Download or read book Rainfall Partitioning and Soil Water Dynamics Along a Tree Species Diversity Gradient in a Deciduous Old growth Forest in Central Germany written by Inga Krämer and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Precipitation Partitioning by Vegetation written by John T. Van Stan, II and published by Springer Nature. This book was released on 2020-01-01 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents research on precipitation partitioning processes in vegetated ecosystems, putting them into a global context. It describes the processes by which meteoric water comes into contact with the vegetation's canopy, typically the first surface contact of precipitation on land. It also discusses how precipitation partitioning by vegetation impacts the amount, patterning, and chemistry of water reaching the surface, as well as the amount and timing of evaporative return to the atmosphere. Although this process has been extensively studied, this is the first review of the global literature on the partitioning of precipitation by forests, shrubs, crops, grasslands and other less-studies plant types. The authors offer global contextualization combined with a detailed discussion of the impacts for the climate and terrestrial ecohydrological systems. As such, this comprehensive overview is a valuable reference tool for a wide range of specialists and students in the fields of geoscience and the environment.

Download or read book Rainfall Partitioning and Soil Water Dynamics in Deciduous Forest of Variable Tree Species Diversity written by Meik Meißner and published by . This book was released on 2007 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Hydrology and Biogeochemistry written by Delphis F. Levia and published by Springer Science & Business Media. This book was released on 2011-06-15 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: This international rigorously peer-reviewed volume critically synthesizes current knowledge in forest hydrology and biogeochemistry. It is a one-stop comprehensive reference tool for researchers and practitioners in the fields of hydrology, biogeoscience, ecology, forestry, boundary-layer meteorology, and geography. Following an introductory chapter tracing the historical roots of the subject, the book is divided into the following main sections: · Sampling and Novel Approaches · Forest Hydrology and Biogeochemistry by Ecoregion and Forest Type · Hydrologic and Biogeochemical Fluxes from the Canopy to the Phreatic Surface · Hydrologic and Biogeochemical Fluxes in Forest Ecosystems: Effects of Time, Stressors, and Humans The volume concludes with a final chapter that reflects on the current state of knowledge and identifies some areas in need of further research.

Download or read book Bark Water Interactions written by Salli F. Dymond and published by Frontiers Media SA. This book was released on 2022-01-18 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Climbing Plants of West Africa written by Frans Bongers and published by CABI. This book was released on 2005 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climbing plants, including lianas, represent a fascinating component of the ecology of tropical forests. This book focuses on the climbing plants of West African forests. Based on original research, it presents information on the flora (including a checklist), diversity (with overviews at several levels of integration), ecology (distribution, characteristics in relation to environment, their role in forest ecosystems) and ethnobotany. Forestry aspects, such as their impact on tree growth and development, and the effects of forestry interventions on climbers are also covered.

Download or read book Causes and Consequences of Species Diversity in Forest Ecosystems written by Aaron M. Ellison and published by MDPI. This book was released on 2019-07-30 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Causes and Consequences of Species Diversity in Forest Ecosystems that was published in Forests

Download or read book Forest Water Interactions written by Delphis F. Levia and published by Springer Nature. This book was released on 2020-02-05 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United Nations has declared 2018-2028 as the International Decade for Action on Water for Sustainable Development. This is a timely designation. In an increasingly thirsty world, the subject of forest-water interactions is of critical importance to the achievement of sustainability goals. The central underlying tenet of this book is that the hydrologic community can conduct better science and make a more meaningful impact to the world’s water crisis if scientists are: (1) better equipped to utilize new methods and harness big data from either or both high-frequency sensors and long-term research watersheds; and (2) aware of new developments in our process-based understanding of the hydrological cycle in both natural and urban settings. Accordingly, this forward-looking book delves into forest-water interactions from multiple methodological, statistical, and process-based perspectives (with some chapters featuring data sets and open-source R code), concluding with a chapter on future forest hydrology under global change. Thus, this book describes the opportunities of convergence in high-frequency sensing, big data, and open source software to catalyze more comprehensive understanding of forest-water interactions. The book will be of interest to researchers, graduate students, and advanced undergraduates in an array of disciplines, including hydrology, forestry, ecology, botany, and environmental engineering.

Download or read book Vegetation Ecology of Central Europe written by Heinz Ellenberg and published by Cambridge University Press. This book was released on 1988-07-29 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: No other book discusses so many principles relevant not only to plant ecologists in continental Europe, but in the British Isles and North America.

