Springer Science and Business Media LLC
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
The importance of considering shifts in seasonal changes in discharges when predicting future phosphorus loads in streams
Springer Science and Business Media LLC - Tập 126 - Trang 153-172 - 2015
In this work, we hypothesize that phosphorus (P) concentrations in streams vary seasonally and with streamflow and that it is important to incorporate this variation when predicting changes in P loading associated with climate change. Our study area includes 14 watersheds with a range of land uses throughout the U.S. Great Lakes Basin. We develop annual seasonal load-discharge regression models fo......
Methane flux from Missippi River deltaic plain wetlands
Springer Science and Business Media LLC - Tập 37 - Trang 227-236 - 1997
Methane emissions from three wetland habitats in the MississippiRiver deltaic plain were measured over a three year period. Fluxdata collected indicate that each habitat was a net source of methane to the atmosphere throughout the year. Average emissionfrom a Taxodium distichum / Nyssa aquatica (bald cypress / watertupelo) swamp forest was 146 ± 199 mgCH4 m-2d-1 whileemissions from a Sagittaria la......
The climate benefit of sequestration in soils for warming mitigationAbstract Soils are an enticing reservoir for nature-based climate solutions, but long timescales are required to store amounts of C of relevance to mitigate warming acknowledging its impermanence. Scientific clarity on the controlling factors in soil C persistence should help to disambiguate debates related to permanence in the climate policy domain. However, anothe... ...
Springer Science and Business Media LLC - - 2022
Regional analysis of inorganic nitrogen yield and retention in high-elevation ecosystems of the Sierra Nevada and Rocky Mountains
Springer Science and Business Media LLC - Tập 57 - Trang 341-374 - 2002
Yields and retention of dissolved inorganic nitrogen (DIN: NO3
− + NH4
+) and nitrate concentrations in surface runoff are summarized for 28 high elevation watersheds in the Sierra Nevada of California and Rocky Mountains of Wyoming and Colorado. Catchments ranged in elevation from 2475 to 3603 m and from 15 to 1908 ha in area. Soil cover varied from 5% to nearly 97% of total catchment area. Runof......
Magnitude and variations of groundwater seepage along a Florida marine shoreline
Springer Science and Business Media LLC - Tập 38 - Trang 189-205 - 1997
Direct groundwater inputs are receiving increasingattention as a potential source of nutrients and otherdissolved constituents to the coastal ocean. Seepageinto St. George Sound, Florida was measuredextensively from 1992 to 1994 using seepage meters. Spatial and temporal variations were documented alonga 7-km stretch of coastline and up to 1 km from shore. Measurements were made at 3 transects per......
Decadal cycling within long-lived carbon pools revealed by dual isotopic analysis of mineral-associated soil organic matter
Springer Science and Business Media LLC - Tập 112 - Trang 111-125 - 2011
Long-lived soil organic matter (SOM) pools are critical for the global carbon (C) cycle, but challenges in isolating such pools have inhibited understanding of their dynamics. We physically isolated particulate (>53 μm), silt-, and clay-sized organic matter from soils collected over two decades from a perennial C3 grassland established on long-term agricultural soil with a predominantly C4 isotopi......
Soil respiration and the global carbon cycle
Springer Science and Business Media LLC - Tập 48 - Trang 7-20 - 2000
Soil respiration is the primary path by which CO2fixed by land plants returns to the atmosphere. Estimated at approximately 75 × 1015gC/yr, this large natural flux is likely to increase due changes in the Earth's condition. The objective of this paper is to provide a brief scientific review for policymakers who are concerned that changes in soil respiration may contribute to the rise in CO2in Eart......
An exploration of how litter controls drainage water DIN, DON and DOC dynamics in freely draining acid grassland soils
Springer Science and Business Media LLC - Tập 107 - Trang 165-185 - 2010
Surface and subsurface litter fulfil many functions in the biogeochemical cycling of C and N in terrestrial ecosystems. These were explored using a microcosm study by monitoring dissolved inorganic nitrogen (DIN) (NH4
+–N + NO3
−–N), dissolved organic nitrogen (DON) and dissolved organic carbon (DOC) concentrations and fluxes in drainage water under ......
Spatial variability in nutrient concentration and biofilm nutrient limitation in an urban watershed
Springer Science and Business Media LLC - Tập 106 - Trang 265-280 - 2011
Nutrient enrichment threatens river ecosystem health in urban watersheds, but the influence of urbanization on spatial variation in nutrient concentrations and nutrient limitation of biofilm activity are infrequently measured simultaneously. In summer 2009, we used synoptic sampling to measure spatial patterns of nitrate (NO3
−), ammonium (NH4
+), an......
Nitrogen and phosphorus budgets for a tropical watershed impacted by agricultural land use: Guayas, Ecuador
Springer Science and Business Media LLC - Tập 79 - Trang 135-161 - 2006
Large-scale changes in land use are occurring in many tropical regions, with significant impacts on nitrogen and phosphorus biogeochemistry. In this study we examine the relationships between land use, anthropogenic nutrient inputs, and riverine nutrient exports in a major agricultural watershed of the Pacific coast of South America, the Guayas River basin of Ecuador. We present comprehensive nutr......
Tổng số: 2,355
- 1
- 2
- 3
- 4
- 5
- 6
- 10