Jacob Allgeier

About Jacob Allgeier

I am an ecologist with broad interests in how human-induced changes alter how ecosystems function and the services that they provide. A central focus of my research is understanding how changes in biodiversity affect the flow of nutrients and energy in ecosystems. Most of this research takes place in tropical coastal ecosystems such as mangroves, seagrass beds, and coral reefs. I am an assistant professor at the University of Michigan, Ecology and Evolutionary Biology.

Cuttlefish hide from sharks by not breathing

It has long been known that cuttlefish hold their breath when threatened by a predator like a shark.  But only recently did researchers learn that when cuttlefish stop water flow over their gills (breathing) they decrease electrical activity that can betray their presence to foraging sharks.  Notice the cuttlefish in the photo has its tentacles clasp together – this is what they […]

By | 2015-12-06T22:09:39-05:00 December 6th, 2015|Categories: Uncategorized|1 Comment

Chitons have eyes

I never would have thought it, but chitons have eyes.  If you walk at low tide on any rocky shore in the Caribbean or in most oceans for that matter, you will see these little guys attached to rocks.  They feed, by scraping algae off the rocks, when fully submerged during high tide.  Their eyes help them avoit predation.  This short film explains their […]

By | 2015-12-03T12:59:30-05:00 December 3rd, 2015|Categories: Uncategorized|0 Comments

Restoring reefs with the help of fish

A recent study has shown that fish can assist in coral nurseries and transplantation processes by eating the algae and invertebrates that threaten to smother and kill the young polyps.

This make a lot of sense given that coral and fishes have evolved complex relationships over time, many of which are mutually beneficial.  It is exciting to see researcher […]

By | 2015-11-07T15:39:18-05:00 November 7th, 2015|Categories: Uncategorized|0 Comments

The emergence of “The Blob”

“The Blob” is a peculiar and persistent warm-water mass that has been hovering over the Northern Pacific on and off for the past few years.  Scientist don’t full understand how or why it is there, but it is having marked effects on both weather patterns (largely in the Pacific Northwest) and on local ecosystems.  In particular, the warm water prevents […]

By | 2015-04-05T17:39:40-05:00 April 5th, 2015|Categories: Climate Change, Current Events, Global change|0 Comments

Third mass coral bleaching event?

The first recorded mass coral bleaching even occurred in 1998 when global ocean temperatures soared to record highs due to an abnormally strong El Nino event. The second global-scale bleaching occurred in 2010, in the wake of another El Nino. Though 2015 is not predicted to have a strong El Nino signal, some scientist still believe a third mass bleaching […]

By | 2015-01-24T16:21:29-05:00 January 24th, 2015|Categories: Uncategorized|0 Comments

One Trillion Expected in Damage to Coasts by 2100

A recent article in Climactic Change reported an economic analysis that suggests that climate change will cost the US twice as much as previous analyses estimated – increasing the estimate from $500 million to $1 trillion. Just to reiterate, that is 1,000,000,000,000 – lots of zeros. While there are always myriad considerations when attempting to predict such outcomes, this […]

By | 2015-01-15T15:14:19-05:00 January 15th, 2015|Categories: Beaches, Climate Change, Current Events, Global change, Policy|0 Comments