Download or read book Carbon and Nitrogen Cycling in European Forest Ecosystems written by Ernst-Detlef Schulze and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume quantifies carbon storage in managed forest ecosystems not only in biomass, but also in all soil compartments. It investigates the interaction between the carbon and nitrogen cycles by working along a north-south transect through Europe that starts in northern Sweden, passes through a N-deposition maximum in central Europe and ends in Italy. For the first time biogeochemical processes are linked to biodiversity on a large geographic scale and with special focus on soil organisms. The accompanying CD-ROM provides a complete database of all flux, storage and species observations for modellers.

Download or read book Drivers of Plant Diversity and Distribution in a Northern Hardwood Forest Interacting Effects of Biotic and Abiotic Factors written by Raleigh Dean Ricart and published by . This book was released on 2019 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drivers of plant diversity and community composition are often influenced by deterministic mechanisms, such as existing environmental conditions, including landscape-level topographic features. In addition, evidence suggests that stochastic mechanisms can also play a critical role in plant community assemblage. Therefore, I investigated how diversity and composition are distributed through space in a mid- successional mixed hardwood forest in northern lower Michigan, USA. This region has been heavily influenced by its glacial past, which resulted in geographically and abiotically distinct glacial landforms that have been shown to influence spatial dynamics of forest communities. Vegetation sampling plots (n=87) were established at the University of Michigan Biological Station (UMBS). Vegetation data of the overstory (>9cm dbh), sapling (1.5-9cm dbh) and groundcover (% cover) layers were collected. Abiotic variables, including elevation, pH, and soil nutrients, were collected in a subset of plots (n=40). I conducted various multivariate statistical analyses to assess the difference in plant communities and abiotic condition, including ANOVA, Variation Partitioning, PERMANOVA, NMDS, and RDA. Variation Partitioning results demonstrated that both deterministic and stochastic mechanisms influenced the community composition of all vegetation layers, however the overstory was mostly influenced by stochastic mechanisms, while the sapling and groundcover layers were opposite. ANOVA results showed strong differences in diversity between glacial landforms. Additionally, PERMANOVA and Non-metric Multidimensional Scaling (NMDS) showed strong differences in community composition between the glacial landforms. Redundancy Analysis (RDA) revealed a strong influence of abiotic variables on composition, with the strongest effects coming from elevation and O horizon depth (O_depth). My findings indicate a large influence of glacial landforms on the production and maintenance of local plant diversity and community composition in this area. Plant diversity and composition are also strongly influenced by successional dynamics following a disturbance event. Moreover, spatial and temporal dynamics are interactive, and rates of successional advancement can be variable depending on underlying spatial gradients. I investigated how diversity and composition are distributed through time using the same system and vegetation data described above. However, vegetation sampling plots were censused in 1990 and again in 2015, which allowed for me to track compositional change over a 25-year-period. ANOVA results showed relatively stable levels of species diversity between census periods. In addition, PERMANOVA results revealed very little difference in community composition over the twenty-five-year period. Furthermore, we found no evidence of differences in successional rates between landforms. My findings suggest that successional dynamics may manifest themselves over much longer time periods in these northern biomes. Finally, I tested the effects of competition of Pteridium aquilinum (“bracken” fern) on the growth and survival of two prominent tree seedlings, Pinus strobus and Acer saccharum. Furthermore, I was interested in how above- and belowground competition from bracken varied across a fertility gradient. Twelve plots were established in four bracken-dominated stands at the UMBS. Seedlings of both species were subjected to one of the following treatments: aboveground competition removal, belowground competition removal, above- and belowground competition removal, and control. Each replicate was a split-plot design, where the soil fertility in half of the plot was altered using nitrogen fertilizer. Differences across collected variables were analyzed using ANOVA. Bracken had an overall negative effect on the growth of both seedlings, with significantly lower values for Relative Growth Rate in both shoot and root biomass under full bracken- competition treatments. There was no difference between fertility treatments, suggesting that competitive strategy does not change with increased availability of soil nitrogen. Finally, there was a significant difference between the overall performance of the two species, where P. strobus outperformed A. saccharum across most of the collected variables. This suggests a possible species-specific “filtering effect” of bracken that may have long-term consequences for the composition of future forests in the area.

