Effects of thinning paper birch on conifer productivity and understory plant diversity

Baleshta, Karen E.; Simard, Suzanne W.; Roach, W. Jean

doi:10.1080/02827581.2015.1048715

Cited by 8 publications

(11 citation statements)

References 53 publications

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“…Similar findings were reported by Cruickshank et al (2018). In contrast, a study by Baleshta et al (2015) A c c e p t e d M a n u s c r i p t did reveal how the presence of naturally regenerated broadleaf trees (specifically Betula papyrifera) can reduce mortality due to A. ostoyae and increase productivity of conifer plantations (specifically Pseudotsuga menziesii var. glauca).…”

Section: Silvicultural Measuressupporting

confidence: 75%

“…Complex responses were obtained when different densities of resistant and susceptible species were tested (Baleshta et al 2015;Metslaid et al 2018). In both studies, an optimal density of resistant or susceptible species was found, suggesting an equilibrium between the effect of competition among susceptible and resistant species and the probability of disease spread.…”

Section: Silvicultural Measuresmentioning

confidence: 91%

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Latest advances and future perspectives inArmillariaresearch

Heinzelmann

Dutech

Tsykun

et al. 2019

Canadian Journal of Plant Pathology

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The basidiomycete genus Armillaria s.l. (Armillaria s.s. and Desarmillaria) has a worldwide distribution and plays a central role in the dynamics of numerous woody ecosystems, including natural forests, tree plantations for timber production, orchards, vineyards, and gardens. Early studies have shown that all Armillaria species are capable of degrading dead woody substrates causing white rot. Moreover, most species exhibit a parasitic ability, and can be considered as facultative necrotrophs. Although over the years extensive research has been conducted on the phylogeny, biology, and ecology of different Armillaria species, numerous theoretical and applied questions remain open. Recently published studies have provided new perspectives, the most significant of which we present in this review. First, new investigations have highlighted the importance of a multilocus approach for depicting the phylogeny of the genus Armillaria. Second, the importance of clonality and sexuality for the different species is now better described, enabling a more accurate prediction of population dynamics in various environments. Third, genome sequencing has provided new insights into genome evolution and the genetic basis of pathogenicity and wood degradation ability. Fourth, several new studies have pointed out the possible influence of climate change on Armillaria distribution, biology and ecology, raising questions regarding the future evolution of Armillaria species and their effect on ecosystems. In this review, we also give a state-of-the-art overview of the control possibilities of parasitic Armillaria species. Finally, we outline some still open questions in Armillaria research, the investigation of which will strongly benefit from recent methodological advances.

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Section: Silvicultural Measuressupporting

confidence: 75%

Section: Silvicultural Measuresmentioning

confidence: 91%

Latest advances and future perspectives inArmillariaresearch

Heinzelmann

Dutech

Tsykun

et al. 2019

Canadian Journal of Plant Pathology

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“…This may be explained by the low shade tolerance of Betula spp. (Baleshta et al 2015), which typically require canopy disturbance to promote growth of Betula spp. seedlings in the understory.…”

Section: Discussionmentioning

confidence: 99%

Species-specific determinants of mortality and recruitment in the forest-steppe ecotone of northeast China

