Foad Yousef
Michigan Technological University
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Publication
Featured researches published by Foad Yousef.
Journal of Great Lakes Research | 2010
W. Charles Kerfoot; Foad Yousef; Sarah A. Green; Judith Wells Budd; David J. Schwab; Henry A. Vanderploeg
ABSTRACT Between 1990 and 2001, late-winter phytoplankton blooms were common in parts of the lower Great Lakes (southern Lake Michigan, Saginaw Bay and southern Lake Huron, and western Lake Erie), providing resources for over-wintering Zooplankton. In Lake Michigan up to 2001, detailed remote sensing and ship studies documented well-developed late-winter blooms in the southern gyre (circular bloom termed the ‘doughnut’). However, from 2001 to 2008, the winter blooms in Lake Michigan also supported early season veliger larvae from the introduced, cold-water adapted “profunda” morph of quagga mussels (Dreissena rostriformis bugensis). Remote sensing and ship studies revealed that settled mussels caused an extraordinary increase in water transparency and a simultaneous decrease of Chl a in the late-winter bloom. Before quagga mussels in 2001, water transparency was 74–85% at deep-water sites, whereas it increased progressively to 89% by 2006 and 94–96% by 2008. Chlorophyll a concentrations in the gyre rings were 1.1–2.6 µg/L in 2001, declining to 0.5–1.7 µg/L by 2006 and 0.4–1.5 µg/L by 2008. The reduction of Chl a in the winter bloom rings from 2001 to 2008 was 56–78% for the western limb and 74–75% for the eastern limb. Zooplankton species abundance, composition and abundance also changed, as cyclopoid copepods became very scarce and overwintering omnivorous calanoid copepods declined. Reduction in late-winter phytoplankton and Zooplankton poses a serious threat to open-water food webs.
ISPRS international journal of geo-information | 2014
W. Charles Kerfoot; Martin M. Hobmeier; Foad Yousef; Sarah A. Green; Robert Regis; Colin Brooks; Robert A. Shuchman; Jamey Anderson; Molly Reif
There are numerous examples of past and present mine disposal into freshwater and marine coastal bays and riverine environments. Due to its high spatial resolution and extended water penetration, coastal light detection and ranging (LiDAR), coupled with multispectral scanning (MSS), has great promise for resolving disturbed shoreline features in low turbidity environments. Migrating mine tailings present serious issues for Lake Superior and coastal marine environments. Previous investigations in Lake Superior uncovered a metal-rich “halo” around the Keweenaw Peninsula, related to past copper mining practices. For over a century, waste rock migrating from shoreline tailing piles has moved along extensive stretches of coastline, compromising critical fish breeding grounds, damming stream outlets, transgressing into wetlands and along recreational beaches and suppressing benthic invertebrate communities. In Grand (Big) Traverse Bay, Buffalo Reef is an important spawning area for lake trout and whitefish threatened by drifting tailings. The movement of tailings into Buffalo Reef cobble fields may interfere with the hatching of fish eggs and fry survival, either by filling in crevices where eggs are deposited or by toxic effects on eggs, newly hatched larvae or benthic communities. Here, we show that the coastal tailing migration is not “out of sight, out of mind”, but clearly revealed by using a combination of LiDAR and MSS techniques.
Biological Invasions | 2011
W. Charles Kerfoot; Foad Yousef; Martin M. Hobmeier; Ryan P. Maki; S. Taylor Jarnagin; James H. Churchill
Freshwater Biology | 2015
Mark D. Rowe; Daniel R. Obenour; Thomas F. Nalepa; Henry A. Vanderploeg; Foad Yousef; W. Charles Kerfoot
Journal of Great Lakes Research | 2014
Foad Yousef; W. Charles Kerfoot; Robert A. Shuchman; Gary L. Fahnenstiel
Biological Invasions | 2016
W. Charles Kerfoot; Martin M. Hobmeier; Foad Yousef; Brenda Moraska Lafrancois; Ryan P. Maki; Jodi K. Hirsch
Limnology and Oceanography | 2012
W. Charles Kerfoot; Foad Yousef; Sarah A. Green; Robert Regis; Robert A. Shuchman; Colin Brooks; Michael J. Sayers; Bruce M. Sabol; Mark Graves
Journal of Great Lakes Research | 2013
Foad Yousef; W. Charles Kerfoot; Colin Brooks; Robert A. Shuchman; Bruce M. Sabol; Mark Graves
Archive | 2015
Gary L. Fahnenstiel; Michael J. Sayers; Robert A. Shuchman; Steven A. Pothoven; Foad Yousef
Archive | 2014
Foad Yousef; Robert A. Shuchman; Gary L. Fahnenstiel; Michael J. Sayers