Download or read book Forest Canopies written by Margaret Lowman and published by Academic Press. This book was released on 2004-09 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: The treetops of the world's forests are where discovery and opportunity abound, however they have been relatively inaccessible until recently. This book represents an authoritative synthesis of data, anecdotes, case studies, observations, and recommendations from researchers and educators who have risked life and limb in their advocacy of the High Frontier. With innovative rope techniques, cranes, walkways, dirigibles, and towers, they finally gained access to the rich biodiversity that lives far above the forest floor and the emerging science of canopy ecology. In this new edition of Forest Canopies, nearly 60 scientists and educators from around the world look at the biodiversity, ecology, evolution, and conservation of forest canopy ecosystems. Comprehensive literature list State-of-the-art results and data sets from current field work Foremost scientists in the field of canopy ecology Expanded collaboration of researchers and international projects User-friendly format with sidebars and case studies Keywords and outlines for each chapter

Download or read book Impact of Tree Species Diversity on Water and Carbon Relations in European Forests written by Charlotte Grossiord and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiversity is known to support and boost a wide range of forest ecosystem functions and services like productivity and resistance against insect pests and diseases. However, whether tree species diversity also promotes water and carbon acquisition and use in forest ecosystems is still unclear. Furthermore, in the current context of global warming, information on how tree species diversity can influence the response of forest ecosystems to extreme climatic events such as drought are urgently needed. In this framework, the objective of my PhD thesis was to determine how tree species diversity influences important functions of the water and carbon cycle including transpiration, carbon isotope composition and water extraction depth at the tree- and ecosystem-Scale under contrasting soil water conditions. My work was conducted within the FunDivEUROPE project in a network of permanent forest stands and tree plantations across a North-South gradient in Europecovering a wide range of climatic conditions. I found considerable variability among species or forest types in the response of transpiration and carbon isotope composition at the tree- and ecosystem-Scale across Europe. Species diversity did not affect the water and carbon relations of tree species and forest ecosystems under non-Limiting soil water conditions. However, a strong effect of species diversity was observed under drought conditions in some forest types. Based on these data, I discuss the potential mechanisms of species interactions that may explain the observed patterns. I also point out that the influence of species diversity is highly context-Dependent, and changes with local environmental and climatic conditions. In terms of forest management applications, I suggest that, at least in some regions, controlling for tree species diversity along with stand density and total basal area could be recommended to help forests adapt to drier conditions.

Download or read book Patterns and Mechanisms of Tree Species Diversity Effects on Fine Root Processes Associated with Stand Development in Boreal Forests written by Zilong Ma and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last two decades, one major advance in ecology has been the demonstration that biodiversity has positive effects on a broad range of ecosystem functions. However, diversity-ecosystem functioning studies for belowground are underrepresented, due to methodological limitations and the relative inaccessibility to root systems. This lack of understanding of belowground processes has cast doubt on the predictability of various ecosystem models; the forecasting of which serve as the basis for numerous global policies. The objective of this dissertation, therefore, is to improve the understanding of patterns and mechanisms of tree species diversity effects on fine root processes associated with stand development in natural forest ecosystems. To achieve this goal, I initially conducted a global meta-analysis on the effects of species diversity on fine root productivity in diverse ecosystems by synthesizing the results of 48 published studies. This meta-analysis demonstrated a positive mixture effects on fine root biomass and production, and showed that the mixture effects increased with species richness across all ecosystem types. More importantly, the meta-analysis also revealed shifts in diversity effects over time in both forests and grasslands. Inspired by the results of the meta-analysis, I conducted an empirical diversity experiment in the central region of the North American natural boreal forest, to examine the temporal (seasonal and developmental) changes in fine root production, and their underlying mechanisms associated with tree species diversity. I found that annual fine root production was higher in mixtures than the mean of single species dominated stands in all age classes, with a significantly higher magnitude of effects in mature than young stands. My results also indicated that the increased positive diversity effects with stand development was the result of multiple mechanisms, including higher horizontal soil volume filling, a thicker forest floor layer for rooting, a higher magnitude of complementarity in deep nutrient-poor soil layers, and stronger nutrient foraging toward soil layers with high nutrient concentrations in older than younger stands. Whether the results obtained on productivity can be generalized to other ecosystem processes remains patchy. I therefore examined species mixture effects on fine root turnover and mortality along stand development. I found that like biomass production, fine root turnover and mortality were also higher in mixtures than the mean of single-species-dominated stands in all age classes, with a higher mixture effects in mature than young stands. Moreover, my results suggested that increased mixture effects with stand development resulted from a higher competition intensity that was induced by the overyielding of fine root biomass production in mixtures. Moreover, most published diversity and productivity relationship (DPR) studies focus on one component of ecosystem production. Species diversity could alter production allocation, at least, in part, contributing to divergent DPR relationships. By synthesizing the production data of all individual components (i.e., aboveground trees, litterfall, understory vegetation, coarse roots, and fine roots) of boreal forest stands, collected from the same study sites, I examined how species mixtures affected the production of the entire ecosystem, and production partitioning among individual components along stand development. I found that the overyielding of the entire ecosystem production occurred in young stands, but not in older stands, despite the fact that fine root production was higher in species mixtures than single-species dominated stands in all ages. Species mixtures led to more production allocated to belowground than expected from single species-dominant stands. These studies offer a new and important understanding of DPR by showing the temporal changes of mixture effects on fine root dynamics (i.e., production, turnover, and mortality), production allocation, and their underlying mechanisms. The results have relevance for calculating the energy allocation, as well as the carbon storage of terrestrial ecosystems, and may provide a broad guide for management practices with the aim of increasing belowground productivity, element cycling, and carbon sequestration.

