Download or read book Mobilization of Soil Dissolved Organic Matter in Mesic Boreal Forests of Newfoundland and Labrador Canada written by Keri L. Bowering and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mobilization of soil dissolved organic matter (DOM) distributes carbon and nutrients within ecosystems and links terrestrial to aquatic environments. As a hydrologically and biogeochemically mediated flux, DOM mobilization encapsulates a number of interacting ecological processes. This presents a major challenge for identifying the main drivers of DOM mobilization at different spatial and temporal scales. In this thesis, I use two mesic boreal forest research platforms to investigate the drivers of DOM mobilization from the organic horizon at different spatiotemporal scales. Using an experimentally harvested site, I show that total annual DOC flux from O horizons is due to both vertical and lateral flow, and was 30% percent greater in the harvested plots with significantly reduced organic horizons. Additionally, the C:N of DOM and absorbance characteristics of samples in both treatments demonstrated a stronger control of season over harvesting on the composition of DOM mobilized. One of the most significant of these seasonal controls was the snowpack insulation throughout winter. The lower C:N, higher SUVA254nm and lower molecular weight of chromophoric DOM mobilized during winter and snowmelt indicates relatively more decomposed DOM, compared to that mobilized in summer and autumn. This shows that the decomposition of soil organic matter underneath a consistently deep snowpack is a key determinant of the composition of DOM mobilized from O horizons during winter and the hydrologically significant snowmelt period. Additionally, I show that air temperature and snowpack duration best explain DOM mobilization dynamics both interannually within boreal sites and among boreal forest sites along a climate transect. This suggests that air temperature indirectly affects DOC mobilization through a direct control on snowpack season length in these forests. Furthermore, climate influenced differences in ecosystem properties such as organic horizon thickness, moss coverage and stand density, may additionally influence DOM mobilization through a direct control on soil hydrology. These results enhance our understanding of the relationship between boreal forest soil organic matter and soil DOM and the potential impacts of climate change on soil organic matter losses as DOM, contributing to a predictive understanding of forest C and nutrient distribution and the potential effect on aquatic environments.
Download or read book Seasonal and Spatial Variation in the Chemical Character of Dissolved Organic Matter Within a Small Boreal Forest Watershed written by Alexander W. Newman and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissolved organic matter (DOM) is a significant carbon reservoir and component of the terrestrial-to-aquatic flux (Qualls et al., 1991). The terrestrial-to-aquatic carbon flux, a relatively new addition to global carbon models, is currently estimated to transfer a total of 1.7 petagrams (Pg) carbon (C) yr−1 globally (IPCC, 2013). Terrestrially derived DOM has been identified as a significant pool of organic matter in the aquatic environment. However, the quantity and chemical composition of DOM transferred, as well as the mechanisms driving its transfer, are less understood. This thesis focuses on expanding our knowledge of the processing DOM undergoes as it is transferred from terrestrial-to-aquatic environments by: 1) developing a standardized extraction methodology that can yield representative eluates when applied to sourced samples from throughout the terrestrial-to-aquatic interface and 2) applying the designed methodology to conduct a year long study of DOM quantity and composition in the terrestrial-to-aquatic interface in a boreal forest watershed. Experimental results suggest that although solid phase extraction with a divinyl benzene sorbent (SPE-PPL) yields high extraction efficiencies when applied to DOM, it is subject to selectivity. Extractions performed at high loading volumes were found to select against O-alkyl DOM hydrogen constituents, additionally all SPE-PPL experiments were found to select against nitrogenous DOM components. However, by considering proper extraction parameters, SPE-PPL can produce bulk representative eluates for nuclear magnetic resonance (NMR) analysis from land positions spanning the terrestrial-to-aquatic interface. Results from the field study revealed that DOM transferred from terrestrial-to-aquatic land positions in a boreal forest watershed is both temporally and regionally variable, however, proximity immediately downstream of ponds appeared to be a major hydrologic control, while seasonal variation in hydrologic flow paths may represent another control in boreal forest watersheds. Dissolved organic matter chemical composition and quantity in traditional boreal forest streams related to shifts in the hydraulic flow path of the watershed, indicated by changes in riverine DOM chemical composition that correlated to seasonal wet and dry periods. Increases in both dissolved organic carbon (DOC) concentration and the presence of O-alkyl DOM hydrogen functionalities in the stream indicated a shift from groundwater sources during the dry period to soil water sources during the wet period. Conversely streams downslope of ponds seemed to be buffered against shifts in DOM chemical composition associated with changes in hydrologic flow paths. Dissolved organic matter chemical composition of streams downslope of ponds were relatively constant throughout the year resembling the characterization of pond outflows, even during periods of high hydraulic conductivity, via additions of autochthonous DOM produced in the pond. These additions of autochthonous DOM are negligible in streams not downslope of ponds. Further application of this approach during key periods of DOM export, such as spring snowmelt and fall rain periods may prove help to reveal the processes controlling the terrestrial-to-aquatic carbon flux in boreal forest landscapes.
