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.

Fishing reduces fish pee on coral reefs

Yup, more about fish pee.  As a follow-up to work we have been conducting on the importance of fish excretion (pee) for coastal tropic ecosystems, we describe in a recent study how fishing pressure is reducing this source of nutrients by nearly half on coral reefs across the broader Caribbean. This study highlights an alternative way in which human […]

By | 2017-12-01T14:01:52-04:00 August 16th, 2016|Categories: Coral, Current Events, Global change, marine protected areas, Nutrients, Overfishing|0 Comments

Greenland shark is longest living vertebtrate

A recent study showed that the greenland shark, an animal that scientists had previously suspected was long-lived, can reach ages of nearly 400 years.  Previous research in the 1930s had shown that these fish, which can grow up to 5 meters in length, only grow about 1 centimeter per year.  This is a surprisingly slow growth rate, even for the extreme […]

By | 2017-12-01T14:01:52-04:00 August 16th, 2016|Categories: Uncategorized|1 Comment

Letting the birds do the work

Weather has always been hard to predict.  One of the difficulties is developing enough weather stations throughout the world to compile the data needed for accurate predictions.  Well, now scientists are starting to learn from the worlds expert travelers: birds.  In a recent study, scientists placed small GPS trackers on these long-ranged fliers allowing them to accurately calculate wind speeds wherever […]

By | 2016-08-02T17:15:31-04:00 August 1st, 2016|Categories: Uncategorized|1 Comment

World squid and octopus populations on a rise

Finally some good news.  With all the drastic changes that are occurring in the worlds oceans, there are clear winners and losers.  A recent article has provided definitive proof that all cephalopods, a group that includes octopus, squid, and cuttlefish, are clear winners. Researchers concluded that cephalopods from New England to Japan have boomed since the 1950s.  What is interesting […]

By | 2016-07-29T18:38:02-04:00 July 29th, 2016|Categories: Climate Change, Current Events, Food, Global change, Overfishing|0 Comments

Lessons from the International Coral Reef Symposium: “We Must Reduce Carbon Emissions”

Last week some 3000 coral reef scientists, including the world’s foremost leaders in all aspects of coral reef ecosystems, met in Honolulu to discuss the fate of coral reefs.  The goal of this convention, which is held every four years, was to focus on positive action towards improving reef ecosystems. Unfortunately, when studying coral reefs it is difficult to be optimistic. […]

New Reefs Are Born: ampil pipi poisson

As an extension of our on-going research in Haiti, we recently kicked off a new artificial reef project.  Working with local fishers, we have constructed two clusters of artificial reefs, one of which the locals will actively use for harvesting fishes and the other that they will collectively protect from fishing. Building on what we have learned from other projects, we have chosen to […]

By | 2016-07-24T17:05:53-04:00 June 18th, 2016|Categories: Artificial Reefs, Education, Featured, Fish, Haiti, Overfishing, seagrass|1 Comment

Headed back to Haiti Cheri!

We are gearing up for our fourth field season in Haiti, on the sleepy but beautiful little island of Ile A Vache (island of the cow).  This year we are working with two different small fishing communities to build a series of artificial reefs, some of which the communities will fish, and some of which they will protect from fishing.  We […]

By | 2017-12-01T14:01:55-04:00 April 14th, 2016|Categories: Artificial Reefs, Current Events, Education, Haiti, Overfishing|0 Comments

2015 El Niño brings longest coral bleaching event ever

This years exceptionally strong El Niño event, and the abnormally high water temperatures that it has produced, has triggered what appears to be the largest coral bleaching event ever.  Widespread bleaching is currently underway throughout the Pacific and is expected to continue for months to come.  Researchers have already documented over 99% of the reefs (4 out of the 520 surveyed) in […]

By | 2016-04-10T17:49:27-04:00 April 10th, 2016|Categories: Uncategorized|0 Comments

Gardening coral of our own

We have been talking a lot about the importance of fish pee for tropical coastal ecosystems over the past few years.  Most of this research has focused on the importance of fish pee for seagrasses and algae.  We are now extending these efforts to understand its importance for coral growth and development.

A recent study of ours provides compelling evidence […]

By | 2016-03-07T15:31:50-04:00 March 7th, 2016|Categories: Coral, Current Events, Fish, Nutrients, pollution|2 Comments

The oldest sponge

The recently discovered, millimeter-long fossilized sponge (pictured here) has helped scientists identify when the sponge lineage diverged from that of more familiar animals.  This sponge lived 600 million years ago, tens of millions of years before sponges were thought to have first appeared in the historical record.

By | 2015-12-28T10:49:41-04:00 December 28th, 2015|Categories: Archaeology, Current Events|0 Comments