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... Deposition of atmospheric particulates is a major pathway for transporting materials from land to the ocean, with important implications for climate and nutrient cycling in the ocean. Here, we report the results of year-round measurements of particulate organic carbon (POC) and black carbon (BC) in atmospheric aerosols collected on Tuoji Island in the coastal Bohai-Yellow Sea of China (2019–2020) ...
P. H. Templer; J. L. Harrison; F. Pilotto; A. Flores-Díaz; P. Haase; W. H. McDowell; R. Sharif; H. Shibata; D. Blankman; A. Avila; U. Baatar; H. R. Bogena; I. Bourgeois; J. Campbell; T. Dirnböck; W. K. Dodds; M. Hauken; I. Kokorite; K. Lajtha; I.-L. Lai; H. Laudon; T. C. Lin; S. R. M. Lins; H. Meesenburg; P. Pinho; A. Robison; M. Rogora; B. Scheler; P. Schleppi; R. Sommaruga; T. Staszewski; M. Taka
air temperature; ammonium; atmospheric deposition; biogeochemistry; climate; forests; grasslands; nitrates; nitrogen; streams; time series analysis; East Asia; Europe; North America
Abstract:
... Previous studies have evaluated how changes in atmospheric nitrogen (N) inputs and climate affect stream N concentrations and fluxes, but none have synthesized data from sites around the globe. We identified variables controlling stream inorganic N concentrations and fluxes, and how they have changed, by synthesizing 20 time series ranging from 5 to 51 years of data collected from forest and grass ...
aesthetics; air; atmospheric deposition; carbon sequestration; chemical pollutants; climate; climate change; cost effectiveness; ecosystems; environmental impact; green infrastructure; human health; land; lawns and turf; phytoremediation; risk; roads; soil management; soil pollution; soil quality; traffic; urban soils; urbanization; water flow; weather
Abstract:
... Urban areas are facing a range of environmental challenges including air, water and soil pollution as a result of industrial, domestic and traffic emissions. In addition, global climate change is likely to aggravate certain urban problems and disturb the urban ecology by increasing the frequency and severity of extreme weather events. In the context of urbanization growth and the consequent impact ...
... Antibiotic resistance has become a major Global Health concern and a better understanding on the global spread mechanisms of antibiotic resistant bacteria (ARB) and intercontinental ARB exchange is needed. We measured atmospheric depositions of antibiotic resistance genes (ARGs) by quantitative (q)PCR in rain/snow collected fortnightly along 4 y. at a remote high mountain LTER (Long-Term Ecologica ...
Helena Vallicrosa; Jordi Sardans; Joan Maspons; Paolo Zuccarini; Marcos Fernández‐Martínez; Marijn Bauters; Daniel S. Goll; Philippe Ciais; Michael Obersteiner; Ivan A. Janssens; Josep Peñuelas
... Consistent information on the current elemental composition of vegetation at global scale and the variables that determine it is lacking. To fill this gap, we gathered a total of 30 912 georeferenced records on woody plants foliar concentrations of nitrogen (N), phosphorus (P) and potassium (K) from published databases, and produced global maps of foliar N, P and K concentrations for woody plants ...
Pleurozium schreberi; agricultural industry; anthropogenic activities; atmospheric deposition; chemistry; climate; environmental impact; environmental monitoring; heavy metals; mosses and liverworts; multivariate analysis; neutron activation analysis; pollution; summer; Azerbaijan; Caucasus region
Abstract:
... The results of this investigation show that Azerbaijan industries and agricultural sector provide considerable anthropogenic impact on the environment of Caucasus. The use of moss biomonitoring technique and neutron activation analysis (NAA) is a first attempt to study heavy metal atmospheric deposition in Azerbaijan, a country different relief and climate. The study was undertaken in the summer o ...
... Anthropogenic changes to nitrogen cycling have dramatically altered ecosystems across the globe, particularly in coastal estuaries where nitrogen limits primary production. The impacts of nitrogen pollution are especially evident in Narragansett Bay, RI, where eutrophication in the urbanized Providence River Estuary persists despite a > 50% decrease in wastewater nitrogen loading over the past two ...
... Cryoconite holes host active microbial communities despite their extreme physical conditions. In the McMurdo Dry Valleys of Antarctica, these perennially cold, mini-ecosystems form ice lids that can persist for many years thereby isolating the cryoconite from nutrient and carbon inputs. Despite much recent work on cryoconite holes in Antarctica, little is known about nutrient dynamics and limitati ...
