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Thursday, November 21, 2019

All day
Project Owlnet

Project Owlnet

Friday, October 25, 2019 - Tuesday, November 26, 2019 6:30pm - 12:15am
Event Location
Reed Education Center

The Smithsonian Environmental Research Center is hosting a Project Owlnet site, part of a network of sites scattered throughout the US and Canada that track the migration and population changes of Northern Saw-whet Owls.

Advance Registration Required
Yes

Event Details

The Smithsonian Environmental Research Center is hosting a Project Owlnet site, part of a network of sites scattered throughout the US and Canada that track the migration and population changes of Northern Saw-whet Owls.

This is a VERY popular project. Please sign up for a MAXIMUM of 3 nights! We want to be able to offer the opportunity to as many people as possible.

Volunteers will assist with banding and measuring the owls. Volunteers will work from after sunset until approximately midnight. Volunteers ages 12+ are welcome (volunteers under the age of 16 must be accompanied by a participating adult). We can accommodate a maximum of 3 volunteers under the age of 16 per night. Please do not bring anyone with you that you don't include in the count for your party! Space is limited, so we are unable to accommodate extra people.

We prefer volunteers who can stay the whole time (until midnight). We may be able to accommodate volunteers who need to leave early. These decisions will be made on a case-by-case basis. Please contact me if you have any questions. As a note, the number of owls tends to increase throughout the evening, so those who leave early may be less likely to see owls.

Please note that you may or may not see any owls on a given night. We have no way to predict the number or timing of owls, so there may be nights with no owls and there may be nights with lots. We have no way to know ahead of time.

This activity is highly weather dependent. We will have to cancel if there is rain or if there is a small craft advisory. If we have to cancel, I will email everyone who has signed up by 4PM.

Sampling may be canceled due to weather. Sampling start times for each evening will shift somewhat as days get shorter and with the end of daylight savings time. Specific start times will be sent the week before the event.

Contact Alison Cawood at cawooda@si.edu for questions.

 
 
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Synchronized fluctuations in global marine fisheries

Synchronized fluctuations in global marine fisheries

Thursday, November 21, 2019 - 11:00am - 12:00pm
Event Location
Schmidt Conference Center

Speaker: Dr. Joyce JL Ong, Postdocotoral Associate, Rutgers University

Advance Registration Required
No

Event Details

Talk Summary:

Marine resources and fisheries are coupled social-ecological systems that make substantial contributions toward food, livelihoods and foreign trade for many countries. While fisheries are often managed as independent populations, human and ecosystem processes link fisheries together in complex networks. Synchronous fluctuations among fisheries amplify variation and can destabilize ecosystems and economies, but the strength of synchrony remains unclear. Here, we analyzed 1092 marine fisheries catch time-series representing 510 unique species over 60 years to test for the presence of coherence—a form of synchrony that allows for phase-lagged relationships. We found five times as many pairs of coherent fisheries as expected from a null model and nearly every fishery was coherent with at least one other fishery globally. Coherence was strongest in the northeast Atlantic, western central Pacific, and eastern Indian Ocean and among large pelagic species (tunas and billfishes). Most of these relationships were synchronous with no time lags, which implied external factors such as fishing behavior and climate.

Our Thursday morning seminars are free and open to the public. Because they are targeted towards a scientific audience, they are more technical than our monthly evening lectures. Our evening lectures will resume in January 2020. Find out more about our evening lecture series.

11:00AM - 12:00PM
 
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