Relevance of Broad-Leaved Forest Stands for Maintaining Epiphytic Bryophyte Species and Functional Trait Diversity in Forest Landscape in Latvia (original) (raw)
Related papers
Biodiversity and Conservation
Cryptogamic diversity is a reliable indicator of the state of forest ecosystems. In this study we analysed the variations in both bryophyte species richness overall and number of hemerophobic bryophyte species in Central European managed forests over a 20-year time span, based on data collected in 132 plots scattered across Poland. We tested differences in species richness among five temporal replicates, as well as among site types grouped based on elevation a.s.l., dominant tree species and stand age. The analyses revealed no significant trend in species richness across years. Meanwhile, species richness significantly increased along with elevation a.s.l., especially in broadleaved forests. No significant difference in species number between spruce and pine dominated stands emerged for mature stands, while there was a strong difference for young stands, with spruce forest hosting a much higher number of species. Species richness exhibited a slight, but not significant, increase ove...
Decline in bryophyte diversity in predominant types of central European managed forests
Biodiversity and Conservation, 2015
The extent to which the diversity of forest-inhabiting bryophytes is related to forest management practices has been the subject of a recent study. However, the question of how these practices affect the spatial distribution pattern of bryophyte diversity throughout managed European forests remains unanswered. We surveyed bryophyte diversity in six large forest complexes in the Czech Republic. Our sites encompass a range of managed forest stands (including various temporal phases such as clearings and young forests) across a gradient of environmental conditions. In general, the bryophyte species richness in managed forests was less than in unmanaged forests. Only unmanaged forest stands that provided suitable substrates such as large dead woody debris and large diameter beeches (Fagus sylvatica) were able to support rare bryophyte species. Mature managed forests with simplified tree structure, dominated by either deciduous or coniferous species shared similar bryophyte species richness (a-diversity) and pool (c-diversity). It appears that forest management, which leads to the loss of old-growth forest attributes, may result in low-diversity bryophyte communities regardless of tree species composition. Nevertheless, bryophyte species turnover (b-diversity) was spatially uniform in mature managed forests dominated by conifers, but quite variable in those dominated by deciduous tree species. Managed forests with diverse tree structure and composition approximated the Communicated by T.G. Allan Green.
European Journal of Forest Research
Bryophytes respond to a variety of environmental factors, including tree species composition and geological conditions, which are influenced by both natural and anthropogenic factors. Bryophytes growing on a variety of substrates were identified in ICP Forests monitoring plots in a wide range of close-to-nature managed forests, from lowland to high mountain areas in Slovenia. Based on data on tree layer composition (broadleaves vs. conifers) and on bedrock and soil type (calcareous vs. siliceous bedrock), all study plots were classified into five groups representing forest types. Different ordination analyses and statistical tests were used to represent differences between forest types in bryophyte composition, richness and functional traits. Almost 200 bryophyte species were identified in managed forests, with the most common being Hypnum cupressiforme, Brachytheciastrum velutinum and Polytrichum formosum. Bryophyte species composition varied considerably along the tree species com...
Plants
It has been widely documented that the complex structure of forest ecosystems supports considerable bryophyte species and functional diversity. In this study, we assessed the diversity, distribution and ecological and phytogeographical features of bryophytes across a gradient of temperate forest types on Mt. Papuk. This is the largest and highest mountain in the lowland, Pannonian part of Croatia, with high geological diversity and various temperate forests covering 95% of the mountain. According to the predominant tree species (oak vs. beech), geological bedrock (calcareous vs. siliceous) and soil reaction (alkaline vs. acidic), 21 study plots were classified into four distinct forest types. In all, 184 bryophyte species (35 liverworts and 149 mosses) were recorded. Although the forest types investigated did not differ significantly with respect to species richness, each was characterized by a considerable number of diagnostic bryophyte species. According to our results, one of the...
Folia Cryptogamica Estonica, 2021
Forest landscape plays a significant role in rare cryptogam distribution. However, data about the environmental demands of rare epiphytic bryophytes and lichens in boreo-nemoral forest landscapes are not complete. In this study, we focused on finding the main environmental predictors influencing the occurrence of three red-listed epiphytic bryophytes and three red-listed epiphytic lichens in the Latvian boreo-nemoral forest landscape. We obtained the records of species from the Natural Data Management System OZOLS database, which is a national information system on all rare taxa. We analyzed the occurrence of species in relation to forest stand age and area, forest type, heterogeneity and tree bark pH class. We found that selected red-listed bryophyte and lichen occurrence was mainly influenced by forest stand age and area. However, each of the red-listed epiphytic bryophyte and lichen has their own ecological demands in the boreo-nemoral landscape.
Response of Bryophytes to Disturbances in Managed Forests. A Case Study from a Polish Forest
Cryptogamie, Bryologie
Forest management practices fundamentally impact the structure of a forest (relatively young stage of forest development, dominating stands with only one or two species of trees, planting coniferous tree species on habitats of deciduous forests, introducing alien tree species, very limited volume of dead wood). Bryophytes are especially sensitive to silvicultural practices. Th e aim of this study was to examine the importance of particular substrates for maintaining bryophyte species diversity in the Murckowski Forest (Silesian Upland S Poland), which is at present a managed forest. In 100 sampling plots, the structure of the forest and the species composition, frequency and abundance of bryophytes on diff erent types of substrates (ground, tree base, tree trunk and dead wood) were analysed. In total, 54 bryophyte species were recorded (fi ve liverworts and 49 mosses). Th e largest number of species was observed on dead wood (42), while the lowest number was of typical epiphytes growing on tree trunks bark more than 30 cm above the ground (18). Th is study confi rms that dead wood is a key habitat and determines not only the number of epixylic species, but also the whole richness of bryophyte species. Maximal diameter of trees and presence of old tree stands were signifi cant factors for species that were colonizing the tree bases.
Journal of Bryology, 2016
Species richness, composition and abundance of the bryophyte diaspore bank of Central European temperate mixed forests were compared with the forest-floor bryophyte assemblage. The impact of environmental variables and anthropogenic disturbances, including tree species composition, stand structure, microclimate, light conditions, soil and litter properties, management history, and landscape properties, potentially influencing bryophyte diaspore bank assemblages were explored. Thirty-four, 70-100 years old mixed stands with differing tree species composition were examined in the Ő rség National Park, Western Hungary. The diaspore bank was studied by soil collection and cultivation, and data were analysed by multivariate methods. Contrary to the forest-floor bryophyte assemblage, where substrate availability, tree species composition and stand structure were the most influential environmental variables, the composition and abundance of the diaspore bank was mainly affected by site conditions (microclimate, litter and soil properties). Species richness of the bryophyte diaspore bank was lower than that of the forest-floor bryophyte assemblage. Short-lived mosses (colonists, short-lived shuttles) were dominant in the diaspore bank, as opposed to the forest-floor bryophyte community, where perennial mosses dominated. In the studied forests, the importance of the bryophyte diaspore bank was relatively low in the regeneration and maintenance of the forest-floor bryophyte vegetation.