Clean Air Act; air; atmospheric deposition; base saturation; climate; climate change; decision making; ecological function; forest ecosystems; forest health; forest soils; hardwood; humans; models; nitrates; nitrogen; soil pollution; sulfur; temperature; understory; vegetation; water; Northeastern United States
Abstract:
... Human activities have dramatically increased nitrogen (N) and sulfur (S) deposition, altering forest ecosystem function and structure. Anticipating how changes in deposition and climate impact forests can inform decisions regarding these environmental stressors. Here, we used a dynamic soil-vegetation model (ForSAFE-Veg) to simulate responses to future scenarios of atmospheric deposition and clima ...
atmospheric deposition; botanical composition; climate; dunes; nestedness; plant nutrition; soil; water table; United Kingdom
Abstract:
... AIM: To quantify the responses of alpha and beta diversity to multivariate gradients, incorporating variation in environmental and management variability in coastal dune slacks. LOCATION: United Kingdom dune slacks. METHODS: Plant community composition, plant nutrient status and soil characteristics were measured for 164 quadrats in 41 dune slacks across 12 coastal sand dune systems. Data were col ...
Audrey Campeau; Karin Eklöf; Anne L. Soerensen; Staffan Åkerblom; Shengliu Yuan; Holger Hintelmann; Magdalena Bieroza; Stephan Köhler; Christian Zdanowicz
... The Arctic environment harbors a complex mosaic of mercury (Hg) and carbon (C) reservoirs, some of which are rapidly destabilizing in response to climate warming. The sources of riverine Hg across the Mackenzie River basin (MRB) are uncertain, which leads to a poor understanding of potential future release. Measurements of dissolved and particulate mercury (DHg, PHg) and carbon (DOC, POC) concentr ...
... Long‐term ecosystem studies are valuable for understanding integrated ecosystem response to global changes in atmospheric deposition and climate. We examined trends for a 35‐year period (1982/83–2017/18) in concentrations of a range of solutes in precipitation and stream water from nine headwater catchments spanning elevation and surficial geology gradients at the Turkey Lakes watershed (TLW) in n ...
... We used a flux deconstruction approach on peat and sediment archives of four bogs and five lakes from two subarctic taiga ecoregions of the Northwest Territories (Canada) to distinguish the atmospheric and catchment-based responses to changing metal pollution emissions over the last 2000 years. Bogs tracked the atmospheric signal, whereas lake sediments provided a mixed atmospheric and catchment-b ...
... Mountains are among the most sensitive ecosystems to climate change, and one of the most evident signs of climate-related effect is the continuous net loss of ice from the cryosphere. Several studies showed that meltwater from glaciated and perennially frozen areas can profoundly affect alpine aquatic ecosystems. Here, we present the impressive temporal increase in solutes in Lake Leit, a mountain ...
... The lateral flux of dissolved organic carbon (DOC) from soils to inland waters and ultimately to the ocean represents a fundamental component of the global carbon cycle. To estimate the DOC flux, we developed an empirical terrestrial-aquatic DOC fluxes model (TAF-DOC). TAF-DOC incorporates various environmental factors (e.g., meteorology, sulfur, and nitrogen deposition) that to-date have not been ...
air temperature; atmospheric deposition; autocorrelation; biosphere; carbon sequestration; climate; dissolved organic carbon; geophysics; land cover; landscapes; nitrogen; observational studies; research; seasonal variation; sulfur; time series analysis; watersheds
Abstract:
... The export of dissolved organic carbon (DOC) from a watershed is a key component of the terrestrial biosphere carbon cycle. There is a need to improve our understanding of how and by how much various environmental factors are driving the temporal patterns of DOC export in order to accurately model and evaluate terrestrial carbon storage and fluxes. In this synthesis, we compiled observational data ...
acidification; atmospheric deposition; climate; color; humans; land use; time series analysis; Northeastern United States
Abstract:
... Multiple studies have reported widespread browning of Northern Hemisphere lakes. Most examples are from boreal lakes that have experienced limited human influence, and browning has alternatively been attributed to changes in atmospheric deposition, climate, and land use. To determine the extent and possible causes of browning across a more geographically diverse region, we examined watercolor and ...
atmospheric deposition; climate; forest ecosystems; forest habitats; forests; lichens; nitrogen; sulfur; Western United States
Abstract:
... Critical loads are thresholds of atmospheric deposition below which harmful ecological effects do not occur. Because lichens are sensitive to atmospheric deposition, lichen-based critical loads can foreshadow changes of other forest processes. Here, we derive critical loads of nitrogen (N) and sulfur (S) deposition for continental US and coastal Alaskan forests, based on nationally consistent lich ...
acidification; air temperature; atmospheric deposition; case studies; chlorides; climate; climate change; community structure; data collection; decline; environment; humans; hydrochemistry; lakes; land use; models; sulfates; surface area; weather; winter; zooplankton; Northeastern United States
Abstract:
... Mountain ponds in the northeastern US have undergone acidification and subsequent recovery due to changes in atmospheric deposition, and also reflect physical and biological responses to climate change. These ponds are distinct from other lakes and ponds in the region as they are higher in elevation, relatively small, and have little direct impact from human land use in their watersheds. They are ...
... In this review, global change processes have been linked to polycyclic aromatic compounds (PACs) in Canada and a first national budget of sources and sinks has been derived. Sources are dominated by wildfire emissions that affect western and northern regions of Canada disproportionately due to the location of Pacific and boreal forests and the direction of prevailing winds. Wildfire emissions are ...