Download or read book The Regional Impacts of Climate Change written by Intergovernmental Panel on Climate Change. Working Group II. and published by Cambridge University Press. This book was released on 1998 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cambridge, UK : Cambridge University Press, 1998.
Download or read book Climatic Change and Global Warming of Inland Waters written by Charles R. Goldman and published by John Wiley & Sons. This book was released on 2012-11-20 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of global warming on the physical, chemical, ecological structure and function and biodiversity of freshwater ecosystems are not well understood and there are many opinions on how to adapt aquatic environments to global warming in order to minimize the negative effects of climate change. Climatic Change and Global Warming of Inland Waters presents a synthesis of the latest research on a whole range of inland water habitats – lakes, running water, wetlands – and offers novel and timely suggestions for future research, monitoring and adaptation strategies. A global approach, offered in this book, encompasses systems from the arctic to the Antarctic, including warm-water systems in the tropics and subtropics and presents a unique and useful source for all those looking for contemporary case studies and presentation of the latest research findings and discussion of mitigation and adaptation throughout the world. Edited by three of the leading limnologists in the field this book represents the latest developments with a focus not only on the impact of climate change on freshwater ecosystems but also offers a framework and suggestions for future management strategies and how these can be implemented in the future. Limnologists, Climate change biologists, fresh water ecologists, palaeoclimatologists and students taking relevant courses within the earth and environmental sciences will find this book invaluable. The book will also be of interest to planners, catchment managers and engineers looking for solutions to broader environmental problems but who need to consider freshwater ecology.
Download or read book Arctic Human Development Report written by Joan Nymand Larsen and published by Nordic Council of Ministers. This book was released on 2015-02-18 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of the second volume of the AHDR – Arctic Human Development Report: Regional Processes and Global Linkages – are to provide an update to the first AHDR (2004) in terms of an assessment of the state of Arctic human development; to highlight the major trends and changes unfolding related to the various issues and thematic areas of human development in the Arctic over the past decade; and, based on this assessment, to identify policy relevant conclusions and key gaps in knowledge, new and emerging Arctic success stories. The production of AHDR-II on the tenth anniversary of the first AHDR makes it possible to move beyond the baseline assessment to make valuable comparisons and contrasts across a decade of persistent and rapid change in the North. It addresses critical issues and emerging challenges in Arctic living conditions, quality of life in the North, global change impacts and adaptation, and Indigenous livelihoods. The assessment contributes to our understanding of the interplay and consequences of physical and social change processes affecting Arctic residents’ quality of life, at both the regional and global scales. It shows that the Arctic is not a homogenous region. Impacts of globalization and environmental change differ within and between regions, between Indigenous and non-Indigenous northerners, between genders and along other axes.
Download or read book Podzols and Podzolization in Temperate Regions written by D. L. Mokma and published by . This book was released on 1982 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Biology for All written by Navjot S. Sodhi and published by OUP Oxford. This book was released on 2010-01-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conservation Biology for All provides cutting-edge but basic conservation science to a global readership. A series of authoritative chapters have been written by the top names in conservation biology with the principal aim of disseminating cutting-edge conservation knowledge as widely as possible. Important topics such as balancing conversion and human needs, climate change, conservation planning, designing and analyzing conservation research, ecosystem services, endangered species management, extinctions, fire, habitat loss, and invasive species are covered. Numerous textboxes describing additional relevant material or case studies are also included. The global biodiversity crisis is now unstoppable; what can be saved in the developing world will require an educated constituency in both the developing and developed world. Habitat loss is particularly acute in developing countries, which is of special concern because it tends to be these locations where the greatest species diversity and richest centres of endemism are to be found. Sadly, developing world conservation scientists have found it difficult to access an authoritative textbook, which is particularly ironic since it is these countries where the potential benefits of knowledge application are greatest. There is now an urgent need to educate the next generation of scientists in developing countries, so that they are in a better position to protect their natural resources.
Download or read book Micronutrients and the Nutrient Status of Soils written by Mikko Sillanpää and published by Food & Agriculture Org.. This book was released on 1982 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Canadian System of Soil Classification written by Canadian Agricultural Services Coordinating Committee. Soil Classification Working Group and published by NRC Research Press. This book was released on 1998 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This treatise begins with an introduction on the history of soil classification in Canada and discussion of the rationale for soil taxonomy. It then defines such terms as soil, pedon, and soil horizons before outlining the classification system along with identification keys. Chapters 4 through 13 describe the characteristics of the various soil orders and include information on distinguishing soils of one order from soils of other orders. Chapter 14 outlines criteria & guidelines used in differentiating classes in soil families and soil series categories. Chapter 15 provides information on distinguishing soil phases. Chapter 16 correlates Canadian soil taxonomy with other classification systems. Chapter 17 summarizes the main terminology used to describe soils at the landscape and pedon scales. The final chapter provides a system of landform classification for soil mapping.