Download or read book Tropical Forest Community Ecology written by Walter Carson and published by John Wiley & Sons. This book was released on 2011-08-31 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, tropical ecology has been a science often content with descriptive and demographic approaches, which is understandable given the difficulty of studying these ecosystems and the need for basic demographic information. Nonetheless, over the last several years, tropical ecologists have begun to test more sophisticated ecological theory and are now beginning to address a broad array of questions that are of particular importance to tropical systems, and ecology in general. Why are there are so many species in tropical forests and what mechanisms are responsible for the maintenance of that vast species diversity? What factors control species coexistence? Are there common patterns of species abundance and distribution across broad geographic scales? What is the role of trophic interactions in these complex ecosystems? How can these fragile ecosystems be conserved? Containing contributions from some of the world’s leading tropical ecologists, Tropical Forest Community Ecology provides a summary of the key issues in the discipline of tropical ecology: Includes contributions from some of the world’s leading tropical ecologists Covers patterns of species distribution, the maintenance of species diversity, the community ecology of tropical animals, forest regeneration and conservation of tropical ecosystems

Download or read book The Water and Energy Dynamics of an Old growth Seasonal Temperate Rainforest written by Timothy E. Link and published by . This book was released on 2001 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Pacific Northwest (PNW), concern about the impacts of climate and land cover change on water resources, flood-generating processes, and ecosystem dynamics emphasize the need for a mechanistic understanding of the interactions between forest canopies and hydrological processes. A detailed measurement and modeling program during the 1999 and 2000 hydrologic years characterized hydrological conditions and processes in a 500-600 year old Douglas fir-western hemlock seasonal temperate rainforest. The measurement program included sub-canopy arrays of radiometers, tipping bucket rain gauges, and soil temperature and moisture probes, to supplement a vertical temperature and humidity profile within the forest canopy. Analysis of the precipitation interception characteristics of the canopy indicated that the mean direct throughfall proportion was 0.36, and the mean saturation storage was 3.3 mm. Evaporation from small storms insufficient to saturate the canopy comprised 19% of the net interception loss, and canopy drying and evaporation during rainfall accounted for 47% and 33% of the net loss, respectively. Results of the measurement program were used to modify the Simultaneous Heat and Water (SHAW) model for forested systems. Changes to the model include improved representation of interception dynamics, stomatal conductance, and within-canopy energy transfer processes. The model effectively simulated canopy air and vapor density profiles, snowcover processes, throughfall, soil water content profiles, shallow soil temperatures, and transpiration fluxes for both a calibration period and for an uncalibrated year. Soil warming at bare locations was delayed until most of the snowcover ablated due to the large heat sink associated with the residual snow patches. During the summer, simulated evapotranspiration decreased from a maximum monthly mean of 2.17 mm day−1 in July to 1.34 mm day−1 in September, as a result of declining soil moisture and net radiation. Our results indicate that a relatively simple parameterization of the SHAW model for the vegetation canopy can accurately simulate seasonal hydrologic fluxes in this environment. Application and validation of the model in other forest systems will establish similarities and differences in the interactions of vegetation and hydrology, and assess the sensitivity of other systems to natural and anthropogenic perturbations.

Download or read book Effects of Tree Species Diversity and Soil Drought on Productivity Water Consumption and Hydraulic Functioning of Five Temperate Broad leaved Tree Species written by Torben Lübbe and published by . This book was released on 2015 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiversity is by now widely known to strengthen functioning and services, like primary production and element cycling, for a broad range of ecosystem types. However, it is less clear yet if and how this relationship also applies for forest ecosystems. Moreover, trees are supposed to be highly susceptible to deficient water supply. In this context, it seems to be most interesting whether mixed species forests might be better buffered against the climate change-induced threat of increasing drought events than monocultural stands. Under consideration of these questions a tree diversity exper...