical factors and plant life forms.

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