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Peggy H. Ostrom
Michigan State University
97Publications
33H-index
2,915Citations
Publications 97
Newest
#1Anne E. Wiley (University of Akron)H-Index: 7
#2Sam Rossman (MSU: Michigan State University)H-Index: 7
Last.Helen F. James (National Museum of Natural History)H-Index: 28
view all 8 authors...
Quantifying individual specialization and other forms of intraspecific ecological diversity can reveal variation that is critical for evolutionary or behavioral adaption of a species to changing environments. Here, the isotopic niche and degree of individual foraging specialization were quantified for an endangered seabird, the Hawaiian petrel (Pterodroma sandwichensis), nesting on Lānaʻi (20°48′N, 156°52′W) and 72 km away on Haleakalā, Maui (20°42′N, 156°15′W; 20° 43′N, 156°14′W) between 2006 a...
#1Kaycee E. Morra (MSU: Michigan State University)H-Index: 1
#2Yoshito Chikaraishi (Hokkaido University)H-Index: 30
Last.Peggy H. Ostrom (MSU: Michigan State University)H-Index: 33
view all 9 authors...
We investigated how foraging habits vary among three ecologically distinct wide-ranging seabirds. Using amino acid δ15N proxies for nutrient regime (δ15NPhe) and trophic position (Δδ15NGlu-Phe), we compared Newell’s shearwater (Puffinus newelli) and Laysan albatross (Phoebastria immutabilis) foraging habits over the past 50–100 years, respectively, to published records for the Hawaiian petrel (Pterodroma sandwichensis). Standard ellipses constructed from the isotope proxies show that inter-popul...
#1Kaycee E. Morra (MSU: Michigan State University)H-Index: 1
#2Anne E. Wiley (University of Akron)H-Index: 7
Last.Peggy H. Ostrom (MSU: Michigan State University)H-Index: 33
view all 5 authors...
Abstract. Isotope data from Hawaiian Petrel (Pterodroma sandwichensis) primaries P1 and P6 were compared to determine whether foraging habits change between the beginning and middle of the nonbreeding season. P6 data did not differ between samples derived from a longitudinal and a minimally invasive protocol and point samples taken from the feather bases. While P6 δ13C increased longitudinally, no δ15N longitudinal trends emerged, yet inter-individual δ15N variability was high. P6 δ13C data sugg...
#1Joshua A. Haslun (MSU: Michigan State University)H-Index: 4
#2Nathaniel E. Ostrom (MSU: Michigan State University)H-Index: 29
Last.Peggy H. Ostrom (MSU: Michigan State University)H-Index: 33
view all 4 authors...
Soil microbial processes, stimulated by agricultural fertilization, account for 90 % of anthropogenic nitrous oxide (N 2 O), the leading source of ozone depletion and a potent greenhouse gas. Efforts to reduce N 2 O flux commonly focus on reducing fertilization rates. Management of microbial processes responsible for N 2 O production may also be used to reduce N 2 O emissions, but this requires knowledge of the prevailing process. To this end, stable isotopes of N 2 O have been applied to differ...
#1Robert W. Sterner (UMN: University of Minnesota)H-Index: 48
#2Peggy H. OstromH-Index: 33
Last.Aaron T. FiskH-Index: 1
view all 8 authors...
The Laurentian Great Lakes (LGL) constitute one of the largest freshwater systems in the world while providing social and economic value to two powerful nations. The spatial scale of these inland seas falls between two endpoints: small lakes and oceans. Lacustrine in many characteristics, the LGL often require a scientific approach with attributes similar to those of oceanography. There is a strong sense that within the LGL support for scientific research has not kept pace with the need for proc...
#1Peggy H. Ostrom (MSU: Michigan State University)H-Index: 33
#2Anne E. Wiley (University of Akron)H-Index: 7
Last.Yoshito Chikaraishi (Hokkaido University)H-Index: 30
view all 7 authors...
Human-induced ecological change in the open oceans appears to be accelerating. Fisheries, climate change and elevated nutrient inputs are variously blamed, at least in part, for altering oceanic ecosystems. Yet it is challenging to assess the extent of anthropogenic change in the open oceans, where historical records of ecological conditions are sparse, and the geographical scale is immense. We developed millennial-scale amino acid nitrogen isotope records preserved in ancient animal remains to ...
#1Briana Hauff Salas (University of Texas Health Science Center at San Antonio)H-Index: 1
#2Joshua A. Haslun (MSU: Michigan State University)H-Index: 4
Last.James M. Cervino (WHOI: Woods Hole Oceanographic Institution)H-Index: 2
view all 5 authors...
Scleractinian coral are experiencing unprecedented rates of mortality due to increases in sea surface temperatures in response to global climate change. Some coral species however, survive high temperature events due to a reduced susceptibility to bleaching. We investigated the relationship between bleaching susceptibility and expression of five metabolically related genes of Symbiodinium spp. from the coral Porites astreoides originating from an inshore and offshore reef in the Florida Keys. Th...
#1Nathaniel E. Ostrom (MSU: Michigan State University)H-Index: 29
#2Peggy H. Ostrom (MSU: Michigan State University)H-Index: 33
Nitrous oxide (N2O) is an important focus of international greenhouse gas accounting agreements and mitigation of emissions will likely depend on understanding the mechanisms of its formation and reduction. Consequently, applications of stable isotope techniques to understand N2O cycling are proliferating and recent advances in technology are enabling (1) increases in the frequency of isotope analyses and (2) analyses not previously possible. The two isotopes of N and 3 isotopes of O combine to ...
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