Mummichog Fundulus heteroclitus responses to long-term, whole-ecosystem nutrient enrichment
Lockfield, Konner C.
Fleeger, John W.
Deegan, Linda A.
MetadataShow full item record
KeywordFundulus heteroclitus; Mark and recapture; Eutrophication; Decimal coded-wire tags; Growth rate; Salt marsh
The effects of eutrophication on coastal plants and sessile animals are becoming well known, but responses of mobile species are less well studied. Here, we link variation in abundance, biomass, body size, growth rate, and resource utilization in mummichogs (Fundulus heteroclitus) > 40 mm in length to experimental nutrient enrichment in Plum Island Sound, Massachusetts, USA. To mimic cultural eutrophication, dissolved fertilizer was released into replicate saltmarsh creeks on each rising tide throughout entire growing seasons. In the summer of the 6th year of enrichment, we released coded-wire tagged mummichogs into nutrient-enriched (n = 3733 fish) and reference (n = 3894 fish) creeks and recaptured them over the next two months. We found increased abundance (by 37%), biomass (58%), body size (8%), and herbivory (115%, measured as photosynthetic gut pigment content) in nutrient-enriched creeks, although body condition was unaffected. However, individual growth rates were 43% lower in nutrient-enriched creeks. Nutrient enrichment stimulated primary production causing a bottom-up enrichment of the food web, which fostered increased biomass and body size. However, the reduction in growth rate indicates an adverse consequence of long-term nutrient enrichment. This negative effect occurred in the absence of increased hypoxia in these highly tidally (4-m amplitude) flushed study creeks. The mummichog is an important predator/grazer in salt marshes, and nutrient-induced alterations in biomass or resource utilization will directly or indirectly affect lower trophic levels, including benthic algae, thereby impacting the 63 ecosystem-wide response to eutrophication.
Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 492 (2013): 211-222, doi:10.3354/meps10495.
Suggested CitationPreprint: Lockfield, Konner C., Fleeger, John W., Deegan, Linda A., "Mummichog Fundulus heteroclitus responses to long-term, whole-ecosystem nutrient enrichment", 2013-05, https://doi.org/10.3354/meps10495, https://hdl.handle.net/1912/6345
Showing items related by title, author, creator and subject.
Development and characterization of polyclonal antibodies against the aryl hydrocarbon receptor protein family (AHR1, AHR2, and AHR repressor) of Atlantic killifish Fundulus heteroclitus Merson, Rebeka R.; Franks, Diana G.; Karchner, Sibel I.; Hahn, Mark E. (2005-12-20)The aryl hydrocarbon receptor (AHR) and AHR repressor (AHRR) proteins regulate gene expression in response to some halogenated aromatic hydrocarbons and polycyclic aromatic hydrocarbons. The Atlantic killifish is a valuable ...
New cytochrome P450 1B1, 1C2 and 1D1 genes in the killifish Fundulus heteroclitus : Basal expression and response of five killifish CYP1s to the AHR agonist PCB126 Zanette, Juliano; Jenny, Matthew J.; Goldstone, Jared V.; Woodin, Bruce R.; Watka, Lauren A.; Bainy, Afonso C. D.; Stegeman, John J. (2009-04-30)Knowledge of the complement of cytochrome P450 (CYP) genes is essential to understanding detoxification and bioactivation mechanisms for organic contaminants.We cloned three new CYP1 genes, CYP1B1, CYP1C2 and CYP1D1, ...
Can diversifying selection be distinguished from history in geographic clines? A population genomic study of killifish (Fundulus heteroclitus) Strand, Allan E.; Williams, Larissa M.; Oleksiak, Marjorie F.; Sotka, Erik E. (Public Library of Science, 2012-09-26)A common geographical pattern of genetic variation is the one-dimensional cline. Clines may be maintained by diversifying selection across a geographical gradient but can also reflect historical processes such as allopatry ...