Download or read book The Land Within written by Pedro García Hierro and published by IWGIA. This book was released on 2005 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: By describing the fabric of relationships indigenous peoples weave with their environment, The Land Within attempts to define a more precise notion of indigenous territoriality. A large part of the work of titling the South American indigenous territories may now be completed but this book aims to demonstrate that, in addition to management, these territories involve many other complex aspects that must not be overlooked if the risk of losing these areas to settlers or extraction companies is to be avoided. Alexandre Surralls holds a doctorate in anthropology from the School for Higher Studies in Social Sciences and is a researcher on the staff of the National Centre for Scientific Research. Pedro Garca Hierro is a lawyer from Madrid Complutense University and the Pontifical Catholic University of Peru. He has worked with various indigenous organizations, on issues related to the identification and development of collective rights and the promotion of intercultural democratic reforms.
Download or read book Ecological Informatics written by Friedrich Recknagel and published by Springer Science & Business Media. This book was released on 2002-12-11 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological Informatics is defined as the design and application of computational techniques for ecological analysis, synthesis, forecasting and management. The book provides an introduction to the scope, concepts and techniques of this newly emerging discipline. It illustrates numerous applications of Ecological Informatics for stream systems, river systems, freshwater lakes and marine systems as well as image recognition at micro and macro scale. Case studies focus on applications of artificial neural networks, genetic algorithms, fuzzy logic and adaptive agents to current ecological management issues such as toxic algal blooms, eutrophication, habitat degradation, conservation of biodiversity and sustainable fishery.
Download or read book Soil and Culture written by Edward R. Landa and published by Springer Science & Business Media. This book was released on 2010-01-28 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: SOIL: beneath our feet / food and fiber / ashes to ashes, dust to dust / dirt!Soil has been called the final frontier of environmental research. The critical role of soil in biogeochemical processes is tied to its properties and place—porous, structured, and spatially variable, it serves as a conduit, buffer, and transformer of water, solutes and gases. Yet what is complex, life-giving, and sacred to some, is ordinary, even ugly, to others. This is the enigma that is soil. Soil and Culture explores the perception of soil in ancient, traditional, and modern societies. It looks at the visual arts (painting, textiles, sculpture, architecture, film, comics and stamps), prose & poetry, religion, philosophy, anthropology, archaeology, wine production, health & diet, and disease & warfare. Soil and Culture explores high culture and popular culture—from the paintings of Hieronymus Bosch to the films of Steve McQueen. It looks at ancient societies and contemporary artists. Contributors from a variety of disciplines delve into the mind of Carl Jung and the bellies of soil eaters, and explore Chinese paintings, African mud cloths, Mayan rituals, Japanese films, French comic strips, and Russian poetry.
Download or read book Plant Physiological Ecology written by Hans Lambers and published by Springer Science & Business Media. This book was released on 2008-10-08 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Box 9E. 1 Continued FIGURE 2. The C–S–R triangle model (Grime 1979). The strategies at the three corners are C, competiti- winning species; S, stress-tolerating s- cies; R,ruderalspecies. Particular species can engage in any mixture of these three primary strategies, and the m- ture is described by their position within the triangle. comment briefly on some other dimensions that Grime’s (1977) triangle (Fig. 2) (see also Sects. 6. 1 are not yet so well understood. and 6. 3 of Chapter 7 on growth and allocation) is a two-dimensional scheme. A C—S axis (Com- tition-winning species to Stress-tolerating spe- Leaf Economics Spectrum cies) reflects adaptation to favorable vs. unfavorable sites for plant growth, and an R- Five traits that are coordinated across species are axis (Ruderal species) reflects adaptation to leaf mass per area (LMA), leaf life-span, leaf N disturbance. concentration, and potential photosynthesis and dark respiration on a mass basis. In the five-trait Trait-Dimensions space,79%ofallvariation worldwideliesalonga single main axis (Fig. 33 of Chapter 2A on photo- A recent trend in plant strategy thinking has synthesis; Wright et al. 2004). Species with low been trait-dimensions, that is, spectra of varia- LMA tend to have short leaf life-spans, high leaf tion with respect to measurable traits. Compared nutrient concentrations, and high potential rates of mass-based photosynthesis. These species with category schemes, such as Raunkiaer’s, trait occur at the ‘‘quick-return’’ end of the leaf e- dimensions have the merit of capturing cont- nomics spectrum.
