ORCID Profile
0000-0002-1004-5048
Current Organisation
University of South Carolina
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 08-2006
Publisher: Elsevier BV
Date: 05-2008
Publisher: Elsevier BV
Date: 08-2006
Publisher: Wiley
Date: 10-2013
Publisher: Elsevier BV
Date: 02-2013
Publisher: Elsevier BV
Date: 03-2012
Publisher: Annual Reviews
Date: 2009
DOI: 10.1146/ANNUREV.MARINE.010908.163727
Abstract: Atmospheric inputs of iron to the open ocean are hypothesized to modulate ocean biogeochemistry. This review presents an integration of available observations of atmospheric iron and iron deposition, and also covers bioavailable iron distributions. Methods for estimating temporal variability in ocean deposition over the recent past are reviewed. Desert dust iron is estimated to represent 95% of the global atmospheric iron cycle, and combustion sources of iron are responsible for the remaining 5%. Humans may be significantly perturbing desert dust (up to 50%). The sources of bioavailable iron are less well understood than those of iron, partly because we do not know what speciation of the iron is bioavailable. Bioavailable iron can derive from atmospheric processing of relatively insoluble desert dust iron or from direct emissions of soluble iron from combustion sources. These results imply that humans could be substantially impacting iron and bioavailable iron deposition to ocean regions, but there are large uncertainties in our understanding.
Publisher: American Geophysical Union (AGU)
Date: 12-2008
DOI: 10.1029/2008GB003240
Publisher: Wiley
Date: 11-03-2020
DOI: 10.1002/ESP.4840
Abstract: Dust plays a globally important role in supplying biologically essential elements to landscapes underlain by nutrient‐poor substrates. Here we show that dust may play a significant role in sustaining productivity in the vast wetlands of the Okavango Delta in southern Africa, one of the world's richest bio ersity hotspots. Dust accumulates preferentially on tree‐covered islands in the seasonal sw s of the Delta, creating pockets of fine‐grained, nutrient‐rich material within the semi‐arid landscape of the Kalahari Desert. Strontium and neodymium isotopes reveal that this dust likely originates predominantly from the Makgadikgadi salt pans, located 300 km away, and contributes 10–80% of the fine‐grained material present in Okavango island soils. Surface material sourced from the Makgadikgadi Pans contains relatively high amounts of bioavailable phosphorus and iron, potentially influencing Okavango Delta biological productivity. We propose that long‐term ecosystem productivity and nutrient availability in the Okavango may be strongly mediated by regional dust inputs. Understanding the influence of dust deposition on nutrient loads and biogeochemical cycling is thus critical for predicting the response of the Okavango Delta to future changes in climate. We suggest that dust inputs may play a significant role in the supply of nutrients to other large, global wetland systems located in dryland environments. © 2020 John Wiley & Sons, Ltd
Publisher: American Geophysical Union (AGU)
Date: 08-2015
DOI: 10.1002/2015GB005134
Publisher: Wiley
Date: 09-2012
Location: United States of America
No related grants have been discovered for Claudia Benitez-Nelson.