ZengNan¹,

Yao²,

ZhouMei³

et al. 2016

The Forestry Chronicle

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Tree mortality is a notable phenomenon in the forest-steppe ecotone of China. However, the association between mortality and factors such as a changing climate is uncertain. In the summer of 2014 tree mortality was investigated in 20 ϫ 400 m 2 plots to determine the species-specific determinants of mortality and their influence on subsequent species recruitment. Nine soil physical-chemical properties were examined in addition to slope position, mean DBH and total number of trees. Generalized linear models analyzed relationships between these variables and mortality and recruitment. Mortality was positively associated with increasing average diameter and negatively to high soil pH and total nitrogen content. Recruitment models indicate that Populus davidiana recruitment was positively affected by available phosphorus and mortality, and negatively related to mean DBH. Slope position was the most important contributing variable to Betula platyphylla recruitment. With Quercus mongolica recruitment, soil variables played an important role. These results suggest that tree mortality is affected by soil properties, topography and tree size in China's forest-steppe ecotone, and may improve our understanding of species mortality and contribute to improved forest management.Key words: tree mortality, forest-steppe ecotone, recruitment, broad-leaved forests RÉSUMÉLa mortalité des arbres est un phénomène marquant dans l' écotone de la steppe boisée de la Chine. Cependant, il n' est pas facile d'associer la concordance entre la mortalité et à divers facteurs comme les changements climatiques est incertaine. Au cours de l' été l' été 2014, nous avons examiné la mortalité des arbres a été étudiée dans desà l'aide de parcelles de 20 x 400 m afin de déterminer les causes spécifiques de mortalité pour chaque espèceessence et leur influence sur le dévelop-pement subséquent des espèceessences. Les analyses ont porté sur nNeuf propriétés physico-chimiques du sol ont été analysées, en plus de l' emplacement selonla position sur la pente, le du dhp DHP moyen et le du nombre total d'arbres. On s' est servi de Des modèles linéaires généralisés généraux ont servi à l'analyse despour analyser les relations entre ces variables et la mortalité et le recrutement. L'analyse a montré une corrélation positive avec la croissance en La mortalité était positivement associée à l'accroissement du diamètre moyen et négativement reliée à l'augmentation du pH du sol et du contenu en azote total. Les modèles de recrutement indiquent que le recrutement du Populus davidiana était lié au était positivement affecté par le phosphore disponible et à la mortalité, et négativement relié audiminuait avec le dhp DHP moyen. L' emplacement selonLa position sur la pente représentaite la variable la plus importante pour le recrutement du Betula platyphylla. Dans le cas du recrutement du Quercus mongolica, ce sont les variables du sol qui ont eu le plus d'influenceont joué un rôle déterminant. Ces résultats indiquent laissent voir que la mortalité des arbres dé...

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“…The total weight of the soil sample of each layer is about 1 kg, and the soil sample is brought back to the laboratory under natural conditions. After air drying, the roots and gravel visible to the naked eye and the roots and coarse sand with a 1 mm mesh sieve are (Baleshta and Simard, 2015). At the same time, according to the soil profile of farmland, the ring knife and sealant seal are extracted and brought back to the laboratory to analyze the main physical indexes of farmland soil, record the rock exposure rate of the sample plot, soil thickness, color, texture, root volume and amount of gravel.…”

Section: Collection Of Farmland Soil Samples and Analysis Of Their Physicochemical Propertiesmentioning

confidence: 99%

“…The results also show that the four indexes of plant diversity in different grades of rocky desertification environment are significantly different: (1) The uniformity index of rockless desertification environment is significantly larger than the potential rocky desertification, and the potential rocky desertification is significantly larger than the mild, moderate and intensity rock desertification. (2) The environmental richness index of rockless desertification and mild rocky desertification is significantly larger than that of potential rocky desertification. (3) The environmental diversity index of rockless desertification, potential rocky desertification and mild rocky desertification is significantly smaller than that of intensity rock desertification.…”

Section: Plant Diversitymentioning

confidence: 99%

Correlation Between Plant Diversity and the Physicochemical Properties of Soil Microbes

Sun¹

2019

Appl. Ecol. Env. Res.

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OBJECTIVE: To study the correlation between plant diversity and the physicochemical properties of soil microbes. METHODS: The determination of the chemical properties of farmland soil in the research area can be achieved by potentiometer method, automatic analyzer method, molybdenumantimony anti-colorimetric method and gas chamber method. Based on the determination results, the relationship between plant diversity and soil microbial physical and chemical properties in the national nature reserve in rocky desertification area can be analyzed. RESULTS: The physical and chemical properties of soil in different grades of rocky desertification were significantly different. With the increase of rocky desertification, soil physical and chemical properties showed a response process from degradation to improvement. Soil organic matter, nitrogen, capillary water holding capacity, bulk density and porosity were significantly correlated with plant diversity, which played an important role in improving soil physical and chemical properties and promoting the restoration of plant diversity. Factor analysis showed that plant diversity at different levels in national nature reserves had different correlation with soil physical and chemical factors at different levels. The ratio between the significant correlation factors and the number of plants showed that the diversity of trees was greater than that of shrubs, and the diversity of shrubs was greater than that of herbaceous plants. Tree plant diversity factor plays a leading role. CONCLUSION: With the proposed method the physicochemical properties of soil microbes can be effectively studied.

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Effects of thinning paper birch on conifer productivity and understory plant diversity

Cited by 8 publications

References 53 publications

Latest advances and future perspectives inArmillariaresearch

Latest advances and future perspectives inArmillariaresearch

Species-specific determinants of mortality and recruitment in the forest-steppe ecotone of northeast China

Correlation Between Plant Diversity and the Physicochemical Properties of Soil Microbes

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