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Effects of Nesting Cormorants (Phalacrocorax carbo) on Soil Chemistry, Microbial Communities and Soil Fauna
Springer Science and Business Media LLC - Tập 18 - Trang 643-657 - 2015
Gundula S. Kolb, Cecilia Palmborg, Astrid R. Taylor, Erland Bååth, Peter A. Hambäck
Seabirds act as vectors transporting marine nutrients to land by feeding on fish while nesting and roosting on islands. By depositing large amounts of nutrient-rich guano on their nesting islands they strongly affect island soils, vegetation and consumers. However, few studies have investigated how nesting seabirds affect soil communities. In this study, we investigated how cormorant nesting colo...... hiện toàn bộ
Patterns of Spring/Summer Open-Water Metabolism Across Boreal Lakes
Springer Science and Business Media LLC - - 2020
Matthew J. Bogard, Nicolas F. St-Gelais, Dominic Vachon, Paul A. del Giorgio
Northern regions host the greatest density of surface water globally, but knowledge of lake metabolism in this vast yet remote landscape is limited. Here, we used an oxygen stable isotope approach to quantify patterns and drivers of surface layer metabolism in lakes throughout an approximately 106 km2 tract of boreal Canada. Ecosystem gross primary production (GPP) and respiration rates (R) were m...... hiện toàn bộ
Forest Management Impacts on Greenhouse Gas Fluxes from Riparian Soils Along Headwater Streams
Springer Science and Business Media LLC - Tập 24 - Trang 1810-1822 - 2021
Teresa K. Silverthorn, John S. Richardson
Increasing concentrations of atmospheric greenhouse gases (GHGs; CO2, CH4, N2O) cause climate change. Depending on the conditions, soils have the potential to store carbon or to be a source of GHGs to the atmosphere. Riparian soils in particular have high potential to store carbon, but also to be sources of CH4 and N2O. Headwater streams make up a large proportion of stream length in a drainage ne...... hiện toàn bộ
Tree Diversity, Initial Litter Quality, and Site Conditions Drive Early-Stage Fine-Root Decomposition in European Forests
Springer Science and Business Media LLC - Tập 25 - Trang 1493-1509 - 2021
Janna Wambsganss, Grégoire T. Freschet, Friderike Beyer, Jürgen Bauhus, Michael Scherer-Lorenzen
Decomposition of dead fine roots contributes significantly to nutrient cycling and soil organic matter stabilization. Most knowledge of tree fine-root decomposition stems from studies in monospecific stands or single-species litter, although most forests are mixed. Therefore, we assessed how tree species mixing affects fine-root litter mass loss and which role initial litter quality and environmen...... hiện toàn bộ
Contrasts Among Mycorrhizal Plant Guilds in Foliar Nitrogen Concentration and δ15N Along Productivity Gradients of a Boreal Forest
Springer Science and Business Media LLC - Tập 13 - Trang 108-117 - 2009
J. M. Kranabetter, W. H. MacKenzie
The distribution of plant species in boreal forest understories is hypothesized to reflect mycorrhizal guilds and associated adaptations for organic nitrogen (N) acquisition. In this study of a natural edaphic gradient, where supply rates of inorganic N increase with site productivity, we noted a decline in understory ectomycorrhizal, ericoid, and arbutoid plant communities on productive sites, in...... hiện toàn bộ
The Effect of the Foresummer Drought on Carbon Exchange in Subalpine Meadows
Springer Science and Business Media LLC - Tập 18 - Trang 533-545 - 2015
Lindsey L. Sloat, Amanda N. Henderson, Christine Lamanna, Brian J. Enquist
Climate in subalpine meadows of the Rocky Mountains can be characterized by an early (foresummer) drought that occurs after snowmelt (May) and lasts until the start of the summer monsoon season (July). Climate change models predict an increase in the length and severity of this dry period due to earlier snowmelt dates, rising air temperatures, and shifts in the start and/or intensity of the North ...... hiện toàn bộ
Ectomycorrhizal Networks of Pseudotsuga menziesii var. glauca Trees Facilitate Establishment of Conspecific Seedlings Under Drought
Springer Science and Business Media LLC - Tập 15 - Trang 188-199 - 2011
Marcus A. Bingham, Suzanne Simard
Ectomycorrhizal (EM) networks are hypothesized to facilitate regeneration under abiotic stress. We tested the role of networks in interactions between P. menziesii var. glauca trees and conspecific seedlings along a climatic moisture gradient to: (1) determine the effects of climatic factors on network facilitation of Pseudotsuga menziesii (Mirb.) Franco var. glauca (Mayr) seedling establishment, ...... hiện toàn bộ
Evaluating Drought Impact on Postfire Recovery of Chaparral Across Southern California
Springer Science and Business Media LLC - Tập 24 - Trang 806-824 - 2020
Emanuel A. Storey, Douglas A. Stow, Dar A. Roberts, John F. O’Leary, Frank W. Davis
Chaparral shrubs in southern California may be vulnerable to frequent fire and severe drought. Drought may diminish postfire recovery or worsen impact of short-interval fires. Field-based studies have not shown the extent and magnitude of drought effects on recovery, which may vary among chaparral types and climatic zones. We tracked regional patterns of shrub cover based on June-solstice Landsat ...... hiện toàn bộ
Phosphorus Availability Determines the Response of Tundra Ecosystem Carbon Stocks to Nitrogen Enrichment
Springer Science and Business Media LLC - Tập 21 - Trang 1155-1167 - 2017
Lorna E. Street, Nora Mielke, Sarah J. Woodin
Northern permafrost soils contain important carbon stocks. Here we report the long-term response of carbon stocks in high Arctic dwarf shrub tundra to short-term, low-level nutrient enrichment. Twenty years after experimental nitrogen addition, carbon stocks in vegetation and organic soil had almost halved. In contrast, where phosphorus was added with nitrogen, carbon storage increased by more tha...... hiện toàn bộ
The Influence of Hydrologic Residence Time on Lake Carbon Cycling Dynamics Following Extreme Precipitation Events
Springer Science and Business Media LLC - Tập 20 - Trang 1000-1014 - 2016
Jacob A. Zwart, Stephen D. Sebestyen, Christopher T. Solomon, Stuart E. Jones
The frequency and magnitude of extreme events are expected to increase in the future, yet little is known about effects of such events on ecosystem structure and function. We examined how extreme precipitation events affect exports of terrestrial dissolved organic carbon (t-DOC) from watersheds to lakes as well as in-lake heterotrophy in three north-temperate lakes. Extreme precipitation events in...... hiện toàn bộ
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