Download or read book Igap Black water flooded forests of the Amazon Basin written by Randall W. Myster and published by Springer. This book was released on 2018-10-22 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Igapó forests are a common part of the Amazon whose ecosystems are critical to our shared human future. The introduction addresses the structure, function and dynamics of igapó forests in the Amazon basin, focusing on their uniqueness due to their high level of complexity defined as the many ways that different components of igapó forests in the Amazon basin ecosystem interact and also on how those interactions are on a higher-order compared to other tropical forests. The text then breaks down the igapó ecosystem using these sections: (1) Igapó forests over space and time, (2) Water, light and soils, (3) The carbon cycle, (4) Litter, fungi and invertebrates, (5) Vertebrates, (6) Plant population studies, (7) Plant community studies, and (8) Human impacts and management. Experts from around the world serve as chapter authors that review what is known about their specific part of the igapó ecosystem, what research they have done, and also what needs to be done in the future.
Download or read book All Our Relations written by Winona LaDuke and published by Haymarket Books. This book was released on 2017-01-15 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: How Native American history can guide us today: “Presents strong voices of old, old cultures bravely trying to make sense of an Earth in chaos.” —Whole Earth Written by a former Green Party vice-presidential candidate who was once listed among “America’s fifty most promising leaders under forty” by Time magazine, this thoughtful, in-depth account of Native struggles against environmental and cultural degradation features chapters on the Seminoles, the Anishinaabeg, the Innu, the Northern Cheyenne, and the Mohawks, among others. Filled with inspiring testimonies of struggles for survival, each page of this volume speaks forcefully for self-determination and community. “Moving and often beautiful prose.” —Ralph Nader “Thoroughly researched and convincingly written.” —Choice
Download or read book Making the Geologic Now written by Elizabeth Ellsworth and published by . This book was released on 2012-12-01 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Making the Geologic Now announces shifts in cultural sensibilities and practices. It offers early sightings of an increasingly widespread turn toward the geologic as source of explanation, motivation, and inspiration for creative responses to conditions of the present moment. In the spirit of a broadside, this edited collection circulates images and short essays from over 40 artists, designers, architects, scholars, and journalists who are actively exploring and creatively responding to the geologic depth of "now." Contributors' ideas and works are drawn from architecture, design, contemporary philosophy and art. They are offered as test sites for what might become thinkable or possible if humans were to collectively take up the geologic as our instructive co-designer-as a partner in designing thoughts, objects, systems, and experiences. A new cultural sensibility is emerging. As we struggle to understand and meet new material realities of earth and life on earth, it becomes increasingly obvious that the geologic is not just about rocks. We now cohabit with the geologic in unprecedented ways, in teeming assemblages of exchange and interaction among geologic materials and forces and the bio, cosmo, socio, political, legal, economic, strategic, and imaginary. As a reading and viewing experience, Making the Geologic Now is designed to move through culture, sounding an alert from the unfolding edge of the "geologic turn" that is now propagating through contemporary ideas and practices. Contributors include: Matt Baker, Jarrod Beck, Stephen Becker, Brooke Belisle, Jane Bennett, David Benque, Canary Project (Susannah Sayler, Edward Morris), Center for Land Use Interpretation, Brian Davis, Seth Denizen, Anthony Easton, Elizabeth Ellsworth, Valeria Federighi, William L. Fox, David Gersten, Bill Gilbert, Oliver Goodhall, John Gordon, Ilana Halperin, Lisa Hirmer, Rob Holmes, Katie Holten, Jane Hutton, Julia Kagan, Wade Kavanaugh, Oliver Kellhammer, Elizabeth Kolbert, Janike Kampevold Larsen, Jamie Kruse, William Lamson, Tim Maly, Geoff Manaugh, Don McKay, Rachel McRae, Brett Milligan, Christian MilNeil, Laura Moriarity, Stephen Nguyen, Erika Osborne, Trevor Paglen, Anne Reeve, Chris Rose, Victoria Sambunaris, Paul Lloyd Sargent, Antonio Stoppani, Rachel Sussman, Shimpei Takeda, Chris Taylor, Ryan Thompson, Etienne Turpin, Nicola Twilley, Bryan M. Wilson.
Download or read book Agroforestry The Future of Global Land Use written by P.K. Ramachandran Nair and published by Springer Science & Business Media. This book was released on 2012-08-22 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a solid body of the current state of knowledge on the various themes and activities in agroforestry worldwide. It is organized into three sections: the Introduction section consists of the summaries of six keynote speeches at the 2nd World Congress of Agroforestry held in Nairobi, Kenya, in 2009; that is followed by two sections of peer-reviewed thematic chapters grouped as “Global Perspectives” (seven chapters) and “Regional Perspectives” (eleven chapters), authored by professional leaders in their respective agroforestry-related fields worldwide. A total of 130 professionals from institutions in 33 countries in both developing and the industrialized temperate regions of the world contributed to the book as chapter authors and/or reviewers. Thus, the book presents a comprehensive and authoritative account of the global picture of agroforestry today.
