Publications

Martínez-Soto and Johnson 2020 The density of the Atlantic marsh fiddler crab (Minuca pugnax, Smith, 1870) (Decapoda: Brachyura: Ocypodidae) in its expanded range in the Gulf of Maine, USA Journal of Crustacean Biology

For every burrow you count, there is, on average, 0.5 crabs. Wait, how does half a crab make a whole burrow? 

Johnson et al. 2020 A climate migrant escapes its parasites Marine Ecology Progress Series

You can escape your parasites with this one weird trick (psst...it's climate change).

Failon et al. 2020 Ecological associations of Littoraria irrorota with Spartina cynosuroides and Spartina alterniflora Wetlands

If you were a periwinkle, would you live in smooth cordgrass or big cordgrass?

Johnson et al. 2019 The fiddler crab, Minuca pugnax, follows Bergmann’s rule. Ecology and Evolution

My crab is bigger than your crab.

Komatsu et al. 2019 Global-change effects on plant communities are magnified by time and the number of global-change factors imposed PNAS

Global change (e.g., precipitation, nutrients) alter plant communities but don't reduce species diversity.

Staudinger et al. 2019 It’s about time: A synthesis of changing phenology in the Gulf of Maine ecosystem Fisheries Oceanography

What happens to the natural cycles of marine plants and animals as the ocean warms?

Nelson et al. 2018 Feebacks between nutrient enrichment and geomorphology alter bottom-up control on food webs Ecosystems

More fish food leads to more fish right? Not if the fish can't get to it.

Langley et al. 2018 Ambient changes exceed treatment effects on plant species abundance in global change experiments Global Change Biology

A global dataset and 791 plant species. What can that tell us about global change?

Fleeger et al. 2018 What promotes the recovery of saltmarsh infauna after oil spills? Estuaries and Coasts

Read more to find out!

Wigand et al. 2018 Discontinuities in soil strength contribute to destabilization of nutrient‐enriched creeks Ecosphere

Why do salt marshes fall apart when there is nutrient pollution? Because their soils are weaker. 

Johnson et al. 2018 Saltmarsh plants, but not fertilizer, facilitate invertebrate recolonization after an oil spill Ecosphere

Want to recruit more worms to your salt marsh after an oil spill? Plant plants.

Johnson and Heard 2017 Bottom up control of parasites Ecosphere

Zombie amphipods. Need I say more?

Johnson and Williams 2017 Sea level rise may increase extinction risk of a saltmarsh ontogenetic habitat specialist Ecology and Evolution

Can a saltmarsh snail outrun a rising sea?

Johnson et al. 2016 Saltmarsh plant responses to eutrophication. Ecological Applications 26:2649–2661

Fertilizer makes the grass grow, right? Not necessarily in a salt marsh.

Avolio et al. 2015. A framework for quantifying the magnitude and variability of community responses to global change drivers. Ecosphere

 

As global changes create new environmental conditions, how should we assess the impacts on community structure? 

Johnson 2015. The savory swimmer swims north: A northern range extension for the blue crab,Callinectes sapdius? Journal of Crustacean Biology 35:105-110

 

The Maryland blue crab is found as far north as Nova Scotia, Canada, during a time of warming ocean waters.

Johnson 2014. Fiddler on the Roof: A northern range extension for the marsh fiddler crab, Uca pugnax. Journal of Crustacean Biology 34:671-673.

 

The Atlantic fiddler crab, Uca pugnax, expands its range as far north as New Hampshire as a result of climate change. 

Johnson 2014. Making waves about spreading weeds – A response. Science 344:1236

 

I respond to a letter written about my essay below. 

Johnson 2014. Weeds making waves. Essay. Science 344:255

 

An innovative middle school teacher makes a boat out of the invasive reed, Phragmites.

Johnson and Short.  2013.  Chronic nutrient enrichment increases the density and biomass of the eastern mudsnail, Nassarius obsoletus.  Estuaries and Coasts 36: 28-35

 

The densities of the common mudsnail (aka Ilyanassa obsoleta) increase 4-fold after six years of eutrophication.

Pascal et al. 2013. Chronic nutrient-enrichment influence on mudflat food web in a New England (USA) estuary.  Marine Ecology Progress Series.  474:27-41.

 

How does long-term fertilizer additions affect the benthic food-web?

Fagherazzi et al. 2013. Ecogeomorphology of Salt Marshes.  In:  John F. Shroder (ed.) Treatise on Geomorphology, Volume 12: 180-200.

 

An excellent review on salt marsh ecogeomorphology. 

Fagherazzi 2013. Ecogeomorphology of Tidal Flats.  In:  John F. Shroder (ed.) Treatise on Geomorphology, Volume 12: 201-220.

 

An excellent review on tidal flat ecogeomorphology.

Deegan et al. 2012. Coastal nutrient enrichment as a driver of salt marsh loss.  Nature 490: 388-392.

 

After less than a decade of nutrient enrichment, the edge of a salt marsh begins to collapse.

Galván et al. 2011. Natural abundance stable isotopes and dual isotope tracer additions help to resolve resources supporting a saltmarsh food web.  J. of Experimental Marine Biology and Ecology 410: 1-11.

 

If you are an worm, mussel, snail or copepod, and live in a salt marsh, what do you eat?

Johnson 2011.  High-marsh invertebrate communities are susceptible to eutrophication.  Marine Ecology Progress Series 438:143-152.

 

Even though they live above high-mean water, these invertebrates are affected by nutrient pollution. 

Johnson and Fleeger 2009.  The effect of large-scale nutrient enrichment and predator reduction on macroinfauna in a Massachusetts salt marsh.  J. of Experimental Marine Biology and Ecology 373: 35-44.

 

Annelid response to large-scale nutrient enrichment and the removal of the mummichog, Fundulus heteroclitus.

Johnson et al. 2009.  Large-scale manipulations reveal top-down and bottom-up controls interact to alter habitat utilization by saltmarsh fauna. Marine Ecology Progress Series 377: 33-41.

 

Birds and amphipods shift their habitat use with nutrient enrichment and fish-predator removal.

Johnson and Jessen. 2008. Do spur-throated grasshoppers, Melanoplus spp. (Orthoptera: Acrididae), exert top-down control on smooth cordgrass Spartina alterniflora in northern New England? Estuaries and Coasts 31:912-919.

 

Turns out they don't; likely because the grass compensates with increased growth to replace tissue lost to herbivory.

Fleeger et al. 2008. Top-down and bottom-up control of infauna varies across the saltmarsh landscape. Journal of Experimental Marine Biology and Ecology 357:  20-34.

 

The effect of nutrient enrichment and fish-predator removal depends on where you live in the intertidal.

Deegan et al. 2007. Susceptibility of salt marshes to nutrient enrichment and predator removal.  Ecological Applications 17:S42-S63.

 

A review of the early responses to large-scale fertilization and fish reduction. 

Johnson et al. 2007. Worm holes and their space-time continuum: Spatial and temporal variability of macroinfaunal annelids in a northern New England salt marsh. Estuaries and Coasts 30 (2): 226-237.

 

An extensive study of the scale of variation for populations of annelids and their distributions along an elevation gradient. 

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"We have to face the fact that while ecological work is fascinating to do, it is unbearably dull to read about,..."

~Charles Elton, Father of Ecology~

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