James W. Ammerman

4.8k citations

34 papers · 2.9k indexed · 1 hit paper · h-index 23

Co-authors: Farooq Azam Marta Sebastián Sonya T. Dyhrman Jason B. Sylvan Richard A. Jahnke Benjamin Van Mooy Jed A. Fuhrman James B. Cotner
Topics: Marine and coastal ecosystems (20 papers)Aquatic Ecosystems and Phytoplankton Dynamics (11 papers)Microbial Community Ecology and Physiology (10 papers)
Cited by: Oceanography Environmental Chemistry Ecology
Journals: Science Environmental Science & Technology Applied and Environmental Microbiology
Partner nations: United States Netherlands Bermuda

In The Last Decade

James W. Ammerman

34 papers receiving 2.8k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

The fate of nitrogen and phosphorus at the land-sea margin of the North Atlantic Ocean

1996 555 citations James W. Ammerman et al. profile →

Peers

Countries citing papers authored by James W. Ammerman

Since Specialization

Citations

This map shows the geographic impact of James W. Ammerman's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by James W. Ammerman with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites James W. Ammerman more than expected).

Fields of papers citing papers by James W. Ammerman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James W. Ammerman. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by James W. Ammerman. The network helps show where James W. Ammerman may publish in the future.

Co-authorship network of co-authors of James W. Ammerman

This figure shows the co-authorship network connecting the top 25 collaborators of James W. Ammerman. A scholar is included among the top collaborators of James W. Ammerman based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with James W. Ammerman. James W. Ammerman is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound 2023 ·Estuaries and Coasts ·(unknown),James D. Hagy,James W. Ammerman,Mark A. Tedesco	5
2	Molecular Response of the Bloom-Forming Cyanobacterium, Microcystis aeruginosa, to Phosphorus Limitation 2011 ·Microbial Ecology ·Matthew J. Harke,Dianna L. Berry,James W. Ammerman,Christopher J. Gobler	106
3	Role of the phosphatase PhoX in the phosphorus metabolism of the marine bacterium Ruegeria pomeroyi DSS‐3 2011 ·Environmental Microbiology Reports ·Marta Sebastián,James W. Ammerman	37
4	Going West: Nutrient Limitation of Primary Production in the Northern Gulf of Mexico and the Importance of the Atchafalaya River 2011 ·Aquatic Geochemistry ·Antonietta Quigg,Jason B. Sylvan,Anne B. Gustafson,Thomas Fisher,Rod L. Oliver,Sasha Tozzi,James W. Ammerman	64
5	Mapping Phytoplankton Community Physiology on a River Impacted Continental Shelf: Testing a Multifaceted Approach 2011 ·Estuaries and Coasts ·Jason B. Sylvan,Antonietta Quigg,Sasha Tozzi,James W. Ammerman	13
6	Dissolved inorganic and organic phosphorus uptake in Trichodesmium and the microbial community: The importance of phosphorus ester in the Sargasso Sea 2010 ·Limnology and Oceanography ·Elizabeth D. Orchard,James W. Ammerman,Michael W. Lomas,Sonya T. Dyhrman	73
7	The alkaline phosphatase PhoX is more widely distributed in marine bacteria than the classical PhoA 2009 ·The ISME Journal ·Marta Sebastián,James W. Ammerman	181
8	Enzymatic assay of marine bacterial phosphatases by capillary electrophoresis with laser‐induced fluorescence detection 2008 ·Electrophoresis ·(unknown),Marta Sebastián,James W. Ammerman,Christa L. Colyer	9
9	Eutrophication‐induced phosphorus limitation in the Mississippi River plume: Evidence from fast repetition rate fluorometry 2007 ·Limnology and Oceanography ·Jason B. Sylvan,Antonietta Quigg,Sasha Tozzi,James W. Ammerman	61
10	A review of water column processes influencing hypoxia in the northern Gulf of Mexico 2007 ·Estuaries and Coasts ·M. Dagg,James W. Ammerman,Rainer M. W. Amon,Wayne S. Gardner,R. Green,Steven E. Lohrenz	95
11	Phosphorus Limits Phytoplankton Growth on the Louisiana Shelf During the Period of Hypoxia Formation 2006 ·Environmental Science & Technology ·Jason B. Sylvan,Quay Dortch,David M. Nelson,(unknown),Wendy Morrison,James W. Ammerman	175
12	Phosphorus Limitation of Phytoplankton Growth in the Mississippi River Plume: A Case for Dual Nutrient Control? 2004 ·AGUFM ·James W. Ammerman,Jason B. Sylvan	2
13	Microbial Metabolism and Nutrient Cycling in the Mississippi and Atchafalaya River Plumes 2000 ·Estuarine Coastal and Shelf Science ·J. Dean Pakulski,Ronald Benner,Terry E. Whitledge,Rainer M. W. Amon,B.J. Eadie,Luis A. Cifuentes,James W. Ammerman,Dean A. Stockwell	84
14	Sulfur Cycling in the Terrestrial Subsurface: Commensal Interactions, Spatial Scales, and Microbial Heterogeneity 1998 ·Microbial Ecology ·Glenn A. Ulrich,Diego Martino,(unknown),Joyanto Routh,Ethan L. Grossman,James W. Ammerman,Joseph M. Suflita	52
15	Microbial Abundance and Activity in a Low-Conductivity Aquifer System in East-Central Texas 1998 ·Microbial Ecology ·Diego Martino,Ethan L. Grossman,Glenn A. Ulrich,(unknown),(unknown),Joseph M. Suflita,James W. Ammerman	29
16	Pyrococcus horikoshii sp. nov., a hyperthermophilic archaeon isolated from a hydrothermal vent at the Okinawa Trough 1998 ·Extremophiles ·Juan Miguel González Grau,Y. Masuchi,Frank T. Robb,James W. Ammerman,Dennis Maeder,(unknown),Jin Támaoka,Chiaki Kato	191
17	Antarctic microbiology (E. I.Friedmann [ed.]) 1996 ·Limnology and Oceanography ·James W. Ammerman	9
18	Bacterial 5′‐nucleotidase activity in estuarineand coastal marine waters: Role in phosphorus regeneration 1991 ·Limnology and Oceanography ·James W. Ammerman,Farooq Azam	36
19	Bacterial 5-Nucleotidase in Aquatic Ecosystems: A Novel Mechanism of Phosphorus Regeneration 1985 ·Science ·James W. Ammerman,Farooq Azam	164
20	Uptake of Cyclic AMP by Natural Populations of Marine Bacteria 1982 ·Applied and Environmental Microbiology ·James W. Ammerman,Farooq Azam	18

About James W. Ammerman

James W. Ammerman is a scholar working on Oceanography, Environmental Chemistry and Ecology, having authored 34 papers that have together received 2.9k indexed citations. Recurring topics across this work include Marine and coastal ecosystems (20 papers), Aquatic Ecosystems and Phytoplankton Dynamics (11 papers) and Microbial Community Ecology and Physiology (10 papers). The work is most often cited by research in Oceanography (1.8k citations), Environmental Chemistry (1.0k citations) and Ecology (1.3k citations). James W. Ammerman has collaborated with scholars based in United States, Netherlands and Bermuda. Frequent co-authors include Farooq Azam, Marta Sebastián, Sonya T. Dyhrman, Jason B. Sylvan, Richard A. Jahnke, Benjamin Van Mooy, Farooq Azam, Jed A. Fuhrman, James B. Cotner and Raleigh R. Hood. Their work appears in journals such as Science, Environmental Science & Technology and Applied and Environmental Microbiology.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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